gandcrab | 933210a9d19b25e0711ae88eece1ba06bb035a01ab2880cc707ff55bdd3b8dd0

General

Target

933210a9d19b25e0711ae88eece1ba06bb035a01ab2880cc707ff55bdd3b8dd0.dll
Size

130KB
MD5

0b33e34e26c6e53c346517edd3dd9841
SHA1

cc96c9bf2226aacc5064fed104bc173dc09ddd6b
SHA256

933210a9d19b25e0711ae88eece1ba06bb035a01ab2880cc707ff55bdd3b8dd0
SHA512

d58df66c4192d1f734b28a28296d08037fb74fb01bbf6bb3761079850370ffe8288602882142636604ec9cc7d0b89ac9e4fc46fb280cb4fe8c9f23e1c219c4e2

Score

10^/10

gandcrab backdoor ransomware

Malware Config

Extracted

Path

C:\JLNIACJJK-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: .JLNIACJJK 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/d28bd0f830f133 | 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--- lAQAAFUMrhjAKLHEZ6FoLzRVq+NthkNIRR+SWJSYqFx9mTD/Uj/bKA+SeozsaXoT41co4fLEjPPMTaC9pVFTDg2l76VzYL/hAjjQvRh3NXRuZ2ZnJHtgn662wohkPzbYd9XFOeEPNx56i+7RPdG/hkyDdmgvPQ7zQNYb2qleD4H483k2gcsc/q3WafTgaRNc08yoePN5ZKJP1AuXXLzrHXpwU3+H20+xl3gA65Z/bfnJ1BIwGlK1EFWND9ityG6uLn0wQvlqDwKAzax7adX46BwRHybyX5uJc0MRWbircRd9mUvYATZjlVut56KYZ4f3BXTh57NVAy2Qs3GMpgubQ+0n9x7/PReQbu00wiNNZUDIrCWUU68z+bz+Get4BiRUK0d7gF5r8A5u/14aMZaoIePh3Mkz++TOK9+gzV+4X1CDZ0rCzVIwlSADUtIDlnLVxRR2vVJ8RCkeEnD8fC2YFpijs3waFlF+rt+FF+zDj9Mw4zHDXBc8IhTt6cBUQSOua2kWlJrHHJj4Nv9IkubMGYPzQqy1cgZeebp8KVPtJVfaatt8Of64pt4ic8sSvIJfkwFlE/6enNC/gZKCY4n3tnT3qa7Qqt3cClDXtQZgdseZv9L4W+4ZAsr4N1K9Z29F3/jgD405p4L4sTtNhaJ2djINkQJasF3QnXZnOOUpqb+78FQkHjrddjK1MyOnkDJmv9GW5bzKKGTdR7Rdaakt48UsMopx5gQBg70SKN/Dp74tfJODIRkoTNPdKBpibf0X3nfU6di/DPpvgrumc+3Se3RFe3U7U3saSE+yixYr+GpwxInnc8UffF6zgWd1WtOhJMqSNg8yenQpo807rgxyCMRZTWAwmwrf5le9CFQ/O2u3tmybkzxbdoPe3lTgB4KD7qQ3Ea0dwuU6oDnpaB9GUV7GQson6NKp8bJSvXeuEYpdX0RxpRMhz2F/PmpcKtV0kyfp30yhV0Dvm0MH4CKi3Q8y2zsyzVkANZa4WdDqyhJLOv0PnadOlmjdTG0s6yzRlIy+JB4LJeEaLRVm91M8VIyGoolAJKHDACzQ+6Cq6UHCOSsiEE6+i2dBgk2iWravB48U+t6dPFrrw3ORqe8NaeqXM4C0wKTnj3y3StITAAW80eSoXQe7rW4MTjEjXXZW+m/WHgQNT92kbfYPv9WMpdO6VAlEGJEurhUyUBfYOKFVJvpPQsb74RSeWdtv2URDd2A0FgpApG1uy9MqEUSZBavJW2Gs58Aw1Y8pa8xF4oUeE6zK7Va5wWM6yDz3si//qFISjZdDbHAtz9MiPZex/9JUTT2Iivq2rHBmd4PvT5YFQF7v3NmlpespLOY5i0lPgcuejEDVHzrazE/u0MEz3atjZhUus5E4MFd2wdN33dypPY+Y6r2mcJ8sHhAWDoLPmkgmQVrZWAy9lNAVeni1vhTXz8uYTIVRQoXQNgUcqBVKXLuVblPSXhxGXY1BsSVDs9vXmOz+fcDkz1/nm+5dx8Prp1FwJeFiNHcQzU7ReeXpdI7nVj8ed/qxBvfZ017LJVe3dmQ7Pc60KgDrClkcSFWVFqsoMt+76Uu8tAHTPqe2DZx9eWl7cMG7mBV/LnclIBsBQUuE7x2dV31Fz8/2zMq4+3ggXTJk3qDB2EjAJv3h5FgdQQF7W29AcStoSWBivmqvbuanZxAo71acUvi6qME+83eYppb3qsO1SdUeKU3Kzry55IoDOOgGnC3i576HuTGflDhu3EBCu0HWrp/GZaMJjR4avn2zIoGojt+mMZAIuAMDzm+GZSgcz7bxSQpfGwXD3il4kGUIK3ZdXFhkgD6bSmE0s8wfLxht9m4Oc2ZyFHK4s7lJSuWMpluilSUvcvwcFKt4kLpcaB0hWnQjeu51KxrEzEe5wII1T59fmRRUSfHySIhvlE8YGa1RvH5Oxr9dpdrcCzVzD5e8wbH6kq5hM/tJy0MlHbKxW7xC5CoDxFIz/OnjoB6XSOFmhUu+HZlKxdAeXPsGWtQb8eHDDrwGRjN4NSiqfd2eYDZTZptK94sFQWYCb6ZQJWri+RJ9/cEX3t/ITVisF5pxc974rV6wgecozrEwBW7NVLbORKPV/xNE0TlwSwzbE8YzesoTqTACETrsDmFPGGrx5b+89g0kFQNxeogrzf+lr+e0tb/qtz9W3bJo7MJ7ECN7f2YST9SmdPHe69ZztgZd/oHlbpgGxlldkcXIpo9Rjrj5ix9YDDIdnC2Zz5M4j8hSJeYWtq1PsexwO88= ---END GANDCRAB KEY--- ---BEGIN PC DATA--- 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 ---END PC DATA---

