3961f56f9ca8d8fd6662857c416757dea19d72f4ec6ea14b2262ca66601d9a96

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	DB.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\oprjlwyfk = "C:\\Windows\\SysWOW64\\msimsg9.exe"	DB.EXE

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	msimsg9.exe

Checks BIOS information in registry 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	DB.EXE

Executes dropped EXE 8 IoCs

pid	Process
1664	AV.EXE
2884	AV2.EXE
2544	DB.EXE
2504	EN.EXE
2072	SB.EXE
552	msimsg9.exe
1684	iF17766PaHgP17766.exe
2740	RtlDriver32.exe

Loads dropped DLL 14 IoCs

pid	Process
1656	123.exe
1656	123.exe
1656	123.exe
1656	123.exe
1656	123.exe
1656	123.exe
1656	123.exe
1656	123.exe
1656	123.exe
2544	DB.EXE
2544	DB.EXE
2884	AV2.EXE
2884	AV2.EXE
1664	AV.EXE

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0007000000016d1f-29.dat	upx
behavioral1/files/0x0030000000016cb2-22.dat	upx
behavioral1/memory/2544-45-0x0000000000450000-0x00000000004E3000-memory.dmp	upx
behavioral1/memory/2504-50-0x0000000000400000-0x000000000040A000-memory.dmp	upx
behavioral1/memory/2544-61-0x0000000000450000-0x00000000004E3000-memory.dmp	upx
behavioral1/memory/2544-62-0x0000000000450000-0x00000000004E3000-memory.dmp	upx
behavioral1/memory/2544-65-0x0000000000400000-0x0000000000445000-memory.dmp	upx
behavioral1/memory/2544-69-0x0000000000450000-0x00000000004E3000-memory.dmp	upx
behavioral1/memory/2884-75-0x0000000000400000-0x00000000004C3000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\{56321-2157-3235-3211} = "C:\\Users\\Admin\\AppData\\Roaming\\RtlDriver32.exe"	AV.EXE

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	DB.EXE

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\physicaldrive0	SB.EXE

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\msimsg9.exe	DB.EXE
File opened for modification	C:\Windows\SysWOW64\msimsg9.exe	DB.EXE

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

System Information Discovery
T1082

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

Command and Scripting Interpreter

T1059

pid	Process
776	ipconfig.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\30530A0C86EDB1CD5A2A5FE37EF3BF28E69BE16D	AV.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\30530A0C86EDB1CD5A2A5FE37EF3BF28E69BE16D\Blob = 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	AV.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2544	DB.EXE
2544	DB.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE
2884	AV2.EXE

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2544	DB.EXE
Token: SeDebugPrivilege	2884	AV2.EXE
Token: SeShutdownPrivilege	2072	SB.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1664	AV.EXE

