Analysis
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max time kernel
150s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
05-05-2023 20:56
Behavioral task
behavioral1
Sample
rundll64.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
rundll64.exe
Resource
win10v2004-20230220-en
General
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Target
rundll64.exe
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Size
236KB
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MD5
4165a3dba3c7ac26b225f8623f70ebaa
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SHA1
587df43d63da7dfd726a4bb8f39877647cc07da0
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SHA256
523d97331fcef84ff767dbb01836766d8b1be9bbeb3d76e9fda3a02ad46fd976
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SHA512
43ad74651aad95f16bd17f6fea857534c6c6502cb0c06262092e7b10ab59a27b663565668d6fd4436c72a114f632ab6940fc4f1914d165eba7e5a8a8b5743b8e
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SSDEEP
6144:qb/A0SeQu0hL2cyBt2iOjese1HSCRhECwt6:q8D5P2ICsDCRhQ6
Malware Config
Signatures
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Phobos
Phobos ransomware appeared at the beginning of 2019.
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
Processes:
bcdedit.exebcdedit.exepid process 3788 bcdedit.exe 3840 bcdedit.exe -
Processes:
wbadmin.exepid process 1224 wbadmin.exe -
Modifies Windows Firewall 1 TTPs 2 IoCs
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Drops startup file 1 IoCs
Processes:
rundll64.exedescription ioc process File created \??\c:\users\admin\appdata\roaming\microsoft\windows\start menu\programs\startup\rundll64.exe rundll64.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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Adds Run key to start application 2 TTPs 2 IoCs
Processes:
rundll64.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rundll64 = "C:\\Users\\Admin\\AppData\\Local\\rundll64.exe" rundll64.exe Set value (str) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rundll64 = "C:\\Users\\Admin\\AppData\\Local\\rundll64.exe" rundll64.exe -
Drops desktop.ini file(s) 2 IoCs
Processes:
rundll64.exedescription ioc process File opened for modification C:\$Recycle.Bin\S-1-5-21-1013461898-3711306144-4198452673-1000\desktop.ini rundll64.exe File opened for modification C:\Program Files\desktop.ini rundll64.exe -
Drops file in Program Files directory 64 IoCs
Processes:
rundll64.exedescription ioc process File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\symbols\symbase.xml rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\MSInfo\fr-FR\msinfo32.exe.mui rundll64.exe File opened for modification C:\Program Files\Common Files\System\msadc\es-ES\msadcor.dll.mui rundll64.exe File opened for modification C:\Program Files\7-Zip\Lang\tt.txt rundll64.exe File created C:\Program Files\7-Zip\Lang\yo.txt.id[373E8E06-3093].[[email protected]].eking rundll64.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-environment-l1-1-0.dll.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.kk-kz.dll rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.ro-ro.dll rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\main\base_ca.xml rundll64.exe File created C:\Program Files\7-Zip\Lang\bn.txt.id[373E8E06-3093].[[email protected]].eking rundll64.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVClient.man.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\Common Files\System\msadc\es-ES\msaddsr.dll.mui rundll64.exe File opened for modification C:\Program Files\CompareStep.cab rundll64.exe File created C:\Program Files\7-Zip\Lang\th.txt.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\it-IT\tabskb.dll.mui rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\VSTO\vstoee90.tlb rundll64.exe File opened for modification C:\Program Files\Common Files\System\ado\msadomd28.tlb rundll64.exe File opened for modification C:\Program Files\Common Files\System\msadc\msadce.dll rundll64.exe File created C:\Program Files\7-Zip\Lang\fr.txt.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\ipscat.xml rundll64.exe File opened for modification C:\Program Files\Google\Chrome\Application\106.0.5249.119\chrome.dll.sig rundll64.exe File created C:\Program Files\Google\Chrome\Application\106.0.5249.119\chrome_200_percent.pak.id[373E8E06-3093].[[email protected]].eking rundll64.exe File created C:\Program Files\Google\Chrome\Application\106.0.5249.119\Locales\lt.pak.id[373E8E06-3093].[[email protected]].eking rundll64.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\offreg.dll.id[373E8E06-3093].[[email protected]].eking rundll64.exe File created C:\Program Files\Common Files\microsoft shared\VSTO\10.0\VSTOInstaller.exe.