gandcrab | 51586da87391a133fb2b8ee5d3baaae22a6e49393521d517bd5d3e1467be3ae6

General

Target
2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
Size 99KB
Sample240624-s69dcstbnl
SHA256 51586da87391a133fb2b8ee5d3baaae22a6e49393521d517bd5d3e1467be3ae6
MD5 21c98f764bfa9808773d1036549a2044
SHA1 a3fe0083439a948f50ef1f0962c2ecad66208ea5
SHA512 e812cb1e58e03b9e9e048337f314398390d9c0f252556e7fe0beba79d569664c8eed28e45cbf48a67da031a7b6bf19533bb9b1b61991f146e24a79f1fea1afd3
SSDEEP 3072:LMSjOnrmBIMqqDL2/mr3IdE8we0Avu5r++ygLIaaypQ8CrS6e:LXjOnr6jqqDL6aprYS6e
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

gandcrab backdoor persistence ransomware upx

Malware Config

Extracted

Family

gandcrab

C2

http://gdcbghvjyqy7jclk.onion.top/

Signatures

GandCrab payload 2 IoCs

resource	yara_rule
behavioral2/memory/640-0-0x0000000000F30000-0x0000000000F4C000-memory.dmp	family_gandcrab
behavioral2/memory/640-4-0x0000000000F30000-0x0000000000F4C000-memory.dmp	family_gandcrab

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

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/640-0-0x0000000000F30000-0x0000000000F4C000-memory.dmp	upx
behavioral2/memory/640-4-0x0000000000F30000-0x0000000000F4C000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\frswtcgwkmq = "C:\\Users\\Admin\\AppData\\Local\\Temp\\2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe"	2024-06-24_21c98f764bfa9808773d1036549a2044_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

description	ioc	Process
File opened (read-only)	\??\J:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\L:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\Z:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\T:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\V:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\G:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\H:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\N:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\P:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\Q:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\X:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\Y:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\I:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\M:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\R:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\U:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\W:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\S:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\A:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\B:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\E:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\K:	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
File opened (read-only)	\??\O:	2024-06-24_21c98f764bfa9808773d1036549a2044_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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 640 wrote to memory of 2484	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	80
PID 640 wrote to memory of 2484	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	80
PID 640 wrote to memory of 2484	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	80
PID 640 wrote to memory of 744	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	87
PID 640 wrote to memory of 744	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	87
PID 640 wrote to memory of 744	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	87
PID 640 wrote to memory of 4284	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	91
PID 640 wrote to memory of 4284	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	91
PID 640 wrote to memory of 4284	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	91
PID 640 wrote to memory of 4072	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	93
PID 640 wrote to memory of 4072	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	93
PID 640 wrote to memory of 4072	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	93
PID 640 wrote to memory of 3556	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	95
PID 640 wrote to memory of 3556	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	95
PID 640 wrote to memory of 3556	640	2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-06-24_21c98f764bfa9808773d1036549a2044_gandcrab.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-24_21c98f764bfa9808773d1036549a2044_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:640
- C:\Windows\SysWOW64\nslookup.exe
  nslookup nomoreransom.bit dns1.soprodns.ru
  2⤵
  PID:2484
- C:\Windows\SysWOW64\nslookup.exe
  nslookup emsisoft.bit dns1.soprodns.ru
  2⤵
  PID:744
- C:\Windows\SysWOW64\nslookup.exe
  nslookup gandcrab.bit dns1.soprodns.ru
  2⤵
  PID:4284
- C:\Windows\SysWOW64\nslookup.exe
  nslookup nomoreransom.bit dns1.soprodns.ru
  2⤵
  PID:4072
- C:\Windows\SysWOW64\nslookup.exe
  nslookup emsisoft.bit dns1.soprodns.ru
  2⤵
  PID:3556