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1664	AV.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
552	msimsg9.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1656 wrote to memory of 1664	1656	123.exe	28
PID 1656 wrote to memory of 1664	1656	123.exe	28
PID 1656 wrote to memory of 1664	1656	123.exe	28
PID 1656 wrote to memory of 1664	1656	123.exe	28
PID 1656 wrote to memory of 2884	1656	123.exe	29
PID 1656 wrote to memory of 2884	1656	123.exe	29
PID 1656 wrote to memory of 2884	1656	123.exe	29
PID 1656 wrote to memory of 2884	1656	123.exe	29
PID 1656 wrote to memory of 2544	1656	123.exe	30
PID 1656 wrote to memory of 2544	1656	123.exe	30
PID 1656 wrote to memory of 2544	1656	123.exe	30
PID 1656 wrote to memory of 2544	1656	123.exe	30
PID 1656 wrote to memory of 2504	1656	123.exe	31
PID 1656 wrote to memory of 2504	1656	123.exe	31
PID 1656 wrote to memory of 2504	1656	123.exe	31
PID 1656 wrote to memory of 2504	1656	123.exe	31
PID 1656 wrote to memory of 2072	1656	123.exe	32
PID 1656 wrote to memory of 2072	1656	123.exe	32
PID 1656 wrote to memory of 2072	1656	123.exe	32
PID 1656 wrote to memory of 2072	1656	123.exe	32
PID 2544 wrote to memory of 552	2544	DB.EXE	35
PID 2544 wrote to memory of 552	2544	DB.EXE	35
PID 2544 wrote to memory of 552	2544	DB.EXE	35
PID 2544 wrote to memory of 552	2544	DB.EXE	35
PID 2884 wrote to memory of 1684	2884	AV2.EXE	37
PID 2884 wrote to memory of 1684	2884	AV2.EXE	37
PID 2884 wrote to memory of 1684	2884	AV2.EXE	37
PID 2884 wrote to memory of 1684	2884	AV2.EXE	37
PID 552 wrote to memory of 776	552	msimsg9.exe	38
PID 552 wrote to memory of 776	552	msimsg9.exe	38
PID 552 wrote to memory of 776	552	msimsg9.exe	38
PID 552 wrote to memory of 776	552	msimsg9.exe	38
PID 1664 wrote to memory of 2740	1664	AV.EXE	40
PID 1664 wrote to memory of 2740	1664	AV.EXE	40
PID 1664 wrote to memory of 2740	1664	AV.EXE	40
PID 1664 wrote to memory of 2740	1664	AV.EXE	40
PID 2544 wrote to memory of 1996	2544	DB.EXE	41
PID 2544 wrote to memory of 1996	2544	DB.EXE	41
PID 2544 wrote to memory of 1996	2544	DB.EXE	41
PID 2544 wrote to memory of 1996	2544	DB.EXE	41

C:\Users\Admin\AppData\Local\Temp\123.exe
"C:\Users\Admin\AppData\Local\Temp\123.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1656
- C:\Users\Admin\AppData\Local\Temp\AV.EXE
  "C:\Users\Admin\AppData\Local\Temp\AV.EXE"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Modifies system certificate store
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:1664
- - C:\Users\Admin\AppData\Roaming\RtlDriver32.exe
    "C:\Users\Admin\AppData\Roaming\RtlDriver32.exe"
    3⤵
    - Executes dropped EXE
    PID:2740
- C:\Users\Admin\AppData\Local\Temp\AV2.EXE
  "C:\Users\Admin\AppData\Local\Temp\AV2.EXE"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2884
- - C:\ProgramData\iF17766PaHgP17766\iF17766PaHgP17766.exe
    "C:\ProgramData\iF17766PaHgP17766\iF17766PaHgP17766.exe" "C:\Users\Admin\AppData\Local\Temp\AV2.EXE"
    3⤵
    - Executes dropped EXE
    PID:1684
- C:\Users\Admin\AppData\Local\Temp\DB.EXE
  "C:\Users\Admin\AppData\Local\Temp\DB.EXE"
  2⤵
  - Adds policy Run key to start application
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks whether UAC is enabled
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2544
- - C:\Windows\SysWOW64\msimsg9.exe
    C:\Windows\SysWOW64\msimsg9.exe
    3⤵
    - Drops file in Drivers directory
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:552
  - - C:\Windows\SysWOW64\ipconfig.exe
      "C:\Windows\system32\ipconfig.exe" /flushdns
      4⤵
      Gathers network information
      PID:776
- - C:\Windows\SysWOW64\cmd.exe
    /c C:\Users\Admin\AppData\Local\Temp\~unins380.bat "C:\Users\Admin\AppData\Local\Temp\DB.EXE"
    3⤵
    PID:1996
- C:\Users\Admin\AppData\Local\Temp\EN.EXE
  "C:\Users\Admin\AppData\Local\Temp\EN.EXE"
  2⤵
  - Executes dropped EXE
  PID:2504
- C:\Users\Admin\AppData\Local\Temp\SB.EXE
  "C:\Users\Admin\AppData\Local\Temp\SB.EXE"
  2⤵
  - Executes dropped EXE
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of AdjustPrivilegeToken
  PID:2072

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

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Defense Evasion

Modify Registry

Pre-OS Boot

T1542

Bootkit

T1542.003

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

Credential Access

Discovery

Query Registry

T1012

System Information Discovery