skuld | 3cb38b6703b6de0b6d3ccd9c600c217b497d694f7c76566cc38f5a518848306e

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	cd57e4c171d6e8f5ea8b8f824a6a7316.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\SystemBiosVersion	cd57e4c171d6e8f5ea8b8f824a6a7316.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	cd57e4c171d6e8f5ea8b8f824a6a7316.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	cd57e4c172d6e8f5ea8b8f824a6a7316.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	BetterSolara.exe

Executes dropped EXE 4 IoCs

pid	Process
2324	cd57e4c171d6e8f5ea8b8f824a6a7316.exe
4544	cd57e4c172d6e8f5ea8b8f824a6a7316.exe
1176	cd57e4c271d6e8f5ea8b8f824a6a7316.exe
1472	cd57e4c172d6e8f5ea8b8f824a6a7316.exe

Loads dropped DLL 5 IoCs

pid	Process
2324	cd57e4c171d6e8f5ea8b8f824a6a7316.exe
2324	cd57e4c171d6e8f5ea8b8f824a6a7316.exe
2324	cd57e4c171d6e8f5ea8b8f824a6a7316.exe
2324	cd57e4c171d6e8f5ea8b8f824a6a7316.exe
2324	cd57e4c171d6e8f5ea8b8f824a6a7316.exe

Themida packer 9 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/files/0x00070000000238a7-1723.dat	themida
behavioral2/memory/2324-1731-0x0000000180000000-0x0000000180C32000-memory.dmp	themida
behavioral2/memory/2324-1732-0x0000000180000000-0x0000000180C32000-memory.dmp	themida
behavioral2/memory/2324-1733-0x0000000180000000-0x0000000180C32000-memory.dmp	themida
behavioral2/memory/2324-1734-0x0000000180000000-0x0000000180C32000-memory.dmp	themida
behavioral2/memory/2324-1740-0x0000000180000000-0x0000000180C32000-memory.dmp	themida
behavioral2/memory/2324-1743-0x0000000180000000-0x0000000180C32000-memory.dmp	themida
behavioral2/memory/2324-1754-0x0000000180000000-0x0000000180C32000-memory.dmp	themida
behavioral2/memory/2324-1755-0x0000000180000000-0x0000000180C32000-memory.dmp	themida

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-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	cd57e4c271d6e8f5ea8b8f824a6a7316.exe

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	cd57e4c171d6e8f5ea8b8f824a6a7316.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs

Web Service

T1102

flow	ioc
6	raw.githubusercontent.com

Looks up external IP address via web service 13 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
12	api.ipify.org
22	api.ipify.org
2	api.ipify.org
24	api.ipify.org
20	api.ipify.org
16	api.ipify.org
19	api.ipify.org
21	api.ipify.org
27	api.ipify.org
14	api.ipify.org
17	api.ipify.org
25	api.ipify.org
8	api.ipify.org

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2324	cd57e4c171d6e8f5ea8b8f824a6a7316.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
4800	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1176	cd57e4c271d6e8f5ea8b8f824a6a7316.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4956 wrote to memory of 2240	4956	BetterSolara.exe	81
PID 4956 wrote to memory of 2240	4956	BetterSolara.exe	81
PID 2240 wrote to memory of 2324	2240	cmd.exe	84
PID 2240 wrote to memory of 2324	2240	cmd.exe	84
PID 2240 wrote to memory of 4544	2240	cmd.exe	85
PID 2240 wrote to memory of 4544	2240	cmd.exe	85
PID 2240 wrote to memory of 4544	2240	cmd.exe	85
PID 2240 wrote to memory of 1176	2240	cmd.exe	86
PID 2240 wrote to memory of 1176	2240	cmd.exe	86
PID 1176 wrote to memory of 2612	1176	cd57e4c271d6e8f5ea8b8f824a6a7316.exe	87
PID 1176 wrote to memory of 2612	1176	cd57e4c271d6e8f5ea8b8f824a6a7316.exe	87
PID 4544 wrote to memory of 1472	4544	cd57e4c172d6e8f5ea8b8f824a6a7316.exe	89
PID 4544 wrote to memory of 1472	4544	cd57e4c172d6e8f5ea8b8f824a6a7316.exe	89
PID 4544 wrote to memory of 1472	4544	cd57e4c172d6e8f5ea8b8f824a6a7316.exe	89
PID 1472 wrote to memory of 4800	1472	cd57e4c172d6e8f5ea8b8f824a6a7316.exe	90
PID 1472 wrote to memory of 4800	1472	cd57e4c172d6e8f5ea8b8f824a6a7316.exe	90
PID 1472 wrote to memory of 4800	1472	cd57e4c172d6e8f5ea8b8f824a6a7316.exe	90
PID 1176 wrote to memory of 4192	1176	cd57e4c271d6e8f5ea8b8f824a6a7316.exe	92
PID 1176 wrote to memory of 4192	1176	cd57e4c271d6e8f5ea8b8f824a6a7316.exe	92

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2612	attrib.exe
4192	attrib.exe

C:\Users\Admin\AppData\Local\Temp\BetterSolara.exe
"C:\Users\Admin\AppData\Local\Temp\BetterSolara.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4956
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\RarSFX0\run.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2240
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\cd57e4c171d6e8f5ea8b8f824a6a7316.exe
    cd57e4c171d6e8f5ea8b8f824a6a7316.exe
    3⤵
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Loads dropped DLL
    - Checks whether UAC is enabled
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    PID:2324
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\cd57e4c172d6e8f5ea8b8f824a6a7316.exe
    cd57e4c172d6e8f5ea8b8f824a6a7316.exe
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:4544
  - - C:\Users\Admin\AppData\Roaming\XenoManager\cd57e4c172d6e8f5ea8b8f824a6a7316.exe
      "C:\Users\Admin\AppData\Roaming\XenoManager\cd57e4c172d6e8f5ea8b8f824a6a7316.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:1472
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks.exe" /Create /TN "Console" /XML "C:\Users\Admin\AppData\Local\Temp\tmp592C.tmp" /F
        5⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:4800
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\cd57e4c271d6e8f5ea8b8f824a6a7316.exe
    cd57e4c271d6e8f5ea8b8f824a6a7316.exe
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1176
  - - C:\Windows\system32\attrib.exe
      attrib +h +s C:\Users\Admin\AppData\Local\Temp\RarSFX0\cd57e4c271d6e8f5ea8b8f824a6a7316.exe
      4⤵
      Views/modifies file attributes
      PID:2612
  - - C:\Windows\system32\attrib.exe
      attrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
      4⤵
      Views/modifies file attributes
      PID:4192

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

System Information Discovery