Analysis
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max time kernel
150s -
max time network
168s -
platform
windows7_x64 -
resource
win7v20210408 -
submitted
11-08-2021 16:13
Static task
static1
Behavioral task
behavioral1
Sample
PCS.exe
Resource
win7v20210408
General
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Target
PCS.exe
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Size
11.1MB
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MD5
96e9564254f0acc6aa656cb56ab0e94d
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SHA1
b0d63f3ce6bb82c649cbc7a17df774acbf23477d
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SHA256
1a722652518e589be34613b12d419efee2235ff0b0a37556fbb9cda5eb27b1d2
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SHA512
69d05b841c558dfe8f8ad8527e8f9450e68becf50bd0d89e372d8cc8b61770bad6d3a94b22ca858829a613d8c563519d0cc92d13f918274ecacb46799e1103d8
Malware Config
Extracted
darkcomet
Guest16
onlinebonjour1pt.ddns.net:1605
DC_MUTEX-XJRH105
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InstallPath
MSDCSC\msdcsc.exe
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gencode
TeN3mNbzDY1b
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install
true
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offline_keylogger
true
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persistence
true
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reg_key
Microdapt
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
Processes:
PCS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe" PCS.exe -
Modifies security service 2 TTPs 1 IoCs
Processes:
msdcsc.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4" msdcsc.exe -
Executes dropped EXE 2 IoCs
Processes:
msdcsc.exemsdcsc.exepid process 1004 msdcsc.exe 1852 msdcsc.exe -
Loads dropped DLL 2 IoCs
Processes:
PCS.exemsdcsc.exepid process 1556 PCS.exe 1004 msdcsc.exe -
Processes:
msdcsc.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" msdcsc.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" msdcsc.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
PCS.exemsdcsc.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microdapt = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe" PCS.exe Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microdapt = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe" msdcsc.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
PCS.exemsdcsc.exedescription pid process target process PID 1956 set thread context of 1556 1956 PCS.exe PCS.exe PID 1004 set thread context of 1852 1004 msdcsc.exe msdcsc.exe -
autoit_exe 5 IoCs
AutoIT scripts compiled to PE executables.
Processes:
resource yara_rule \Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe autoit_exe C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe autoit_exe C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe autoit_exe \Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe autoit_exe C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe autoit_exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of AdjustPrivilegeToken 46 IoCs
Processes:
PCS.exemsdcsc.exedescription pid process Token: SeIncreaseQuotaPrivilege 1556 PCS.exe Token: SeSecurityPrivilege 1556 PCS.exe Token: SeTakeOwnershipPrivilege 1556 PCS.exe Token: SeLoadDriverPrivilege 1556 PCS.exe Token: SeSystemProfilePrivilege 1556 PCS.exe Token: SeSystemtimePrivilege 1556 PCS.exe Token: SeProfSingleProcessPrivilege 1556 PCS.exe Token: SeIncBasePriorityPrivilege 1556 PCS.exe Token: SeCreatePagefilePrivilege 1556 PCS.exe Token: SeBackupPrivilege 1556 PCS.exe Token: SeRestorePrivilege 1556 PCS.exe Token: SeShutdownPrivilege 1556 PCS.exe Token: SeDebugPrivilege 1556 PCS.exe Token: SeSystemEnvironmentPrivilege 1556 PCS.exe Token: SeChangeNotifyPrivilege 1556 PCS.exe Token: SeRemoteShutdownPrivilege 1556 PCS.exe Token: SeUndockPrivilege 1556 PCS.exe Token: