darkcomet | 3590ab586aa6063313dfe5cc9c55fec102db3bec670cde515c2534b2cc59258f

System Information Discovery

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

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\Chrome = "C:\\ProgramData\\Services.exe"	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2376 set thread context of 2880	2376	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	30

UPX packed file 27 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2880-9-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-11-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-8-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-5-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-4-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-14-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-16-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-17-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-21-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-20-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-19-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-15-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-22-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-23-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-24-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-25-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-26-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-27-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-28-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-29-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-30-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-31-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-32-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-33-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-34-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-35-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2880-36-0x0000000000400000-0x00000000004B5000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 2 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	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe

Checks processor information in registry 2 TTPs 4 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	vbc.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	vbc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	vbc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	vbc.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

System Information Discovery

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

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2880	vbc.exe
Token: SeSecurityPrivilege	2880	vbc.exe
Token: SeTakeOwnershipPrivilege	2880	vbc.exe
Token: SeLoadDriverPrivilege	2880	vbc.exe
Token: SeSystemProfilePrivilege	2880	vbc.exe
Token: SeSystemtimePrivilege	2880	vbc.exe
Token: SeProfSingleProcessPrivilege	2880	vbc.exe
Token: SeIncBasePriorityPrivilege	2880	vbc.exe
Token: SeCreatePagefilePrivilege	2880	vbc.exe
Token: SeBackupPrivilege	2880	vbc.exe
Token: SeRestorePrivilege	2880	vbc.exe
Token: SeShutdownPrivilege	2880	vbc.exe
Token: SeDebugPrivilege	2880	vbc.exe
Token: SeSystemEnvironmentPrivilege	2880	vbc.exe
Token: SeChangeNotifyPrivilege	2880	vbc.exe
Token: SeRemoteShutdownPrivilege	2880	vbc.exe
Token: SeUndockPrivilege	2880	vbc.exe
Token: SeManageVolumePrivilege	2880	vbc.exe
Token: SeImpersonatePrivilege	2880	vbc.exe
Token: SeCreateGlobalPrivilege	2880	vbc.exe
Token: 33	2880	vbc.exe
Token: 34	2880	vbc.exe
Token: 35	2880	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2880	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 2880	2376	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	30
PID 2376 wrote to memory of 2880	2376	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	30
PID 2376 wrote to memory of 2880	2376	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	30
PID 2376 wrote to memory of 2880	2376	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	30
PID 2376 wrote to memory of 2880	2376	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	30
PID 2376 wrote to memory of 2880	2376	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	30
PID 2376 wrote to memory of 2880	2376	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	30
PID 2376 wrote to memory of 2880	2376	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2376
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Checks BIOS information in registry
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2880

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

3

System Information Discovery

3

System Location Discovery

T1614

System Language Discovery