5ec65b73c505fa221d5f9191ed767a1a027c60f8544392360c8d153955f594fc

Analysis

max time kernel
37s
max time network
125s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
24/09/2022, 14:29

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General

Target

document-130722.10498.lnk
Size

1KB
MD5

4fc5487f3a00ebde42c1f00e338fb9b0
SHA1

c129fef267cf6e76c565b9206a078fc1f2f78889
SHA256

32de9a1f6a2a109cb6dedc1cfa9b14e0ce443c53e1232b8c459fe0ad25f473b7
SHA512

1d77f640b27b0a537ab9121601e00956347b2641febe04261d1ef40688004344fa0d8e144d9167c273136162b346c9e565e394fc6fa008e11e529caefaf1e00b

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\VBoxMouse	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxService	rundll32.exe
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

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\FADT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\RSDT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\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
1844	rundll32.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 42 IoCs

pid	Process
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe
1844	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1344 wrote to memory of 892	1344	cmd.exe	27
PID 1344 wrote to memory of 892	1344	cmd.exe	27
PID 1344 wrote to memory of 892	1344	cmd.exe	27
PID 892 wrote to memory of 1844	892	cmd.exe	29
PID 892 wrote to memory of 1844	892	cmd.exe	29
PID 892 wrote to memory of 1844	892	cmd.exe	29

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\document-130722.10498.lnk
1⤵
- Suspicious use of WriteProcessMemory
PID:1344
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c "start RvimAikr.png && start ru^n^d^l^l3^2 wfNRQyZ3.d^l^l, maincase"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:892
- - C:\Windows\system32\rundll32.exe
    rundll32 wfNRQyZ3.dll, maincase
    3⤵
    - 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:1844

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/892-143-0x0000000002150000-0x0000000002160000-memory.dmp

Filesize
64KB

Download
memory/1344-54-0x000007FEFBAE1000-0x000007FEFBAE3000-memory.dmp

Filesize
8KB

Download
memory/1844-145-0x0000000001E70000-0x0000000001FC3000-memory.dmp

Filesize
1.3MB

Download