darkcomet | e709fbb8d14c11e567d5b6e82f9378a8eb9358fb5499f277acec2ac713932891

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Program Files\\Sys32\\windupdt\\svchîst.exe"	server.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	svchîst.exe

Executes dropped EXE 2 IoCs

pid	Process
1964	server.exe
2952	svchîst.exe

Loads dropped DLL 4 IoCs

pid	Process
3068	d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe
3068	d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe
1964	server.exe
1964	server.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchîst = "C:\\Program Files\\Sys32\\windupdt\\svchîst.exe"	server.exe

UPX packed file 19 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x000b000000012270-8.dat	upx
behavioral1/memory/1964-16-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-31-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/1964-33-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-390-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-463-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-464-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-465-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-466-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-467-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-469-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-902-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-903-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-904-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-905-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-906-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-907-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-908-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral1/memory/2952-909-0x0000000000400000-0x00000000004C5000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files\Sys32\windupdt\svchîst.exe	server.exe
File opened for modification	C:\Program Files\Sys32\windupdt\svchîst.exe	server.exe
File opened for modification	C:\Program Files\Sys32\windupdt\	server.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	IEXPLORE.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchîst.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	server.exe

Checks processor information in registry 2 TTPs 8 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	server.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	svchîst.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svchîst.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	svchîst.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	svchîst.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	server.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	svchîst.exe

Modifies Internet Explorer settings 1 TTPs 36 IoCs

adware spyware

Modify Registry

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "1"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\SearchScopes\DownloadRetries = "2"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{F41A5981-B458-11EF-869D-46BBF83CD43C} = "0"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\MFV = 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	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\SearchScopes	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "439709829"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb010000008c32f037a7fd274bbd7928cd726674da00000000020000000000106600000001000020000000873c2d372a358600e96c0ba90b3d4ae63f7ed265c0f216e62bc90bdc5b4f9e25000000000e8000000002000020000000c2e210a67a0233c763906ad504a06ecbb82f331ba955ec1a6668153a9275863e2000000053f1402e681b644ae0c745032a1a5db8c90032c410d5806c8d54e050b18bf4d140000000dbe24d8891ed6eab5116582a637e8d8b8dfcade863889cebec83197b53e7039b7709b42ac18fe49ae1da16b86b2748b773b12a776eaca0dc9dbb350c467e68c8	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 40ffb7c86548db01	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2952	svchîst.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1964	server.exe
Token: SeSecurityPrivilege	1964	server.exe
Token: SeTakeOwnershipPrivilege	1964	server.exe
Token: SeLoadDriverPrivilege	1964	server.exe
Token: SeSystemProfilePrivilege	1964	server.exe
Token: SeSystemtimePrivilege	1964	server.exe
Token: SeProfSingleProcessPrivilege	1964	server.exe
Token: SeIncBasePriorityPrivilege	1964	server.exe
Token: SeCreatePagefilePrivilege	1964	server.exe
Token: SeBackupPrivilege	1964	server.exe
Token: SeRestorePrivilege	1964	server.exe
Token: SeShutdownPrivilege	1964	server.exe
Token: SeDebugPrivilege	1964	server.exe
Token: SeSystemEnvironmentPrivilege	1964	server.exe
Token: SeChangeNotifyPrivilege	1964	server.exe
Token: SeRemoteShutdownPrivilege	1964	server.exe
Token: SeUndockPrivilege	1964	server.exe
Token: SeManageVolumePrivilege	1964	server.exe
Token: SeImpersonatePrivilege	1964	server.exe
Token: SeCreateGlobalPrivilege	1964	server.exe
Token: 33	1964	server.exe
Token: 34	1964	server.exe
Token: 35	1964	server.exe
Token: SeIncreaseQuotaPrivilege	2952	svchîst.exe
Token: SeSecurityPrivilege	2952	svchîst.exe
Token: SeTakeOwnershipPrivilege	2952	svchîst.exe
Token: SeLoadDriverPrivilege	2952	svchîst.exe
Token: SeSystemProfilePrivilege	2952	svchîst.exe
Token: SeSystemtimePrivilege	2952	svchîst.exe
Token: SeProfSingleProcessPrivilege	2952	svchîst.exe
Token: SeIncBasePriorityPrivilege	2952	svchîst.exe
Token: SeCreatePagefilePrivilege	2952	svchîst.exe
Token: SeBackupPrivilege	2952	svchîst.exe
Token: SeRestorePrivilege	2952	svchîst.exe
Token: SeShutdownPrivilege	2952	svchîst.exe
Token: SeDebugPrivilege	2952	svchîst.exe
Token: SeSystemEnvironmentPrivilege	2952	svchîst.exe
Token: SeChangeNotifyPrivilege	2952	svchîst.exe
Token: SeRemoteShutdownPrivilege	2952	svchîst.exe
Token: SeUndockPrivilege	2952	svchîst.exe
Token: SeManageVolumePrivilege	2952	svchîst.exe
Token: SeImpersonatePrivilege	2952	svchîst.exe
Token: SeCreateGlobalPrivilege	2952	svchîst.exe
Token: 33	2952	svchîst.exe
Token: 34	2952	svchîst.exe
Token: 35	2952	svchîst.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1528	iexplore.exe

