matanbuchus | 77a53dc757fdf381d3906ab256b74ad3cdb7628261c58a62bcc9c6ca605307ba

Analysis

max time kernel
149s
max time network
122s
platform
windows11-21h2_x64
resource
win11-20251015-en
resource tags

arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-x64system
submitted
09/12/2025, 08:04

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General

Target
_77a53dc757fdf381d3906ab256b74ad3cdb7628261c58a62bcc9c6ca605307ba.dll
Size 1.2MB
Sample251209-jynbgser4v
SHA256 77a53dc757fdf381d3906ab256b74ad3cdb7628261c58a62bcc9c6ca605307ba
MD5 1ff365902d427237cf9965779ef65ad0
SHA1 cd53bfe4b85dad062121e337db4ef3e16cb3267a
SHA512 42ce597798efc9d9f5a22293fe471d15d81e1732393173f914d2f5184aa024e9796a8e69fa440c3b53ac9d50d5c8e85485bb8dca1d817c672cad43dd6a989890
SSDEEP 24576:S2Zm93HeH5n7tDGKoORmoSVPbi7VaqKFxPTw/3kPoouW6Ds69DMfV87ZqEArCe:Se43+H5n7tiK3RmhVPb83kPfv6DsZfMo
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

discovery matanbuchus loader

Malware Config

Signatures

Matanbuchus
Matanbuchus is a loader sold as MaaS first seen in February 2021.
loader matanbuchus
Matanbuchus family
matanbuchus

Badlisted process makes network request 3 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
2	3448	rundll32.exe
3	3448	rundll32.exe
4	3448	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 behavior: EnumeratesProcesses 2 IoCs

pid	Process
3448	rundll32.exe
3448	rundll32.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 924 wrote to memory of 3448	924	rundll32.exe	78

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\_77a53dc757fdf381d3906ab256b74ad3cdb7628261c58a62bcc9c6ca605307ba.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:924
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\_77a53dc757fdf381d3906ab256b74ad3cdb7628261c58a62bcc9c6ca605307ba.dll,#1
  2⤵
  - Badlisted process makes network request
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:3448

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

memory/3448-0-0x0000000071D20000-0x00000000757FA000-memory.dmp

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memory/3448-9-0x0000000071D20000-0x00000000757FA000-memory.dmp

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