Summary

a8bb8d43053b171d_backup.exe

File a8bb8d43053b171d_backup.exe

Summary
Download Resubmit sample

Size 82.2KB
Type PE32 executable (GUI) Intel 80386 (stripped to external PDB), for MS Windows, UPX compressed
MD5 8b9ef7f0711145f2d8c7407d82fa6bd1
SHA1 802ee72866b80a311ae28044b42b0ae72af6aa05
SHA256 a8bb8d43053b171da0ab80cd3ca581eb534d415e97a39d47bb6e518cc3342aad
SHA512
5958d606b6fbb8727d4de82c141eb09881d8ff7d60e272b1484e2cae5c868905ed7f7db0f0035b84cb0ac6bea9200c95bf857eddee4e7aa099f3f623a607f3d3
CRC32 CC529529
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:6746929

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Information on Execution

Analysis
Category Started Completed Duration Routing Logs
FILE July 23, 2025, 11:02 a.m. July 23, 2025, 11:07 a.m. 293 seconds internet Show Analyzer Log
Show Cuckoo Log

Analyzer Log

2025-07-23 07:59:06,015 [analyzer] DEBUG: Starting analyzer from: C:\tmpmdfut4
2025-07-23 07:59:06,015 [analyzer] DEBUG: Pipe server name: \??\PIPE\gQqQspBdDsJywooALqWRwHYigpe
2025-07-23 07:59:06,015 [analyzer] DEBUG: Log pipe server name: \??\PIPE\KhzwkeGpeMYdbtGLgQKbzk
2025-07-23 07:59:06,015 [analyzer] DEBUG: No analysis package specified, trying to detect it automagically.
2025-07-23 07:59:06,015 [analyzer] INFO: Automatically selected analysis package "exe"
2025-07-23 07:59:06,421 [analyzer] DEBUG: Started auxiliary module Curtain
2025-07-23 07:59:06,437 [analyzer] DEBUG: Started auxiliary module DbgView
2025-07-23 07:59:06,890 [analyzer] DEBUG: Started auxiliary module Disguise
2025-07-23 07:59:07,092 [analyzer] DEBUG: Loaded monitor into process with pid 504
2025-07-23 07:59:07,092 [analyzer] DEBUG: Started auxiliary module DumpTLSMasterSecrets
2025-07-23 07:59:07,092 [analyzer] DEBUG: Started auxiliary module Human
2025-07-23 07:59:07,092 [analyzer] DEBUG: Started auxiliary module InstallCertificate
2025-07-23 07:59:07,108 [analyzer] DEBUG: Started auxiliary module Reboot
2025-07-23 07:59:07,203 [analyzer] DEBUG: Started auxiliary module RecentFiles
2025-07-23 07:59:07,203 [analyzer] DEBUG: Started auxiliary module Screenshots
2025-07-23 07:59:07,203 [analyzer] DEBUG: Started auxiliary module Sysmon
2025-07-23 07:59:07,203 [analyzer] DEBUG: Started auxiliary module LoadZer0m0n
2025-07-23 07:59:07,342 [lib.api.process] INFO: Successfully executed process from path u'C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\a8bb8d43053b171d_backup.exe' with arguments '' and pid 2552
2025-07-23 07:59:07,562 [analyzer] DEBUG: Loaded monitor into process with pid 2552
2025-07-23 07:59:07,640 [analyzer] INFO: Added new file to list with pid 2552 and path C:\Users\Administrator\AppData\Local\Temp\backup.exe
2025-07-23 07:59:07,655 [analyzer] INFO: Added new file to list with pid 2552 and path C:\Users\Administrator\AppData\Local\Temp\0C7910BA-F902-421E-9E69-CF9AEE0DD4D7\backup.exe
2025-07-23 07:59:07,750 [analyzer] INFO: Injected into process with pid 2032 and name ''
2025-07-23 07:59:07,921 [analyzer] DEBUG: Loaded monitor into process with pid 2032
2025-07-23 07:59:08,015 [analyzer] INFO: Added new file to list with pid 2552 and path C:\Users\Administrator\AppData\Local\Temp\9C7EA51D-B2B9-4ABB-A82F-1B32707A146E\backup.exe
2025-07-23 07:59:08,125 [analyzer] INFO: Added new file to list with pid 2552 and path C:\Users\Administrator\AppData\Local\Temp\hsperfdata_Administrator\backup.exe
2025-07-23 07:59:08,983 [analyzer] INFO: Added new file to list with pid 2032 and path C:\backup.exe
2025-07-23 10:06:38,605 [analyzer] INFO: Analysis timeout hit, terminating analysis.
2025-07-23 10:06:39,762 [analyzer] INFO: Terminating remaining processes before shutdown.
2025-07-23 10:06:39,762 [lib.api.process] INFO: Successfully terminated process with pid 2552.
2025-07-23 10:06:39,762 [lib.api.process] INFO: Successfully terminated process with pid 2032.
2025-07-23 10:06:39,778 [analyzer] INFO: Analysis completed.

