asyncrat | 6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d

Analysis

max time kernel
148s
max time network
151s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/07/2026, 15:50

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General

Target
6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
Size 45KB
Sample260710-s97zpsew6y
SHA256 6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d
MD5 94b932bd47c8ac873a3cbb00e60c1858
SHA1 5a7cc0c90d743eed027ac66aca9cffb336a94022
SHA512 d8a382e55d716e6a0e7828a7d26a7a4488029845fbd9661392e2ce152882572b2204403ebede1f51182bd59b21489a37e1ff94ea018574a69c2dedfe92a8eb93
SSDEEP 768:suJdpTP3tcsWUODmqmo2qVLGsGxJOHuPIKzjbpRgw3irWzX1ydwbdy4aBDZkx:suJdpTPdI2meq3K3bUwSKzMibdy4Edkx
TLSH
T177232C003BE8812BF2BE4F7898F26145867AF6637603D6492CC451DB5623FC6DA426FD
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

fimsec.com:80
fimsec.com:22
fimsec.com:8080
fimsec.com:8880
fimsec.com:2052
fimsec.com:2082
fimsec.com:2086
fimsec.com:2095
fimsec.com:443
fimsec.com:2053
fimsec.com:2083
fimsec.com:2087
fimsec.com:2096
fimsec.com:8443
www.fimsec.com:80
www.fimsec.com:22
www.fimsec.com:8080
www.fimsec.com:8880
www.fimsec.com:2052
www.fimsec.com:2082
www.fimsec.com:2086
www.fimsec.com:2095
www.fimsec.com:443
www.fimsec.com:2053
www.fimsec.com:2083
www.fimsec.com:2087
www.fimsec.com:2096
www.fimsec.com:8443
mydoom.fimsec.com:80
mydoom.fimsec.com:22
mydoom.fimsec.com:8080
mydoom.fimsec.com:8880
mydoom.fimsec.com:2052
mydoom.fimsec.com:2082
mydoom.fimsec.com:2086
mydoom.fimsec.com:2095
mydoom.fimsec.com:443
mydoom.fimsec.com:2053
mydoom.fimsec.com:2083
mydoom.fimsec.com:2087
mydoom.fimsec.com:2096
mydoom.fimsec.com:8443
malware.fimsec.com:80
malware.fimsec.com:22
malware.fimsec.com:8080
malware.fimsec.com:8880
malware.fimsec.com:2052
malware.fimsec.com:2082
malware.fimsec.com:2086
malware.fimsec.com:2095
malware.fimsec.com:443
malware.fimsec.com:2053
malware.fimsec.com:2083
malware.fimsec.com:2087
malware.fimsec.com:2096
malware.fimsec.com:8443
stuxnet.fimsec.com:80
stuxnet.fimsec.com:22
stuxnet.fimsec.com:8080
stuxnet.fimsec.com:8880
stuxnet.fimsec.com:2052
stuxnet.fimsec.com:2082
stuxnet.fimsec.com:2086
stuxnet.fimsec.com:2095
stuxnet.fimsec.com:443
stuxnet.fimsec.com:2053
stuxnet.fimsec.com:2083
stuxnet.fimsec.com:2087
stuxnet.fimsec.com:2096
stuxnet.fimsec.com:8443

Mutex

BNBU7R64mJyn

Attributes

delay
0
install
true
install_file
y41i7esg.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/0x000d00000001c5c1-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2152	y41i7esg.exe
5828	y41i7esg.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	y41i7esg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	y41i7esg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.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
1744	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
4548	schtasks.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
Token: SeDebugPrivilege	2152	y41i7esg.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5012 wrote to memory of 4768	5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe	85
PID 5012 wrote to memory of 3560	5012	6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe	87
PID 4768 wrote to memory of 4548	4768	cmd.exe	89
PID 3560 wrote to memory of 1744	3560	cmd.exe	90
PID 3560 wrote to memory of 5828	3560	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe
"C:\Users\Admin\AppData\Local\Temp\6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5012
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "y41i7esg" /tr '"C:\Users\Admin\AppData\Roaming\y41i7esg.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4768
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "y41i7esg" /tr '"C:\Users\Admin\AppData\Roaming\y41i7esg.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4548
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9D7E.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3560
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1744
- - C:\Users\Admin\AppData\Roaming\y41i7esg.exe
    "C:\Users\Admin\AppData\Roaming\y41i7esg.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5828

C:\Users\Admin\AppData\Roaming\y41i7esg.exe
"C:\Users\Admin\AppData\Roaming\y41i7esg.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2152

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

tmp9D7E.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp9D7E.tmp.bat
Size 152B
SHA256 e03a0b54cd0fa71a1e93c67116f9a9f56c3b2b5aa9999c939e158ee941b9c7ad
MD5 d5ca7a68536aca121fd3699aa2924a4d
SHA1 8c211f9b913e7c3c58eb8e9085ceff1ec10fac3e
SHA512 0c212f8b942297d6903e26051c2972051438096b259406d64fe9bbb76f43aa8d46e26a2415047f19921488fd2d19dffa0c6fd3f2def977686d3b6624213d7510
TLSH
T12FC02B4275C9FA0F7805241313FEE88CA1726C293F84BB00D346825E3280448F0DA355
MD5 SHA1 SHA512 TLSH

Submit Download

y41i7esg.exe

Path C:\Users\Admin\AppData\Roaming\y41i7esg.exe
Size 45KB
SHA256 6813ee249e769f718c74e0dd847e0a4400caf4713d2902c85d6a122affad363d
MD5 94b932bd47c8ac873a3cbb00e60c1858
SHA1 5a7cc0c90d743eed027ac66aca9cffb336a94022
SHA512 d8a382e55d716e6a0e7828a7d26a7a4488029845fbd9661392e2ce152882572b2204403ebede1f51182bd59b21489a37e1ff94ea018574a69c2dedfe92a8eb93
SSDEEP 768:suJdpTP3tcsWUODmqmo2qVLGsGxJOHuPIKzjbpRgw3irWzX1ydwbdy4aBDZkx:suJdpTPdI2meq3K3bUwSKzMibdy4Edkx
TLSH
T177232C003BE8812BF2BE4F7898F26145867AF6637603D6492CC451DB5623FC6DA426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2152-12-0x0000000074CA0000-0x000000007545C000-memory.dmp

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memory/2152-14-0x0000000074CA0000-0x000000007545C000-memory.dmp

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memory/5012-0-0x0000000074E42000-0x0000000074E43000-memory.dmp

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memory/5012-1-0x0000000000E10000-0x0000000000E22000-memory.dmp

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memory/5012-2-0x0000000074E30000-0x00000000755EC000-memory.dmp

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memory/5012-3-0x0000000005800000-0x000000000589C000-memory.dmp

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memory/5012-8-0x0000000074E30000-0x00000000755EC000-memory.dmp

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