Malware Analysis Report

2025-01-03 08:48

Sample ID 240506-k3lh5aac65
Target GandCrab.exe
SHA256 bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a
Tags
gandcrab backdoor ransomware spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a

Threat Level: Known bad

The file GandCrab.exe was found to be: Known bad.

Malicious Activity Summary

gandcrab backdoor ransomware spyware stealer

Gandcrab

Renames multiple (271) files with added filename extension

Drops startup file

Reads user/profile data of web browsers

Checks computer location settings

Enumerates connected drives

Sets desktop wallpaper using registry

Drops file in Program Files directory

Unsigned PE

Enumerates physical storage devices

Program crash

Suspicious use of WriteProcessMemory

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-06 09:07

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-06 09:07

Reported

2024-05-06 09:10

Platform

win10v2004-20240426-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\GandCrab.exe"

Signatures

Gandcrab

ransomware backdoor gandcrab

Renames multiple (271) files with added filename extension

ransomware

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\PQIBTG-MANUAL.txt C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\de3a2747de3a20a96e.lock C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A

Reads user/profile data of web browsers

spyware stealer

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\\\bxmeoengtf.bmp" C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files\de3a2747de3a20a96e.lock C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\JoinDismount.mpe C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\ReadSkip.aiff C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\RedoMeasure.M2V C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File created C:\Program Files (x86)\PQIBTG-MANUAL.txt C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File created C:\Program Files (x86)\de3a2747de3a20a96e.lock C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\UnblockSync.rtf C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\CloseWrite.kix C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\CopyRemove.rle C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\EditCompare.m1v C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\MeasureSubmit.odt C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\RepairClear.xml C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\SaveReceive.rmi C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\CloseUnprotect.i64 C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\CompleteFind.3gp2 C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\PushClose.aif C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\RegisterBlock.ps1 C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\RestoreRegister.mov C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\RevokeStop.search-ms C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File created C:\Program Files\PQIBTG-MANUAL.txt C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\ClearStep.mp4 C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\OpenDismount.fon C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
File opened for modification C:\Program Files\UnpublishRestart.ppsm C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A

Enumerates physical storage devices

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\GandCrab.exe

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\GandCrab.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1160 wrote to memory of 4540 N/A C:\Users\Admin\AppData\Local\Temp\GandCrab.exe C:\Windows\SysWOW64\cmd.exe
PID 1160 wrote to memory of 4540 N/A C:\Users\Admin\AppData\Local\Temp\GandCrab.exe C:\Windows\SysWOW64\cmd.exe
PID 1160 wrote to memory of 4540 N/A C:\Users\Admin\AppData\Local\Temp\GandCrab.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Users\Admin\AppData\Local\Temp\GandCrab.exe

"C:\Users\Admin\AppData\Local\Temp\GandCrab.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c vssadmin delete shadows /all /quiet

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1160 -ip 1160

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1160 -s 1432

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 www.kakaocorp.link udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 139.53.16.96.in-addr.arpa udp
US 8.8.8.8:53 79.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 14.173.189.20.in-addr.arpa udp

Files

memory/1160-1-0x00000000054D0000-0x00000000055D0000-memory.dmp

memory/1160-2-0x0000000000400000-0x000000000041B000-memory.dmp

F:\$RECYCLE.BIN\S-1-5-21-3906287020-2915474608-1755617787-1000\PQIBTG-MANUAL.txt

MD5 29f798f877b882fb52410a8e55cc1b3e
SHA1 645fa0880f8b2a4ecacf80eb73dd59ff4df0c1ae
SHA256 25449c881863f6543590ab5c40dc91f7588d66120e76a6c1e951881c93ebcb44
SHA512 32c9b23718790ceeb47be825983625402939511c789546ee30799139259fae2e82ed0a3041c1b8be5afb04b25a0cfa089d8abbd1fb8ee39ff8056ebde0955849

memory/1160-700-0x0000000000400000-0x00000000052B3000-memory.dmp

memory/1160-703-0x0000000000400000-0x000000000041B000-memory.dmp

memory/1160-702-0x0000000000400000-0x00000000052B3000-memory.dmp