Analysis
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max time kernel
187s -
max time network
208s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
20-05-2022 05:53
Static task
static1
Behavioral task
behavioral1
Sample
e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe
Resource
win10v2004-20220414-en
General
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Target
e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe
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Size
390KB
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MD5
b6cc1e4052f613e15a8b05439f5877b4
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SHA1
9bb3cb5080ae18985d93a28faeca6ae06d768b21
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SHA256
e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737
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SHA512
cd48f448cd355a1463ca090d8ad47100596e1ed1a1a771f26c672406669433e9d9d915268def0aad844511f65a3c69fbb3ab2e2dc610ecc0f66a8524a6a8ea73
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 4 IoCs
Processes:
resource yara_rule \Users\Admin\AppData\Local\Temp\C5DF.tmp mimikatz C:\Users\Admin\AppData\Local\Temp\C5DF.tmp mimikatz \Users\Admin\AppData\Local\Temp\C5DF.tmp mimikatz \Users\Admin\AppData\Local\Temp\C5DF.tmp mimikatz -
Executes dropped EXE 1 IoCs
Processes:
C5DF.tmppid process 1232 C5DF.tmp -
Loads dropped DLL 3 IoCs
Processes:
rundll32.exepid process 1200 rundll32.exe 1200 rundll32.exe 1776 -
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.
Processes:
rundll32.exedescription ioc process File opened for modification \??\PhysicalDrive0 rundll32.exe -
Drops file in Program Files directory 64 IoCs
Processes:
rundll32.exedescription ioc process File opened for modification C:\Program Files (x86)\Microsoft Sync Framework\v1.0\Documentation\1033\License Agreements\SynchronizationEula.rtf rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\Interface.zip rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\VisualBasic\1033\Text.zip rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\include\win32\bridge\AccessBridgeCalls.h rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\AccessWeb\SERVWRAP.ASP rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\REPLTMPL.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\SMIMES.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\ResourceInternal.zip rundll32.exe File opened for modification C:\Program Files\Internet Explorer\en-US\eula.rtf rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\IDTemplates\ENU\DefaultID.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\SMIMEE.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\AppConfig.zip rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\VisualBasic\1033\MDIParent.zip rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\include\classfile_constants.h rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\NOTE.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\MDIParent.zip rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\Resource.zip rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\include\win32\bridge\AccessBridgePackages.h rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\ACTIVITY.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\EXITEM.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\SHARING.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\TASKREQ.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\XmlFile.zip rundll32.exe File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\GRPHFLT\CGMIMP32.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Resource\ENUtxt.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\SCHDREST.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\Visualizer.zip rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\p2\org.eclipse.equinox.p2.engine\profileRegistry\JMC.profile\1423861240389.profile.gz rundll32.exe File opened for modification C:\Program Files\LockMove.doc rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\PDFSigQFormalRep.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\Annotations\Stamps\ENU\StandardBusiness.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\APPT.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\OMSSMS.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\SECURE.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\SettingsInternal.zip rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\etc\visualvm.conf rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\CONTACT.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\OSPP.VBS rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\PROTTPLV.PPT rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\Class.zip rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\AboutBox.zip rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\VisualBasic\1033\Dataset.zip rundll32.exe File opened for modification C:\Program Files\Java\jre7\lib\amd64\jvm.cfg rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\Annotations\Stamps\ENU\SignHere.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\PROTTPLV.DOC rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\Settings.zip rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\include\jvmticmlr.h rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\DISTLIST.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\RCLRPT.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\TASKACC.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\TASKDEC.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\Annotations\Stamps\ENU\Dynamic.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\PROTTPLN.PPT rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\VisualBasic\1033\Form.zip rundll32.exe File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\Web Server Extensions\14\BIN\1033\FPEXT.MSG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\OMSMMS.CFG rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\CSharp\1033\Form.zip rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Visual Studio 8\Common7\IDE\VSTA\ItemTemplates\VisualBasic\1033\UserControl.zip rundll32.exe File opened for modification C:\Program Files\Java\jre7\lib\deploy\ffjcext.zip rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\include\jdwpTransport.h rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\p2\org.eclipse.equinox.p2.engine\profileRegistry\JMC.profile\1423861261279.profile.gz rundll32.exe File opened for modification C:\Program Files\Google\Chrome\Application\89.0.4389.114\Installer\chrome.7z rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\Annotations\Stamps\Words.pdf rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\FORMS\1033\DOC.CFG rundll32.exe -
