asyncrat | 38bb3d953d8845e6eab5acfb0850962361b75f61a70a3f05f71cb5d66bcc638f

Analysis

max time kernel
148s
max time network
152s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260629-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
04/07/2026, 21:48

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General

Target
SkinChanger.exe
Size 209KB
Sample260704-1n5lfset8t
SHA256 38bb3d953d8845e6eab5acfb0850962361b75f61a70a3f05f71cb5d66bcc638f
MD5 b31d35be2f54a8c1304ca25894e4448f
SHA1 a35757b12bbab818988663824ddc642039480a6b
SHA512 c43190fb8504406153978b8e02c2ecda90611d26042d0a32832bc4ac507c05eb7b2157a14c9e3f957bce8ff5c7cd527a1e63a26240a8a1f0947e5477fd170101
SSDEEP 3072:quOKTXO32BVwZkbb+1BYRMrt9kg5jHqtRQAcccokHrXRvx:quOJmskba1BT3kSHoRQz1Z
TLSH
T18124706262078E4AD53223F84461E7FDC6121FD4B93783165BF07C63F9B2A835D2A5E2
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

bhntnz7eur.localto.net:3294

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
Java.exe
install_folder
%Temp%

aes.plain

Signatures

Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x000d00000001c609-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
5316	Java.exe
712	Java.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 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	Java.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Java.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SkinChanger.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2976	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2360	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe
5892	SkinChanger.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5892	SkinChanger.exe
Token: SeDebugPrivilege	5316	Java.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5892 wrote to memory of 5848	5892	SkinChanger.exe	88
PID 5892 wrote to memory of 904	5892	SkinChanger.exe	90
PID 5848 wrote to memory of 2360	5848	cmd.exe	92
PID 904 wrote to memory of 2976	904	cmd.exe	93
PID 904 wrote to memory of 712	904	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\SkinChanger.exe
"C:\Users\Admin\AppData\Local\Temp\SkinChanger.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5892
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Java" /tr '"C:\Users\Admin\AppData\Local\Temp\Java.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5848
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Java" /tr '"C:\Users\Admin\AppData\Local\Temp\Java.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2360
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpFB62.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:904
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2976
- - C:\Users\Admin\AppData\Local\Temp\Java.exe
    "C:\Users\Admin\AppData\Local\Temp\Java.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:712

C:\Users\Admin\AppData\Local\Temp\Java.exe
"C:\Users\Admin\AppData\Local\Temp\Java.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5316

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Java.exe

Path C:\Users\Admin\AppData\Local\Temp\Java.exe
Size 209KB
SHA256 38bb3d953d8845e6eab5acfb0850962361b75f61a70a3f05f71cb5d66bcc638f
MD5 b31d35be2f54a8c1304ca25894e4448f
SHA1 a35757b12bbab818988663824ddc642039480a6b
SHA512 c43190fb8504406153978b8e02c2ecda90611d26042d0a32832bc4ac507c05eb7b2157a14c9e3f957bce8ff5c7cd527a1e63a26240a8a1f0947e5477fd170101
SSDEEP 3072:quOKTXO32BVwZkbb+1BYRMrt9kg5jHqtRQAcccokHrXRvx:quOJmskba1BT3kSHoRQz1Z
TLSH
T18124706262078E4AD53223F84461E7FDC6121FD4B93783165BF07C63F9B2A835D2A5E2
MD5 SHA1 SHA512 SSDEEP TLSH

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tmpFB62.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpFB62.tmp.bat
Size 151B
SHA256 2116edff8bf7b19d3d5696b2f32d09aff226332e7b77e08dc3e7f9e4f47f6c53
MD5 0bcd2d0f5ea596cd919735b28faea17b
SHA1 3f7c871d1f99ea0e4fa2215da722163ee2834283
SHA512 f680d1cf695f934ec28b82a9875d8502e43d9029ddfcf0e569e1b78722f97a70fdf94af37a2de50525b0bc2dd2a44459aea6a3c4607c4cdf7525b584ea59e4dd
TLSH
T195C08C8292C7BA5A380824170ABAE68DA1666C5D3E80AB508304840A52C048DE0D9341
MD5 SHA1 SHA512 TLSH

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memory/5316-12-0x0000000074580000-0x0000000074D3C000-memory.dmp

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memory/5316-14-0x0000000074580000-0x0000000074D3C000-memory.dmp

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memory/5892-0-0x0000000074642000-0x0000000074643000-memory.dmp

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memory/5892-1-0x0000000000270000-0x00000000002AA000-memory.dmp

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memory/5892-2-0x0000000074630000-0x0000000074DEC000-memory.dmp

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memory/5892-3-0x0000000004C90000-0x0000000004D2C000-memory.dmp

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memory/5892-9-0x0000000074630000-0x0000000074DEC000-memory.dmp

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