asyncrat | 8256146b9ee65aa407ad055db27802dcc7b85084cba09c050432b09639d724f4

Analysis

max time kernel
148s
max time network
118s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260629-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
05/07/2026, 06:39

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General

Target
hay88.exe
Size 45KB
Sample260705-hew9lsaw91
SHA256 8256146b9ee65aa407ad055db27802dcc7b85084cba09c050432b09639d724f4
MD5 d169c99bf02286366fa31c6da57206a0
SHA1 bd3c082b5fa76ba79921a84d453eaf243844882e
SHA512 ec1394ceb3944150dbe4f85877edf6d2369d69c97793f36fd3b08eb99f371be7e148923780ad273cdc4dd09a8c7dee807e82292413b6ad28505848f528137e32
SSDEEP 768:Ju+M1TFNzX1WUV/DuPmo2qjSfBohEa+PIvljbKgX3ibJMKHJDEYEEYOWrxBDZbx:Ju+M1TFlJ42l4EaHvtbdXSyQtzESiPdV
TLSH
T1BE232C003BE8C26BF2BE4F78ACF26145457AF2632603D5492CC451DB5713FC69A526FA
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

essenzalubricantes.com.co/vi-vn/:80
essenzalubricantes.com.co/vi-vn/:8080
essenzalubricantes.com.co/vi-vn/:443
essenzalubricantes.com.co/vi-vn/:8443
essenzalubricantes.com.co/vi-vn/:3306
essenzalubricantes.com.co/vi-vn/:20
essenzalubricantes.com.co/vi-vn/:25
essenzalubricantes.com.co/vi-vn/:22

Mutex

nApyQctkNIMR

Attributes

delay
3
install
true
install_file
hay88.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/0x000d00000001c5f2-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
4560	hay88.exe
2596	hay88.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	hay88.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	hay88.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	hay88.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
616	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
5232	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe
4456	hay88.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4456	hay88.exe
Token: SeDebugPrivilege	4560	hay88.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 1676	4456	hay88.exe	87
PID 4456 wrote to memory of 4512	4456	hay88.exe	88
PID 1676 wrote to memory of 5232	1676	cmd.exe	91
PID 4512 wrote to memory of 616	4512	cmd.exe	92
PID 4512 wrote to memory of 2596	4512	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\hay88.exe
"C:\Users\Admin\AppData\Local\Temp\hay88.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4456
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "hay88" /tr '"C:\Users\Admin\AppData\Roaming\hay88.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1676
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "hay88" /tr '"C:\Users\Admin\AppData\Roaming\hay88.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5232
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3147.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4512
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:616
- - C:\Users\Admin\AppData\Roaming\hay88.exe
    "C:\Users\Admin\AppData\Roaming\hay88.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2596

C:\Users\Admin\AppData\Roaming\hay88.exe
"C:\Users\Admin\AppData\Roaming\hay88.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4560

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

tmp3147.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp3147.tmp.bat
Size 149B
SHA256 42397b4366aa0183e21b4fd9d507babbabbdedde962fd4ccaf22f071e99ccfdb
MD5 fcd815e23fe507ee526ff9acf9aabdd2
SHA1 1b509e87ee138360c2aea5d697eb60ec53761937
SHA512 d0c51e756659d7d1a880d22e3b638d7859f9d23391f80d98232381a3046b2067193dedb384337cebea494c47ce9f87f256bf6638c78e8a40ecc580622714b7af
TLSH
T17BC02B9265C5FE0F2C05242302FBD48D9172AC293F40FB40C34B4C0E66C0848F0F9385
MD5 SHA1 SHA512 TLSH

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hay88.exe

Path C:\Users\Admin\AppData\Roaming\hay88.exe
Size 45KB
SHA256 8256146b9ee65aa407ad055db27802dcc7b85084cba09c050432b09639d724f4
MD5 d169c99bf02286366fa31c6da57206a0
SHA1 bd3c082b5fa76ba79921a84d453eaf243844882e
SHA512 ec1394ceb3944150dbe4f85877edf6d2369d69c97793f36fd3b08eb99f371be7e148923780ad273cdc4dd09a8c7dee807e82292413b6ad28505848f528137e32
SSDEEP 768:Ju+M1TFNzX1WUV/DuPmo2qjSfBohEa+PIvljbKgX3ibJMKHJDEYEEYOWrxBDZbx:Ju+M1TFlJ42l4EaHvtbdXSyQtzESiPdV
TLSH
T1BE232C003BE8C26BF2BE4F78ACF26145457AF2632603D5492CC451DB5713FC69A526FA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4456-0-0x0000000074452000-0x0000000074453000-memory.dmp

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memory/4456-1-0x0000000000F20000-0x0000000000F32000-memory.dmp

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memory/4456-2-0x0000000074440000-0x0000000074BFC000-memory.dmp

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memory/4456-3-0x00000000058D0000-0x000000000596C000-memory.dmp

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memory/4456-9-0x0000000074440000-0x0000000074BFC000-memory.dmp

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memory/4560-12-0x0000000074440000-0x0000000074BFC000-memory.dmp

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memory/4560-14-0x0000000074440000-0x0000000074BFC000-memory.dmp

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