Drops file in Windows directory 4 IoCs
Processes:
e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exerundll32.exedescription ioc process File created C:\Windows\perfc.dat e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe File opened for modification C:\Windows\perfc.dat rundll32.exe File created C:\Windows\perfc rundll32.exe File created C:\Windows\dllhost.dat rundll32.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
rundll32.exeC5DF.tmppid process 1200 rundll32.exe 1232 C5DF.tmp 1232 C5DF.tmp 1232 C5DF.tmp 1232 C5DF.tmp 1232 C5DF.tmp -
Suspicious use of AdjustPrivilegeToken 4 IoCs
Processes:
rundll32.exeC5DF.tmpdescription pid process Token: SeShutdownPrivilege 1200 rundll32.exe Token: SeDebugPrivilege 1200 rundll32.exe Token: SeTcbPrivilege 1200 rundll32.exe Token: SeDebugPrivilege 1232 C5DF.tmp -
Suspicious use of WriteProcessMemory 19 IoCs
Processes:
e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exerundll32.execmd.exedescription pid process target process PID 1660 wrote to memory of 1200 1660 e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe rundll32.exe PID 1660 wrote to memory of 1200 1660 e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe rundll32.exe PID 1660 wrote to memory of 1200 1660 e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe rundll32.exe PID 1660 wrote to memory of 1200 1660 e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe rundll32.exe PID 1660 wrote to memory of 1200 1660 e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe rundll32.exe PID 1660 wrote to memory of 1200 1660 e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe rundll32.exe PID 1660 wrote to memory of 1200 1660 e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe rundll32.exe PID 1200 wrote to memory of 1724 1200 rundll32.exe cmd.exe PID 1200 wrote to memory of 1724 1200 rundll32.exe cmd.exe PID 1200 wrote to memory of 1724 1200 rundll32.exe cmd.exe PID 1200 wrote to memory of 1724 1200 rundll32.exe cmd.exe PID 1200 wrote to memory of 1232 1200 rundll32.exe C5DF.tmp PID 1200 wrote to memory of 1232 1200 rundll32.exe C5DF.tmp PID 1200 wrote to memory of 1232 1200 rundll32.exe C5DF.tmp PID 1200 wrote to memory of 1232 1200 rundll32.exe C5DF.tmp PID 1724 wrote to memory of 600 1724 cmd.exe schtasks.exe PID 1724 wrote to memory of 600 1724 cmd.exe schtasks.exe PID 1724 wrote to memory of 600 1724 cmd.exe schtasks.exe PID 1724 wrote to memory of 600 1724 cmd.exe schtasks.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe"C:\Users\Admin\AppData\Local\Temp\e2ea7f9581a7e1386fc6601d1421e1194373c1c891f2d406de6d49810fcc7737.exe"1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exe"C:\Windows\System32\rundll32.exe" C:\Windows\perfc.dat #12⤵
- Loads dropped DLL
- 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
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C:\Windows\SysWOW64\cmd.exe/c schtasks /Create /SC once /TN "" /TR "C:\Windows\system32\shutdown.exe /r /f" /ST 09:403⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /Create /SC once /TN "" /TR "C:\Windows\system32\shutdown.exe /r /f" /ST 09:404⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\C5DF.tmp"C:\Users\Admin\AppData\Local\Temp\C5DF.tmp" \\.\pipe\{851E8B18-E140-437E-9272-7D7A031CD9C1}3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\C5DF.tmpFilesize
55KB
MD57e37ab34ecdcc3e77e24522ddfd4852d
SHA138e2855e11e353cedf9a8a4f2f2747f1c5c07fcf
SHA25602ef73bd2458627ed7b397ec26ee2de2e92c71a0e7588f78734761d8edbdcd9f
SHA5121b037a2aa8bf951d2ffe2f724aa0b2fbb39c2173215806ba0327bda7b096301d887f9bb7db46f9e04584b16aa6b1aaeaf67f0ecf5f20eb02ceac27c8753ca587
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C:\Windows\perfc.datFilesize
353KB
MD571b6a493388e7d0b40c83ce903bc6b04
SHA134f917aaba5684fbe56d3c57d48ef2a1aa7cf06d
SHA256027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745
SHA512072205eca5099d9269f358fe534b370ff21a4f12d7938d6d2e2713f69310f0698e53b8aff062849f0b2a521f68bee097c1840993825d2a5a3aa8cf4145911c6f
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\Users\Admin\AppData\Local\Temp\C5DF.tmpFilesize
55KB
MD57e37ab34ecdcc3e77e24522ddfd4852d
SHA138e2855e11e353cedf9a8a4f2f2747f1c5c07fcf
SHA25602ef73bd2458627ed7b397ec26ee2de2e92c71a0e7588f78734761d8edbdcd9f
SHA5121b037a2aa8bf951d2ffe2f724aa0b2fbb39c2173215806ba0327bda7b096301d887f9bb7db46f9e04584b16aa6b1aaeaf67f0ecf5f20eb02ceac27c8753ca587
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\Users\Admin\AppData\Local\Temp\C5DF.tmpFilesize
55KB
MD57e37ab34ecdcc3e77e24522ddfd4852d
SHA138e2855e11e353cedf9a8a4f2f2747f1c5c07fcf
SHA25602ef73bd2458627ed7b397ec26ee2de2e92c71a0e7588f78734761d8edbdcd9f
SHA5121b037a2aa8bf951d2ffe2f724aa0b2fbb39c2173215806ba0327bda7b096301d887f9bb7db46f9e04584b16aa6b1aaeaf67f0ecf5f20eb02ceac27c8753ca587
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\Users\Admin\AppData\Local\Temp\C5DF.tmpFilesize
55KB
MD57e37ab34ecdcc3e77e24522ddfd4852d
SHA138e2855e11e353cedf9a8a4f2f2747f1c5c07fcf
SHA25602ef73bd2458627ed7b397ec26ee2de2e92c71a0e7588f78734761d8edbdcd9f
SHA5121b037a2aa8bf951d2ffe2f724aa0b2fbb39c2173215806ba0327bda7b096301d887f9bb7db46f9e04584b16aa6b1aaeaf67f0ecf5f20eb02ceac27c8753ca587
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memory/600-71-0x0000000000000000-mapping.dmp
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memory/1200-55-0x0000000000000000-mapping.dmp
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memory/1200-58-0x00000000001C0000-0x000000000021E000-memory.dmpFilesize
376KB
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memory/1200-64-0x00000000001C0000-0x000000000021E000-memory.dmpFilesize
376KB
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memory/1232-68-0x0000000000000000-mapping.dmp
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memory/1660-54-0x0000000075C51000-0x0000000075C53000-memory.dmpFilesize
8KB
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memory/1724-65-0x0000000000000000-mapping.dmp