gandcrab | 8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7

General

Target

8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
Size

266KB
MD5

db32013afdedee1634b6d3578131cd1c
SHA1

2054914a21fd7137dff656a85fb1b850a3219510
SHA256

8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7
SHA512

f6138c0d20cb1413ddd0739d4a932609889e41bde258013b3994280784868734913a1e4db5fe656d7f5cbf1774cb4f09720882510ec64459d81b9513ff450475

Score

10^/10

gandcrab backdoor persistence ransomware

Malware Config

Signatures

GandCrab Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1084-62-0x0000000000220000-0x0000000000237000-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:

8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\yccnckpnvuk = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\rupmho.exe\""	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.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:

8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe

description	ioc	process
File opened (read-only)	\??\U:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\V:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\B:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\E:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\F:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\M:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\N:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\T:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\Z:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\Q:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\W:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\A:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\G:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\I:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\J:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\O:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\P:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\H:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\R:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\S:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\X:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\Y:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\K:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
File opened (read-only)	\??\L:	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1732 1084 WerFault.exe 8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe

pid	pid_target	process	target process
1732	1084	WerFault.exe	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.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:

8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exeWerFault.exe

pid	process
1084	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
1084	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
1732	WerFault.exe
1732	WerFault.exe
1732	WerFault.exe
1732	WerFault.exe
1732	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

WerFault.exe

pid process

1732 WerFault.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 1732 WerFault.exe

pid	process
1732	WerFault.exe

description	pid	process
Token: SeDebugPrivilege	1732	WerFault.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe

description	pid	process	target process
PID 1084 wrote to memory of 1732	1084	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe	WerFault.exe
PID 1084 wrote to memory of 1732	1084	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe	WerFault.exe
PID 1084 wrote to memory of 1732	1084	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe	WerFault.exe
PID 1084 wrote to memory of 1732	1084	8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe
"C:\Users\Admin\AppData\Local\Temp\8fd5a6c8b2bd6a9aad499d09f69f44fd1c90326c5cbe94b82dc637cf7e57ace7.exe"
1⤵
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1084

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1084 -s 768
2⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:1732

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/1084-60-0x00000000752F1000-0x00000000752F3000-memory.dmp

Filesize
8KB

Download
memory/1084-61-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/1084-62-0x0000000000220000-0x0000000000237000-memory.dmp

Filesize
92KB

Download
memory/1732-63-0x0000000000000000-mapping.dmp

Download
memory/1732-64-0x0000000000330000-0x0000000000331000-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