asyncrat | 0c491272208bf4c0bd3d3802df6e4056738706b3e71bc531532797dc73777e0a

Analysis

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

arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
02/07/2026, 02:01

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General

Target
bvnrtyfgh.exe
Size 45KB
Sample260702-cfxzmsaz3x
SHA256 0c491272208bf4c0bd3d3802df6e4056738706b3e71bc531532797dc73777e0a
MD5 3612b329aae5afb6cf070d4d4308c34c
SHA1 5f4c85f9d02acc6ca6e256210de2ea032c8dfbd5
SHA512 095cc7d293ff271fca3416f95854fd61a53e1096b9656c7c5aacc67bd76ecddee8af63e891ba18234a669e5a8c60382838816ebadbebfcdf055652d860cc6784
SSDEEP 768:VumU1TQwtPtWUNt1nmo2qz9A8rPerBOPIczjb8g/3iOpQ/un38x4GGvZBDZix:VumU1TQq72gA8Gt3c3bT/SOsun3g1Edg
TLSH
T11E232A003BE88227F1BE5FB8ACF26145467AF1677603D94D2CC441DB5613BC69642AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

admin defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Admin

sexdeo.net:80
sexdeo.net:443
www.sexdeo.net:80
www.sexdeo.net:443
ssh.sexdeo.net:80
ssh.sexdeo.net:443

Mutex

JUx4XR7A4dFQ

Attributes

delay
3
install
true
install_file
bvnrtyfgh.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/0x0005000000016cdb-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
828	bvnrtyfgh.exe
5756	bvnrtyfgh.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	bvnrtyfgh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bvnrtyfgh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bvnrtyfgh.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
712	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
3864	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe
2204	bvnrtyfgh.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2204	bvnrtyfgh.exe
Token: SeDebugPrivilege	828	bvnrtyfgh.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 2592	2204	bvnrtyfgh.exe	88
PID 2204 wrote to memory of 4768	2204	bvnrtyfgh.exe	90
PID 2592 wrote to memory of 3864	2592	cmd.exe	92
PID 4768 wrote to memory of 712	4768	cmd.exe	93
PID 4768 wrote to memory of 5756	4768	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\bvnrtyfgh.exe
"C:\Users\Admin\AppData\Local\Temp\bvnrtyfgh.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "bvnrtyfgh" /tr '"C:\Users\Admin\AppData\Roaming\bvnrtyfgh.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2592
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "bvnrtyfgh" /tr '"C:\Users\Admin\AppData\Roaming\bvnrtyfgh.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3864
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCB8.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4768
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:712
- - C:\Users\Admin\AppData\Roaming\bvnrtyfgh.exe
    "C:\Users\Admin\AppData\Roaming\bvnrtyfgh.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5756

C:\Users\Admin\AppData\Roaming\bvnrtyfgh.exe
"C:\Users\Admin\AppData\Roaming\bvnrtyfgh.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:828

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

tmpCB8.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpCB8.tmp.bat
Size 152B
SHA256 9296f071818ce140ab89e7654a2597a7ba557205149f891ed4f813273eb5c63b
MD5 672aafc366713501dfe9c57f7593e0e7
SHA1 ce9020ca11cc51c5e45eedcd830624a70089210b
SHA512 3d8a76b53b94ddc2bc421f63e5520b5c3bb32f8012c08afbb67622c48aaf4b8515f3d8cf3e08551da9f5c155658126d7d36771ce169665c95c1fd9906bcfd74f
TLSH
T1E8C08C8251C6AA4F290A181313BA98AE91676CA93E80AB50C304840A6780448F499385
MD5 SHA1 SHA512 TLSH

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bvnrtyfgh.exe

Path C:\Users\Admin\AppData\Roaming\bvnrtyfgh.exe
Size 45KB
SHA256 0c491272208bf4c0bd3d3802df6e4056738706b3e71bc531532797dc73777e0a
MD5 3612b329aae5afb6cf070d4d4308c34c
SHA1 5f4c85f9d02acc6ca6e256210de2ea032c8dfbd5
SHA512 095cc7d293ff271fca3416f95854fd61a53e1096b9656c7c5aacc67bd76ecddee8af63e891ba18234a669e5a8c60382838816ebadbebfcdf055652d860cc6784
SSDEEP 768:VumU1TQwtPtWUNt1nmo2qz9A8rPerBOPIczjb8g/3iOpQ/un38x4GGvZBDZix:VumU1TQq72gA8Gt3c3bT/SOsun3g1Edg
TLSH
T11E232A003BE88227F1BE5FB8ACF26145467AF1677603D94D2CC441DB5613BC69642AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/828-12-0x00000000747D0000-0x0000000074F8C000-memory.dmp

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memory/828-14-0x00000000747D0000-0x0000000074F8C000-memory.dmp

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memory/2204-0-0x00000000749E2000-0x00000000749E3000-memory.dmp

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memory/2204-1-0x0000000000360000-0x0000000000372000-memory.dmp

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memory/2204-2-0x00000000749D0000-0x000000007518C000-memory.dmp

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memory/2204-3-0x0000000004ED0000-0x0000000004F6C000-memory.dmp

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memory/2204-8-0x00000000749D0000-0x000000007518C000-memory.dmp

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