Overview
overview
10Static
static
3cerber.exe
windows10-2004-x64
10cryptowall.exe
windows10-2004-x64
3jigsaw.exe
windows10-2004-x64
10Locky.exe
windows10-2004-x64
10131.exe
windows10-2004-x64
1Matsnu-MBR...3 .exe
windows10-2004-x64
3027cc450ef...d9.dll
windows10-2004-x64
10027cc450ef...ju.dll
windows10-2004-x64
10myguy.hta
windows10-2004-x64
3svchost.exe
windows10-2004-x64
7Ransomware...oad.sh
windows10-2004-x64
3Ransomware...est.py
windows10-2004-x64
3Ransomware...st2.py
windows10-2004-x64
3Ransomware...rna.py
windows10-2004-x64
3Analysis
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max time kernel
1799s -
max time network
1805s -
platform
windows10-2004_x64 -
resource
win10v2004-20231127-en -
resource tags
arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system -
submitted
07-12-2023 15:25
Static task
static1
Behavioral task
behavioral1
Sample
cerber.exe
Resource
win10v2004-20231130-en
windows10-2004-x64
Behavioral task
behavioral2
Sample
cryptowall.exe
Resource
win10v2004-20231127-en
windows10-2004-x64
Behavioral task
behavioral3
Sample
jigsaw.exe
Resource
win10v2004-20231127-en
windows10-2004-x64
Behavioral task
behavioral4
Sample
Locky.exe
Resource
win10v2004-20231130-en
windows10-2004-x64
Behavioral task
behavioral5
Sample
131.exe
Resource
win10v2004-20231127-en
windows10-2004-x64
Behavioral task
behavioral6
Sample
Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
Resource
win10v2004-20231127-en
windows10-2004-x64
Behavioral task
behavioral7
Sample
027cc450ef5f8c5f653329641ec1fed9.dll
Resource
win10v2004-20231130-en
windows10-2004-x64
Behavioral task
behavioral8
Sample
027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745_98STJd8lju.dll
Resource
win10v2004-20231127-en
windows10-2004-x64
Behavioral task
behavioral9
Sample
myguy.hta
Resource
win10v2004-20231127-en
windows10-2004-x64
Behavioral task
behavioral10
Sample
svchost.exe
Resource
win10v2004-20231130-en
windows10-2004-x64
Behavioral task
behavioral11
Sample
Ransomware-master/etc/load.sh
Resource
win10v2004-20231127-en
windows10-2004-x64
Behavioral task
behavioral12
Sample
Ransomware-master/test.py
Resource
win10v2004-20231127-en
windows10-2004-x64
Behavioral task
behavioral13
Sample
Ransomware-master/test2.py
Resource
win10v2004-20231130-en
windows10-2004-x64
Behavioral task
behavioral14
Sample
Ransomware-master/warna.py
Resource
win10v2004-20231130-en
windows10-2004-x64
General
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Target
027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745_98STJd8lju.dll
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Size
353KB
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MD5
71b6a493388e7d0b40c83ce903bc6b04
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SHA1
34f917aaba5684fbe56d3c57d48ef2a1aa7cf06d
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SHA256
027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745
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SHA512
072205eca5099d9269f358fe534b370ff21a4f12d7938d6d2e2713f69310f0698e53b8aff062849f0b2a521f68bee097c1840993825d2a5a3aa8cf4145911c6f
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SSDEEP
6144:y/Bt80VmNTBo/x95ZjAetGDN3VFNq7pC+9OqFoK30b3ni5rdQY/CdUOs2:y/X4NTS/x9jNG+w+9OqFoK323qdQYKUG
Malware Config
Signatures
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Mimikatz
mimikatz is an open source tool to dump credentials on Windows.
