Summary

55bdae6f51cb9ff4_backup.exe

File 55bdae6f51cb9ff4_backup.exe

Summary
Download Resubmit sample

Size 92.4KB
Type PE32 executable (GUI) Intel 80386 (stripped to external PDB), for MS Windows, UPX compressed
MD5 5909dd2ab7024ea381756dfb3b22b8b8
SHA1 fc918839026e32b5639ae83cf7143581596eec6a
SHA256 55bdae6f51cb9ff43cf09eda0983a8b6b28b26aa58e7b74c24c777126ed6d64b
SHA512
70964c54343db47a77142cff2e7698259326e1a5ec398a8ea71027862366cff6f696924c7989d319b3c6c2a73df613df651fae4e9ff00db5f39f5a6e2ae0cb0c
CRC32 C9AAD723
ssdeep None
Yara
  • suspicious_packer_section - The packer/protector section names/keywords
  • SEH__vba - (no description)
  • escalate_priv - Escalade priviledges
  • win_mutex - Create or check mutex
  • win_registry - Affect system registries
  • win_token - Affect system token

Score

This file is very suspicious, with a score of 10 out of 10!

Please notice: The scoring system is currently still in development and should be considered an alpha feature.

Autosubmit

Parent_Task_ID:6574053

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Information on Execution

Analysis
Category Started Completed Duration Routing Logs
FILE June 27, 2025, 11:34 a.m. June 27, 2025, 11:44 a.m. 572 seconds internet Show Analyzer Log
Show Cuckoo Log

Analyzer Log

2025-06-22 01:43:46,015 [analyzer] DEBUG: Starting analyzer from: C:\tmpblqbwr
2025-06-22 01:43:46,015 [analyzer] DEBUG: Pipe server name: \??\PIPE\cWBSjgQrSfgNBNlKQNw
2025-06-22 01:43:46,015 [analyzer] DEBUG: Log pipe server name: \??\PIPE\sAACzuPCxMBgaMjGfWfWZ
2025-06-22 01:43:46,015 [analyzer] DEBUG: No analysis package specified, trying to detect it automagically.
2025-06-22 01:43:46,030 [analyzer] INFO: Automatically selected analysis package "exe"
2025-06-22 01:43:46,296 [analyzer] DEBUG: Started auxiliary module Curtain
2025-06-22 01:43:46,296 [analyzer] DEBUG: Started auxiliary module DbgView
2025-06-22 01:43:46,812 [analyzer] DEBUG: Started auxiliary module Disguise
2025-06-22 01:43:47,015 [analyzer] DEBUG: Loaded monitor into process with pid 504
2025-06-22 01:43:47,015 [analyzer] DEBUG: Started auxiliary module DumpTLSMasterSecrets
2025-06-22 01:43:47,015 [analyzer] DEBUG: Started auxiliary module Human
2025-06-22 01:43:47,015 [analyzer] DEBUG: Started auxiliary module InstallCertificate
2025-06-22 01:43:47,015 [analyzer] DEBUG: Started auxiliary module Reboot
2025-06-22 01:43:47,062 [analyzer] DEBUG: Started auxiliary module RecentFiles
2025-06-22 01:43:47,062 [analyzer] DEBUG: Started auxiliary module Screenshots
2025-06-22 01:43:47,078 [analyzer] DEBUG: Started auxiliary module Sysmon
2025-06-22 01:43:47,078 [analyzer] DEBUG: Started auxiliary module LoadZer0m0n
2025-06-22 01:43:47,203 [lib.api.process] INFO: Successfully executed process from path u'C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\55bdae6f51cb9ff4_backup.exe' with arguments '' and pid 1472
2025-06-22 01:43:47,437 [analyzer] DEBUG: Loaded monitor into process with pid 1472
2025-06-22 01:43:47,515 [analyzer] INFO: Added new file to list with pid 1472 and path C:\Users\Administrator\AppData\Local\Temp\backup.exe
2025-06-22 01:43:47,530 [analyzer] INFO: Added new file to list with pid 1472 and path C:\Users\Administrator\AppData\Local\Temp\0C7910BA-F902-421E-9E69-CF9AEE0DD4D7\backup.exe
2025-06-22 01:43:47,592 [analyzer] INFO: Injected into process with pid 2924 and name ''
2025-06-22 01:43:47,750 [analyzer] DEBUG: Loaded monitor into process with pid 2924
2025-06-22 01:43:47,828 [analyzer] INFO: Added new file to list with pid 1472 and path C:\Users\Administrator\AppData\Local\Temp\9C7EA51D-B2B9-4ABB-A82F-1B32707A146E\update.exe
2025-06-22 01:43:48,000 [analyzer] INFO: Added new file to list with pid 1472 and path C:\Users\Administrator\AppData\Local\Temp\hsperfdata_Administrator\backup.exe
2025-06-22 01:43:48,796 [analyzer] INFO: Added new file to list with pid 2924 and path C:\backup.exe
2025-06-22 01:47:06,203 [analyzer] INFO: Analysis timeout hit, terminating analysis.
2025-06-22 01:47:09,265 [analyzer] INFO: Terminating remaining processes before shutdown.
2025-06-22 01:47:09,265 [lib.api.process] INFO: Successfully terminated process with pid 1472.
2025-06-22 01:47:09,265 [lib.api.process] INFO: Successfully terminated process with pid 2924.
2025-06-22 01:47:09,296 [analyzer] INFO: Analysis completed.