SeManageVolumePrivilege 1556 PCS.exe Token: SeImpersonatePrivilege 1556 PCS.exe Token: SeCreateGlobalPrivilege 1556 PCS.exe Token: 33 1556 PCS.exe Token: 34 1556 PCS.exe Token: 35 1556 PCS.exe Token: SeIncreaseQuotaPrivilege 1852 msdcsc.exe Token: SeSecurityPrivilege 1852 msdcsc.exe Token: SeTakeOwnershipPrivilege 1852 msdcsc.exe Token: SeLoadDriverPrivilege 1852 msdcsc.exe Token: SeSystemProfilePrivilege 1852 msdcsc.exe Token: SeSystemtimePrivilege 1852 msdcsc.exe Token: SeProfSingleProcessPrivilege 1852 msdcsc.exe Token: SeIncBasePriorityPrivilege 1852 msdcsc.exe Token: SeCreatePagefilePrivilege 1852 msdcsc.exe Token: SeBackupPrivilege 1852 msdcsc.exe Token: SeRestorePrivilege 1852 msdcsc.exe Token: SeShutdownPrivilege 1852 msdcsc.exe Token: SeDebugPrivilege 1852 msdcsc.exe Token: SeSystemEnvironmentPrivilege 1852 msdcsc.exe Token: SeChangeNotifyPrivilege 1852 msdcsc.exe Token: SeRemoteShutdownPrivilege 1852 msdcsc.exe Token: SeUndockPrivilege 1852 msdcsc.exe Token: SeManageVolumePrivilege 1852 msdcsc.exe Token: SeImpersonatePrivilege 1852 msdcsc.exe Token: SeCreateGlobalPrivilege 1852 msdcsc.exe Token: 33 1852 msdcsc.exe Token: 34 1852 msdcsc.exe Token: 35 1852 msdcsc.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
msdcsc.exepid process 1852 msdcsc.exe -
Suspicious use of WriteProcessMemory 55 IoCs
Processes:
PCS.exePCS.execmd.execmd.exemsdcsc.exemsdcsc.exedescription pid process target process PID 1956 wrote to memory of 1556 1956 PCS.exe PCS.exe PID 1956 wrote to memory of 1556 1956 PCS.exe PCS.exe PID 1956 wrote to memory of 1556 1956 PCS.exe PCS.exe PID 1956 wrote to memory of 1556 1956 PCS.exe PCS.exe PID 1956 wrote to memory of 1556 1956 PCS.exe PCS.exe PID 1956 wrote to memory of 1556 1956 PCS.exe PCS.exe PID 1556 wrote to memory of 1704 1556 PCS.exe cmd.exe PID 1556 wrote to memory of 1704 1556 PCS.exe cmd.exe PID 1556 wrote to memory of 1704 1556 PCS.exe cmd.exe PID 1556 wrote to memory of 1704 1556 PCS.exe cmd.exe PID 1556 wrote to memory of 340 1556 PCS.exe cmd.exe PID 1556 wrote to memory of 340 1556 PCS.exe cmd.exe PID 1556 wrote to memory of 340 1556 PCS.exe cmd.exe PID 1556 wrote to memory of 340 1556 PCS.exe cmd.exe PID 340 wrote to memory of 1644 340 cmd.exe attrib.exe PID 340 wrote to memory of 1644 340 cmd.exe attrib.exe PID 340 wrote to memory of 1644 340 cmd.exe attrib.exe PID 340 wrote to memory of 1644 340 cmd.exe attrib.exe PID 1704 wrote to memory of 1384 1704 cmd.exe attrib.exe PID 1704 wrote to memory of 1384 1704 cmd.exe attrib.exe PID 1704 wrote to memory of 1384 1704 cmd.exe attrib.exe PID 1704 wrote to memory of 1384 1704 cmd.exe attrib.exe PID 1556 wrote to memory of 1004 1556 PCS.exe msdcsc.exe PID 1556 wrote to memory of 1004 1556 PCS.exe msdcsc.exe PID 1556 wrote to memory of 1004 1556 PCS.exe msdcsc.exe PID 1556 wrote to memory of 1004 1556 PCS.exe msdcsc.exe PID 1004 wrote to memory of 1852 1004 msdcsc.exe msdcsc.exe PID 1004 wrote to memory of 1852 1004 msdcsc.exe msdcsc.exe PID 1004 wrote to memory of 1852 1004 msdcsc.exe msdcsc.exe PID 1004 wrote to memory of 1852 1004 msdcsc.exe msdcsc.exe PID 1004 wrote to memory of 1852 1004 msdcsc.exe msdcsc.exe PID 1004 wrote to memory of 1852 1004 msdcsc.exe msdcsc.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe PID 1852 wrote to memory of 1212 1852 msdcsc.exe notepad.exe -
Views/modifies file attributes 1 TTPs 2 IoCs
Processes:
attrib.exeattrib.exepid process 1644 attrib.exe 1384 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\PCS.exe"C:\Users\Admin\AppData\Local\Temp\PCS.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\PCS.exe"C:\Users\Admin\AppData\Local\Temp\PCS.exe"2⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\PCS.exe" +s +h3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp\PCS.exe" +s +h4⤵
- Views/modifies file attributes
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp" +s +h4⤵
- Views/modifies file attributes