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\Common Files\System\ado\msado60.tlb rundll64.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\i640.hash.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\tipskins.dll rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\VC\msdia90.dll rundll64.exe File opened for modification C:\Program Files\Common Files\System\wab32res.dll rundll64.exe File created C:\Program Files\7-Zip\Lang\bg.txt.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\7-Zip\Lang\gu.txt rundll64.exe File created C:\Program Files\7-Zip\Lang\tr.txt.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\7-Zip\Lang\lv.txt rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\ClientEventLogMessages.man rundll64.exe File opened for modification C:\Program Files\7-Zip\Lang\kk.txt rundll64.exe File created C:\Program Files\7-Zip\Lang\lt.txt.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\ShapeCollector.exe rundll64.exe File opened for modification C:\Program Files\Common Files\System\msadc\en-US\msdaremr.dll.mui rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.fr-fr.dll rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\VSTO\10.0\1033\VSTOLoaderUI.dll rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\it-IT\TipTsf.dll.mui rundll64.exe File created C:\Program Files\Common Files\microsoft shared\OFFICE16\Office Setup Controller\pkeyconfig.companion.dll.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\Common Files\System\msadc\fr-FR\msaddsr.dll.mui rundll64.exe File opened for modification C:\Program Files\Common Files\System\Ole DB\msxactps.dll rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\insert.xml rundll64.exe File created C:\Program Files\7-Zip\Lang\sr-spc.txt.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\ipssrl.xml rundll64.exe File opened for modification C:\Program Files\7-Zip\Lang\cy.txt rundll64.exe File opened for modification C:\Program Files\Google\Chrome\Application\106.0.5249.119\Extensions\external_extensions.json rundll64.exe File opened for modification C:\Program Files\Google\Chrome\Application\106.0.5249.119\Locales\am.pak rundll64.exe File created C:\Program Files\Google\Chrome\Application\106.0.5249.119\Locales\hu.pak.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fr-CA\tipresx.dll.mui rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\ipsfin.xml rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.fi-fi.dll rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-core-file-l1-2-0.dll rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\OFFICE16\Office Setup Controller\pkeyconfig-office.xrm-ms rundll64.exe File created C:\Program Files\7-Zip\Lang\lij.txt.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\vccorlib140.dll rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.lt-lt.dll rundll64.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\ucrtbase.dll.id[373E8E06-3093].[[email protected]].eking rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\en-US\InkObj.dll.mui rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.sl-si.dll rundll64.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\auxpad.xml rundll64.exe -
Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 4684 2832 WerFault.exe rundll64.exe -
Checks SCSI registry key(s) 3 TTPs 4 IoCs
SCSI information is often read in order to detect sandboxing environments.
Processes:
vds.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_DADY&PROD_HARDDISK\4&215468A5&0&000000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName vds.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_DADY&PROD_DADY_DVD-ROM\4&215468A5&0&010000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\FriendlyName vds.exe -
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
Processes:
vssadmin.exepid process 4624 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
rundll64.exepid process 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe 3340 rundll64.exe -
Suspicious use of AdjustPrivilegeToken 49 IoCs
Processes:
rundll64.exevssvc.exeWMIC.exewbengine.exedescription pid process Token: SeDebugPrivilege 3340 rundll64.exe Token: SeBackupPrivilege 3820 vssvc.exe Token: SeRestorePrivilege 3820 vssvc.exe Token: SeAuditPrivilege 3820 vssvc.exe Token: SeIncreaseQuotaPrivilege 5048 WMIC.exe Token: SeSecurityPrivilege 5048 WMIC.exe Token: SeTakeOwnershipPrivilege 5048 WMIC.exe Token: SeLoadDriverPrivilege 5048 WMIC.exe Token: SeSystemProfilePrivilege 5048 WMIC.exe Token: SeSystemtimePrivilege 5048 WMIC.exe Token: SeProfSingleProcessPrivilege 5048 WMIC.exe Token: SeIncBasePriorityPrivilege 5048 WMIC.exe Token: SeCreatePagefilePrivilege 5048 WMIC.exe Token: SeBackupPrivilege 5048 WMIC.exe Token: SeRestorePrivilege 5048 WMIC.exe Token: SeShutdownPrivilege 5048 WMIC.exe Token: SeDebugPrivilege 5048 WMIC.exe Token: SeSystemEnvironmentPrivilege 5048 WMIC.exe Token: SeRemoteShutdownPrivilege 5048 WMIC.exe Token: SeUndockPrivilege 5048 WMIC.exe Token: SeManageVolumePrivilege 5048 WMIC.exe Token: 33 5048 WMIC.exe Token: 34 5048 WMIC.exe Token: 35 5048 WMIC.exe Token: 36 5048 WMIC.exe Token: SeIncreaseQuotaPrivilege 5048 WMIC.exe Token: SeSecurityPrivilege 5048 WMIC.exe Token: SeTakeOwnershipPrivilege 5048 WMIC.exe Token: SeLoadDriverPrivilege 5048 WMIC.exe Token: SeSystemProfilePrivilege 5048 WMIC.exe Token: SeSystemtimePrivilege 5048 WMIC.exe Token: SeProfSingleProcessPrivilege 5048 WMIC.exe Token: SeIncBasePriorityPrivilege 5048 WMIC.exe Token: SeCreatePagefilePrivilege 5048 WMIC.exe Token: SeBackupPrivilege 5048 WMIC.exe Token: SeRestorePrivilege 5048 WMIC.exe Token: SeShutdownPrivilege 5048 WMIC.exe Token: SeDebugPrivilege 5048 WMIC.exe Token: SeSystemEnvironmentPrivilege 5048 WMIC.exe Token: SeRemoteShutdownPrivilege 5048 WMIC.exe Token: SeUndockPrivilege 5048 WMIC.exe Token: SeManageVolumePrivilege 5048 WMIC.exe Token: 33 5048 WMIC.exe Token: 34 5048 WMIC.exe Token: 35 5048 WMIC.exe Token: 36 5048 WMIC.exe Token: SeBackupPrivilege 4104 wbengine.exe Token: SeRestorePrivilege 4104 wbengine.exe Token: SeSecurityPrivilege 4104 wbengine.exe -
Suspicious use of WriteProcessMemory 18 IoCs
Processes:
rundll64.execmd.execmd.exedescription pid process target process PID 3340 wrote to memory of 2012 3340 rundll64.exe cmd.exe PID 3340 wrote to memory of 2012 3340 rundll64.exe cmd.exe PID 3340 wrote to memory of 4180 3340 rundll64.exe cmd.exe PID 3340 wrote to memory of 4180 3340 rundll64.exe cmd.exe PID 4180 wrote to memory of 4676 4180 cmd.exe netsh.exe PID 4180 wrote to memory of 4676 4180 cmd.exe netsh.exe PID 2012 wrote to memory of 4624 2012 cmd.exe vssadmin.exe PID 2012 wrote to memory of 4624 2012 cmd.exe vssadmin.exe PID 4180 wrote to memory of 1244 4180 cmd.exe netsh.exe PID 4180 wrote to memory of 1244 4180 cmd.exe netsh.exe PID 2012 wrote to memory of 5048 2012 cmd.exe WMIC.exe PID 2012 wrote to memory of 5048 2012 cmd.exe WMIC.exe PID 2012 wrote to memory of 3788 2012 cmd.exe bcdedit.exe PID 2012 wrote to memory of 3788 2012 cmd.exe bcdedit.exe PID 2012 wrote to memory of 3840 2012 cmd.exe bcdedit.exe PID 2012 wrote to memory of 3840 2012 cmd.exe bcdedit.exe PID 2012 wrote to memory of 1224 2012 cmd.exe wbadmin.exe PID 2012 wrote to memory of 1224 2012 cmd.exe wbadmin.exe -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\rundll64.exe"C:\Users\Admin\AppData\Local\Temp\rundll64.exe"1⤵
- Drops startup file
- Adds Run key to start application
- Drops desktop.ini file(s)
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3340 -
C:\Users\Admin\AppData\Local\Temp\rundll64.exe"C:\Users\Admin\AppData\Local\Temp\rundll64.exe"2⤵PID:2832
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2832 -s 4603⤵
- Program crash
PID:4684
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:4180 -
C:\Windows\system32\netsh.exenetsh advfirewall set currentprofile state off3⤵
- Modifies Windows Firewall
PID:4676
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C:\Windows\system32\netsh.exenetsh firewall set opmode mode=disable3⤵
- Modifies Windows Firewall
PID:1244
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:2012 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet3⤵
- Interacts with shadow copies
PID:4624
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete3⤵
- Suspicious use of AdjustPrivilegeToken
PID:5048
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C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures3⤵
- Modifies boot configuration data using bcdedit
PID:3788
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no3⤵
- Modifies boot configuration data using bcdedit
PID:3840
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C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet3⤵
- Deletes backup catalog
PID:1224
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2832 -ip 28321⤵PID:3740
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3820
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4104
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:4912
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:1200
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
49KB
MD52f244a56091c9705794e92e6bcc38058
SHA13f2b518be764f29c66ba8564d1be8f4309cce747
SHA256e322feefa8d4c76d8749f88c9b877e3e119418c4ac0b18a8cfb7260638cc588d
SHA5123ee3835abfec9c2db4ba1f33b5e59db2400e712d5dd7cde82a12889ea1beab8ac85b923ec0447e81b3d2ce3ebd14922882653f5bcdcc81a29f225acfa4872572