Cuckoo Log

2025-06-27 11:34:48,583 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:34:49,667 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:34:51,061 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:34:52,368 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:34:53,411 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:34:54,436 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:34:55,507 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:34:56,586 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:34:57,644 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:34:58,704 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:34:59,757 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:35:00,834 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:35:02,059 [cuckoo.core.scheduler] DEBUG: Task #6600705: no machine available yet
2025-06-27 11:35:03,157 [cuckoo.core.scheduler] INFO: Task #6600705: acquired machine win7x6418 (label=win7x6418)
2025-06-27 11:35:03,159 [cuckoo.core.resultserver] DEBUG: Now tracking machine 192.168.168.218 for task #6600705
2025-06-27 11:35:03,687 [cuckoo.auxiliary.sniffer] INFO: Started sniffer with PID 188487 (interface=vboxnet0, host=192.168.168.218)
2025-06-27 11:35:03,784 [cuckoo.machinery.virtualbox] DEBUG: Starting vm win7x6418
2025-06-27 11:35:04,530 [cuckoo.machinery.virtualbox] DEBUG: Restoring virtual machine win7x6418 to vmcloak
2025-06-27 11:38:18,325 [cuckoo.core.guest] INFO: Starting analysis #6600705 on guest (id=win7x6418, ip=192.168.168.218)
2025-06-27 11:38:19,329 [cuckoo.core.guest] DEBUG: win7x6418: not ready yet
2025-06-27 11:38:24,349 [cuckoo.core.guest] INFO: Guest is running Cuckoo Agent 0.10 (id=win7x6418, ip=192.168.168.218)
2025-06-27 11:38:24,492 [cuckoo.core.guest] DEBUG: Uploading analyzer to guest (id=win7x6418, ip=192.168.168.218, monitor=latest, size=6660546)
2025-06-27 11:38:25,768 [cuckoo.core.resultserver] DEBUG: Task #6600705: live log analysis.log initialized.
2025-06-27 11:38:26,732 [cuckoo.core.resultserver] DEBUG: Task #6600705 is sending a BSON stream
2025-06-27 11:38:27,139 [cuckoo.core.resultserver] DEBUG: Task #6600705 is sending a BSON stream
2025-06-27 11:38:27,451 [cuckoo.core.resultserver] DEBUG: Task #6600705 is sending a BSON stream
2025-06-27 11:38:27,965 [cuckoo.core.resultserver] DEBUG: Task #6600705: File upload for 'shots/0001.jpg'
2025-06-27 11:38:27,977 [cuckoo.core.resultserver] DEBUG: Task #6600705 uploaded file length: 133461
2025-06-27 11:38:40,910 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:38:56,322 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:39:11,479 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:39:26,671 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:39:41,815 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:39:57,232 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:40:13,437 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:40:30,896 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:40:46,009 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:41:01,274 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:41:17,227 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:41:32,897 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:41:46,224 [cuckoo.core.resultserver] DEBUG: Task #6600705: File upload for 'curtain/1750549626.44.curtain.log'
2025-06-27 11:41:46,242 [cuckoo.core.resultserver] DEBUG: Task #6600705 uploaded file length: 36
2025-06-27 11:41:47,969 [cuckoo.core.resultserver] DEBUG: Task #6600705: File upload for 'sysmon/1750549627.55.sysmon.xml'
2025-06-27 11:41:48,387 [cuckoo.core.guest] DEBUG: win7x6418: analysis #6600705 still processing
2025-06-27 11:41:49,115 [cuckoo.core.resultserver] DEBUG: Task #6600705 uploaded file length: 11844322
2025-06-27 11:41:49,147 [cuckoo.core.resultserver] DEBUG: Task #6600705 had connection reset for <Context for LOG>
2025-06-27 11:41:49,178 [cuckoo.core.resultserver] DEBUG: Task #6600705: File upload for 'files/471f3a1caa3ecde4_backup.exe'
2025-06-27 11:41:49,225 [cuckoo.core.resultserver] DEBUG: Task #6600705 uploaded file length: 94620
2025-06-27 11:41:49,247 [cuckoo.core.resultserver] DEBUG: Task #6600705: File upload for 'files/2fc35c575ad69162_backup.exe'
2025-06-27 11:41:49,286 [cuckoo.core.resultserver] DEBUG: Task #6600705 uploaded file length: 94622
2025-06-27 11:41:49,298 [cuckoo.core.resultserver] DEBUG: Task #6600705: File upload for 'files/1e252167b77e73b5_backup.exe'
2025-06-27 11:41:49,328 [cuckoo.core.resultserver] DEBUG: Task #6600705 uploaded file length: 94620
2025-06-27 11:41:51,898 [cuckoo.core.guest] INFO: win7x6418: analysis completed successfully
2025-06-27 11:41:52,034 [cuckoo.core.plugins] DEBUG: Stopped auxiliary module: Redsocks
2025-06-27 11:41:52,086 [cuckoo.core.plugins] DEBUG: Stopped auxiliary module: Sniffer
2025-06-27 11:41:53,373 [cuckoo.machinery.virtualbox] INFO: Successfully generated memory dump for virtual machine with label win7x6418 to path /srv/cuckoo/cwd/storage/analyses/6600705/memory.dmp
2025-06-27 11:41:53,389 [cuckoo.machinery.virtualbox] DEBUG: Stopping vm win7x6418
2025-06-27 11:44:18,515 [cuckoo.core.resultserver] DEBUG: Stopped tracking machine 192.168.168.218 for task #6600705
2025-06-27 11:44:21,103 [cuckoo.core.scheduler] DEBUG: Released database task #6600705
2025-06-27 11:44:21,141 [cuckoo.core.scheduler] INFO: Task #6600705: analysis procedure completed