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mimikatz is an open source tool to dump credentials on Windows 2 IoCs
resource yara_rule behavioral8/files/0x0006000000023269-15.dat mimikatz behavioral8/files/0x0006000000023269-17.dat mimikatz -
Blocklisted process makes network request 5 IoCs
flow pid Process 1462 1168 rundll32.exe 1473 1168 rundll32.exe 1498 1168 rundll32.exe 1508 1168 rundll32.exe 1532 1168 rundll32.exe -
Deletes itself 1 IoCs
pid Process 1168 rundll32.exe -
Executes dropped EXE 1 IoCs
pid Process 760 F9C1.tmp -
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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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 59 IoCs
description ioc Process 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 (x86)\Adobe\Acrobat Reader DC\Reader\Welcome.pdf 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\jre-1.8\lib\deploy\ffjcext.zip 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 (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\Annotations\Stamps\Words.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\jdwpTransport.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\Microsoft Office\root\Office16\1033\PROTTPLV.PPT 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\Java\jre-1.8\lib\amd64\jvm.cfg 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\WebResources\Resource0\static\js\plugins\sample-files\assets\Sample Files\Adobe Acrobat Pro DC.pdf 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\NewGroup.vsdx 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\Microsoft Office\root\Office16\1033\PROTTPLV.DOC 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\Click on 'Change' to select default PDF handler.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\Google\Chrome\Application\106.0.5249.119\Installer\chrome.7z 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\Java\jdk-1.8\include\win32\bridge\AccessBridgeCalls.h 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 (x86)\Adobe\Acrobat Reader DC\Reader\IDTemplates\ENU\AdobeID.pdf rundll32.exe File opened for modification C:\Program Files\GroupEdit.vbs 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.XLS 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\Java\jdk-1.8\include\win32\jawt_md.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\PDFSigQFormalRep.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 (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\MobileAcrobatCard_Dark.pdf rundll32.exe File opened for modification C:\Program Files\ExitAssert.asp rundll32.exe File opened for modification C:\Program Files\InstallMerge.cfg 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\ResumePing.xlsx 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\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\jni.h rundll32.exe File opened for modification C:\Program Files\Microsoft Office\Office16\OSPP.VBS 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\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_Light.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\Adobe Sign White Paper.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\Java\jdk-1.8\include\win32\bridge\AccessBridgePackages.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\PROTTPLN.PPT rundll32.exe File opened for modification C:\Program Files\TraceResize.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\Complex Machine.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_Light.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 (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\MobileScanCard_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 -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2544 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 1168 rundll32.exe 1168 rundll32.exe 760 F9C1.tmp 760 F9C1.tmp 760 F9C1.tmp 760 F9C1.tmp 760 F9C1.tmp 760 F9C1.tmp -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeShutdownPrivilege 1168 rundll32.exe Token: SeDebugPrivilege 1168 rundll32.exe Token: SeTcbPrivilege 1168 rundll32.exe Token: SeDebugPrivilege 760 F9C1.tmp -
Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 1084 wrote to memory of 1168 1084 rundll32.exe 86 PID 1084 wrote to memory of 1168 1084 rundll32.exe 86 PID 1084 wrote to memory of 1168 1084 rundll32.exe 86 PID 1168 wrote to memory of 3532 1168 rundll32.exe 88 PID 1168 wrote to memory of 3532 1168 rundll32.exe 88 PID 1168 wrote to memory of 3532 1168 rundll32.exe 88 PID 1168 wrote to memory of 760 1168 rundll32.exe 90 PID 1168 wrote to memory of 760 1168 rundll32.exe 90 PID 3532 wrote to memory of 2544 3532 cmd.exe 92 PID 3532 wrote to memory of 2544 3532 cmd.exe 92 PID 3532 wrote to memory of 2544 3532 cmd.exe 92
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745_98STJd8lju.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1084 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745_98STJd8lju.dll,#12⤵
- Blocklisted process makes network request
- Deletes itself
- Writes to the Master Boot Record (MBR)
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1168 -
C:\Windows\SysWOW64\cmd.exe/c schtasks /Create /SC once /TN "" /TR "C:\Windows\system32\shutdown.exe /r /f" /ST 18:043⤵
- Suspicious use of WriteProcessMemory
PID:3532 -
C:\Windows\SysWOW64\schtasks.exeschtasks /Create /SC once /TN "" /TR "C:\Windows\system32\shutdown.exe /r /f" /ST 18:044⤵
- Creates scheduled task(s)
PID:2544
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C:\Users\Admin\AppData\Local\Temp\F9C1.tmp"C:\Users\Admin\AppData\Local\Temp\F9C1.tmp" \\.\pipe\{75D7FB83-BB89-438B-8746-87CB8B7B73AA}3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:760
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
55KB
MD57e37ab34ecdcc3e77e24522ddfd4852d
SHA138e2855e11e353cedf9a8a4f2f2747f1c5c07fcf
SHA25602ef73bd2458627ed7b397ec26ee2de2e92c71a0e7588f78734761d8edbdcd9f
SHA5121b037a2aa8bf951d2ffe2f724aa0b2fbb39c2173215806ba0327bda7b096301d887f9bb7db46f9e04584b16aa6b1aaeaf67f0ecf5f20eb02ceac27c8753ca587
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Filesize
55KB
MD57e37ab34ecdcc3e77e24522ddfd4852d
SHA138e2855e11e353cedf9a8a4f2f2747f1c5c07fcf
SHA25602ef73bd2458627ed7b397ec26ee2de2e92c71a0e7588f78734761d8edbdcd9f
SHA5121b037a2aa8bf951d2ffe2f724aa0b2fbb39c2173215806ba0327bda7b096301d887f9bb7db46f9e04584b16aa6b1aaeaf67f0ecf5f20eb02ceac27c8753ca587