Analysis
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max time kernel
133s -
max time network
103s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
29-06-2024 04:25
Behavioral task
behavioral1
Sample
w.exe
Resource
win7-20240611-en
windows7-x64
Behavioral task
behavioral2
Sample
w.exe
Resource
win10v2004-20240611-en
windows10-2004-x64
General
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Target
w.exe
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Size
147KB
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MD5
a076dd9346194f5ce76c015fe9daae49
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SHA1
395393bde77493a8ca1df57e1c10466f0c45a2b5
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SHA256
cf8844cbd945f7e42a001758cd9807776cf219902b802f2860ac2b59b4282967
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SHA512
04c086a9cebb6f0bac69e4a68097e8bd6a539683c947ccad1c4e15601d4c25547c8756fdeeb8e45708915f74393fe91a38af05657d3ae13f374d2e390df812d4
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SSDEEP
1536:9zICS4AAwczUUf8y8gvMH+1zGSNAojMP95D1xDu+OBVJ8wRy+k3E7WYQWEZHUyz:uqJogYkcSNm9V7DxOnJ8OyRU7WYaHT
Malware Config
Extracted
C:\lYEPThbqY.README.txt
Signatures
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Renames multiple (549) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
593C.tmpdescription ioc Process Key value queried \REGISTRY\USER\S-1-5-21-4204450073-1267028356-951339405-1000\Control Panel\International\Geo\Nation 593C.tmp -
Deletes itself 1 IoCs
Processes:
593C.tmppid Process 3660 593C.tmp -
Executes dropped EXE 1 IoCs
Processes:
593C.tmppid Process 3660 593C.tmp -
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 desktop.ini file(s) 2 IoCs
Processes:
w.exedescription ioc Process File opened for modification C:\$Recycle.Bin\S-1-5-21-4204450073-1267028356-951339405-1000\desktop.ini w.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-4204450073-1267028356-951339405-1000\desktop.ini w.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
Processes:
593C.tmppid Process 3660 593C.tmp -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
w.exepid Process 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe 3104 w.exe -
Suspicious behavior: RenamesItself 26 IoCs
Processes:
593C.tmppid Process 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp 3660 593C.tmp -
Suspicious use of AdjustPrivilegeToken 64 IoCs
Processes:
w.exedescription pid Process Token: SeAssignPrimaryTokenPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeDebugPrivilege 3104 w.exe Token: 36 3104 w.exe Token: SeImpersonatePrivilege 3104 w.exe Token: SeIncBasePriorityPrivilege 3104 w.exe Token: SeIncreaseQuotaPrivilege 3104 w.exe Token: 33 3104 w.exe Token: SeManageVolumePrivilege 3104 w.exe Token: SeProfSingleProcessPrivilege 3104 w.exe Token: SeRestorePrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSystemProfilePrivilege 3104 w.exe Token: SeTakeOwnershipPrivilege 3104 w.exe Token: SeShutdownPrivilege 3104 w.exe Token: SeDebugPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeBackupPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe Token: SeSecurityPrivilege 3104 w.exe -
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
w.exe593C.tmpdescription pid Process procid_target PID 3104 wrote to memory of 3660 3104 w.exe 92 PID 3104 wrote to memory of 3660 3104 w.exe 92 PID 3104 wrote to memory of 3660 3104 w.exe 92 PID 3104 wrote to memory of 3660 3104 w.exe 92 PID 3660 wrote to memory of 3476 3660 593C.tmp 93 PID 3660 wrote to memory of 3476 3660 593C.tmp 93 PID 3660 wrote to memory of 3476 3660 593C.tmp 93
Processes
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C:\Users\Admin\AppData\Local\Temp\w.exe"C:\Users\Admin\AppData\Local\Temp\w.exe"1⤵
- Drops desktop.ini file(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3104 -
C:\ProgramData\593C.tmp"C:\ProgramData\593C.tmp"2⤵
- Checks computer location settings
- Deletes itself
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:3660 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\593C.tmp >> NUL3⤵PID:3476
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
129B
MD52c97793aa888df64cb92605ef62097d8
SHA1fce1133307c2c4df529a3f5ec17d3f1ed37e3f2b
SHA2567e9021896d5051205a88c2bf3c969510b0c1a0565dcb1a73c5abfcfd5c2179aa
SHA512641caf65329193f8a7ab7054e03f494080f686d550d81281b426cc25f368e3c3e4e28611e1875a34f9847f9d04044b794979361f067c6a80990634e7af8c378a
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Filesize
14KB
MD5294e9f64cb1642dd89229fff0592856b
SHA197b148c27f3da29ba7b18d6aee8a0db9102f47c9
SHA256917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
SHA512b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf
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Filesize
147KB
MD510619cc47c916f0c8199f063b3532c7a
SHA1d4a1ca2d412b086351f2de64ca0cf9c8dde3e4cd
SHA25652926fb793721755529b4383aded9ed79689c47b5def62f87075679b9878b509
SHA512bec5d7c04111765b3f2ca54ae13f021d22367297d7e9eb8130e8087540e280e4038b13d2ac4800695703a58ca55fe5a107284acd3fa5168356daabc348c4b408
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Filesize
1KB
MD5dacad7942139d7c0f4dafab58837d7a2
SHA1424261a69795e01741eb143419e36ef52421a2d0
SHA2564925fdf22c5e0935ccf5f989085508dd64f0cb2ed0efa0d22a571117d0e70c2a
SHA51275ac3030fa5b60c5335244d966470e4e5c68c3a94adfa464a7804cf98fc891fefc8c50d85dc1163b350990a6a4007d83996efd7034e9f9e38a9ea65fe392dfb6
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Filesize
129B
MD595fb38b4a684d8300ee04a5d46a0c9d5
SHA1fde78dda18ab31887659c6b92697abf407baf618
SHA256fdc43729ee43bbe46dc87a95fe8eeeb761d9142ac4a0d149ad4ccb4be52f8c48
SHA5129e21a752087df3d1baae18f08fee3a4d12a904b84403c96453e73ecc7fc0b9c4ff12347129c13d633b9454bd227b3d0ddfd0f7298e0faac09f6de6b55a1bf015