Signatures

Yara rules detected for file (6 events)
description The packer/protector section names/keywords rule suspicious_packer_section
description (no description) rule SEH__vba
description Escalade priviledges rule escalate_priv
description Create or check mutex rule win_mutex
description Affect system registries rule win_registry
description Affect system token rule win_token
The executable contains unknown PE section names indicative of a packer (could be a false positive) (1 event)
section .imports
Creates executable files on the filesystem (5 events)
file C:\Users\Administrator\AppData\Local\Temp\0C7910BA-F902-421E-9E69-CF9AEE0DD4D7\backup.exe
file C:\Users\Administrator\AppData\Local\Temp\9C7EA51D-B2B9-4ABB-A82F-1B32707A146E\update.exe
file C:\backup.exe
file C:\Users\Administrator\AppData\Local\Temp\backup.exe
file C:\Users\Administrator\AppData\Local\Temp\hsperfdata_Administrator\backup.exe
Drops an executable to the user AppData folder (1 event)
file C:\Users\Administrator\AppData\Local\Temp\0C7910BA-F902-421E-9E69-CF9AEE0DD4D7\backup.exe
Changes read-write memory protection to read-execute (probably to avoid detection when setting all RWX flags at the same time) (1 event)
Time & API Arguments Status Return Repeated

NtProtectVirtualMemory

 process_identifier: 1472
stack_dep_bypass: 0
stack_pivoted: 0
heap_dep_bypass: 1
length: 24576
protection: 32 (PAGE_EXECUTE_READ)
base_address: 0x007d0000
process_handle: 0xffffffff
1 0 0
The executable is compressed using UPX (2 events)
section UPX0 description Section name indicates UPX
section UPX1 description Section name indicates UPX
Attempts to modify Explorer settings to prevent file extensions from being displayed (1 event)
registry HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt
Attempts to modify Explorer settings to prevent hidden files from being displayed (1 event)
registry HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Hidden
File has been identified by 14 AntiVirus engine on IRMA as malicious (14 events)
G Data Antivirus (Windows) Virus: Trojan.GenericKD.44959075 (Engine A), Win32.Trojan.Vilsel.A (Engine B)
Avast Core Security (Linux) Win32:Vilsel-CT [Trj]
C4S ClamAV (Linux) Win.Malware.Genpack-6989317-0
Trend Micro SProtect (Linux) WORM_VILSEL.SMB
Trellix (Linux) Generic VB.z trojan
WithSecure (Linux) Trojan.TR/Dropper.Gen
eScan Antivirus (Linux) Trojan.GenericKD.44959075(DB)
ESET Security (Windows) Win32/VB.OZA trojan
Sophos Anti-Virus (Linux) Troj/VB-LET
DrWeb Antivirus (Linux) Trojan.Copyself.102
ClamAV (Linux) Win.Malware.Genpack-6989317-0
Bitdefender Antivirus (Linux) Trojan.GenericKD.44959075
Kaspersky Standard (Windows) Trojan.Win32.Vilsel.loy
Emsisoft Commandline Scanner (Windows) Trojan.GenericKD.44959075 (B)
Screenshots
Name Response Post-Analysis Lookup
No hosts contacted.
IP Address Status Action VT Location
No hosts contacted.
Cuckoo

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