acrstealer | 35961cc69ddb4034a524b5593c17c7a0a91748077970a23defe76f7a33c2aa27

Analysis

max time kernel
148s
max time network
143s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
20/08/2026, 06:27

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General

Target
35961cc69ddb4034a524b5593c17c7a0a91748077970a23defe76f7a33c2aa27.bin.dll
Size 5.9MB
Sample260820-g7thra1drf
SHA256 35961cc69ddb4034a524b5593c17c7a0a91748077970a23defe76f7a33c2aa27
MD5 6e74786e9823cf7d9f5ba1a6c36d5c46
SHA1 bb4a7bc057ecafa32f0a55c4e674ef1be633b3be
SHA512 020ffe1e66e38d73cf9bc2495dfd6ea9ace757db6f4cad3a1f2553ace0f69b636b9319535657b6f10bf7184d8dc88fc7ab25933c7e072735df60e71c810ca750
SSDEEP 49152:Jzn1wFYShFJl8iBfk/PHf+rfcW2TMUuXhKtyHYwQBScobCgzg9s/LL50kVq1UZNm:MK4lIkiQZfArtm0NInk9aEtxl
TLSH
T17C564D222051672EC6A5017E295E775CD3DED912C8BCB06ECD6271D6C4A38632BBF12F
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery acrstealer stealer

Malware Config

Extracted

Family

acrstealer

Version

4.3.3-alpha1

media.barmaidlushness.cc

Decoy

stackpathcdn.com

Attributes

ddrs
https://telegra.ph/String-Methods-08-01
guids
f1575b64-8492-4e8b-b102-4d26e8c70371

019fd857-3f03-755f-9497-110061ed4da0
user_agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.2.6187.130 Safari/537.36

xor.hex

Signatures

Family: ACR stealer,GrMsk
ACR stealer (aka GrMsk stealer) is an infostealer written in C++.
stealer acrstealer

Detects ACRStealer V4.x 1 IoCs

resource	yara_rule
behavioral2/files/0x0004000000000432-6.dat	family_acrstealer_v3

Loads dropped DLL 1 IoCs

pid	Process
4888	explorer.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4888	explorer.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1156 set thread context of 4888	1156	rundll32.exe	90

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 3 IoCs

pid	Process
4888	explorer.exe
4888	explorer.exe
4888	explorer.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1080 wrote to memory of 1156	1080	rundll32.exe	88
PID 1156 wrote to memory of 4888	1156	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\35961cc69ddb4034a524b5593c17c7a0a91748077970a23defe76f7a33c2aa27.bin.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1080
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\35961cc69ddb4034a524b5593c17c7a0a91748077970a23defe76f7a33c2aa27.bin.dll,#1
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1156
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    - Loads dropped DLL
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious behavior: EnumeratesProcesses
    PID:4888

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

Replay Monitor

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Downloads

~DF7BF3A0668E97774F.tmp

Path C:\Windows\Temp\~DF7BF3A0668E97774F.tmp
Size 597KB
SHA256 047d4a22451027e6b351b49c0357caa8604ade070332eeeb589c937c6aaa5b24
MD5 841a1056f8846de20673a6b69b22f40d
SHA1 1f6846d9c3872536bbe1b0a370b73215d5795a37
SHA512 b7278b98e975bf9d79aca5bfeba505260b724af79f37dcea5bced0b9643be34223326cdfc32824925cc71870a94fb9ec92c7c351433f674b674f5fa984ad10f7
SSDEEP 12288:R+q3wf3hd61NGDPAgVE6/Kg45t9Sfqyughh5YHtpgm/kkPReCwx0:R+qgPhdON6b7/Kg45t9SfqyuUY7gm/5t
TLSH
T196D49D56DAC280F1EC4399B2332FF73F6B726E068835C9EADBE419559C73761660B081
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1156-2-0x0000000043DA0000-0x0000000043E76000-memory.dmp

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memory/4888-9-0x0000000000F30000-0x0000000000F37000-memory.dmp

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