gandcrab | 0b432f20d54647f077811ecb1df4dbc64fb17fbd6a9e0cce4ac9437d5f7891fb

Resubmissions

18-03-2024 22:36

240318-2h9hwsba88 10

Analysis

max time kernel
1384s
max time network
1175s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
18-03-2024 22:36

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General

Target

Ransomware/GandCrab.exe
Size

291KB
MD5

e6b43b1028b6000009253344632e69c4
SHA1

e536b70e3ffe309f7ae59918da471d7bf4cadd1c
SHA256

bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a
SHA512

07da214314673407a7d3978ee6e1d20bf1e02f135bf557e86b50489ecc146014f2534515c1b613dba96e65489d8c82caaa8ed2e647684d61e5e86bd3e8251adf
SSDEEP

6144:nSRCSpUtLz+/enihebWBUOP3yIhLVMmi0CtG7go+I:SUOEnNnHbmP3yIE3tGX

Score

10^/10

gandcrab backdoor ransomware spyware stealer

Malware Config

Extracted

Path

C:\$Recycle.Bin\TCOSKHQIR-MANUAL.txt

Family

gandcrab

Ransom Note

---= GANDCRAB V5.2 =--- ***********************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: .TCOSKHQIR 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/9c5c0a3eaa441c76 | 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/9c5c0a3eaa441c76

Signatures

Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
ransomware backdoor gandcrab
Renames multiple (269) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

GandCrab.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	GandCrab.exe

Drops startup file 2 IoCs

Processes:

GandCrab.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\aa441b9baa441c7361a.lock	GandCrab.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\TCOSKHQIR-MANUAL.txt	GandCrab.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Enumerates connected drives 3 TTPs 23 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:

GandCrab.exe

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

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

GandCrab.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\\\bxmeoengtf.bmp"	GandCrab.exe

Drops file in Program Files directory 28 IoCs

Processes:

GandCrab.exe

description	ioc	process
File opened for modification	C:\Program Files\DenyDisable.contact	GandCrab.exe
File opened for modification	C:\Program Files\FindAdd.xml	GandCrab.exe
File opened for modification	C:\Program Files\PopWatch.edrwx	GandCrab.exe
File opened for modification	C:\Program Files\GrantCopy.wmf	GandCrab.exe
File opened for modification	C:\Program Files\ConvertToResolve.tif	GandCrab.exe
File opened for modification	C:\Program Files\CopySync.easmx	GandCrab.exe
File opened for modification	C:\Program Files\DismountSuspend.ps1	GandCrab.exe
File opened for modification	C:\Program Files\WriteUnregister.shtml	GandCrab.exe
File opened for modification	C:\Program Files\DenyRepair.aiff	GandCrab.exe
File opened for modification	C:\Program Files\OptimizeApprove.ps1xml	GandCrab.exe
File opened for modification	C:\Program Files\SelectEdit.001	GandCrab.exe
File opened for modification	C:\Program Files\SplitSkip.crw	GandCrab.exe
File opened for modification	C:\Program Files\SelectReceive.css	GandCrab.exe
File opened for modification	C:\Program Files\StepUnblock.js	GandCrab.exe
File created	C:\Program Files (x86)\aa441b9baa441c7361a.lock	GandCrab.exe
File opened for modification	C:\Program Files\AssertConvertFrom.doc	GandCrab.exe
File opened for modification	C:\Program Files\SearchDebug.dwfx	GandCrab.exe
File opened for modification	C:\Program Files\StepPublish.mov	GandCrab.exe
File opened for modification	C:\Program Files\UnlockOpen.mp3	GandCrab.exe
File created	C:\Program Files\TCOSKHQIR-MANUAL.txt	GandCrab.exe
File opened for modification	C:\Program Files\DenyUnlock.AAC	GandCrab.exe
File opened for modification	C:\Program Files\DismountExpand.xlsm	GandCrab.exe
File opened for modification	C:\Program Files\GrantBlock.avi	GandCrab.exe
File opened for modification	C:\Program Files\WatchHide.rmi	GandCrab.exe
File created	C:\Program Files (x86)\TCOSKHQIR-MANUAL.txt	GandCrab.exe
File created	C:\Program Files\aa441b9baa441c7361a.lock	GandCrab.exe
File opened for modification	C:\Program Files\CopyResolve.scf	GandCrab.exe
File opened for modification	C:\Program Files\DenyRepair.dotx	GandCrab.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4044 3900 WerFault.exe GandCrab.exe

pid	pid_target	process	target process
4044	3900	WerFault.exe	GandCrab.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:

GandCrab.exe

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

GandCrab.exe

pid process

3900 GandCrab.exe
3900 GandCrab.exe
3900 GandCrab.exe
3900 GandCrab.exe

pid	process
3900	GandCrab.exe
3900	GandCrab.exe
3900	GandCrab.exe
3900	GandCrab.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

GandCrab.exe

description	pid	process	target process
PID 3900 wrote to memory of 5044	3900	GandCrab.exe	cmd.exe
PID 3900 wrote to memory of 5044	3900	GandCrab.exe	cmd.exe
PID 3900 wrote to memory of 5044	3900	GandCrab.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\Ransomware\GandCrab.exe
"C:\Users\Admin\AppData\Local\Temp\Ransomware\GandCrab.exe"
1⤵
- Checks computer location settings
- 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:3900

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c vssadmin delete shadows /all /quiet
2⤵
PID:5044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3900 -s 1672
2⤵
- Program crash
PID:4044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3900 -ip 3900
1⤵
PID:4180

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Peripheral Device Discovery

T1120

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Defacement

T1491

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\$Recycle.Bin\TCOSKHQIR-MANUAL.txt
Filesize
8KB

MD5
7a6e0332bc662911b90976ca1a0b6e10

SHA1
73b2e092e7acf21f10a802627f32f0b430724e45

SHA256
e17a8c7a01ff3eb9e33c851ac304680417eae3f02531f88289d0bcf4521106aa

SHA512
02b1783272eb37ccbe94793f3926baf0b6f4bbf457a4cc9a2354d6a8d17053ae53c78bf18d0816d9a3c33e4869fecf2a1490e1b5d734ad5e5f957c2485d0f0f5

Download Submit
memory/3900-1-0x0000000005520000-0x0000000005620000-memory.dmp

Filesize
1024KB

Download
memory/3900-693-0x0000000000400000-0x00000000052B3000-memory.dmp

Filesize
78.7MB

Download
memory/3900-695-0x0000000000400000-0x00000000052B3000-memory.dmp

Filesize
78.7MB

Download