Summary

f9c526cf991875f3_backup.exe

File f9c526cf991875f3_backup.exe

Summary
Download Resubmit sample

Size 88.3KB
Type PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed
MD5 719c7797cecdaf232c6a0be50fbdd14d
SHA1 2746b631b262198ee2b6e15dbf3f4073a6b40af2
SHA256 f9c526cf991875f34c86aa44c72e0ebcebf758f63e655fcd6e1c3c34143bd6b2
SHA512
13a72d51fbd2225e6aaa33ec72302ad5d43e9b8342cc33803aa8c852d25b6ef8897dfced7878b6a74334cba2da828997fb61207034768d6a0c91e95ac10ee69a
CRC32 2B57143D
ssdeep None
Yara
  • UPX - (no description)
  • suspicious_packer_section - The packer/protector section names/keywords

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:6700427

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Information on Execution

Analysis
Category Started Completed Duration Routing Logs
FILE July 17, 2025, 4:20 p.m. July 17, 2025, 4:29 p.m. 539 seconds internet Show Analyzer Log
Show Cuckoo Log

Analyzer Log

2025-07-13 19:42:15,000 [analyzer] DEBUG: Starting analyzer from: C:\tmphzbxu3
2025-07-13 19:42:15,015 [analyzer] DEBUG: Pipe server name: \??\PIPE\cBHUpLiRgHHCTfPUeJPFQaUeaHNv
2025-07-13 19:42:15,015 [analyzer] DEBUG: Log pipe server name: \??\PIPE\YRpoWWUilTTljoPQojXVQ
2025-07-13 19:42:15,015 [analyzer] DEBUG: No analysis package specified, trying to detect it automagically.
2025-07-13 19:42:15,015 [analyzer] INFO: Automatically selected analysis package "exe"
2025-07-13 19:42:15,250 [analyzer] DEBUG: Started auxiliary module Curtain
2025-07-13 19:42:15,250 [analyzer] DEBUG: Started auxiliary module DbgView
2025-07-13 19:42:15,655 [analyzer] DEBUG: Started auxiliary module Disguise
2025-07-13 19:42:15,858 [analyzer] DEBUG: Loaded monitor into process with pid 500
2025-07-13 19:42:15,858 [analyzer] DEBUG: Started auxiliary module DumpTLSMasterSecrets
2025-07-13 19:42:15,858 [analyzer] DEBUG: Started auxiliary module Human
2025-07-13 19:42:15,858 [analyzer] DEBUG: Started auxiliary module InstallCertificate
2025-07-13 19:42:15,858 [analyzer] DEBUG: Started auxiliary module Reboot
2025-07-13 19:42:15,921 [analyzer] DEBUG: Started auxiliary module RecentFiles
2025-07-13 19:42:15,921 [analyzer] DEBUG: Started auxiliary module Screenshots
2025-07-13 19:42:15,937 [analyzer] DEBUG: Started auxiliary module Sysmon
2025-07-13 19:42:15,937 [analyzer] DEBUG: Started auxiliary module LoadZer0m0n
2025-07-13 19:42:16,062 [lib.api.process] INFO: Successfully executed process from path u'C:\\Users\\ADMINI~1\\AppData\\Local\\Temp\\f9c526cf991875f3_backup.exe' with arguments '' and pid 2580
2025-07-13 19:42:16,265 [analyzer] DEBUG: Loaded monitor into process with pid 2580
2025-07-13 19:42:16,312 [analyzer] INFO: Added new file to list with pid 2580 and path C:\Users\Administrator\AppData\Local\Temp\backup.exe
2025-07-13 19:42:16,328 [analyzer] INFO: Added new file to list with pid 2580 and path C:\Users\Administrator\AppData\Local\Temp\0C7910BA-F902-421E-9E69-CF9AEE0DD4D7\data.exe
2025-07-13 19:42:16,390 [analyzer] INFO: Injected into process with pid 2248 and name ''
2025-07-13 19:42:16,562 [analyzer] DEBUG: Loaded monitor into process with pid 2248
2025-07-13 19:42:16,625 [analyzer] INFO: Added new file to list with pid 2580 and path C:\Users\Administrator\AppData\Local\Temp\9C7EA51D-B2B9-4ABB-A82F-1B32707A146E\backup.exe
2025-07-13 19:42:16,687 [analyzer] INFO: Added new file to list with pid 2580 and path C:\Users\Administrator\AppData\Local\Temp\hsperfdata_Administrator\backup.exe
2025-07-13 19:42:17,592 [analyzer] INFO: Added new file to list with pid 2248 and path C:\update.exe
2025-07-13 19:45:35,062 [analyzer] INFO: Analysis timeout hit, terminating analysis.
2025-07-13 19:45:36,140 [analyzer] INFO: Terminating remaining processes before shutdown.
2025-07-13 19:45:36,155 [lib.api.process] INFO: Successfully terminated process with pid 2580.
2025-07-13 19:45:36,155 [lib.api.process] INFO: Successfully terminated process with pid 2248.
2025-07-13 19:45:36,171 [analyzer] INFO: Analysis completed.

Cuckoo Log

2025-07-17 16:20:56,292 [cuckoo.core.scheduler] INFO: Task #6727562: acquired machine win7x6425 (label=win7x6425)
2025-07-17 16:20:56,293 [cuckoo.core.resultserver] DEBUG: Now tracking machine 192.168.168.225 for task #6727562
2025-07-17 16:20:56,990 [cuckoo.auxiliary.sniffer] INFO: Started sniffer with PID 592242 (interface=vboxnet0, host=192.168.168.225)
2025-07-17 16:20:57,704 [cuckoo.machinery.virtualbox] DEBUG: Starting vm win7x6425
2025-07-17 16:20:58,988 [cuckoo.machinery.virtualbox] DEBUG: Restoring virtual machine win7x6425 to vmcloak
2025-07-17 16:24:00,569 [cuckoo.core.guest] INFO: Starting analysis #6727562 on guest (id=win7x6425, ip=192.168.168.225)
2025-07-17 16:24:01,573 [cuckoo.core.guest] DEBUG: win7x6425: not ready yet
2025-07-17 16:24:06,593 [cuckoo.core.guest] INFO: Guest is running Cuckoo Agent 0.10 (id=win7x6425, ip=192.168.168.225)
2025-07-17 16:24:06,655 [cuckoo.core.guest] DEBUG: Uploading analyzer to guest (id=win7x6425, ip=192.168.168.225, monitor=latest, size=6660546)
2025-07-17 16:24:07,799 [cuckoo.core.resultserver] DEBUG: Task #6727562: live log analysis.log initialized.
2025-07-17 16:24:08,590 [cuckoo.core.resultserver] DEBUG: Task #6727562 is sending a BSON stream
2025-07-17 16:24:08,981 [cuckoo.core.resultserver] DEBUG: Task #6727562 is sending a BSON stream
2025-07-17 16:24:09,278 [cuckoo.core.resultserver] DEBUG: Task #6727562 is sending a BSON stream
2025-07-17 16:24:09,812 [cuckoo.core.resultserver] DEBUG: Task #6727562: File upload for 'shots/0001.jpg'
2025-07-17 16:24:09,826 [cuckoo.core.resultserver] DEBUG: Task #6727562 uploaded file length: 133493
2025-07-17 16:24:22,527 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:24:37,724 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:24:53,052 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:25:08,251 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:25:23,799 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:25:39,210 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:25:54,364 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:26:09,622 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:26:25,099 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:26:40,873 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:26:56,217 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:27:12,137 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:27:27,599 [cuckoo.core.guest] DEBUG: win7x6425: analysis #6727562 still processing
2025-07-17 16:27:28,139 [cuckoo.core.resultserver] DEBUG: Task #6727562: File upload for 'curtain/1752428735.25.curtain.log'
2025-07-17 16:27:28,148 [cuckoo.core.resultserver] DEBUG: Task #6727562 uploaded file length: 36
2025-07-17 16:27:28,854 [cuckoo.core.resultserver] DEBUG: Task #6727562: File upload for 'sysmon/1752428735.97.sysmon.xml'
2025-07-17 16:27:28,948 [cuckoo.core.resultserver] DEBUG: Task #6727562 uploaded file length: 9949456
2025-07-17 16:27:28,989 [cuckoo.core.resultserver] DEBUG: Task #6727562: File upload for 'files/0a5fe6013e17563d_backup.exe'
2025-07-17 16:27:28,991 [cuckoo.core.resultserver] DEBUG: Task #6727562: File upload for 'files/6cd96d2cb2eb354c_update.exe'
2025-07-17 16:27:28,995 [cuckoo.core.resultserver] DEBUG: Task #6727562 uploaded file length: 90376
2025-07-17 16:27:28,997 [cuckoo.core.resultserver] DEBUG: Task #6727562 uploaded file length: 90374
2025-07-17 16:27:28,998 [cuckoo.core.resultserver] DEBUG: Task #6727562 had connection reset for <Context for LOG>
2025-07-17 16:27:30,638 [cuckoo.core.guest] INFO: win7x6425: analysis completed successfully
2025-07-17 16:27:30,656 [cuckoo.core.plugins] DEBUG: Stopped auxiliary module: Redsocks
2025-07-17 16:27:30,684 [cuckoo.core.plugins] DEBUG: Stopped auxiliary module: Sniffer
2025-07-17 16:27:32,661 [cuckoo.machinery.virtualbox] INFO: Successfully generated memory dump for virtual machine with label win7x6425 to path /srv/cuckoo/cwd/storage/analyses/6727562/memory.dmp
2025-07-17 16:27:32,680 [cuckoo.machinery.virtualbox] DEBUG: Stopping vm win7x6425
2025-07-17 16:29:55,456 [cuckoo.core.resultserver] DEBUG: Stopped tracking machine 192.168.168.225 for task #6727562
2025-07-17 16:29:55,821 [cuckoo.core.scheduler] DEBUG: Released database task #6727562
2025-07-17 16:29:55,861 [cuckoo.core.scheduler] INFO: Task #6727562: analysis procedure completed