Cuckoo Log

2025-07-23 11:02:21,535 [cuckoo.core.scheduler] INFO: Task #6755835: acquired machine win7x644 (label=win7x644)
2025-07-23 11:02:21,536 [cuckoo.core.resultserver] DEBUG: Now tracking machine 192.168.168.204 for task #6755835
2025-07-23 11:02:22,002 [cuckoo.auxiliary.sniffer] INFO: Started sniffer with PID 2460845 (interface=vboxnet0, host=192.168.168.204)
2025-07-23 11:02:22,079 [cuckoo.machinery.virtualbox] DEBUG: Starting vm win7x644
2025-07-23 11:02:23,299 [cuckoo.machinery.virtualbox] DEBUG: Restoring virtual machine win7x644 to vmcloak
2025-07-23 11:03:10,408 [cuckoo.core.guest] INFO: Starting analysis #6755835 on guest (id=win7x644, ip=192.168.168.204)
2025-07-23 11:03:11,415 [cuckoo.core.guest] DEBUG: win7x644: not ready yet
2025-07-23 11:03:16,445 [cuckoo.core.guest] INFO: Guest is running Cuckoo Agent 0.10 (id=win7x644, ip=192.168.168.204)
2025-07-23 11:03:16,547 [cuckoo.core.guest] DEBUG: Uploading analyzer to guest (id=win7x644, ip=192.168.168.204, monitor=latest, size=6660546)
2025-07-23 11:03:18,234 [cuckoo.core.resultserver] DEBUG: Task #6755835: live log analysis.log initialized.
2025-07-23 11:03:19,280 [cuckoo.core.resultserver] DEBUG: Task #6755835 is sending a BSON stream
2025-07-23 11:03:19,734 [cuckoo.core.resultserver] DEBUG: Task #6755835 is sending a BSON stream
2025-07-23 11:03:20,094 [cuckoo.core.resultserver] DEBUG: Task #6755835 is sending a BSON stream
2025-07-23 11:03:20,601 [cuckoo.core.resultserver] DEBUG: Task #6755835: File upload for 'shots/0001.jpg'
2025-07-23 11:03:20,619 [cuckoo.core.resultserver] DEBUG: Task #6755835 uploaded file length: 133495
2025-07-23 11:03:32,855 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:03:48,770 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:04:04,267 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:04:19,528 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:04:34,727 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:04:49,830 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:05:05,606 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:05:20,712 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:05:35,790 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:05:51,321 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:06:06,700 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:06:21,878 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:06:37,016 [cuckoo.core.guest] DEBUG: win7x644: analysis #6755835 still processing
2025-07-23 11:06:38,792 [cuckoo.core.resultserver] DEBUG: Task #6755835: File upload for 'curtain/1753257998.78.curtain.log'
2025-07-23 11:06:38,797 [cuckoo.core.resultserver] DEBUG: Task #6755835 uploaded file length: 36
2025-07-23 11:06:39,677 [cuckoo.core.resultserver] DEBUG: Task #6755835: File upload for 'sysmon/1753257999.67.sysmon.xml'
2025-07-23 11:06:39,765 [cuckoo.core.resultserver] DEBUG: Task #6755835 uploaded file length: 13406284
2025-07-23 11:06:39,792 [cuckoo.core.resultserver] DEBUG: Task #6755835: File upload for 'files/3cef0fa967599dfa_backup.exe'
2025-07-23 11:06:39,795 [cuckoo.core.resultserver] DEBUG: Task #6755835: File upload for 'files/1ff1865ea45bc411_backup.exe'
2025-07-23 11:06:39,797 [cuckoo.core.resultserver] DEBUG: Task #6755835: File upload for 'files/53b6b3f41051a31c_backup.exe'
2025-07-23 11:06:39,799 [cuckoo.core.resultserver] DEBUG: Task #6755835 uploaded file length: 84164
2025-07-23 11:06:39,800 [cuckoo.core.resultserver] DEBUG: Task #6755835 uploaded file length: 84162
2025-07-23 11:06:39,802 [cuckoo.core.resultserver] DEBUG: Task #6755835 uploaded file length: 84162
2025-07-23 11:06:39,812 [cuckoo.core.resultserver] DEBUG: Task #6755835 had connection reset for <Context for LOG>
2025-07-23 11:06:40,029 [cuckoo.core.guest] INFO: win7x644: analysis completed successfully
2025-07-23 11:06:40,046 [cuckoo.core.plugins] DEBUG: Stopped auxiliary module: Redsocks
2025-07-23 11:06:40,069 [cuckoo.core.plugins] DEBUG: Stopped auxiliary module: Sniffer
2025-07-23 11:06:41,415 [cuckoo.machinery.virtualbox] INFO: Successfully generated memory dump for virtual machine with label win7x644 to path /srv/cuckoo/cwd/storage/analyses/6755835/memory.dmp
2025-07-23 11:06:41,416 [cuckoo.machinery.virtualbox] DEBUG: Stopping vm win7x644
2025-07-23 11:07:14,362 [cuckoo.core.resultserver] DEBUG: Stopped tracking machine 192.168.168.204 for task #6755835
2025-07-23 11:07:14,961 [cuckoo.core.scheduler] DEBUG: Released database task #6755835
2025-07-23 11:07:14,975 [cuckoo.core.scheduler] INFO: Task #6755835: 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:\backup.exe
file C:\Users\Administrator\AppData\Local\Temp\backup.exe
file C:\Users\Administrator\AppData\Local\Temp\9C7EA51D-B2B9-4ABB-A82F-1B32707A146E\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: 2552
stack_dep_bypass: 0
stack_pivoted: 0
heap_dep_bypass: 1
length: 24576
protection: 32 (PAGE_EXECUTE_READ)
base_address: 0x003e0000
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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