asyncrat | cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9

Analysis

max time kernel
148s
max time network
145s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
21/08/2026, 16:19

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General

Target
cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
Size 45KB
Sample260821-tsknhscc28
SHA256 cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9
MD5 1b81b9dd6e440a8bc2952e1af5750a2e
SHA1 7ece62bf645ee13152a44adef9942014b9555a9c
SHA512 2f4bb20acbef16c079730cd82ba57ab4bfdb63213238b2fa26e01eec6b78d35011484698ef40714abed25f601ad5892bef1e328d05929a9d3d47cf3aebc72ddc
SSDEEP 768:cu6RaepTPYzbs8WU+Xaamo2q1n+GtnVnJtHuPIWzjbCgX3idke4qVzm5RJBDZUx:cu6YepTPso2M++B3W3blXSajqVzm5RX0
TLSH
T1B4231A003BE8812BF2BE5FB8A8F26145467EF2632603D68D2CC451D75613FC6DA526ED
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

e.streamforester.name:80
e.streamforester.name:22
e.streamforester.name:8080
e.streamforester.name:8880
e.streamforester.name:2052
e.streamforester.name:2082
e.streamforester.name:2086
e.streamforester.name:2095
e.streamforester.name:443
e.streamforester.name:2053
e.streamforester.name:2083
e.streamforester.name:2087
e.streamforester.name:2096
e.streamforester.name:8443
www.e.streamforester.name:80
www.e.streamforester.name:22
www.e.streamforester.name:8080
www.e.streamforester.name:8880
www.e.streamforester.name:2052
www.e.streamforester.name:2082
www.e.streamforester.name:2086
www.e.streamforester.name:2095
www.e.streamforester.name:443
www.e.streamforester.name:2053
www.e.streamforester.name:2083
www.e.streamforester.name:2087
www.e.streamforester.name:2096
www.e.streamforester.name:8443
clop.e.streamforester.name:80
clop.e.streamforester.name:22
clop.e.streamforester.name:8080
clop.e.streamforester.name:8880
clop.e.streamforester.name:2052
clop.e.streamforester.name:2082
clop.e.streamforester.name:2086
clop.e.streamforester.name:2095
clop.e.streamforester.name:443
clop.e.streamforester.name:2053
clop.e.streamforester.name:2083
clop.e.streamforester.name:2087
clop.e.streamforester.name:2096
clop.e.streamforester.name:8443
socgholish.e.streamforester.name:80
socgholish.e.streamforester.name:22
socgholish.e.streamforester.name:8080
socgholish.e.streamforester.name:8880
socgholish.e.streamforester.name:2052
socgholish.e.streamforester.name:2082
socgholish.e.streamforester.name:2086
socgholish.e.streamforester.name:2095
socgholish.e.streamforester.name:443
socgholish.e.streamforester.name:2053
socgholish.e.streamforester.name:2083
socgholish.e.streamforester.name:2087
socgholish.e.streamforester.name:2096
socgholish.e.streamforester.name:8443

Mutex

KxWoAvcD9XXF

Attributes

delay
0
install
true
install_file
1euyr79f.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/0x000d00000001c54f-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2836	1euyr79f.exe
4964	1euyr79f.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	6	104.26.5.5:22
SSH destination	7	104.26.4.5:22
SSH destination	9	172.67.70.147:22

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
5112	cmd.exe
2176	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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1euyr79f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1euyr79f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.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
4888	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
1972	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
Token: SeDebugPrivilege	2836	1euyr79f.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5540 wrote to memory of 5112	5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe	89
PID 5540 wrote to memory of 2176	5540	cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe	91
PID 5112 wrote to memory of 1972	5112	cmd.exe	93
PID 2176 wrote to memory of 4888	2176	cmd.exe	94
PID 2176 wrote to memory of 4964	2176	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe
"C:\Users\Admin\AppData\Local\Temp\cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5540
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "1euyr79f" /tr '"C:\Users\Admin\AppData\Roaming\1euyr79f.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5112
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "1euyr79f" /tr '"C:\Users\Admin\AppData\Roaming\1euyr79f.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1972
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp58C5.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2176
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4888
- - C:\Users\Admin\AppData\Roaming\1euyr79f.exe
    "C:\Users\Admin\AppData\Roaming\1euyr79f.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4964

C:\Users\Admin\AppData\Roaming\1euyr79f.exe
"C:\Users\Admin\AppData\Roaming\1euyr79f.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2836

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:5636

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

tmp58C5.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp58C5.tmp.bat
Size 152B
SHA256 2671c09774faec970b3ffa251259fe1abd050f8c97b838dd25ee1e2e4d64bec5
MD5 0835fd22849657940a273f7c9d125b1e
SHA1 e10d162abc8de637481b566310b3cec47cbbcfa4
SHA512 13fc312867df54a4a0e423889fca795b2a6a56d71d2426a4af855fac48e63642cc0aff941cc3011540d87d7da10b6e173a1b166f2e78fd5e7a3bcc6c730f4a4a
TLSH
T171C02B4256C5FA4F2C49143302FED98CE1B27C6A3F80BB00C308444E7281489F0DD3C6
MD5 SHA1 SHA512 TLSH

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1euyr79f.exe

Path C:\Users\Admin\AppData\Roaming\1euyr79f.exe
Size 45KB
SHA256 cffb88597823d7f9e36b43751b378842bd5617c95f57108bc23ff6ea1b441ac9
MD5 1b81b9dd6e440a8bc2952e1af5750a2e
SHA1 7ece62bf645ee13152a44adef9942014b9555a9c
SHA512 2f4bb20acbef16c079730cd82ba57ab4bfdb63213238b2fa26e01eec6b78d35011484698ef40714abed25f601ad5892bef1e328d05929a9d3d47cf3aebc72ddc
SSDEEP 768:cu6RaepTPYzbs8WU+Xaamo2q1n+GtnVnJtHuPIWzjbCgX3idke4qVzm5RJBDZUx:cu6YepTPso2M++B3W3blXSajqVzm5RX0
TLSH
T1B4231A003BE8812BF2BE5FB8A8F26145467EF2632603D68D2CC451D75613FC6DA526ED
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2836-12-0x0000000074470000-0x0000000074C2C000-memory.dmp

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memory/2836-14-0x0000000074470000-0x0000000074C2C000-memory.dmp

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memory/5540-0-0x0000000074652000-0x0000000074653000-memory.dmp

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memory/5540-1-0x0000000000900000-0x0000000000912000-memory.dmp

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memory/5540-2-0x0000000074640000-0x0000000074DFC000-memory.dmp

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memory/5540-3-0x0000000005480000-0x000000000551C000-memory.dmp

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memory/5540-8-0x0000000074640000-0x0000000074DFC000-memory.dmp

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