8c3089133607bfd2a73d5f06ea60b7aca0989bedfd7a503e0beda16249a9e83d

Resubmissions

03/10/2022, 18:11 UTC

221003-wstmjaacgm 10

26/09/2022, 21:49 UTC

220926-1pkmnsdbdq 9

Analysis

max time kernel
40s
max time network
43s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
26/09/2022, 21:49 UTC

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General

Target

PnrirLoslBOSWR.bat
Size

1KB
MD5

6fe0cff624e47547185b869db1d72f45
SHA1

ed28b0e2acc7e357152001fbeffdbea6ceab0230
SHA256

4685e7be2b60d0edc5480a4befbac6130dc65c7bd149f6010b86d24a601bcb3f
SHA512

1613a4eec4e9f62379458e0c1d3fcd5de453174f445a8ebd673ca1cb22f26f32d2b58bd0da094deed14af8d1ed7a3f7bf3e026702c751883c81e79c7890aa654

Score

9^/10

evasion

Malware Config

Signatures

Enumerates VirtualBox registry keys 2 TTPs 5 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxSF	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxVideo	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxGuest	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxMouse	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxService	rundll32.exe

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 3 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\FADT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\RSDT\VBOX__	rundll32.exe

Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	rundll32.exe

Checks BIOS information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	rundll32.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\SOFTWARE\Wine	rundll32.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1340	rundll32.exe

Suspicious behavior: EnumeratesProcesses 42 IoCs

pid	Process
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe
1340	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1424 wrote to memory of 1340	1424	cmd.exe	27
PID 1424 wrote to memory of 1340	1424	cmd.exe	27
PID 1424 wrote to memory of 1340	1424	cmd.exe	27

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\PnrirLoslBOSWR.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1424
- C:\Windows\system32\rundll32.exe
  rundll32 lqDwAhoXOlNwLd.dll,TlvRun
  2⤵
  - Enumerates VirtualBox registry keys
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Looks for VirtualBox Guest Additions in registry
  - Checks BIOS information in registry
  - Identifies Wine through registry keys
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  PID:1340

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1340-55-0x0000000001F00000-0x0000000002053000-memory.dmp

Filesize
1.3MB

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Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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