Overview
overview
10Static
static
3Ransomware-master.zip
windows10-1703-x64
8Ransomware-master.zip
windows10-2004-x64
1cerber.exe
windows10-1703-x64
10cerber.exe
windows10-2004-x64
10cryptowall.exe
windows10-1703-x64
3cryptowall.exe
windows10-2004-x64
3jigsaw.exe
windows10-1703-x64
10jigsaw.exe
windows10-2004-x64
10Locky.exe
windows10-1703-x64
10Locky.exe
windows10-2004-x64
10131.exe
windows10-1703-x64
3131.exe
windows10-2004-x64
3Matsnu-MBR...3 .exe
windows10-1703-x64
3Matsnu-MBR...3 .exe
windows10-2004-x64
3027cc450ef...d9.dll
windows10-1703-x64
10027cc450ef...d9.dll
windows10-2004-x64
10027cc450ef...ju.dll
windows10-1703-x64
10027cc450ef...ju.dll
windows10-2004-x64
10myguy.hta
windows10-1703-x64
3myguy.hta
windows10-2004-x64
7svchost.exe
windows10-1703-x64
7svchost.exe
windows10-2004-x64
7Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system - submitted
02/08/2024, 16:50
Static task
static1
Behavioral task
behavioral1
Sample
Ransomware-master.zip
Resource
win10-20240404-en
windows10-1703-x64
Behavioral task
behavioral2
Sample
Ransomware-master.zip
Resource
win10v2004-20240802-en
windows10-2004-x64
Behavioral task
behavioral3
Sample
cerber.exe
Resource
win10-20240404-en
windows10-1703-x64
Behavioral task
behavioral4
Sample
cerber.exe
Resource
win10v2004-20240802-en
windows10-2004-x64
Behavioral task
behavioral5
Sample
cryptowall.exe
Resource
win10-20240611-en
windows10-1703-x64
Behavioral task
behavioral6
Sample
cryptowall.exe
Resource
win10v2004-20240802-en
windows10-2004-x64
Behavioral task
behavioral7
Sample
jigsaw.exe
Resource
win10-20240404-en
windows10-1703-x64
Behavioral task
behavioral8
Sample
jigsaw.exe
Resource
win10v2004-20240802-en
windows10-2004-x64
Behavioral task
behavioral9
Sample
Locky.exe
Resource
win10-20240404-en
windows10-1703-x64
Behavioral task
behavioral10
Sample
Locky.exe
Resource
win10v2004-20240802-en
windows10-2004-x64
Behavioral task
behavioral11
Sample
131.exe
Resource
win10-20240404-en
windows10-1703-x64
Behavioral task
behavioral12
Sample
131.exe
Resource
win10v2004-20240802-en
windows10-2004-x64
Behavioral task
behavioral13
Sample
Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
Resource
win10-20240404-en
windows10-1703-x64
Behavioral task
behavioral14
Sample
Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
Resource
win10v2004-20240802-en
windows10-2004-x64
Behavioral task
behavioral15
Sample
027cc450ef5f8c5f653329641ec1fed9.dll
Resource
win10-20240404-en
windows10-1703-x64
Behavioral task
behavioral16
Sample
027cc450ef5f8c5f653329641ec1fed9.dll
Resource
win10v2004-20240802-en
windows10-2004-x64
Behavioral task
behavioral17
Sample
027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745_98STJd8lju.dll
Resource
win10-20240611-en
windows10-1703-x64
Behavioral task
behavioral18
Sample
027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745_98STJd8lju.dll
Resource
win10v2004-20240802-en
windows10-2004-x64
Behavioral task
behavioral19
Sample
myguy.hta
Resource
win10-20240404-en
windows10-1703-x64
Behavioral task
behavioral20
Sample
myguy.hta
Resource
win10v2004-20240802-en
windows10-2004-x64
Behavioral task
behavioral21
Sample
svchost.exe
Resource
win10-20240404-en
windows10-1703-x64
Behavioral task
behavioral22
Sample
svchost.exe
Resource
win10v2004-20240802-en
windows10-2004-x64
General
- Target 027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745_98STJd8lju.dll
- Size 353KB
- Sample240802-vcrybswgrg
- SHA256 027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745
- MD5 71b6a493388e7d0b40c83ce903bc6b04
- SHA1 34f917aaba5684fbe56d3c57d48ef2a1aa7cf06d
- SHA512 072205eca5099d9269f358fe534b370ff21a4f12d7938d6d2e2713f69310f0698e53b8aff062849f0b2a521f68bee097c1840993825d2a5a3aa8cf4145911c6f
- SSDEEP 6144:y/Bt80VmNTBo/x95ZjAetGDN3VFNq7pC+9OqFoK30b3ni5rdQY/CdUOs2:y/X4NTS/x9jNG+w+9OqFoK323qdQYKUG
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Mimikatz
mimikatz is an open source tool to dump credentials on Windows.
