asyncrat | b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d

Analysis

max time kernel
7s
max time network
154s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
07/09/2026, 12:30

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General

Target
b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
Size 45KB
Sample260907-ppe7eagh39
SHA256 b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d
MD5 7422eed2892a0da38ab60dad0667d2ff
SHA1 19a948fbd7c25c0b84db6a12c6bdf79c3a58d44f
SHA512 02c3d9c7f9f108e17108737b21f6cb1fa83b516c06e3bfe817acb8a724431c05320069b56425268fa5342fd592f940c0282f84d0eef31d9eb6a257985d84fd34
SSDEEP 768:4uBfJTMUyYUWUWBDimo2qVb9PLziqyvtLjZPIvzjbZgX0ie7vQ/RC08yq/JnBDZV:4uBfJTMpv2G9HivVjWv3b2XRe745R8n/
TLSH
T16D232B003BE9812BF2BE4F78A8F25145867AF1672603D64D1CC451DB5723FC69A42AFD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default command_and_control defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

coisex.org:80
coisex.org:22
coisex.org:8080
coisex.org:8880
coisex.org:2052
coisex.org:2082
coisex.org:2086
coisex.org:2095
coisex.org:443
coisex.org:2053
coisex.org:2083
coisex.org:2087
coisex.org:2096
coisex.org:8443
www.coisex.org:80
www.coisex.org:22
www.coisex.org:8080
www.coisex.org:8880
www.coisex.org:2052
www.coisex.org:2082
www.coisex.org:2086
www.coisex.org:2095
www.coisex.org:443
www.coisex.org:2053
www.coisex.org:2083
www.coisex.org:2087
www.coisex.org:2096
www.coisex.org:8443
sasser.coisex.org:80
sasser.coisex.org:22
sasser.coisex.org:8080
sasser.coisex.org:8880
sasser.coisex.org:2052
sasser.coisex.org:2082
sasser.coisex.org:2086
sasser.coisex.org:2095
sasser.coisex.org:443
sasser.coisex.org:2053
sasser.coisex.org:2083
sasser.coisex.org:2087
sasser.coisex.org:2096
sasser.coisex.org:8443
shamoon.coisex.org:80
shamoon.coisex.org:22
shamoon.coisex.org:8080
shamoon.coisex.org:8880
shamoon.coisex.org:2052
shamoon.coisex.org:2082
shamoon.coisex.org:2086
shamoon.coisex.org:2095
shamoon.coisex.org:443
shamoon.coisex.org:2053
shamoon.coisex.org:2083
shamoon.coisex.org:2087
shamoon.coisex.org:2096
shamoon.coisex.org:8443

Mutex

7jeojxMh2UGW

Attributes

delay
0
install
true
install_file
9vrn.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/0x000c000000019c8f-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3340	9vrn.exe
6040	9vrn.exe

Outbound SSH connection to public host 2 TTPs 3 IoCs

SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

command_and_control

Protocol Tunneling

T1572

Network Service Discovery

T1046

description	flow	ioc
SSH destination	2	185.4.113.142:22
SSH destination	7	185.4.113.142:22
SSH destination	16	185.4.113.142:22

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
5840	cmd.exe
2996	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	9vrn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9vrn.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5976	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
2824	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4300 wrote to memory of 5840	4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe	90
PID 4300 wrote to memory of 2996	4300	b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe	91
PID 5840 wrote to memory of 2824	5840	cmd.exe	94
PID 2996 wrote to memory of 5976	2996	cmd.exe	95
PID 2996 wrote to memory of 6040	2996	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe
"C:\Users\Admin\AppData\Local\Temp\b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4300
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "9vrn" /tr '"C:\Users\Admin\AppData\Roaming\9vrn.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5840
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "9vrn" /tr '"C:\Users\Admin\AppData\Roaming\9vrn.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2824
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6A97.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2996
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5976
- - C:\Users\Admin\AppData\Roaming\9vrn.exe
    "C:\Users\Admin\AppData\Roaming\9vrn.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:6040

C:\Users\Admin\AppData\Roaming\9vrn.exe
"C:\Users\Admin\AppData\Roaming\9vrn.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3340

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:5436

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

Network Service Discovery

T1046

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

T1572

Exfiltration

Impact

Replay Monitor

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Downloads

tmp6A97.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp6A97.tmp.bat
Size 148B
SHA256 015c35b2133ae216769fe0d1468123a941c4eb7050ba40f535a0ace367d2c06d
MD5 00da5c0d5a8ed04dd70198d848c7c01d
SHA1 5770535c2efd586f8f4f6cd64022e836c67009f8
SHA512 2f2e9f339191eacd82aba3e78805596fc26475cb28885e5f55b23da519b45b1a77251eb4c204c125a090d27909bdee53d227b5d32193d6a3dd78fb49f6104fd9
TLSH
T13FC02B4291C5EA1F3905181316FBD58C91B2BC1D3F40BB00C304401E23C044DF4DA341
MD5 SHA1 SHA512 TLSH

Submit Download

9vrn.exe

Path C:\Users\Admin\AppData\Roaming\9vrn.exe
Size 45KB
SHA256 b3fb9dcc03ef1f89471d4212c145899f71178b12af07ecb545db6d2deb793f1d
MD5 7422eed2892a0da38ab60dad0667d2ff
SHA1 19a948fbd7c25c0b84db6a12c6bdf79c3a58d44f
SHA512 02c3d9c7f9f108e17108737b21f6cb1fa83b516c06e3bfe817acb8a724431c05320069b56425268fa5342fd592f940c0282f84d0eef31d9eb6a257985d84fd34
SSDEEP 768:4uBfJTMUyYUWUWBDimo2qVb9PLziqyvtLjZPIvzjbZgX0ie7vQ/RC08yq/JnBDZV:4uBfJTMpv2G9HivVjWv3b2XRe745R8n/
TLSH
T16D232B003BE9812BF2BE4F78A8F25145867AF1672603D64D1CC451DB5723FC69A42AFD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3340-12-0x00000000748C0000-0x000000007507C000-memory.dmp

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memory/3340-14-0x00000000748C0000-0x000000007507C000-memory.dmp

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memory/4300-0-0x00000000749E2000-0x00000000749E3000-memory.dmp

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memory/4300-1-0x00000000006E0000-0x00000000006F2000-memory.dmp

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memory/4300-2-0x00000000749D0000-0x000000007518C000-memory.dmp

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memory/4300-3-0x0000000005090000-0x000000000512C000-memory.dmp

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memory/4300-8-0x00000000749D0000-0x000000007518C000-memory.dmp

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