Analysis
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max time kernel
151s -
max time network
46s -
platform
windows7_x64 -
resource
win7-20220718-en -
resource tags
arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system -
submitted
25-07-2022 02:15
Behavioral task
behavioral1
Sample
19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Resource
win7-20220718-en
General
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Target
19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
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Size
253KB
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MD5
f4a3645aaaa7b14f4dec9a9f2db0040e
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SHA1
8430b2a225c8890a354024eb3273e5a21924aac2
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SHA256
19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c
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SHA512
c14c8aeb6147ad25f5089ff275762f21b066e781c7c2777a055adf11c15549e6dee729e577333d1221b6c61d3731c3824aeb0328650103c6edc77bf9a0cb18f1
Malware Config
Extracted
darkcomet
Guest16
127.0.0.1:888
DC_MUTEX-3Y5WKVN
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InstallPath
MSDCSC\msdcsc.exe
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gencode
ELdwUcYkBbef
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install
true
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offline_keylogger
true
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persistence
false
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reg_key
MicroUpdate
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
Processes:
19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe -
Modifies firewall policy service 2 TTPs 3 IoCs
Processes:
msdcsc.exedescription ioc process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile msdcsc.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" msdcsc.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0" msdcsc.exe -
Disables RegEdit via registry modification 1 IoCs
Processes:
msdcsc.exedescription ioc process Set value (int) \REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" msdcsc.exe -
Disables Task Manager via registry modification
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Executes dropped EXE 1 IoCs
Processes:
msdcsc.exepid process 1304 msdcsc.exe -
Sets file to hidden 1 TTPs 2 IoCs
Modifies file attributes to stop it showing in Explorer etc.
Processes:
attrib.exeattrib.exepid process 1152 attrib.exe 1292 attrib.exe -
Processes:
resource yara_rule behavioral1/memory/1636-55-0x0000000000400000-0x00000000004BA000-memory.dmp upx \Users\Admin\Documents\MSDCSC\msdcsc.exe upx \Users\Admin\Documents\MSDCSC\msdcsc.exe upx C:\Users\Admin\Documents\MSDCSC\msdcsc.exe upx behavioral1/memory/1636-65-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral1/memory/1304-68-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral1/memory/1304-69-0x0000000000400000-0x00000000004BA000-memory.dmp upx -
Loads dropped DLL 2 IoCs
Processes:
19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exepid process 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
msdcsc.exepid process 1304 msdcsc.exe -
Suspicious use of AdjustPrivilegeToken 46 IoCs
Processes:
19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exemsdcsc.exedescription pid process Token: SeIncreaseQuotaPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeSecurityPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeTakeOwnershipPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeLoadDriverPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeSystemProfilePrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeSystemtimePrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeProfSingleProcessPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeIncBasePriorityPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeCreatePagefilePrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeBackupPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeRestorePrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeShutdownPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeDebugPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeSystemEnvironmentPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeChangeNotifyPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeRemoteShutdownPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeUndockPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeManageVolumePrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeImpersonatePrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeCreateGlobalPrivilege 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: 33 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: 34 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: 35 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe Token: SeIncreaseQuotaPrivilege 1304 msdcsc.exe Token: SeSecurityPrivilege 1304 msdcsc.exe Token: SeTakeOwnershipPrivilege 1304 msdcsc.exe Token: SeLoadDriverPrivilege 1304 msdcsc.exe Token: SeSystemProfilePrivilege 1304 msdcsc.exe Token: SeSystemtimePrivilege 1304 msdcsc.exe Token: SeProfSingleProcessPrivilege 1304 msdcsc.exe Token: SeIncBasePriorityPrivilege 1304 msdcsc.exe Token: SeCreatePagefilePrivilege 1304 msdcsc.exe Token: SeBackupPrivilege 1304 msdcsc.exe Token: SeRestorePrivilege 1304 msdcsc.exe Token: SeShutdownPrivilege 1304 msdcsc.exe Token: SeDebugPrivilege 1304 msdcsc.exe Token: SeSystemEnvironmentPrivilege 1304 msdcsc.exe Token: SeChangeNotifyPrivilege 1304 msdcsc.exe Token: SeRemoteShutdownPrivilege 1304 msdcsc.exe Token: SeUndockPrivilege 1304 msdcsc.exe Token: SeManageVolumePrivilege 1304 msdcsc.exe Token: SeImpersonatePrivilege 1304 msdcsc.exe Token: SeCreateGlobalPrivilege 1304 msdcsc.exe Token: 33 1304 msdcsc.exe Token: 34 1304 msdcsc.exe Token: 35 1304 msdcsc.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
msdcsc.exepid process 1304 msdcsc.exe -
Suspicious use of WriteProcessMemory 43 IoCs
Processes:
19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.execmd.execmd.exemsdcsc.exedescription pid process target process PID 1636 wrote to memory of 1420 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe cmd.exe PID 1636 wrote to memory of 1420 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe cmd.exe PID 1636 wrote to memory of 1420 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe cmd.exe PID 1636 wrote to memory of 1420 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe cmd.exe PID 1636 wrote to memory of 1468 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe cmd.exe PID 1636 wrote to memory of 1468 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe cmd.exe PID 1636 wrote to memory of 1468 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe cmd.exe PID 1636 wrote to memory of 1468 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe cmd.exe PID 1468 wrote to memory of 1152 1468 cmd.exe attrib.exe PID 1468 wrote to memory of 1152 1468 cmd.exe attrib.exe PID 1468 wrote to memory of 1152 1468 cmd.exe attrib.exe PID 1468 wrote to memory of 1152 1468 cmd.exe attrib.exe PID 1636 wrote to memory of 1304 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe msdcsc.exe PID 1636 wrote to memory of 1304 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe msdcsc.exe PID 1636 wrote to memory of 1304 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe msdcsc.exe PID 1636 wrote to memory of 1304 1636 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe msdcsc.exe PID 1420 wrote to memory of 1292 1420 cmd.exe attrib.exe PID 1420 wrote to memory of 1292 1420 cmd.exe attrib.exe PID 1420 wrote to memory of 1292 1420 cmd.exe attrib.exe PID 1420 wrote to memory of 1292 1420 cmd.exe attrib.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe PID 1304 wrote to memory of 1996 1304 msdcsc.exe notepad.exe -
Views/modifies file attributes 1 TTPs 2 IoCs
Processes:
attrib.exeattrib.exepid process 1152 attrib.exe 1292 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe"C:\Users\Admin\AppData\Local\Temp\19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe"1⤵
- 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\19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe" +s +h2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp\19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe" +s +h3⤵
- Sets file to hidden
- 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 +h2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp" +s +h3⤵
- Sets file to hidden
- Views/modifies file attributes
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C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"2⤵
- Modifies firewall policy service
- Disables RegEdit via registry modification
- Executes dropped EXE
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\notepad.exenotepad3⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\Documents\MSDCSC\msdcsc.exeFilesize
253KB
MD5f4a3645aaaa7b14f4dec9a9f2db0040e
SHA18430b2a225c8890a354024eb3273e5a21924aac2
SHA25619e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c
SHA512c14c8aeb6147ad25f5089ff275762f21b066e781c7c2777a055adf11c15549e6dee729e577333d1221b6c61d3731c3824aeb0328650103c6edc77bf9a0cb18f1
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\Users\Admin\Documents\MSDCSC\msdcsc.exeFilesize
253KB
MD5f4a3645aaaa7b14f4dec9a9f2db0040e
SHA18430b2a225c8890a354024eb3273e5a21924aac2
SHA25619e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c
SHA512c14c8aeb6147ad25f5089ff275762f21b066e781c7c2777a055adf11c15549e6dee729e577333d1221b6c61d3731c3824aeb0328650103c6edc77bf9a0cb18f1
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\Users\Admin\Documents\MSDCSC\msdcsc.exeFilesize
253KB
MD5f4a3645aaaa7b14f4dec9a9f2db0040e
SHA18430b2a225c8890a354024eb3273e5a21924aac2
SHA25619e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c
SHA512c14c8aeb6147ad25f5089ff275762f21b066e781c7c2777a055adf11c15549e6dee729e577333d1221b6c61d3731c3824aeb0328650103c6edc77bf9a0cb18f1
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memory/1152-59-0x0000000000000000-mapping.dmp
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memory/1292-62-0x0000000000000000-mapping.dmp
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memory/1304-61-0x0000000000000000-mapping.dmp
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memory/1304-68-0x0000000000400000-0x00000000004BA000-memory.dmpFilesize
744KB
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memory/1304-69-0x0000000000400000-0x00000000004BA000-memory.dmpFilesize
744KB
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memory/1420-56-0x0000000000000000-mapping.dmp
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memory/1468-57-0x0000000000000000-mapping.dmp
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memory/1636-55-0x0000000000400000-0x00000000004BA000-memory.dmpFilesize
744KB
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memory/1636-54-0x00000000763E1000-0x00000000763E3000-memory.dmpFilesize
8KB
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memory/1636-65-0x0000000000400000-0x00000000004BA000-memory.dmpFilesize
744KB
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memory/1996-66-0x0000000000000000-mapping.dmp