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
behavioral2/memory/3212-115-0x0000000000BB0000-0x0000000000BC7000-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
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\wxavbhzlffc = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\bggwhn.exe\""	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)	\??\N:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\P:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\X:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\Z:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\E:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\Q:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\S:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\T:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\U:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\W:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\M:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\A:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\B:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\G:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\H:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\I:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\K:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\L:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\O:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\R:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\Y:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\F:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\J:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
File opened (read-only)	\??\V:	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3424 3212 WerFault.exe f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe

pid	pid_target	process	target process
3424	3212	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 19 IoCs

Processes:

f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exeWerFault.exe

pid	process
3212	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
3212	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
3212	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
3212	f4bc9196dc7eb796af047f8655fab607d910ecfd4ba2eeadd9ea931fdda9498c.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe
3424	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 3424 WerFault.exe
Token: SeBackupPrivilege 3424 WerFault.exe
Token: SeDebugPrivilege 3424 WerFault.exe

description	pid	process
Token: SeRestorePrivilege	3424	WerFault.exe
Token: SeBackupPrivilege	3424	WerFault.exe
Token: SeDebugPrivilege	3424	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
PID:3212

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3212 -s 1248
2⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3424

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/3212-114-0x0000000000400000-0x0000000000A4C000-memory.dmp

Filesize
6.3MB

Download
memory/3212-115-0x0000000000BB0000-0x0000000000BC7000-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