Suspicious use of SetWindowsHookEx 7 IoCs

pid	Process
1528	iexplore.exe
1528	iexplore.exe
2844	IEXPLORE.EXE
2844	IEXPLORE.EXE
2952	svchîst.exe
2844	IEXPLORE.EXE
2844	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 1964	3068	d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe	30
PID 3068 wrote to memory of 1964	3068	d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe	30
PID 3068 wrote to memory of 1964	3068	d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe	30
PID 3068 wrote to memory of 1964	3068	d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe	30
PID 3068 wrote to memory of 1528	3068	d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe	31
PID 3068 wrote to memory of 1528	3068	d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe	31
PID 3068 wrote to memory of 1528	3068	d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe	31
PID 3068 wrote to memory of 1528	3068	d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe	31
PID 1528 wrote to memory of 2844	1528	iexplore.exe	33
PID 1528 wrote to memory of 2844	1528	iexplore.exe	33
PID 1528 wrote to memory of 2844	1528	iexplore.exe	33
PID 1528 wrote to memory of 2844	1528	iexplore.exe	33
PID 1964 wrote to memory of 2724	1964	server.exe	32
PID 1964 wrote to memory of 2724	1964	server.exe	32
PID 1964 wrote to memory of 2724	1964	server.exe	32
PID 1964 wrote to memory of 2724	1964	server.exe	32
PID 1964 wrote to memory of 2952	1964	server.exe	34
PID 1964 wrote to memory of 2952	1964	server.exe	34
PID 1964 wrote to memory of 2952	1964	server.exe	34
PID 1964 wrote to memory of 2952	1964	server.exe	34

C:\Users\Admin\AppData\Local\Temp\d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d0c9cde6f5ad0af2666aebad26e363b9_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Users\Admin\AppData\Local\Temp\server.exe
  "C:\Users\Admin\AppData\Local\Temp\server.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1964
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    PID:2724
- - C:\Program Files\Sys32\windupdt\svchîst.exe
    "C:\Program Files\Sys32\windupdt\svchîst.exe"
    3⤵
    - Checks BIOS information in registry
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2952
- C:\Program Files\Internet Explorer\iexplore.exe
  "C:\Program Files\Internet Explorer\iexplore.exe" C:\Users\Admin\AppData\Local\Temp\3a59a0f61dbd.gif
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1528
- - C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
    "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1528 CREDAT:275457 /prefetch:2
    3⤵
    - System Location Discovery: System Language Discovery
    - Modifies Internet Explorer settings
    - Suspicious use of SetWindowsHookEx
    PID:2844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery