asyncrat | 604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc

Analysis

max time kernel
148s
max time network
150s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
05/08/2026, 08:50

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General

Target
604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
Size 45KB
Sample260805-krtqcsge26
SHA256 604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc
MD5 502f2514eb82d2795e1a171a27b79849
SHA1 39daa95876f431b9057519ae1fd5eb3d209925d1
SHA512 8f417feca1b4e9909f5065bbcfca41b7df4ec51367fae312d0d940d1c31bd99f563edcd777533783eeb12321cb4b6a3fc821cb0456c9802ece8c05e3f70a6a20
SSDEEP 768:cu7m/5THrq+CWUoDuMmo2qFD3xK6yZoOPItzjbvgO3igusjL+KodVocBDZUx:cu7e5TH2A22cPo3t3bYOSAjyKO/dUx
TLSH
T1F2233B003BEC822BF2BE4F7899F26145857AF6A33603D54A1CC452DB5613FC69A426FD
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
ursnif.xcavengon.click:80
ursnif.xcavengon.click:22
ursnif.xcavengon.click:8080
ursnif.xcavengon.click:8880
ursnif.xcavengon.click:2052
ursnif.xcavengon.click:2082
ursnif.xcavengon.click:2086
ursnif.xcavengon.click:2095
ursnif.xcavengon.click:443
ursnif.xcavengon.click:2053
ursnif.xcavengon.click:2083
ursnif.xcavengon.click:2087
ursnif.xcavengon.click:2096
ursnif.xcavengon.click:8443
sobig.xcavengon.click:80
sobig.xcavengon.click:22
sobig.xcavengon.click:8080
sobig.xcavengon.click:8880
sobig.xcavengon.click:2052
sobig.xcavengon.click:2082
sobig.xcavengon.click:2086
sobig.xcavengon.click:2095
sobig.xcavengon.click:443
sobig.xcavengon.click:2053
sobig.xcavengon.click:2083
sobig.xcavengon.click:2087
sobig.xcavengon.click:2096
sobig.xcavengon.click:8443

Mutex

3GJQXFNagri7

Attributes

delay
0
install
true
install_file
a76zk.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/0x000d00000001c53c-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2928	a76zk.exe
2784	a76zk.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	104.21.10.8:22
SSH destination	4	172.67.189.217:22
SSH destination	12	104.21.10.8:22

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
1788	cmd.exe
3384	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	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	a76zk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a76zk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2532	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
3216	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
Token: SeDebugPrivilege	2928	a76zk.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3692 wrote to memory of 1788	3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe	89
PID 3692 wrote to memory of 3384	3692	604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe	90
PID 1788 wrote to memory of 3216	1788	cmd.exe	93
PID 3384 wrote to memory of 2532	3384	cmd.exe	95
PID 3384 wrote to memory of 2784	3384	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe
"C:\Users\Admin\AppData\Local\Temp\604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3692
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "a76zk" /tr '"C:\Users\Admin\AppData\Roaming\a76zk.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1788
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "a76zk" /tr '"C:\Users\Admin\AppData\Roaming\a76zk.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3216
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp52C9.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3384
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2532
- - C:\Users\Admin\AppData\Roaming\a76zk.exe
    "C:\Users\Admin\AppData\Roaming\a76zk.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2784

C:\Users\Admin\AppData\Roaming\a76zk.exe
"C:\Users\Admin\AppData\Roaming\a76zk.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2928

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

tmp52C9.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp52C9.tmp.bat
Size 149B
SHA256 55961ddb7e570e6c9910ff669c028ba4cd2ee0060115d822071c30f19dfa82b0
MD5 db2479683c6895b97c85f8bb4e0c554c
SHA1 11cec1177b8cbf19e3243f516ceac861705fad90
SHA512 243c9cde04f3e65d4d83af480ccb10daacce766b24080b010cedbe8b4045680144c065d6b9b702df33604dc82241f67c75609ac2f7b04e60b6868073d9f9687f
TLSH
T10DC02B8291CAFF1E7905141702FED98CA1B26C1A3F40BF00C304810F178184AF0D9381
MD5 SHA1 SHA512 TLSH

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a76zk.exe

Path C:\Users\Admin\AppData\Roaming\a76zk.exe
Size 45KB
SHA256 604e89623be4f4e71bce3950a5ae3d3c3fc2bd8805115815858e09d100cb9adc
MD5 502f2514eb82d2795e1a171a27b79849
SHA1 39daa95876f431b9057519ae1fd5eb3d209925d1
SHA512 8f417feca1b4e9909f5065bbcfca41b7df4ec51367fae312d0d940d1c31bd99f563edcd777533783eeb12321cb4b6a3fc821cb0456c9802ece8c05e3f70a6a20
SSDEEP 768:cu7m/5THrq+CWUoDuMmo2qFD3xK6yZoOPItzjbvgO3igusjL+KodVocBDZUx:cu7e5TH2A22cPo3t3bYOSAjyKO/dUx
TLSH
T1F2233B003BEC822BF2BE4F7899F26145857AF6A33603D54A1CC452DB5613FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2928-12-0x00000000746C0000-0x0000000074E7C000-memory.dmp

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memory/2928-14-0x00000000746C0000-0x0000000074E7C000-memory.dmp

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memory/3692-0-0x00000000748C2000-0x00000000748C3000-memory.dmp

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memory/3692-1-0x00000000007F0000-0x0000000000802000-memory.dmp

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memory/3692-2-0x00000000748B0000-0x000000007506C000-memory.dmp

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memory/3692-3-0x0000000005230000-0x00000000052CC000-memory.dmp

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memory/3692-8-0x00000000748B0000-0x000000007506C000-memory.dmp

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