Analysis
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max time kernel
149s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
16-12-2024 04:56
Behavioral task
behavioral1
Sample
fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe
Resource
win7-20241010-en
windows7-x64
21 signatures
150 seconds
General
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Target
fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe
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Size
1.6MB
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MD5
d05d8198490af311c08159b1d19801e3
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SHA1
d8e458d94e97e0f4270ed76798cb53741094762c
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SHA256
fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7
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SHA512
d74f98ef1a24a8589e8c525b2848e8d4f78f412227fb3979c48d79d3b4a8428e9a30c4de0b01db301cec21f71f0ea36d8b599191236759128aec3ed382fe2490
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SSDEEP
49152:biRnatOaP7Y9k0wK7/l20+FxyqfuXBO15oAlwmSiNL:biotxPWk0wKzllEyIcBO1yAlJS
Malware Config
Extracted
Family
darkcomet
Botnet
Sazan
C2
95.173.236.101:1604
Mutex
DC_MUTEX-QVKEB01
Attributes
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InstallPath
MSDCSC\msdcsc.exe
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gencode
L14htyU8W4iS
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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
MicroUpdate
Signatures
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Darkcomet family
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\MSDCSC\\msdcsc.exe" fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe -
Modifies firewall policy service 3 TTPs 3 IoCs
description ioc Process 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 Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile msdcsc.exe -
Modifies security service 2 TTPs 1 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4" msdcsc.exe -
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" msdcsc.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" msdcsc.exe -
Disables RegEdit via registry modification 1 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" msdcsc.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe -
Executes dropped EXE 2 IoCs
pid Process 1588 EXTREME INJECTOR V3.EXE 232 msdcsc.exe -
description 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
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe" fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Set value (str) \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe" msdcsc.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
flow ioc 13 raw.githubusercontent.com 14 raw.githubusercontent.com -
Drops file in System32 directory 3 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\MSDCSC\msdcsc.exe fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe File opened for modification C:\Windows\SysWOW64\MSDCSC\ fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe File created C:\Windows\SysWOW64\MSDCSC\msdcsc.exe fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe -
resource yara_rule behavioral2/memory/1080-0-0x0000000000400000-0x00000000006A0000-memory.dmp upx behavioral2/files/0x0007000000023c94-20.dat upx behavioral2/memory/232-28-0x0000000000400000-0x00000000006A0000-memory.dmp upx behavioral2/memory/1080-31-0x0000000000400000-0x00000000006A0000-memory.dmp upx behavioral2/memory/232-37-0x0000000000400000-0x00000000006A0000-memory.dmp upx behavioral2/memory/232-39-0x0000000000400000-0x00000000006A0000-memory.dmp upx behavioral2/memory/232-41-0x0000000000400000-0x00000000006A0000-memory.dmp upx behavioral2/memory/232-45-0x0000000000400000-0x00000000006A0000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language msdcsc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language notepad.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 232 msdcsc.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeSecurityPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeTakeOwnershipPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeLoadDriverPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeSystemProfilePrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeSystemtimePrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeProfSingleProcessPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeIncBasePriorityPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeCreatePagefilePrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeBackupPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeRestorePrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeShutdownPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeDebugPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeSystemEnvironmentPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeChangeNotifyPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeRemoteShutdownPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeUndockPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeManageVolumePrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeImpersonatePrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeCreateGlobalPrivilege 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: 33 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: 34 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: 35 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: 36 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe Token: SeDebugPrivilege 1588 EXTREME INJECTOR V3.EXE Token: 33 1588 EXTREME INJECTOR V3.EXE Token: SeIncBasePriorityPrivilege 1588 EXTREME INJECTOR V3.EXE Token: SeIncreaseQuotaPrivilege 232 msdcsc.exe Token: SeSecurityPrivilege 232 msdcsc.exe Token: SeTakeOwnershipPrivilege 232 msdcsc.exe Token: SeLoadDriverPrivilege 232 msdcsc.exe Token: SeSystemProfilePrivilege 232 msdcsc.exe Token: SeSystemtimePrivilege 232 msdcsc.exe Token: SeProfSingleProcessPrivilege 232 msdcsc.exe Token: SeIncBasePriorityPrivilege 232 msdcsc.exe Token: SeCreatePagefilePrivilege 232 msdcsc.exe Token: SeBackupPrivilege 232 msdcsc.exe Token: SeRestorePrivilege 232 msdcsc.exe Token: SeShutdownPrivilege 232 msdcsc.exe Token: SeDebugPrivilege 232 msdcsc.exe Token: SeSystemEnvironmentPrivilege 232 msdcsc.exe Token: SeChangeNotifyPrivilege 232 msdcsc.exe Token: SeRemoteShutdownPrivilege 232 msdcsc.exe Token: SeUndockPrivilege 232 msdcsc.exe Token: SeManageVolumePrivilege 232 msdcsc.exe Token: SeImpersonatePrivilege 232 msdcsc.exe Token: SeCreateGlobalPrivilege 232 msdcsc.exe Token: 33 232 msdcsc.exe Token: 34 232 msdcsc.exe Token: 35 232 msdcsc.exe Token: 36 232 msdcsc.exe Token: SeDebugPrivilege 1588 EXTREME INJECTOR V3.EXE Token: 33 1588 EXTREME INJECTOR V3.EXE Token: SeIncBasePriorityPrivilege 1588 EXTREME INJECTOR V3.EXE Token: 33 1588 EXTREME INJECTOR V3.EXE Token: SeIncBasePriorityPrivilege 1588 EXTREME INJECTOR V3.EXE Token: 33 1588 EXTREME INJECTOR V3.EXE Token: SeIncBasePriorityPrivilege 1588 EXTREME INJECTOR V3.EXE Token: 33 1588 EXTREME INJECTOR V3.EXE Token: SeIncBasePriorityPrivilege 1588 EXTREME INJECTOR V3.EXE Token: 33 1588 EXTREME INJECTOR V3.EXE Token: SeIncBasePriorityPrivilege 1588 EXTREME INJECTOR V3.EXE Token: 33 1588 EXTREME INJECTOR V3.EXE Token: SeIncBasePriorityPrivilege 1588 EXTREME INJECTOR V3.EXE -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 232 msdcsc.exe -
Suspicious use of WriteProcessMemory 32 IoCs
description pid Process procid_target PID 1080 wrote to memory of 1588 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe 83 PID 1080 wrote to memory of 1588 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe 83 PID 1080 wrote to memory of 232 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe 84 PID 1080 wrote to memory of 232 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe 84 PID 1080 wrote to memory of 232 1080 fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe 84 PID 232 wrote to memory of 4520 232 msdcsc.exe 85 PID 232 wrote to memory of 4520 232 msdcsc.exe 85 PID 232 wrote to memory of 4520 232 msdcsc.exe 85 PID 232 wrote to memory of 3788 232 msdcsc.exe 86 PID 232 wrote to memory of 3788 232 msdcsc.exe 86 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 PID 232 wrote to memory of 64 232 msdcsc.exe 87 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion msdcsc.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern msdcsc.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern\NoControlPanel = "1" msdcsc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe"C:\Users\Admin\AppData\Local\Temp\fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1080 -
C:\Users\Admin\AppData\Local\Temp\EXTREME INJECTOR V3.EXE"C:\Users\Admin\AppData\Local\Temp\EXTREME INJECTOR V3.EXE"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1588
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C:\Windows\SysWOW64\MSDCSC\msdcsc.exe"C:\Windows\system32\MSDCSC\msdcsc.exe"2⤵
- Modifies firewall policy service
- Modifies security service
- Windows security bypass
- Disables RegEdit via registry modification
- Executes dropped EXE
- Windows security modification
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:232 -
C:\Program Files (x86)\Internet Explorer\iexplore.exe"C:\Program Files (x86)\Internet Explorer\iexplore.exe"3⤵PID:4520
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C:\Windows\explorer.exe"C:\Windows\explorer.exe"3⤵PID:3788
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C:\Windows\SysWOW64\notepad.exenotepad3⤵
- System Location Discovery: System Language Discovery
PID:64
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Defense Evasion
Impair Defenses
3Disable or Modify System Firewall
1Disable or Modify Tools
2Modify Registry
7Replay Monitor
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Downloads
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Filesize
1.9MB
MD5ec801a7d4b72a288ec6c207bb9ff0131
SHA132eec2ae1f9e201516fa7fcdc16c4928f7997561
SHA256b65f40618f584303ca0bcf9b5f88c233cc4237699c0c4bf40ba8facbe8195a46
SHA512a07dd5e8241de73ce65ff8d74acef4942b85fc45cf6a7baafd3c0f9d330b08e7412f2023ba667e99b40e732a65e8fb4389f7fe73c7b6256ca71e63afe46cdcac
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Filesize
1.6MB
MD5d05d8198490af311c08159b1d19801e3
SHA1d8e458d94e97e0f4270ed76798cb53741094762c
SHA256fc42dba54aad4d62a0e50112ef6cda210285f7fb1f388dc1a6ac6fab99335ba7
SHA512d74f98ef1a24a8589e8c525b2848e8d4f78f412227fb3979c48d79d3b4a8428e9a30c4de0b01db301cec21f71f0ea36d8b599191236759128aec3ed382fe2490