e24579a71df587a0eb35b584ce823fe05ba9dc07b1239834e0d8fc065513e645

Analysis

max time kernel
152s
max time network
34s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
14-03-2023 13:16

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General

Target

msvcr80.dll
Size

3.6MB
MD5

201aab8f194ab13b82ca039a6a9e4a8e
SHA1

27275cdbf3b4e89430e2faa46ec40fd9790172e0
SHA256

de0c0334bd84c0b0f3d52b0181842263e46e4e7a3e3b5c3939cfc541c11a81e1
SHA512

d9c23e3eca7c4937239ec942d45be7a59938de4fed562c7d6c1d1c18746c96c90b099e7b58da876aaef88f2fd2197890a1fd91b6e57b97652767cbd066b90c22
SSDEEP

98304:p7N760QYYqZMfCG4KRZv9QdqXzKm0s4vB7v:ptmiMfb4KpQdmzIvB

Score

9^/10

evasion trojan

Malware Config

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

rundll32.exe

description ioc process

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

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	rundll32.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

rundll32.exe

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

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

rundll32.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA rundll32.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

rundll32.exe

pid process

1712 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1332 1712 WerFault.exe rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	rundll32.exe

pid	process
1712	rundll32.exe

pid	pid_target	process	target process
1332	1712	WerFault.exe	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 628 wrote to memory of 1712	628	rundll32.exe	rundll32.exe
PID 628 wrote to memory of 1712	628	rundll32.exe	rundll32.exe
PID 628 wrote to memory of 1712	628	rundll32.exe	rundll32.exe
PID 628 wrote to memory of 1712	628	rundll32.exe	rundll32.exe
PID 628 wrote to memory of 1712	628	rundll32.exe	rundll32.exe
PID 628 wrote to memory of 1712	628	rundll32.exe	rundll32.exe
PID 628 wrote to memory of 1712	628	rundll32.exe	rundll32.exe
PID 1712 wrote to memory of 1332	1712	rundll32.exe	WerFault.exe
PID 1712 wrote to memory of 1332	1712	rundll32.exe	WerFault.exe
PID 1712 wrote to memory of 1332	1712	rundll32.exe	WerFault.exe
PID 1712 wrote to memory of 1332	1712	rundll32.exe	WerFault.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\msvcr80.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:628
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\msvcr80.dll,#1
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of WriteProcessMemory
  PID:1712
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1712 -s 296
    3⤵
    - Program crash
    PID:1332

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/1712-54-0x0000000002260000-0x0000000002D33000-memory.dmp

Filesize
10.8MB

Download
memory/1712-55-0x0000000002260000-0x0000000002D33000-memory.dmp

Filesize
10.8MB

Download
memory/1712-56-0x0000000002260000-0x0000000002D33000-memory.dmp

Filesize
10.8MB

Download
memory/1712-57-0x0000000002260000-0x0000000002D33000-memory.dmp

Filesize
10.8MB

Download
memory/1712-58-0x0000000002260000-0x0000000002D33000-memory.dmp

Filesize
10.8MB

Download