gandcrab | 67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce

General

Target

67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
Size

265KB
MD5

cd407d5e1996236af9fd4ce37cbe9f86
SHA1

7b5b3c7bf18d8dd0d66660f92d1a16cfb395adf2
SHA256

67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce
SHA512

cd06b3b3c0dd3c03849cd63dfe36568ba9eeff37935217ad2836405bc2b4601463eee008a4279f732e69ff3cace8a84cec18f8f777f1ad4cc6a66e8b1a1cedc5

Score

10^/10

gandcrab backdoor persistence ransomware

Malware Config

Signatures

GandCrab Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1888-62-0x0000000000220000-0x0000000000237000-memory.dmp	family_gandcrab

Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
ransomware backdoor gandcrab

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\ydqmphjykei = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\hoptmk.exe\""	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe

Enumerates connected drives 3 TTPs 24 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe

description	ioc	process
File opened (read-only)	\??\F:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\G:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\S:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\W:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\X:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\E:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\I:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\N:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\O:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\P:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\T:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\V:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\H:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\J:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\Q:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\U:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\Y:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\Z:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\A:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\B:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\K:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\L:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\M:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
File opened (read-only)	\??\R:	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

556 1888 WerFault.exe 67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe

pid	pid_target	process	target process
556	1888	WerFault.exe	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exeWerFault.exe

pid	process
1888	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
1888	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
556	WerFault.exe
556	WerFault.exe
556	WerFault.exe
556	WerFault.exe
556	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

WerFault.exe

pid process

556 WerFault.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 556 WerFault.exe

pid	process
556	WerFault.exe

description	pid	process
Token: SeDebugPrivilege	556	WerFault.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe

description	pid	process	target process
PID 1888 wrote to memory of 556	1888	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe	WerFault.exe
PID 1888 wrote to memory of 556	1888	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe	WerFault.exe
PID 1888 wrote to memory of 556	1888	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe	WerFault.exe
PID 1888 wrote to memory of 556	1888	67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe
"C:\Users\Admin\AppData\Local\Temp\67c0a4aa81cd4d2ec7f8d0a891add357f070e3bd95ae02eb2d1c31a98e3fe7ce.exe"
1⤵
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1888

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1888 -s 764
2⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:556

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/556-63-0x0000000000000000-mapping.dmp

Download
memory/556-64-0x0000000000390000-0x00000000003F0000-memory.dmp

Filesize
384KB

Download
memory/1888-60-0x0000000075161000-0x0000000075163000-memory.dmp

Filesize
8KB

Download
memory/1888-62-0x0000000000220000-0x0000000000237000-memory.dmp

Filesize
92KB

Download
memory/1888-61-0x0000000000400000-0x000000000055A000-memory.dmp

Filesize
1.4MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads