asyncrat | b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f

Analysis

max time kernel
6s
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
02/08/2026, 16:07

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General

Target
b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
Size 45KB
Sample260802-tkpbqsstct
SHA256 b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f
MD5 8656e4bfa9d713f3851eb4402000c16b
SHA1 caf5d9f0508cecd350e358d2076eee1ce5a1f29c
SHA512 40025aca2d0fcb81dc555355e29b52c267b44353d3a32b84b81b6ebb2a0ba5fcb28a28c50c62371c1b6c9e4168823b154c6f6de5279d7dc642a9217a27283d71
SSDEEP 768:QuflpT8AkKuWUch7wmo2q9KiScy3zlOPIxzjbRgY3ifecijCuXsBDZTx:QuflpT8Hv23i963x3beYSfeFjCuXqdTx
TLSH
T113233A003BE8812BF2BE4F7899F26145457AF6633603D94A1CC452DB5713FC69A426FD
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

sexybeam.me:80
sexybeam.me:22
sexybeam.me:8080
sexybeam.me:8880
sexybeam.me:2052
sexybeam.me:2082
sexybeam.me:2086
sexybeam.me:2095
sexybeam.me:443
sexybeam.me:2053
sexybeam.me:2083
sexybeam.me:2087
sexybeam.me:2096
sexybeam.me:8443
www.sexybeam.me:80
www.sexybeam.me:22
www.sexybeam.me:8080
www.sexybeam.me:8880
www.sexybeam.me:2052
www.sexybeam.me:2082
www.sexybeam.me:2086
www.sexybeam.me:2095
www.sexybeam.me:443
www.sexybeam.me:2053
www.sexybeam.me:2083
www.sexybeam.me:2087
www.sexybeam.me:2096
www.sexybeam.me:8443
gozi.sexybeam.me:80
gozi.sexybeam.me:22
gozi.sexybeam.me:8080
gozi.sexybeam.me:8880
gozi.sexybeam.me:2052
gozi.sexybeam.me:2082
gozi.sexybeam.me:2086
gozi.sexybeam.me:2095
gozi.sexybeam.me:443
gozi.sexybeam.me:2053
gozi.sexybeam.me:2083
gozi.sexybeam.me:2087
gozi.sexybeam.me:2096
gozi.sexybeam.me:8443
locky.sexybeam.me:80
locky.sexybeam.me:22
locky.sexybeam.me:8080
locky.sexybeam.me:8880
locky.sexybeam.me:2052
locky.sexybeam.me:2082
locky.sexybeam.me:2086
locky.sexybeam.me:2095
locky.sexybeam.me:443
locky.sexybeam.me:2053
locky.sexybeam.me:2083
locky.sexybeam.me:2087
locky.sexybeam.me:2096
locky.sexybeam.me:8443

Mutex

MFHVz5cS71LP

Attributes

delay
0
install
true
install_file
yazgrdn.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/0x000d00000001c576-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
5048	yazgrdn.exe
5068	yazgrdn.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
120	cmd.exe
1508	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	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.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	yazgrdn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yazgrdn.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1740	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
1324	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
Token: SeDebugPrivilege	5048	yazgrdn.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5112 wrote to memory of 1508	5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe	89
PID 5112 wrote to memory of 120	5112	b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe	91
PID 1508 wrote to memory of 1324	1508	cmd.exe	93
PID 120 wrote to memory of 1740	120	cmd.exe	94
PID 120 wrote to memory of 5068	120	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe
"C:\Users\Admin\AppData\Local\Temp\b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5112
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "yazgrdn" /tr '"C:\Users\Admin\AppData\Roaming\yazgrdn.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1508
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "yazgrdn" /tr '"C:\Users\Admin\AppData\Roaming\yazgrdn.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1324
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4694.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:120
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1740
- - C:\Users\Admin\AppData\Roaming\yazgrdn.exe
    "C:\Users\Admin\AppData\Roaming\yazgrdn.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5068

C:\Users\Admin\AppData\Roaming\yazgrdn.exe
"C:\Users\Admin\AppData\Roaming\yazgrdn.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5048

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

tmp4694.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4694.tmp.bat
Size 151B
SHA256 b957ede43ce16e24d32c7f90c4ff46f5a3003660885ad0fd394fca893ff12ed7
MD5 5b41c5aa14f8c23d2050bbe2a11a9689
SHA1 67be3f65e8350b604a250594ae05dc3b1d02d2e3
SHA512 18ea0c0d896c8a9aff52917f650852f75dd50ba302e6a7d0932361b7efd4d04478874f488465d1b3fa00ff67bd63bb941c67882f90dc310861429183216e2265
TLSH
T178C02B4351CDFA5E2C05241312FAF48D92B2BC1D3F44BB10C704415E13C0868F0E9741
MD5 SHA1 SHA512 TLSH

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yazgrdn.exe

Path C:\Users\Admin\AppData\Roaming\yazgrdn.exe
Size 45KB
SHA256 b9dcfef012a962ec3e730c6682678783592bdc4cef0f03529b0aaa1b329ed80f
MD5 8656e4bfa9d713f3851eb4402000c16b
SHA1 caf5d9f0508cecd350e358d2076eee1ce5a1f29c
SHA512 40025aca2d0fcb81dc555355e29b52c267b44353d3a32b84b81b6ebb2a0ba5fcb28a28c50c62371c1b6c9e4168823b154c6f6de5279d7dc642a9217a27283d71
SSDEEP 768:QuflpT8AkKuWUch7wmo2q9KiScy3zlOPIxzjbRgY3ifecijCuXsBDZTx:QuflpT8Hv23i963x3beYSfeFjCuXqdTx
TLSH
T113233A003BE8812BF2BE4F7899F26145457AF6633603D94A1CC452DB5713FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/5048-12-0x0000000074FE0000-0x000000007579C000-memory.dmp

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memory/5048-14-0x0000000074FE0000-0x000000007579C000-memory.dmp

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memory/5112-0-0x0000000074FF2000-0x0000000074FF3000-memory.dmp

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memory/5112-1-0x0000000000C90000-0x0000000000CA2000-memory.dmp

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memory/5112-2-0x0000000074FE0000-0x000000007579C000-memory.dmp

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memory/5112-3-0x0000000005800000-0x000000000589C000-memory.dmp

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memory/5112-8-0x0000000074FE0000-0x000000007579C000-memory.dmp

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