gandcrab | 44f8c2af957934e1055be8ae7029f832925e5c6b0848b6a57f2e009bd006c228

General

Target

2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
Size

145KB
MD5

a725be849a4037c873f4debec557d055
SHA1

6e75cc89f0632936d1754d926ce9ffe9125d49b7
SHA256

44f8c2af957934e1055be8ae7029f832925e5c6b0848b6a57f2e009bd006c228
SHA512

e0c4a3200be29acadc15351a1b5f08c7d41bf669a7a270edb9a6fab67b394ec8b39d4e01bf7119dc121505f1ad26b5ac567899b4f9ce9548c0d79fae53b70736
SSDEEP

3072:1YHVHd2NCMqqDL2/mr3IdE8we0Avu5r++ygLIaagvdCjRv9OtN:1yOqqDL64vdGREz

Score

10^/10

gandcrab backdoor persistence ransomware

Malware Config

Signatures

GandCrab payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/440-0-0x0000000000400000-0x0000000000428000-memory.dmp	family_gandcrab
behavioral2/memory/440-4-0x0000000000400000-0x0000000000428000-memory.dmp	family_gandcrab

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

Detects ransomware indicator 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/440-0-0x0000000000400000-0x0000000000428000-memory.dmp	SUSP_RANSOMWARE_Indicator_Jul20
behavioral2/memory/440-4-0x0000000000400000-0x0000000000428000-memory.dmp	SUSP_RANSOMWARE_Indicator_Jul20

Gandcrab Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/440-0-0x0000000000400000-0x0000000000428000-memory.dmp	Gandcrab
behavioral2/memory/440-4-0x0000000000400000-0x0000000000428000-memory.dmp	Gandcrab

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\rdultbohzbs = "C:\\Users\\Admin\\AppData\\Local\\Temp\\2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe"	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe

Enumerates connected drives 3 TTPs 23 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:

2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe

description	ioc	process
File opened (read-only)	\??\O:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\W:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\Y:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\Z:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\B:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\E:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\H:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\K:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\P:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\R:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\T:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\U:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\A:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\G:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\J:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\Q:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\V:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\X:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\I:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\L:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\N:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\M:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
File opened (read-only)	\??\S:	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.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:

2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe

pid	process
440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe

description	pid	process	target process
PID 440 wrote to memory of 4556	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 4556	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 4556	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 3772	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 3772	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 3772	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 4176	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 4176	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 4176	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 1664	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 1664	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 1664	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 804	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 804	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe
PID 440 wrote to memory of 804	440	2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe	nslookup.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_a725be849a4037c873f4debec557d055_gandcrab.exe"
1⤵
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:440

C:\Windows\SysWOW64\nslookup.exe
nslookup nomoreransom.bit dns1.soprodns.ru
2⤵
PID:4556

C:\Windows\SysWOW64\nslookup.exe
nslookup emsisoft.bit dns1.soprodns.ru
2⤵
PID:3772

C:\Windows\SysWOW64\nslookup.exe
nslookup gandcrab.bit dns1.soprodns.ru
2⤵
PID:4176

C:\Windows\SysWOW64\nslookup.exe
nslookup nomoreransom.bit dns1.soprodns.ru
2⤵
PID:1664

C:\Windows\SysWOW64\nslookup.exe
nslookup emsisoft.bit dns1.soprodns.ru
2⤵
PID:804

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

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

Resource Development

Reconnaissance

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Downloads

memory/440-0-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/440-4-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads