gandcrab | 926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8

General

Target

926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
Size

229KB
MD5

7690677f01161894bb353b70304d1003
SHA1

1f9b22c0f3b0853af401179b7914efc23c8229d6
SHA256

926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8
SHA512

5b4c3938c8cc1df7720c73c8f0b136d10b14f564af92e04b991a2a3408fa0c9c5083920e345a0cda3d6dbb16135e15f79490a783133ec846620fc95b0682500b

Score

10^/10

gandcrab backdoor persistence ransomware

Malware Config

Signatures

GandCrab Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/368-61-0x00000000003C0000-0x00000000003D7000-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:

926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\ucnkryqlqkc = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\fklnfq.exe\""	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.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:

926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe

description	ioc	process
File opened (read-only)	\??\N:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\B:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\O:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\P:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\Q:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\Y:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\M:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\G:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\I:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\R:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\T:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\U:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\V:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\E:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\F:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\H:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\J:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\K:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\L:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\S:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\W:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\A:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\Z:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
File opened (read-only)	\??\X:	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

640 368 WerFault.exe 926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe

pid	pid_target	process	target process
640	368	WerFault.exe	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.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:

926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exeWerFault.exe

pid	process
368	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
368	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
640	WerFault.exe
640	WerFault.exe
640	WerFault.exe
640	WerFault.exe
640	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

WerFault.exe

pid process

640 WerFault.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 640 WerFault.exe

pid	process
640	WerFault.exe

description	pid	process
Token: SeDebugPrivilege	640	WerFault.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe

description	pid	process	target process
PID 368 wrote to memory of 640	368	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe	WerFault.exe
PID 368 wrote to memory of 640	368	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe	WerFault.exe
PID 368 wrote to memory of 640	368	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe	WerFault.exe
PID 368 wrote to memory of 640	368	926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe
"C:\Users\Admin\AppData\Local\Temp\926e9f7c35d87684a5a79d37da87fe932bd0f4c8cb1a58f47830004aa76e8eb8.exe"
1⤵
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 368 -s 764
2⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:640

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/368-59-0x0000000076661000-0x0000000076663000-memory.dmp

Filesize
8KB

Download
memory/368-60-0x0000000000400000-0x0000000000A4C000-memory.dmp

Filesize
6.3MB

Download
memory/368-61-0x00000000003C0000-0x00000000003D7000-memory.dmp

Filesize
92KB

Download
memory/640-62-0x0000000000000000-mapping.dmp

Download
memory/640-63-0x0000000000370000-0x0000000000371000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads