gandcrab | f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c

General

Target

f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
Size

229KB
MD5

d0ad1509cda862e6c3d86a2989748003
SHA1

a1d2a91ad0cb1419bfb663a67abbc340f4806eb1
SHA256

f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c
SHA512

4665e360c9d369d821c9ff93173c812db6ae9297746434ad17a9f3c8f8826ae8e2c201259ccf125d1e014d7eeae0fe4ac3be309d93fe9dff8bc08de150975f09

Score

10^/10

gandcrab backdoor persistence ransomware

Malware Config

Signatures

GandCrab Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1616-61-0x00000000003A0000-0x00000000003B7000-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:

f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\qcxirpmfpsb = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\zvrlaf.exe\""	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.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:

f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe

description	ioc	process
File opened (read-only)	\??\I:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\J:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\Z:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\G:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\H:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\U:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\M:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\N:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\S:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\T:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\W:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\A:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\E:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\F:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\O:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\P:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\Q:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\R:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\V:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\B:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\K:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\L:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\X:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\Y:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

844 1616 WerFault.exe f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe

pid	pid_target	process	target process
844	1616	WerFault.exe	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.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:

f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exeWerFault.exe

pid	process
1616	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
1616	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
844	WerFault.exe
844	WerFault.exe
844	WerFault.exe
844	WerFault.exe
844	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

WerFault.exe

pid process

844 WerFault.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 844 WerFault.exe

pid	process
844	WerFault.exe

description	pid	process
Token: SeDebugPrivilege	844	WerFault.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe

description	pid	process	target process
PID 1616 wrote to memory of 844	1616	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe	WerFault.exe
PID 1616 wrote to memory of 844	1616	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe	WerFault.exe
PID 1616 wrote to memory of 844	1616	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe	WerFault.exe
PID 1616 wrote to memory of 844	1616	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
"C:\Users\Admin\AppData\Local\Temp\f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe"
1⤵
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1616

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1616 -s 780
2⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:844

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

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Downloads

memory/844-62-0x0000000000000000-mapping.dmp

Download
memory/844-63-0x00000000002D0000-0x00000000002D1000-memory.dmp

Filesize
4KB

Download
memory/1616-59-0x0000000075631000-0x0000000075633000-memory.dmp

Filesize
8KB

Download
memory/1616-60-0x0000000000400000-0x0000000000A4C000-memory.dmp

Filesize
6.3MB

Download
memory/1616-61-0x00000000003A0000-0x00000000003B7000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads