asyncrat | 9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be

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
03/08/2026, 19:24

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General

Target
9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
Size 45KB
Sample260803-x4kdnsef29
SHA256 9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be
MD5 074b586d85ee567a4509a99ba857cf64
SHA1 733711f6656178f33e6dc5192c17ff2cc4eb4689
SHA512 a8359527be7a20005080f65ec9d70bcf14271c1e1cfaf96292d8a4f8b1ebf2ae3e1a82778de94f8874feaccbc2ef4e8843c345792c6d7bd5bd4d18edfd7b22fb
SSDEEP 768:cuR0JTPUYkEWUmjWymo2q1N8V1RpPEcPIMzjbzgX3iVidPXcmexBDZUx:cuR0JTPjY2+8VDZEhM3bsXSVwXcmePdW
TLSH
T145231A0037E9822BF2BE4F789CF26145867BF2632603E64A1CC451DB5613BC6DA526FD
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

xcavengon.click:80
xcavengon.click:22
xcavengon.click:8080
xcavengon.click:8880
xcavengon.click:2052
xcavengon.click:2082
xcavengon.click:2086
xcavengon.click:2095
xcavengon.click:443
xcavengon.click:2053
xcavengon.click:2083
xcavengon.click:2087
xcavengon.click:2096
xcavengon.click:8443
www.xcavengon.click:80
www.xcavengon.click:22
www.xcavengon.click:8080
www.xcavengon.click:8880
www.xcavengon.click:2052
www.xcavengon.click:2082
www.xcavengon.click:2086
www.xcavengon.click:2095
www.xcavengon.click:443
www.xcavengon.click:2053
www.xcavengon.click:2083
www.xcavengon.click:2087
www.xcavengon.click:2096
www.xcavengon.click:8443
azorult.xcavengon.click:80
azorult.xcavengon.click:22
azorult.xcavengon.click:8080
azorult.xcavengon.click:8880
azorult.xcavengon.click:2052
azorult.xcavengon.click:2082
azorult.xcavengon.click:2086
azorult.xcavengon.click:2095
azorult.xcavengon.click:443
azorult.xcavengon.click:2053
azorult.xcavengon.click:2083
azorult.xcavengon.click:2087
azorult.xcavengon.click:2096
azorult.xcavengon.click:8443
mydoom.xcavengon.click:80
mydoom.xcavengon.click:22
mydoom.xcavengon.click:8080
mydoom.xcavengon.click:8880
mydoom.xcavengon.click:2052
mydoom.xcavengon.click:2082
mydoom.xcavengon.click:2086
mydoom.xcavengon.click:2095
mydoom.xcavengon.click:443
mydoom.xcavengon.click:2053
mydoom.xcavengon.click:2083
mydoom.xcavengon.click:2087
mydoom.xcavengon.click:2096
mydoom.xcavengon.click:8443

Mutex

D6qIJgf2CPlB

Attributes

delay
0
install
true
install_file
851u.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/0x000e00000001c44d-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2804	851u.exe
1204	851u.exe

Outbound SSH connection to public host 2 TTPs 2 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	8	104.21.10.8:22
SSH destination	12	172.67.189.217:22

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
5508	cmd.exe
4940	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	851u.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.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	851u.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2016	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
5992	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
Token: SeDebugPrivilege	2804	851u.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2956 wrote to memory of 4940	2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe	89
PID 2956 wrote to memory of 5508	2956	9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe	90
PID 4940 wrote to memory of 5992	4940	cmd.exe	93
PID 5508 wrote to memory of 2016	5508	cmd.exe	94
PID 5508 wrote to memory of 1204	5508	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe
"C:\Users\Admin\AppData\Local\Temp\9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2956
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "851u" /tr '"C:\Users\Admin\AppData\Roaming\851u.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4940
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "851u" /tr '"C:\Users\Admin\AppData\Roaming\851u.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5992
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp17A5.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5508
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2016
- - C:\Users\Admin\AppData\Roaming\851u.exe
    "C:\Users\Admin\AppData\Roaming\851u.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1204

C:\Users\Admin\AppData\Roaming\851u.exe
"C:\Users\Admin\AppData\Roaming\851u.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2804

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

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Downloads

tmp17A5.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp17A5.tmp.bat
Size 148B
SHA256 8916054cab0d92ad997b3e67e98f130e3eb6c0b5d74ea980e0c62fe118c362b9
MD5 164fbdf0c53cb81097835718fdf1c009
SHA1 ad9bb5e86ca5b5889c0e95ce908f59f03b81607a
SHA512 53cfb8c85b000a3cf018edb88f975dd8627cd3f7d183c61366cd9e84cf8126f3cf2db785028219345c595a89023ca6ae14511d35faa978446eb0af1a6c94b136
TLSH
T112C02B4295C5FA4E3809246303FED59DB2726C693F40BB04C304800D5280488F0D9341
MD5 SHA1 SHA512 TLSH

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851u.exe

Path C:\Users\Admin\AppData\Roaming\851u.exe
Size 45KB
SHA256 9876121c0284852febfb79490d9b7f0327a6680c16aad36bb3e87a72b5c738be
MD5 074b586d85ee567a4509a99ba857cf64
SHA1 733711f6656178f33e6dc5192c17ff2cc4eb4689
SHA512 a8359527be7a20005080f65ec9d70bcf14271c1e1cfaf96292d8a4f8b1ebf2ae3e1a82778de94f8874feaccbc2ef4e8843c345792c6d7bd5bd4d18edfd7b22fb
SSDEEP 768:cuR0JTPUYkEWUmjWymo2q1N8V1RpPEcPIMzjbzgX3iVidPXcmexBDZUx:cuR0JTPjY2+8VDZEhM3bsXSVwXcmePdW
TLSH
T145231A0037E9822BF2BE4F789CF26145867BF2632603E64A1CC451DB5613BC6DA526FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2804-12-0x0000000074D70000-0x000000007552C000-memory.dmp

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memory/2804-14-0x0000000074D70000-0x000000007552C000-memory.dmp

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memory/2956-0-0x0000000074EE2000-0x0000000074EE3000-memory.dmp

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memory/2956-1-0x00000000008F0000-0x0000000000902000-memory.dmp

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memory/2956-2-0x0000000074ED0000-0x000000007568C000-memory.dmp

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memory/2956-3-0x00000000053E0000-0x000000000547C000-memory.dmp

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memory/2956-8-0x0000000074ED0000-0x000000007568C000-memory.dmp

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