Signatures

Yara rules detected for file (2 events)
description (no description) rule UPX
description The packer/protector section names/keywords rule suspicious_packer_section
Creates executable files on the filesystem (5 events)
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:\update.exe
file C:\Users\Administrator\AppData\Local\Temp\0C7910BA-F902-421E-9E69-CF9AEE0DD4D7\data.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\9C7EA51D-B2B9-4ABB-A82F-1B32707A146E\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: 2580
stack_dep_bypass: 0
stack_pivoted: 0
heap_dep_bypass: 1
length: 24576
protection: 32 (PAGE_EXECUTE_READ)
base_address: 0x00320000
process_handle: 0xffffffff
1 0 0
The binary likely contains encrypted or compressed data indicative of a packer (2 events)
section {u'size_of_data': u'0x00003e00', u'virtual_address': u'0x00011000', u'entropy': 7.804677160000422, u'name': u'UPX1', u'virtual_size': u'0x00004000'} entropy 7.80467716 description A section with a high entropy has been found
entropy 0.392405063291 description Overall entropy of this PE file is high
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 13 AntiVirus engine on IRMA as malicious (13 events)
G Data Antivirus (Windows) Virus: Trojan.Generic.4385790 (Engine A), Win32.Trojan.Vilsel.B (Engine B)
Avast Core Security (Linux) Win32:Evo-gen [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/Crypt.ULPM.Gen
eScan Antivirus (Linux) Trojan.Generic.4385790(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.Generic.4385790
Emsisoft Commandline Scanner (Windows) Trojan.Generic.4385790 (B)
Screenshots
Name Response Post-Analysis Lookup
No hosts contacted.
IP Address Status Action VT Location
No hosts contacted.
Cuckoo

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