URLs

http://gandcrabmfe6mnef.onion/d28bd0f830f133

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

Drops file in Program Files directory 28 IoCs

Processes:

rundll32.exe

description	ioc	process
File opened for modification	C:\Program Files\BlockUndo.xlt	rundll32.exe
File opened for modification	C:\Program Files\DismountRemove.shtml	rundll32.exe
File opened for modification	C:\Program Files\ExpandRemove.wdp	rundll32.exe
File opened for modification	C:\Program Files\SaveWrite.asp	rundll32.exe
File opened for modification	C:\Program Files\SubmitHide.cfg	rundll32.exe
File created	C:\Program Files\830f6d3830f13913.lock	rundll32.exe
File opened for modification	C:\Program Files\CompareMount.M2V	rundll32.exe
File opened for modification	C:\Program Files\InitializeAssert.cr2	rundll32.exe
File opened for modification	C:\Program Files\PublishMerge.zip	rundll32.exe
File opened for modification	C:\Program Files\ResumeCheckpoint.AAC	rundll32.exe
File opened for modification	C:\Program Files\EnablePop.wmx	rundll32.exe
File opened for modification	C:\Program Files\StartMeasure.3gp	rundll32.exe
File created	C:\Program Files (x86)\JLNIACJJK-DECRYPT.txt	rundll32.exe
File opened for modification	C:\Program Files\ConvertUnprotect.vstm	rundll32.exe
File opened for modification	C:\Program Files\ExpandSuspend.rmi	rundll32.exe
File opened for modification	C:\Program Files\FindExpand.vb	rundll32.exe
File opened for modification	C:\Program Files\ResolveResume.DVR	rundll32.exe
File opened for modification	C:\Program Files\SyncSelect.dotx	rundll32.exe
File opened for modification	C:\Program Files\PublishUnprotect.dotm	rundll32.exe
File created	C:\Program Files\JLNIACJJK-DECRYPT.txt	rundll32.exe
File opened for modification	C:\Program Files\LimitUse.contact	rundll32.exe
File opened for modification	C:\Program Files\CompressMove.xhtml	rundll32.exe
File opened for modification	C:\Program Files\DebugGrant.TS	rundll32.exe
File opened for modification	C:\Program Files\DisconnectRepair.mp2	rundll32.exe
File opened for modification	C:\Program Files\PingBackup.midi	rundll32.exe
File opened for modification	C:\Program Files\WriteUse.vstx	rundll32.exe
File opened for modification	C:\Program Files\InvokeConvert.nfo	rundll32.exe
File opened for modification	C:\Program Files\ReadRevoke.cr2	rundll32.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3296 436 WerFault.exe rundll32.exe

pid	pid_target	process	target process
3296	436	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 16 IoCs

Processes:

rundll32.exeWerFault.exe

pid	process
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
3296	WerFault.exe
3296	WerFault.exe
3296	WerFault.exe
3296	WerFault.exe
3296	WerFault.exe
3296	WerFault.exe
3296	WerFault.exe
3296	WerFault.exe
3296	WerFault.exe
3296	WerFault.exe
3296	WerFault.exe
3296	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 3296 WerFault.exe
Token: SeBackupPrivilege 3296 WerFault.exe
Token: SeDebugPrivilege 3296 WerFault.exe

description	pid	process
Token: SeRestorePrivilege	3296	WerFault.exe
Token: SeBackupPrivilege	3296	WerFault.exe
Token: SeDebugPrivilege	3296	WerFault.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 1420 wrote to memory of 436	1420	rundll32.exe	rundll32.exe
PID 1420 wrote to memory of 436	1420	rundll32.exe	rundll32.exe
PID 1420 wrote to memory of 436	1420	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\933210a9d19b25e0711ae88eece1ba06bb035a01ab2880cc707ff55bdd3b8dd0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1420

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\933210a9d19b25e0711ae88eece1ba06bb035a01ab2880cc707ff55bdd3b8dd0.dll,#1
2⤵
- Enumerates connected drives
- Drops file in Program Files directory
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:436

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 436 -s 684
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3296