Analysis
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max time kernel
163s -
max time network
169s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220113 -
submitted
16-02-2022 22:33
Static task
static1
Behavioral task
behavioral1
Sample
f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe
Resource
win10v2004-en-20220113
General
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Target
f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe
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Size
480KB
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MD5
bf2e43ff8542e73c1b27291e0df06afd
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SHA1
c542becdc2a6dd650c49f9e73adf9e32a998a62f
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SHA256
f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49
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SHA512
e26bccfd5052a153a87219c98cb4ac4ad3f74017febd4052eba55ac92852a132a33851d65e695de0a578c8d0cb5d1d17da831e75bff378dd2dab341a287dde99
Malware Config
Extracted
C:\DECRYPT-FILES.txt
maze
http://aoacugmutagkwctu.onion/8802099c541a2d68
https://mazedecrypt.top/8802099c541a2d68
Signatures
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Maze
Ransomware family also known as ChaCha.
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Modifies extensions of user files 5 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\CompareGroup.png => C:\Users\Admin\Pictures\CompareGroup.png.eEA6y f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe File renamed C:\Users\Admin\Pictures\ConfirmUnpublish.tif => C:\Users\Admin\Pictures\ConfirmUnpublish.tif.eEA6y f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe File renamed C:\Users\Admin\Pictures\ConvertToSwitch.raw => C:\Users\Admin\Pictures\ConvertToSwitch.raw.LWkam f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe File renamed C:\Users\Admin\Pictures\SaveExpand.png => C:\Users\Admin\Pictures\SaveExpand.png.o9LEYpq f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe File renamed C:\Users\Admin\Pictures\UnblockSkip.raw => C:\Users\Admin\Pictures\UnblockSkip.raw.HkTy f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe -
Drops startup file 4 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\DECRYPT-FILES.txt f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lee1g3wz.tmp f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\DECRYPT-FILES.txt f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\lee1g3wz.tmp f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.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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Drops file in Windows directory 8 IoCs
description ioc Process File opened for modification C:\Windows\WindowsUpdate.log svchost.exe File opened for modification C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk svchost.exe File opened for modification C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log svchost.exe File opened for modification C:\Windows\SoftwareDistribution\DataStore\DataStore.edb svchost.exe File opened for modification C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm svchost.exe File opened for modification C:\Windows\SoftwareDistribution\ReportingEvents.log svchost.exe File opened for modification C:\Windows\Logs\CBS\CBS.log TiWorker.exe File opened for modification C:\Windows\WinSxS\pending.xml TiWorker.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4676 f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe 4676 f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe -
Suspicious use of AdjustPrivilegeToken 33 IoCs
description pid Process Token: SeShutdownPrivilege 4212 svchost.exe Token: SeCreatePagefilePrivilege 4212 svchost.exe Token: SeShutdownPrivilege 4212 svchost.exe Token: SeCreatePagefilePrivilege 4212 svchost.exe Token: SeShutdownPrivilege 4212 svchost.exe Token: SeCreatePagefilePrivilege 4212 svchost.exe Token: SeBackupPrivilege 3556 vssvc.exe Token: SeRestorePrivilege 3556 vssvc.exe Token: SeAuditPrivilege 3556 vssvc.exe Token: SeSecurityPrivilege 3392 TiWorker.exe Token: SeRestorePrivilege 3392 TiWorker.exe Token: SeBackupPrivilege 3392 TiWorker.exe Token: SeBackupPrivilege 3392 TiWorker.exe Token: SeRestorePrivilege 3392 TiWorker.exe Token: SeSecurityPrivilege 3392 TiWorker.exe Token: SeBackupPrivilege 3392 TiWorker.exe Token: SeRestorePrivilege 3392 TiWorker.exe Token: SeSecurityPrivilege 3392 TiWorker.exe Token: SeBackupPrivilege 3392 TiWorker.exe Token: SeRestorePrivilege 3392 TiWorker.exe Token: SeSecurityPrivilege 3392 TiWorker.exe Token: SeBackupPrivilege 3392 TiWorker.exe Token: SeRestorePrivilege 3392 TiWorker.exe Token: SeSecurityPrivilege 3392 TiWorker.exe Token: SeBackupPrivilege 3392 TiWorker.exe Token: SeRestorePrivilege 3392 TiWorker.exe Token: SeSecurityPrivilege 3392 TiWorker.exe Token: SeBackupPrivilege 3392 TiWorker.exe Token: SeRestorePrivilege 3392 TiWorker.exe Token: SeSecurityPrivilege 3392 TiWorker.exe Token: SeBackupPrivilege 3392 TiWorker.exe Token: SeRestorePrivilege 3392 TiWorker.exe Token: SeSecurityPrivilege 3392 TiWorker.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe"C:\Users\Admin\AppData\Local\Temp\f491fb72f106e879021b0bb1149c4678fb380c255d2ef11ac4e0897378793f49.exe"1⤵
- Modifies extensions of user files
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
PID:4676
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:4212
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3556
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C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exeC:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:3392