- mimikatz is an open source tool to dump credentials on Windows 1 IoCs
resource yara_rule behavioral18/files/0x00080000000234da-14.dat mimikatz - Deletes itself 1 IoCs
pid Process 8 rundll32.exe - Executes dropped EXE 1 IoCs
pid Process 3568 B41D.tmp - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
description ioc Process File opened for modification \??\PhysicalDrive0 rundll32.exe - Drops file in Program Files directory 58 IoCs
description ioc Process File opened for modification C:\Program Files\EnterRevoke.doc rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\include\win32\jni_md.h rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\jre\lib\deploy\ffjcext.zip rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\Annotations\Stamps\Words.pdf rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\include\win32\bridge\AccessBridgePackages.h rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\HomeBanner_Light.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\MobileScanCard_Light.pdf rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Web Server Extensions\16\BIN\1033\FPEXT.MSG rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\IDTemplates\ENU\DefaultID.pdf rundll32.exe File opened for modification C:\Program Files\FindLimit.zip rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\include\jni.h rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\include\win32\bridge\AccessBridgeCallbacks.h rundll32.exe File opened for modification C:\Program Files\DismountResize.rtf rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\include\jawt.h rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\javafx-src.zip rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\MobileAcrobatCard_Light.pdf rundll32.exe File opened for modification C:\Program Files\Java\jre-1.8\lib\amd64\jvm.cfg rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLN.DOC rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLN.PPT rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Microsoft3DViewer_6.1908.2042.0_x64__8wekyb3d8bbwe\Assets\Archive.zip rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\IDTemplates\ENU\AdobeID.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\Annotations\Stamps\ENU\SignHere.pdf rundll32.exe File opened for modification C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\chrome.7z rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\include\classfile_constants.h rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\include\win32\bridge\AccessBridgeCalls.h rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLV.XLS rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLN.XLS rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\PDFSigQFormalRep.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\MobileScanCard_Dark.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Common Files\Oracle\Java\java.settings.cfg rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sample-files\assets\Sample Files\Adobe Cloud Services.pdf rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\include\jvmti.h rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\jre\lib\amd64\jvm.cfg rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLV.PPT rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sample-files\assets\Sample Files\Adobe Acrobat Pro DC.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Resource\ENUtxt.pdf rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\include\win32\bridge\AccessBridgeCalls.c rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\1494870C-9912-C184-4CC9-B401-A53F4D8DE290.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\Annotations\Stamps\ENU\StandardBusiness.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\HomeBanner_Dark.pdf rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\include\jvmticmlr.h rundll32.exe File opened for modification C:\Program Files\Mozilla Firefox\firefox.cfg rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sample-files\assets\Sample Files\Bus Schedule.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sample-files\assets\Sample Files\Complex Machine.pdf rundll32.exe File opened for modification C:\Program Files\EditUnprotect.xlsx rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\include\win32\jawt_md.h rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\Windows\SHELLNEW\EXCEL12.XLSX rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\sample-files\assets\Sample Files\Adobe Sign White Paper.pdf rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\SAMPLES\SOLVSAMP.XLS rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\include\jdwpTransport.h rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLV.DOC rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\Annotations\Stamps\ENU\Dynamic.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Welcome.pdf rundll32.exe File opened for modification C:\Program Files\Java\jre-1.8\lib\deploy\ffjcext.zip rundll32.exe File opened for modification C:\Program Files\Microsoft Office\Office16\OSPP.VBS rundll32.exe File opened for modification C:\Program Files\NewConvert.zip rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Click on 'Change' to select default PDF handler.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\MobileAcrobatCard_Dark.pdf rundll32.exe - Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745_98STJd8lju rundll32.exe File created C:\Windows\dllhost.dat rundll32.exe - System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe - Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4952 schtasks.exe - Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 8 rundll32.exe 8 rundll32.exe 3568 B41D.tmp 3568 B41D.tmp 3568 B41D.tmp 3568 B41D.tmp 3568 B41D.tmp 3568 B41D.tmp - Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeShutdownPrivilege 8 rundll32.exe Token: SeDebugPrivilege 8 rundll32.exe Token: SeTcbPrivilege 8 rundll32.exe Token: SeDebugPrivilege 3568 B41D.tmp - Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 1760 wrote to memory of 8 1760 rundll32.exe 81 PID 1760 wrote to memory of 8 1760 rundll32.exe 81 PID 1760 wrote to memory of 8 1760 rundll32.exe 81 PID 8 wrote to memory of 1544 8 rundll32.exe 84 PID 8 wrote to memory of 1544 8 rundll32.exe 84 PID 8 wrote to memory of 1544 8 rundll32.exe 84 PID 8 wrote to memory of 3568 8 rundll32.exe 85 PID 8 wrote to memory of 3568 8 rundll32.exe 85 PID 1544 wrote to memory of 4952 1544 cmd.exe 88 PID 1544 wrote to memory of 4952 1544 cmd.exe 88 PID 1544 wrote to memory of 4952 1544 cmd.exe 88
Processes
-
C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745_98STJd8lju.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1760 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745_98STJd8lju.dll,#12⤵
- Deletes itself
- Writes to the Master Boot Record (MBR)
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:8 -
C:\Windows\SysWOW64\cmd.exe/c schtasks /Create /SC once /TN "" /TR "C:\Windows\system32\shutdown.exe /r /f" /ST 17:543⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1544 -
C:\Windows\SysWOW64\schtasks.exeschtasks /Create /SC once /TN "" /TR "C:\Windows\system32\shutdown.exe /r /f" /ST 17:544⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:4952
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-
-
C:\Users\Admin\AppData\Local\Temp\B41D.tmp"C:\Users\Admin\AppData\Local\Temp\B41D.tmp" \\.\pipe\{23A71350-41F8-4FE4-ABE8-B03772EB183E}3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3568
-
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\B41D.tmp
- Size 55KB
- SHA256 02ef73bd2458627ed7b397ec26ee2de2e92c71a0e7588f78734761d8edbdcd9f
- MD5 7e37ab34ecdcc3e77e24522ddfd4852d
- SHA1 38e2855e11e353cedf9a8a4f2f2747f1c5c07fcf
- SHA512 1b037a2aa8bf951d2ffe2f724aa0b2fbb39c2173215806ba0327bda7b096301d887f9bb7db46f9e04584b16aa6b1aaeaf67f0ecf5f20eb02ceac27c8753ca587
- SSDEEP 768:wglvV3eE6cYdk8TcqiAjpEhtFLIZJ92evTlvGTIRVIRYcwq22zDcENaiaX+kDt9J:3ihTaAjZNlGT5YcdYENvkA+ChJfSz
- MD5 SHA1 SHA512 SSDEEP