ac4b45bc07af46efc0b0425b7c49b2b2b93781ebe8928fd5fd1e984b8b4b4a4c

Analysis

max time kernel
118s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-10-2024 14:06

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General

Target

SogouExe/HWSignatureEx.dll
Size

73KB
MD5

140d177622b1678c8fde00d74aac60d5
SHA1

9f0c1710812e61e0b5c84f26294053e5807ffaaf
SHA256

3052dd7fbd449eb5072a4d1d94c7c0147d5f027b734b812a048ff2a2fc29b34c
SHA512

adf21b57b44826b2399ffe71babe1e2973706f4db7ce73d23897b5fab2e6712fe17e1595e56d859618b3421aff6c6d2c62805a7c496874bda340437ee237bc60
SSDEEP

768:pijEFV3OaZPR+7PVxDMwE4w/Gj2jbUlFgSzGjSbieMJ8u1Bi0Wj5EEQHJ2Pyah:pTLOWpU7Q/tjbMyS4SbNOc75ERJts

Score

6^/10

bootkit discovery persistence

Malware Config

Signatures

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	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2672	2636	WerFault.exe	30

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1940 wrote to memory of 2636	1940	rundll32.exe	30
PID 1940 wrote to memory of 2636	1940	rundll32.exe	30
PID 1940 wrote to memory of 2636	1940	rundll32.exe	30
PID 1940 wrote to memory of 2636	1940	rundll32.exe	30
PID 1940 wrote to memory of 2636	1940	rundll32.exe	30
PID 1940 wrote to memory of 2636	1940	rundll32.exe	30
PID 1940 wrote to memory of 2636	1940	rundll32.exe	30
PID 2636 wrote to memory of 2672	2636	rundll32.exe	31
PID 2636 wrote to memory of 2672	2636	rundll32.exe	31
PID 2636 wrote to memory of 2672	2636	rundll32.exe	31
PID 2636 wrote to memory of 2672	2636	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\SogouExe\HWSignatureEx.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1940
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\SogouExe\HWSignatureEx.dll,#1
  2⤵
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2636
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2636 -s 384
    3⤵
    - Program crash
    PID:2672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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