Overview
overview
10Static
static
3cerber.exe
windows11-21h2-x64
10cryptowall.exe
windows11-21h2-x64
3jigsaw.exe
windows11-21h2-x64
10Locky.exe
windows11-21h2-x64
10131.exe
windows11-21h2-x64
3Matsnu-MBR...3 .exe
windows11-21h2-x64
3027cc450ef...d9.dll
windows11-21h2-x64
10027cc450ef...ju.dll
windows11-21h2-x64
10myguy.hta
windows11-21h2-x64
3svchost.exe
windows11-21h2-x64
7Analysis
- max time kernel
149s - max time network
152s - platform
windows11-21h2_x64 - resource
win11-20241007-es - resource tags
arch:x64arch:x86image:win11-20241007-eslocale:es-esos:windows11-21h2-x64systemwindows - submitted
10/11/2024, 19:45
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
cerber.exe
Resource
win11-20241023-es
windows11-21h2-x64
19 signatures
150 seconds
Behavioral task
behavioral2
Sample
cryptowall.exe
Resource
win11-20241007-es
windows11-21h2-x64
3 signatures
150 seconds
Behavioral task
behavioral3
Sample
jigsaw.exe
Resource
win11-20241007-es
windows11-21h2-x64
9 signatures
150 seconds
Behavioral task
behavioral4
Sample
Locky.exe
Resource
win11-20241007-es
windows11-21h2-x64
3 signatures
150 seconds
Behavioral task
behavioral5
Sample
131.exe
Resource
win11-20241007-es
windows11-21h2-x64
1 signatures
150 seconds
Behavioral task
behavioral6
Sample
Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
Resource
win11-20241007-es
windows11-21h2-x64
3 signatures
150 seconds
Behavioral task
behavioral7
Sample
027cc450ef5f8c5f653329641ec1fed9.dll
Resource
win11-20241007-es
windows11-21h2-x64
14 signatures
150 seconds
Behavioral task
behavioral8
Sample
027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745_98STJd8lju.dll
Resource
win11-20241007-es
windows11-21h2-x64
14 signatures
150 seconds
Behavioral task
behavioral9
Sample
myguy.hta
Resource
win11-20241007-es
windows11-21h2-x64
3 signatures
150 seconds
Behavioral task
behavioral10
Sample
svchost.exe
Resource
win11-20241007-es
windows11-21h2-x64
5 signatures
150 seconds
General
- Target 027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745_98STJd8lju.dll
- Size 353KB
- Sample241110-ygny1stdmp
- 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 family
- mimikatz is an open source tool to dump credentials on Windows 1 IoCs
resource yara_rule behavioral8/files/0x001b00000002aaf9-14.dat mimikatz - Deletes itself 1 IoCs
pid Process 2940 rundll32.exe - Executes dropped EXE 1 IoCs
pid Process 2904 8AFA.tmp - Reads user/profile data of web browsers 3 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 56 IoCs
description ioc Process 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\Microsoft Office\root\Office16\1033\PROTTPLV.DOC 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\Java\jdk-1.8\include\jvmti.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 (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\PDFSigQFormalRep.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\jre-1.8\lib\amd64\jvm.cfg 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\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 (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\sample-files\assets\Sample Files\Adobe Sign White Paper.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 (x86)\Adobe\Acrobat Reader DC\Reader\IDTemplates\ENU\DefaultID.pdf rundll32.exe File opened for modification C:\Program Files\Mozilla Firefox\firefox.cfg 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\Microsoft Office\root\Office16\1033\PROTTPLN.DOC rundll32.exe File opened for modification C:\Program Files\RepairRedo.rtf rundll32.exe File opened for modification C:\Program Files\RevokeResume.cfg 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 (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\Java\jdk-1.8\include\win32\bridge\AccessBridgeCalls.h rundll32.exe File opened for modification C:\Program Files\StepCompare.asp 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\SignHere.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\javafx-src.zip 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\include\win32\jni_md.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_Dark.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\jre\lib\amd64\jvm.cfg 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\Java\jdk-1.8\include\classfile_constants.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\Office16\1033\PROTTPLN.XLS 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\plug_ins\Annotations\Stamps\ENU\Dynamic.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)\Common Files\Oracle\Java\java.settings.cfg 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\jdk-1.8\include\jvmticmlr.h 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 (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\Resource\ENUtxt.pdf rundll32.exe File opened for modification C:\Program Files\ImportSave.docx 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 (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\jawt.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_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\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\Java\jdk-1.8\include\jni.h 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 rundll32.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.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 2416 schtasks.exe - Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 2940 rundll32.exe 2940 rundll32.exe 2904 8AFA.tmp 2904 8AFA.tmp 2904 8AFA.tmp 2904 8AFA.tmp 2904 8AFA.tmp 2904 8AFA.tmp - Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeShutdownPrivilege 2940 rundll32.exe Token: SeDebugPrivilege 2940 rundll32.exe Token: SeTcbPrivilege 2940 rundll32.exe Token: SeDebugPrivilege 2904 8AFA.tmp - Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 4124 wrote to memory of 2940 4124 rundll32.exe 77 PID 4124 wrote to memory of 2940 4124 rundll32.exe 77 PID 4124 wrote to memory of 2940 4124 rundll32.exe 77 PID 2940 wrote to memory of 656 2940 rundll32.exe 78 PID 2940 wrote to memory of 656 2940 rundll32.exe 78 PID 2940 wrote to memory of 656 2940 rundll32.exe 78 PID 2940 wrote to memory of 2904 2940 rundll32.exe 79 PID 2940 wrote to memory of 2904 2940 rundll32.exe 79 PID 656 wrote to memory of 2416 656 cmd.exe 82 PID 656 wrote to memory of 2416 656 cmd.exe 82 PID 656 wrote to memory of 2416 656 cmd.exe 82
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:4124 -
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:2940 -
C:\Windows\SysWOW64\cmd.exe/c schtasks /Create /SC once /TN "" /TR "C:\Windows\system32\shutdown.exe /r /f" /ST 20:483⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:656 -
C:\Windows\SysWOW64\schtasks.exeschtasks /Create /SC once /TN "" /TR "C:\Windows\system32\shutdown.exe /r /f" /ST 20:484⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2416
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C:\Users\Admin\AppData\Local\Temp\8AFA.tmp"C:\Users\Admin\AppData\Local\Temp\8AFA.tmp" \\.\pipe\{3801901A-62EC-4C6D-9926-E7B0EC8022AB}3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2904
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\8AFA.tmp
- Size 55KB
- SHA256 02ef73bd2458627ed7b397ec26ee2de2e92c71a0e7588f78734761d8edbdcd9f
- MD5 7e37ab34ecdcc3e77e24522ddfd4852d
- SHA1 38e2855e11e353cedf9a8a4f2f2747f1c5c07fcf
- SHA512 1b037a2aa8bf951d2ffe2f724aa0b2fbb39c2173215806ba0327bda7b096301d887f9bb7db46f9e04584b16aa6b1aaeaf67f0ecf5f20eb02ceac27c8753ca587
- SSDEEP 768:wglvV3eE6cYdk8TcqiAjpEhtFLIZJ92evTlvGTIRVIRYcwq22zDcENaiaX+kDt9J:3ihTaAjZNlGT5YcdYENvkA+ChJfSz
- MD5 SHA1 SHA512 SSDEEP