gandcrab | aca0b96126c813b0d29d6fbff9175f8ca62ff2ec6eed83bff76a73ae717cfcb8

General

Target

aca0b96126c813b0d29d6fbff9175f8ca62ff2ec6eed83bff76a73ae717cfcb8.dll
Size

131KB
MD5

1ef3f352d97ba827f446f6e8708aa054
SHA1

eb910b00ff92247044ae7c3006c8946b912f798b
SHA256

aca0b96126c813b0d29d6fbff9175f8ca62ff2ec6eed83bff76a73ae717cfcb8
SHA512

cc58d395b38fe2908a5a6c58ef8a53eadf434ef27eafed19f6564d9cad04761575e0d8c0d1d68a5ee94edf066365d7fee2737c0e76ee4326c73dfee1c7f6b91d

Score

10^/10

gandcrab backdoor ransomware

Malware Config

Extracted

Path

C:\MWVYCU-DECRYPT.txt

Ransom Note

---= GANDCRAB V5.0.4 =--- ***********************UNDER NO CIRCUMSTANCES DO NOT DELETE THIS FILE, UNTIL ALL YOUR DATA IS RECOVERED*********************** *****FAILING TO DO SO, WILL RESULT IN YOUR SYSTEM CORRUPTION, IF THERE ARE DECRYPTION ERRORS***** Attention! All your files, documents, photos, databases and other important files are encrypted and have the extension: .MWVYCU The only method of recovering files is to purchase an unique private key. Only we can give you this key and only we can recover your files. The server with your key is in a closed network TOR. You can get there by the following ways: ---------------------------------------------------------------------------------------- | 0. Download Tor browser - https://www.torproject.org/ | 1. Install Tor browser | 2. Open Tor Browser | 3. Open link in TOR browser: http://gandcrabmfe6mnef.onion/7ef9cdc3f8338a58 | 4. Follow the instructions on this page ---------------------------------------------------------------------------------------- On our page you will see instructions on payment and get the opportunity to decrypt 1 file for free. ATTENTION! IN ORDER TO PREVENT DATA DAMAGE: * DO NOT MODIFY ENCRYPTED FILES * DO NOT CHANGE DATA BELOW ---BEGIN GANDCRAB KEY--- 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 ---END GANDCRAB KEY--- ---BEGIN PC DATA--- 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 ---END PC DATA---

URLs

http://gandcrabmfe6mnef.onion/7ef9cdc3f8338a58

Signatures

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

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:

rundll32.exe

description	ioc	process
File opened (read-only)	\??\Z:	rundll32.exe
File opened (read-only)	\??\B:	rundll32.exe
File opened (read-only)	\??\G:	rundll32.exe
File opened (read-only)	\??\H:	rundll32.exe
File opened (read-only)	\??\O:	rundll32.exe
File opened (read-only)	\??\X:	rundll32.exe
File opened (read-only)	\??\Y:	rundll32.exe
File opened (read-only)	\??\A:	rundll32.exe
File opened (read-only)	\??\J:	rundll32.exe
File opened (read-only)	\??\L:	rundll32.exe
File opened (read-only)	\??\N:	rundll32.exe
File opened (read-only)	\??\P:	rundll32.exe
File opened (read-only)	\??\Q:	rundll32.exe
File opened (read-only)	\??\E:	rundll32.exe
File opened (read-only)	\??\F:	rundll32.exe
File opened (read-only)	\??\I:	rundll32.exe
File opened (read-only)	\??\K:	rundll32.exe
File opened (read-only)	\??\S:	rundll32.exe
File opened (read-only)	\??\W:	rundll32.exe
File opened (read-only)	\??\M:	rundll32.exe
File opened (read-only)	\??\R:	rundll32.exe
File opened (read-only)	\??\T:	rundll32.exe
File opened (read-only)	\??\U:	rundll32.exe
File opened (read-only)	\??\V:	rundll32.exe

Drops file in Program Files directory 10 IoCs

Processes:

rundll32.exe

description	ioc	process
File opened for modification	C:\Program Files\ConnectExpand.m4a	rundll32.exe
File opened for modification	C:\Program Files\ConvertCompare.xlsb	rundll32.exe
File created	C:\Program Files\MWVYCU-DECRYPT.txt	rundll32.exe
File created	C:\Program Files\f8338dbbf8338a5f214.lock	rundll32.exe
File opened for modification	C:\Program Files\AddShow.kix	rundll32.exe
File opened for modification	C:\Program Files\CheckpointGet.M2T	rundll32.exe
File opened for modification	C:\Program Files\CompleteSwitch.vssm	rundll32.exe
File opened for modification	C:\Program Files\ConfirmStart.xps	rundll32.exe
File opened for modification	C:\Program Files\ConvertToJoin.wax	rundll32.exe
File opened for modification	C:\Program Files\DebugRepair.ex_	rundll32.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

708 592 WerFault.exe rundll32.exe

pid	pid_target	process	target process
708	592	WerFault.exe	rundll32.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:

rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	rundll32.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

rundll32.exeWerFault.exe

pid process

592 rundll32.exe
592 rundll32.exe
708 WerFault.exe
708 WerFault.exe
708 WerFault.exe
708 WerFault.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

WerFault.exe

pid process

708 WerFault.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 708 WerFault.exe

pid	process
592	rundll32.exe
592	rundll32.exe
708	WerFault.exe
708	WerFault.exe
708	WerFault.exe
708	WerFault.exe

pid	process
708	WerFault.exe

description	pid	process
Token: SeDebugPrivilege	708	WerFault.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1364 wrote to memory of 592	1364	rundll32.exe	rundll32.exe
PID 1364 wrote to memory of 592	1364	rundll32.exe	rundll32.exe
PID 1364 wrote to memory of 592	1364	rundll32.exe	rundll32.exe
PID 1364 wrote to memory of 592	1364	rundll32.exe	rundll32.exe
PID 1364 wrote to memory of 592	1364	rundll32.exe	rundll32.exe
PID 1364 wrote to memory of 592	1364	rundll32.exe	rundll32.exe
PID 1364 wrote to memory of 592	1364	rundll32.exe	rundll32.exe
PID 592 wrote to memory of 708	592	rundll32.exe	WerFault.exe
PID 592 wrote to memory of 708	592	rundll32.exe	WerFault.exe
PID 592 wrote to memory of 708	592	rundll32.exe	WerFault.exe
PID 592 wrote to memory of 708	592	rundll32.exe	WerFault.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\aca0b96126c813b0d29d6fbff9175f8ca62ff2ec6eed83bff76a73ae717cfcb8.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1364

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\aca0b96126c813b0d29d6fbff9175f8ca62ff2ec6eed83bff76a73ae717cfcb8.dll,#1
2⤵
- Enumerates connected drives
- Drops file in Program Files directory
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 592 -s 280
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:708

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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/592-54-0x00000000766D1000-0x00000000766D3000-memory.dmp

Filesize
8KB

Download
memory/708-56-0x0000000000790000-0x00000000007F0000-memory.dmp

Filesize
384KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads