asyncrat | 3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d

Analysis

max time kernel
148s
max time network
149s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
01/08/2026, 13:21

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General

Target
3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
Size 45KB
Sample260801-ql62dswfrf
SHA256 3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d
MD5 c58d1de41a5ceeeb6db82955f2acf58f
SHA1 0e1e84feebbbc3aadadbe48ede0d212ff8284cc3
SHA512 2dc434beeb69b73ab0824293f4099dde13b7b77338b0417c829a841c80176b01f503dcd6d58a4131b6a8a0fc4d5176ec900c67484e98e48456e9268d3475e257
SSDEEP 768:QulLJTEs+EgWUKJTGmo2q9qCSwTMSPI5ljbQgX3iO+ortjSVtBDZTx:QulLJTE9X29gG5tbXXS1oxjSVjdTx
TLSH
T1A0232C103BD8813BF2BE4F74A9F261458A7AF6673603D58A1CC4419B5613FC68A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

sextin.org:80
sextin.org:22
sextin.org:8080
sextin.org:8880
sextin.org:2052
sextin.org:2082
sextin.org:2086
sextin.org:2095
sextin.org:443
sextin.org:2053
sextin.org:2083
sextin.org:2087
sextin.org:2096
sextin.org:8443
www.sextin.org:80
www.sextin.org:22
www.sextin.org:8080
www.sextin.org:8880
www.sextin.org:2052
www.sextin.org:2082
www.sextin.org:2086
www.sextin.org:2095
www.sextin.org:443
www.sextin.org:2053
www.sextin.org:2083
www.sextin.org:2087
www.sextin.org:2096
www.sextin.org:8443
trisis.sextin.org:80
trisis.sextin.org:22
trisis.sextin.org:8080
trisis.sextin.org:8880
trisis.sextin.org:2052
trisis.sextin.org:2082
trisis.sextin.org:2086
trisis.sextin.org:2095
trisis.sextin.org:443
trisis.sextin.org:2053
trisis.sextin.org:2083
trisis.sextin.org:2087
trisis.sextin.org:2096
trisis.sextin.org:8443
lokibot.sextin.org:80
lokibot.sextin.org:22
lokibot.sextin.org:8080
lokibot.sextin.org:8880
lokibot.sextin.org:2052
lokibot.sextin.org:2082
lokibot.sextin.org:2086
lokibot.sextin.org:2095
lokibot.sextin.org:443
lokibot.sextin.org:2053
lokibot.sextin.org:2083
lokibot.sextin.org:2087
lokibot.sextin.org:2096
lokibot.sextin.org:8443

Mutex

cxbbttFyfc8X

Attributes

delay
0
install
true
install_file
mepfc9.exe
install_folder
%AppData%

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/0x000d00000001c5b9-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
5380	mepfc9.exe
4268	mepfc9.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
5260	cmd.exe
4316	cmd.exe

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mepfc9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mepfc9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3700	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
2888	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4972 wrote to memory of 5260	4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe	89
PID 4972 wrote to memory of 4316	4972	3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe	91
PID 4316 wrote to memory of 3700	4316	cmd.exe	93
PID 5260 wrote to memory of 2888	5260	cmd.exe	94
PID 4316 wrote to memory of 4268	4316	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe
"C:\Users\Admin\AppData\Local\Temp\3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4972
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "mepfc9" /tr '"C:\Users\Admin\AppData\Roaming\mepfc9.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5260
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "mepfc9" /tr '"C:\Users\Admin\AppData\Roaming\mepfc9.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2888
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9810.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4316
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3700
- - C:\Users\Admin\AppData\Roaming\mepfc9.exe
    "C:\Users\Admin\AppData\Roaming\mepfc9.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4268

C:\Users\Admin\AppData\Roaming\mepfc9.exe
"C:\Users\Admin\AppData\Roaming\mepfc9.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:5380

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

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

tmp9810.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp9810.tmp.bat
Size 150B
SHA256 604d6e6c7e20cf0e9fdaaf4804a4ff6c1d890e422af5ee29d6b5bdfcfdeddfe3
MD5 d9015775fdacad301fcca4a3f7cf55f5
SHA1 b5a3abc34add294c7af959514242fb8d7f82cb58
SHA512 8e4e5316baee19647ce21ea984359f013c1a5a5588873b02c42e4adc2ea78b794c769160984c8366a766a5040a8cdc7caa82aec6add18db80da2fa6d8f5b9047
TLSH
T19CC02B4B56C9EA4F290918132AFED4EC92727C593F40BF00C304400D2280449F1DD345
MD5 SHA1 SHA512 TLSH

Submit Download

mepfc9.exe

Path C:\Users\Admin\AppData\Roaming\mepfc9.exe
Size 45KB
SHA256 3fef6a26f8870d7dd7f2a018aaa6bc092349d77110dc7cfeb95bd03bfbdf9f3d
MD5 c58d1de41a5ceeeb6db82955f2acf58f
SHA1 0e1e84feebbbc3aadadbe48ede0d212ff8284cc3
SHA512 2dc434beeb69b73ab0824293f4099dde13b7b77338b0417c829a841c80176b01f503dcd6d58a4131b6a8a0fc4d5176ec900c67484e98e48456e9268d3475e257
SSDEEP 768:QulLJTEs+EgWUKJTGmo2q9qCSwTMSPI5ljbQgX3iO+ortjSVtBDZTx:QulLJTE9X29gG5tbXXS1oxjSVjdTx
TLSH
T1A0232C103BD8813BF2BE4F74A9F261458A7AF6673603D58A1CC4419B5613FC68A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4972-0-0x0000000074B12000-0x0000000074B13000-memory.dmp

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memory/4972-1-0x0000000000D90000-0x0000000000DA2000-memory.dmp

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memory/4972-2-0x0000000074B00000-0x00000000752BC000-memory.dmp

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memory/4972-3-0x0000000005A60000-0x0000000005AFC000-memory.dmp

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memory/4972-9-0x0000000074B00000-0x00000000752BC000-memory.dmp

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memory/5380-12-0x0000000074B00000-0x00000000752BC000-memory.dmp

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memory/5380-14-0x0000000074B00000-0x00000000752BC000-memory.dmp

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