0bb06663236c1266071b5c95bd75e2bc3aff88694049bfabb4f05322ff106f32

Analysis

max time kernel
122s
max time network
124s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
02/08/2024, 03:09

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General

Target

bin/Steam.dll
Size

414KB
MD5

270580201888767c8322451989bf2be8
SHA1

552e97202fab15632d5925ece3c9f5bc972dca68
SHA256

9cb46562c55a7f7028741c281cd95e7f7e52c50e9c95c8082ce4ef0a36a5894e
SHA512

1a55e4f4ed25e0a6e05a27ce2565e43defcf6226091e9b41cc7d871079eaae38e628778473e1c5a1b7d58e7cdc22290488488bbc8aeb9aaae948c9a7d1e769af
SSDEEP

12288:JTVgAkITiRU4UaWP+n7UMkc89d4tIdQj4My9bkNkP1BPOv+TNxJygjkvi:JjN4UaWP+7Lkc89dFdQj4rpkNUJFTLZ

Score

7^/10

bootkit discovery persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
2384	rundll32.exe

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

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 7 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 2384	1712	rundll32.exe	30
PID 1712 wrote to memory of 2384	1712	rundll32.exe	30
PID 1712 wrote to memory of 2384	1712	rundll32.exe	30
PID 1712 wrote to memory of 2384	1712	rundll32.exe	30
PID 1712 wrote to memory of 2384	1712	rundll32.exe	30
PID 1712 wrote to memory of 2384	1712	rundll32.exe	30
PID 1712 wrote to memory of 2384	1712	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bin\Steam.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1712
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bin\Steam.dll,#1
  2⤵
  - Loads dropped DLL
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  PID:2384

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

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Downloads

\Users\Admin\AppData\Local\Temp\bin\Y4cKwQbK.dat

Filesize
61KB

MD5
00d9cecbbd06138debbc8f98da01e1a1

SHA1
926e4745e95dad351d28dcc789b21fa9682c2ced

SHA256
bbbbe4e428de60fe59cc3501b8bf600bbbc132711fa7fe69457fb7bc5e7139fb

SHA512
a6d668e70b0574bc451d01859d2b3f5c5e2c9e02c97ac753170538d5fddc3e1a76c9daade694832c151d1e100452e0af4c0e34021c4ac708d394f8150e40bffd

Download Submit
memory/2384-6-0x0000000074BE0000-0x0000000074C0B000-memory.dmp

Filesize
172KB

Download
memory/2384-5-0x0000000074C09000-0x0000000074C0A000-memory.dmp

Filesize
4KB

Download
memory/2384-4-0x0000000074BE0000-0x0000000074C0B000-memory.dmp

Filesize
172KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads