gandcrab | 50a63379f799e5b85c641fa68515825c54e2d91f386715a3efc11ce1a236a661

General

Target

new.exe
Size

1.9MB
MD5

68452d35af58fc91e8d9d626f841232a
SHA1

15257211e4e781ca77148cc5106dd8fd344e945c
SHA256

50a63379f799e5b85c641fa68515825c54e2d91f386715a3efc11ce1a236a661
SHA512

57ec3a19b54513600996933b2664b76a1200765aca2258ef56323a650e474673f548dc224ab8bf316c06911c80f225ea1b58b401a22679c1763ad7094146f34e

Score

10^/10

gandcrab backdoor ransomware suricata

Malware Config

Extracted

Path

C:\AVCYKIQEGU-DECRYPT.txt

Ransom Note

---= GANDCRAB V5.0.3 =--- ***********************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 WILL BE DECRYPTION ERRORS***** Attention! All your files, documents, photos, databases and other important files are encrypted and have the extension: .AVCYKIQEGU 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/eccb2a34b2a0306 | 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/eccb2a34b2a0306

Signatures

GandCrab Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/4868-132-0x0000000000400000-0x0000000000428000-memory.dmp	family_gandcrab

Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
ransomware backdoor gandcrab
suricata: ET MALWARE [eSentire] Win32/GandCrab v4/5 Ransomware CnC Activity
suricata: ET MALWARE [eSentire] Win32/GandCrab v4/5 Ransomware CnC Activity
suricata
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Modifies extensions of user files 3 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

wermgr.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\ProtectAdd.png => C:\Users\Admin\Pictures\ProtectAdd.png.avcykiqegu	wermgr.exe
File renamed	C:\Users\Admin\Pictures\RegisterUpdate.tif => C:\Users\Admin\Pictures\RegisterUpdate.tif.avcykiqegu	wermgr.exe
File renamed	C:\Users\Admin\Pictures\RestartResize.crw => C:\Users\Admin\Pictures\RestartResize.crw.avcykiqegu	wermgr.exe

Drops startup file 2 IoCs

Processes:

wermgr.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\4b2a04e54b2a030729.lock	wermgr.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\AVCYKIQEGU-DECRYPT.txt	wermgr.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:

wermgr.exe

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

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

wermgr.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\\\pidor.bmp"	wermgr.exe

Drops file in Program Files directory 25 IoCs

Processes:

wermgr.exe

description	ioc	process
File opened for modification	C:\Program Files\DisableConvertTo.js	wermgr.exe
File opened for modification	C:\Program Files\ExportUnlock.ttc	wermgr.exe
File opened for modification	C:\Program Files\RemoveRename.vsdm	wermgr.exe
File opened for modification	C:\Program Files\RenameGrant.png	wermgr.exe
File opened for modification	C:\Program Files\WaitMerge.ini	wermgr.exe
File created	C:\Program Files\4b2a04e54b2a030729.lock	wermgr.exe
File opened for modification	C:\Program Files\BackupProtect.mhtml	wermgr.exe
File opened for modification	C:\Program Files\SendRestart.DVR-MS	wermgr.exe
File opened for modification	C:\Program Files\UpdateInstall.edrwx	wermgr.exe
File opened for modification	C:\Program Files\ClearSplit.wma	wermgr.exe
File opened for modification	C:\Program Files\InvokeWrite.xsl	wermgr.exe
File opened for modification	C:\Program Files\PublishOut.wdp	wermgr.exe
File opened for modification	C:\Program Files\ShowStop.vb	wermgr.exe
File opened for modification	C:\Program Files\SuspendStart.xps	wermgr.exe
File opened for modification	C:\Program Files\UnprotectWait.mov	wermgr.exe
File created	C:\Program Files (x86)\4b2a04e54b2a030729.lock	wermgr.exe
File opened for modification	C:\Program Files\DismountReset.wax	wermgr.exe
File opened for modification	C:\Program Files\OptimizeUnpublish.ods	wermgr.exe
File opened for modification	C:\Program Files\ResetSelect.xsl	wermgr.exe
File opened for modification	C:\Program Files\SelectSet.mpe	wermgr.exe
File opened for modification	C:\Program Files\SplitStop.txt	wermgr.exe
File opened for modification	C:\Program Files\WaitSubmit.aiff	wermgr.exe
File created	C:\Program Files (x86)\AVCYKIQEGU-DECRYPT.txt	wermgr.exe
File created	C:\Program Files\AVCYKIQEGU-DECRYPT.txt	wermgr.exe
File opened for modification	C:\Program Files\FormatWrite.shtml	wermgr.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:

