gandcrab | f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb

General

Target

f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
Size

267KB
MD5

02d9b29c62f71876b760b51204243e0e
SHA1

230827930ba3fc4617e40165a0ed80484d910166
SHA256

f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb
SHA512

87aa7c2644cb9faca39fa3c23ae85d518eac02ef95b602cba1f9f4861c723e2958f79bc5b5570b345a1956344ebeb7f21299908f86b301786ce0cc01f2b6f345

Score

10^/10

gandcrab backdoor persistence ransomware

Malware Config

Signatures

GandCrab Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1104-62-0x0000000000220000-0x0000000000237000-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:

f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\phrfuczbhfe = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\ulvzef.exe\""	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.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:

f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe

description	ioc	process
File opened (read-only)	\??\Z:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\L:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\V:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\X:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\Y:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\B:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\Q:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\S:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\P:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\E:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\G:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\M:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\O:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\J:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\K:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\N:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\R:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\A:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\F:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\H:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\I:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\T:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\U:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
File opened (read-only)	\??\W:	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

292 1104 WerFault.exe f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe

pid	pid_target	process	target process
292	1104	WerFault.exe	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.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:

f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exeWerFault.exe

pid	process
1104	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
1104	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
292	WerFault.exe
292	WerFault.exe
292	WerFault.exe
292	WerFault.exe
292	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

WerFault.exe

pid process

292 WerFault.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 292 WerFault.exe

pid	process
292	WerFault.exe

description	pid	process
Token: SeDebugPrivilege	292	WerFault.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe

description	pid	process	target process
PID 1104 wrote to memory of 292	1104	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe	WerFault.exe
PID 1104 wrote to memory of 292	1104	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe	WerFault.exe
PID 1104 wrote to memory of 292	1104	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe	WerFault.exe
PID 1104 wrote to memory of 292	1104	f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe
"C:\Users\Admin\AppData\Local\Temp\f13c477ae96c78a1aac0505b461fa37a900362c065bff74f49f50a4456d546bb.exe"
1⤵
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1104 -s 772
2⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:292

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/292-63-0x0000000000000000-mapping.dmp

Download
memory/292-64-0x0000000000440000-0x0000000000441000-memory.dmp

Filesize
4KB

Download
memory/1104-60-0x0000000076E11000-0x0000000076E13000-memory.dmp

Filesize
8KB

Download
memory/1104-61-0x0000000000400000-0x000000000055A000-memory.dmp

Filesize
1.4MB

Download
memory/1104-62-0x0000000000220000-0x0000000000237000-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