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C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"4⤵
- Modifies security service
- Executes dropped EXE
- Windows security modification
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\notepad.exenotepad5⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exeMD5
96e9564254f0acc6aa656cb56ab0e94d
SHA1b0d63f3ce6bb82c649cbc7a17df774acbf23477d
SHA2561a722652518e589be34613b12d419efee2235ff0b0a37556fbb9cda5eb27b1d2
SHA51269d05b841c558dfe8f8ad8527e8f9450e68becf50bd0d89e372d8cc8b61770bad6d3a94b22ca858829a613d8c563519d0cc92d13f918274ecacb46799e1103d8
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C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exeMD5
96e9564254f0acc6aa656cb56ab0e94d
SHA1b0d63f3ce6bb82c649cbc7a17df774acbf23477d
SHA2561a722652518e589be34613b12d419efee2235ff0b0a37556fbb9cda5eb27b1d2
SHA51269d05b841c558dfe8f8ad8527e8f9450e68becf50bd0d89e372d8cc8b61770bad6d3a94b22ca858829a613d8c563519d0cc92d13f918274ecacb46799e1103d8
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C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exeMD5
96e9564254f0acc6aa656cb56ab0e94d
SHA1b0d63f3ce6bb82c649cbc7a17df774acbf23477d
SHA2561a722652518e589be34613b12d419efee2235ff0b0a37556fbb9cda5eb27b1d2
SHA51269d05b841c558dfe8f8ad8527e8f9450e68becf50bd0d89e372d8cc8b61770bad6d3a94b22ca858829a613d8c563519d0cc92d13f918274ecacb46799e1103d8
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\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exeMD5
96e9564254f0acc6aa656cb56ab0e94d
SHA1b0d63f3ce6bb82c649cbc7a17df774acbf23477d
SHA2561a722652518e589be34613b12d419efee2235ff0b0a37556fbb9cda5eb27b1d2
SHA51269d05b841c558dfe8f8ad8527e8f9450e68becf50bd0d89e372d8cc8b61770bad6d3a94b22ca858829a613d8c563519d0cc92d13f918274ecacb46799e1103d8
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\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exeMD5
96e9564254f0acc6aa656cb56ab0e94d
SHA1b0d63f3ce6bb82c649cbc7a17df774acbf23477d
SHA2561a722652518e589be34613b12d419efee2235ff0b0a37556fbb9cda5eb27b1d2
SHA51269d05b841c558dfe8f8ad8527e8f9450e68becf50bd0d89e372d8cc8b61770bad6d3a94b22ca858829a613d8c563519d0cc92d13f918274ecacb46799e1103d8
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memory/340-66-0x0000000000000000-mapping.dmp
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memory/1004-70-0x0000000000000000-mapping.dmp
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memory/1212-83-0x0000000000020000-0x0000000000021000-memory.dmpFilesize
4KB
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memory/1212-81-0x0000000000000000-mapping.dmp
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memory/1384-68-0x0000000000000000-mapping.dmp
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memory/1556-63-0x00000000000C0000-0x0000000000172000-memory.dmpFilesize
712KB
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memory/1556-64-0x0000000000230000-0x0000000000231000-memory.dmpFilesize
4KB
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memory/1556-61-0x000000000014F888-mapping.dmp
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memory/1556-60-0x00000000000C0000-0x0000000000172000-memory.dmpFilesize
712KB
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memory/1644-67-0x0000000000000000-mapping.dmp
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memory/1704-65-0x0000000000000000-mapping.dmp
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memory/1852-79-0x00000000000C0000-0x0000000000172000-memory.dmpFilesize
712KB
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memory/1852-80-0x00000000003E0000-0x00000000003E1000-memory.dmpFilesize
4KB
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memory/1852-76-0x000000000014F888-mapping.dmp
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memory/1956-59-0x0000000075DA1000-0x0000000075DA3000-memory.dmpFilesize
8KB