wermgr.exe

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

wermgr.exe

pid process

4868 wermgr.exe
4868 wermgr.exe
4868 wermgr.exe
4868 wermgr.exe

pid	process
4868	wermgr.exe
4868	wermgr.exe
4868	wermgr.exe
4868	wermgr.exe

Suspicious use of AdjustPrivilegeToken 45 IoCs

Processes:

wmic.exevssvc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	2980	wmic.exe
Token: SeSecurityPrivilege	2980	wmic.exe
Token: SeTakeOwnershipPrivilege	2980	wmic.exe
Token: SeLoadDriverPrivilege	2980	wmic.exe
Token: SeSystemProfilePrivilege	2980	wmic.exe
Token: SeSystemtimePrivilege	2980	wmic.exe
Token: SeProfSingleProcessPrivilege	2980	wmic.exe
Token: SeIncBasePriorityPrivilege	2980	wmic.exe
Token: SeCreatePagefilePrivilege	2980	wmic.exe
Token: SeBackupPrivilege	2980	wmic.exe
Token: SeRestorePrivilege	2980	wmic.exe
Token: SeShutdownPrivilege	2980	wmic.exe
Token: SeDebugPrivilege	2980	wmic.exe
Token: SeSystemEnvironmentPrivilege	2980	wmic.exe
Token: SeRemoteShutdownPrivilege	2980	wmic.exe
Token: SeUndockPrivilege	2980	wmic.exe
Token: SeManageVolumePrivilege	2980	wmic.exe
Token: 33	2980	wmic.exe
Token: 34	2980	wmic.exe
Token: 35	2980	wmic.exe
Token: 36	2980	wmic.exe
Token: SeIncreaseQuotaPrivilege	2980	wmic.exe
Token: SeSecurityPrivilege	2980	wmic.exe
Token: SeTakeOwnershipPrivilege	2980	wmic.exe
Token: SeLoadDriverPrivilege	2980	wmic.exe
Token: SeSystemProfilePrivilege	2980	wmic.exe
Token: SeSystemtimePrivilege	2980	wmic.exe
Token: SeProfSingleProcessPrivilege	2980	wmic.exe
Token: SeIncBasePriorityPrivilege	2980	wmic.exe
Token: SeCreatePagefilePrivilege	2980	wmic.exe
Token: SeBackupPrivilege	2980	wmic.exe
Token: SeRestorePrivilege	2980	wmic.exe
Token: SeShutdownPrivilege	2980	wmic.exe
Token: SeDebugPrivilege	2980	wmic.exe
Token: SeSystemEnvironmentPrivilege	2980	wmic.exe
Token: SeRemoteShutdownPrivilege	2980	wmic.exe
Token: SeUndockPrivilege	2980	wmic.exe
Token: SeManageVolumePrivilege	2980	wmic.exe
Token: 33	2980	wmic.exe
Token: 34	2980	wmic.exe
Token: 35	2980	wmic.exe
Token: 36	2980	wmic.exe
Token: SeBackupPrivilege	4324	vssvc.exe
Token: SeRestorePrivilege	4324	vssvc.exe
Token: SeAuditPrivilege	4324	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

new.exewermgr.exe

description	pid	process	target process
PID 5012 wrote to memory of 4868	5012	new.exe	wermgr.exe
PID 5012 wrote to memory of 4868	5012	new.exe	wermgr.exe
PID 5012 wrote to memory of 4868	5012	new.exe	wermgr.exe
PID 5012 wrote to memory of 4868	5012	new.exe	wermgr.exe
PID 5012 wrote to memory of 4868	5012	new.exe	wermgr.exe
PID 4868 wrote to memory of 2980	4868	wermgr.exe	wmic.exe
PID 4868 wrote to memory of 2980	4868	wermgr.exe	wmic.exe
PID 4868 wrote to memory of 2980	4868	wermgr.exe	wmic.exe

C:\Users\Admin\AppData\Local\Temp\new.exe
"C:\Users\Admin\AppData\Local\Temp\new.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5012

C:\Windows\SysWOW64\wermgr.exe
"C:\Windows\System32\wermgr.exe"
2⤵
- Modifies extensions of user files
- Drops startup file
- Enumerates connected drives
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4868

C:\Windows\SysWOW64\wbem\wmic.exe
"C:\Windows\system32\wbem\wmic.exe" shadowcopy delete
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:2980

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4324

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File Deletion

1

T1107

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

Inhibit System Recovery

1

T1490

Defacement

1

T1491

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Downloads

memory/2980-134-0x0000000000000000-mapping.dmp

Download
memory/4868-131-0x0000000000000000-mapping.dmp

Download
memory/4868-132-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/5012-130-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads