Analysis
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max time kernel
134s -
max time network
124s -
platform
windows10-2004_x64 -
resource
win10v2004-20240709-en -
resource tags
arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system -
submitted
24-07-2024 17:25
Static task
static1
Behavioral task
behavioral1
Sample
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe
Resource
win10v2004-20240709-en
General
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Target
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe
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Size
291KB
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MD5
e6b43b1028b6000009253344632e69c4
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SHA1
e536b70e3ffe309f7ae59918da471d7bf4cadd1c
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SHA256
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a
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SHA512
07da214314673407a7d3978ee6e1d20bf1e02f135bf557e86b50489ecc146014f2534515c1b613dba96e65489d8c82caaa8ed2e647684d61e5e86bd3e8251adf
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SSDEEP
6144:nSRCSpUtLz+/enihebWBUOP3yIhLVMmi0CtG7go+I:SUOEnNnHbmP3yIE3tGX
Malware Config
Extracted
C:\$Recycle.Bin\S-1-5-21-1176886754-713327781-2233697964-1000\MTHQLT-MANUAL.txt
gandcrab
http://gandcrabmfe6mnef.onion/d833ad75ba1fb46b
Signatures
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Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
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Renames multiple (315) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000\Control Panel\International\Geo\Nation bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe -
Credentials from Password Stores: Windows Credential Manager 1 TTPs
Suspicious access to Credentials History.
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Drops startup file 2 IoCs
Processes:
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\MTHQLT-MANUAL.txt bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\ba1fb386ba1fb46a410.lock bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exedescription ioc process File opened (read-only) \??\K: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\H: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\J: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\W: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\I: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\S: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\M: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\O: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\Q: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\R: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\T: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\U: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\E: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\L: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\Y: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\Z: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\G: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\N: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\P: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\V: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\X: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\A: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened (read-only) \??\B: bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\\\bxmeoengtf.bmp" bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe -
Drops file in Program Files directory 23 IoCs
Processes:
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exedescription ioc process File opened for modification C:\Program Files\ExitSwitch.php bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\GetResize.mhtml bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\PublishGroup.DVR bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\RegisterSplit.mht bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\RequestGet.avi bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File created C:\Program Files\MTHQLT-MANUAL.txt bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\AssertEdit.search-ms bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\CloseTest.tiff bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\SaveGet.ppsm bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\UnlockEnter.iso bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\WaitMerge.eprtx bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File created C:\Program Files\ba1fb386ba1fb46a410.lock bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\SuspendInstall.vst bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File created C:\Program Files (x86)\MTHQLT-MANUAL.txt bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\MergeDisconnect.asp bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\ConnectUnregister.shtml bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\ConvertToStep.pptx bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\LockOpen.wav bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\PushWrite.docm bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\SaveApprove.mov bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\UndoShow.001 bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File created C:\Program Files (x86)\ba1fb386ba1fb46a410.lock bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe File opened for modification C:\Program Files\CompressResume.DVR-MS bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 3124 1020 WerFault.exe bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe -
System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
Processes:
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.execmd.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exepid process 1020 bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe 1020 bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe 1020 bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe 1020 bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exedescription pid process target process PID 1020 wrote to memory of 4512 1020 bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe cmd.exe PID 1020 wrote to memory of 4512 1020 bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe cmd.exe PID 1020 wrote to memory of 4512 1020 bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe cmd.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe"C:\Users\Admin\AppData\Local\Temp\bfb9db791b8250ffa8ebc48295c5dbbca757a5ed3bbb01de12a871b5cd9afd5a.exe"1⤵
- Checks computer location settings
- Drops startup file
- Enumerates connected drives
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1020 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c vssadmin delete shadows /all /quiet2⤵
- System Location Discovery: System Language Discovery
PID:4512 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1020 -s 14402⤵
- Program crash
PID:3124
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1020 -ip 10201⤵PID:2176
Network
MITRE ATT&CK Enterprise v15
Credential Access
Credentials from Password Stores
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
8KB
MD5eda59f94a87c1e386a1ed8976a0ac963
SHA1e8708ae595652a9ec04f01b82c2b89253258bf7f
SHA256c685b8d17245533b8e1aca3eea47a64bd78466f0f7a3f5ac2ffeafe3c694e630
SHA5127e3f46cb944d18c6f36303bd381f1f4e93b9172bbd60cc4258094956dab9f5b1c79bd5acb613a838a0ac9abc377f4df54b0f30672f106c5f776db6c00a45321d