gandcrab | 89c8a67386416db110395e58fac703ac811811d5f1a7be1e21854ef42215357d

General

Target

2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
Size

351KB
MD5

44a850d2b6b9742916cd194d7a199ec3
SHA1

00b8c6cee5f93f4790480b58dacb6b6b0ab754ec
SHA256

89c8a67386416db110395e58fac703ac811811d5f1a7be1e21854ef42215357d
SHA512

8eb7ac2b726f85c96f94efc5bd23c3c0a2887d33c02667afe4250a2d82a8a1052f9232f60a3a925234d6ce6df380cedc8d159d60ebf97da3b3b48030182a1d68
SSDEEP

3072:1pNMs+Kr1wbWGjl0xjsNNeVKBNVBxKT46xl+wndfIQQOaC3QBn7/hsb2BhGZ1/Nb:1pNMsLWEjsXjBATRpuuwnGD/Nj6a

Score

10^/10

gandcrab backdoor persistence ransomware

Malware Config

Signatures

GandCrab payload 3 IoCs

resource	yara_rule
behavioral2/memory/1680-3-0x0000000000400000-0x00000000012D6000-memory.dmp	family_gandcrab
behavioral2/memory/1680-4-0x0000000002F00000-0x0000000002F17000-memory.dmp	family_gandcrab
behavioral2/memory/1680-11-0x0000000002F00000-0x0000000002F17000-memory.dmp	family_gandcrab

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

Detects Reflective DLL injection artifacts 3 IoCs

resource	yara_rule
behavioral2/memory/1680-3-0x0000000000400000-0x00000000012D6000-memory.dmp	INDICATOR_SUSPICIOUS_ReflectiveLoader
behavioral2/memory/1680-4-0x0000000002F00000-0x0000000002F17000-memory.dmp	INDICATOR_SUSPICIOUS_ReflectiveLoader
behavioral2/memory/1680-11-0x0000000002F00000-0x0000000002F17000-memory.dmp	INDICATOR_SUSPICIOUS_ReflectiveLoader

Detects ransomware indicator 2 IoCs

resource	yara_rule
behavioral2/memory/1680-4-0x0000000002F00000-0x0000000002F17000-memory.dmp	SUSP_RANSOMWARE_Indicator_Jul20
behavioral2/memory/1680-11-0x0000000002F00000-0x0000000002F17000-memory.dmp	SUSP_RANSOMWARE_Indicator_Jul20

Gandcrab Payload 3 IoCs

resource	yara_rule
behavioral2/memory/1680-3-0x0000000000400000-0x00000000012D6000-memory.dmp	Gandcrab
behavioral2/memory/1680-4-0x0000000002F00000-0x0000000002F17000-memory.dmp	Gandcrab
behavioral2/memory/1680-11-0x0000000002F00000-0x0000000002F17000-memory.dmp	Gandcrab

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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\jcfprqjavzz = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\efjrnz.exe\""	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.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)	\??\G:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\I:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\K:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\M:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\P:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\T:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\V:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\A:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\H:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\J:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\R:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\S:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\B:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\L:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\N:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\W:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\Y:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\E:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\Q:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\U:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\X:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\Z:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
File opened (read-only)	\??\O:	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3716	1680	WerFault.exe	82

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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1680	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
1680	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
1680	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
1680	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1680 wrote to memory of 4988	1680	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe	83
PID 1680 wrote to memory of 4988	1680	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe	83
PID 1680 wrote to memory of 4988	1680	2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-17_44a850d2b6b9742916cd194d7a199ec3_mafia.exe"
1⤵
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1680
- C:\Windows\SysWOW64\nslookup.exe
  nslookup carder.bit ns1.wowservers.ru
  2⤵
  PID:4988
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1680 -s 1372
  2⤵
  - Program crash
  PID:3716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1680 -ip 1680
1⤵
PID:3184

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1680-1-0x0000000001420000-0x0000000001520000-memory.dmp

Filesize
1024KB

Download
memory/1680-2-0x0000000000400000-0x00000000012D6000-memory.dmp

Filesize
14.8MB

Download
memory/1680-3-0x0000000000400000-0x00000000012D6000-memory.dmp

Filesize
14.8MB

Download
memory/1680-4-0x0000000002F00000-0x0000000002F17000-memory.dmp

Filesize
92KB

Download
memory/1680-11-0x0000000002F00000-0x0000000002F17000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads