Analysis
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max time kernel
168s -
max time network
181s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220113 -
submitted
16-02-2022 23:00
Static task
static1
Behavioral task
behavioral1
Sample
4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe
Resource
win10v2004-en-20220113
General
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Target
4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe
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Size
354KB
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MD5
09e61348c89279d1f31159cc152a33ac
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SHA1
1fc77fba10690bf81fa0b25ff1d74b23ff092d7e
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SHA256
4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69
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SHA512
fdcdf8a50118f8cf2f379d755bdfc5c1c9c3ffa3fc333fc98ad9b24f4894763dfdb82c33e7edf6849b8c50c7b403f2a5ce64dd0935724c7cf9b973761ff237c7
Malware Config
Extracted
C:\DECRYPT-FILES.txt
maze
http://aoacugmutagkwctu.onion/8802099c24db24c5
https://mazedecrypt.top/8802099c24db24c5
Signatures
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Maze
Ransomware family also known as ChaCha.
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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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.bY5F 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe File renamed C:\Users\Admin\Pictures\ConfirmUnpublish.tif => C:\Users\Admin\Pictures\ConfirmUnpublish.tif.bY5F 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe File renamed C:\Users\Admin\Pictures\ConvertToSwitch.raw => C:\Users\Admin\Pictures\ConvertToSwitch.raw.PTi3 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe File renamed C:\Users\Admin\Pictures\SaveExpand.png => C:\Users\Admin\Pictures\SaveExpand.png.mMfXD 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe File renamed C:\Users\Admin\Pictures\UnblockSkip.raw => C:\Users\Admin\Pictures\UnblockSkip.raw.mMfXD 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.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 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nr9k9ycj.tmp 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\DECRYPT-FILES.txt 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\nr9k9ycj.tmp 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.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 6 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 -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 784 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe 784 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe -
Suspicious use of AdjustPrivilegeToken 9 IoCs
description pid Process Token: SeBackupPrivilege 3160 vssvc.exe Token: SeRestorePrivilege 3160 vssvc.exe Token: SeAuditPrivilege 3160 vssvc.exe Token: SeShutdownPrivilege 2984 svchost.exe Token: SeCreatePagefilePrivilege 2984 svchost.exe Token: SeShutdownPrivilege 2984 svchost.exe Token: SeCreatePagefilePrivilege 2984 svchost.exe Token: SeShutdownPrivilege 2984 svchost.exe Token: SeCreatePagefilePrivilege 2984 svchost.exe -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 784 wrote to memory of 4108 784 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe 104 PID 784 wrote to memory of 4108 784 4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe 104
Processes
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C:\Users\Admin\AppData\Local\Temp\4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe"C:\Users\Admin\AppData\Local\Temp\4feb2e00c0dc0c42f42fd2c93f48e350c37386768e7774f82cdc98c8bc8dbc69.exe"1⤵
- Modifies extensions of user files
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:784 -
C:\Windows\system32\wbem\wmic.exe"C:\tnq\kon\..\..\Windows\aepjc\..\system32\onf\dndl\cpsg\..\..\..\wbem\oue\pugca\jisd\..\..\..\wmic.exe" shadowcopy delete2⤵PID:4108
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3160
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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:2984