asyncrat | 8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31

Analysis

max time kernel
6s
max time network
152s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
16/08/2026, 07:37

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General

Target
8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
Size 45KB
Sample260816-jfyphasfkg
SHA256 8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31
MD5 d2ce555f2c0c9e37c6da4a4508bab2ca
SHA1 3cba7daa6cf678aa0e748af242c15826eb60d3e1
SHA512 e9eb7fc870e0e5e1e6b00ed99c79d902388a75f140f479d8ebdfa54887716d964feded2c5da7ef30e3ba90ad4648414f422437a50aa52c6efc2a18a3e9df715a
SSDEEP 768:juseoZTj4ih7WU7jBbIdmo2qjAeeXKBoRFR8/nPI6czjbagX3iGIeyonQDuRAISK:jusHZTjR9bM2qeMIFRKA6c3bNXSGIey8
TLSH
T1C0232B103BE8C12BF27F4B7899F261458A7AF2632603D54E1CC4519B5713FC68A52AFE
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
ryuk.e.streamforester.name:80
ryuk.e.streamforester.name:22
ryuk.e.streamforester.name:8080
ryuk.e.streamforester.name:8880
ryuk.e.streamforester.name:2052
ryuk.e.streamforester.name:2082
ryuk.e.streamforester.name:2086
ryuk.e.streamforester.name:2095
ryuk.e.streamforester.name:443
ryuk.e.streamforester.name:2053
ryuk.e.streamforester.name:2083
ryuk.e.streamforester.name:2087
ryuk.e.streamforester.name:2096
ryuk.e.streamforester.name:8443
rat.e.streamforester.name:80
rat.e.streamforester.name:22
rat.e.streamforester.name:8080
rat.e.streamforester.name:8880
rat.e.streamforester.name:2052
rat.e.streamforester.name:2082
rat.e.streamforester.name:2086
rat.e.streamforester.name:2095
rat.e.streamforester.name:443
rat.e.streamforester.name:2053
rat.e.streamforester.name:2083
rat.e.streamforester.name:2087
rat.e.streamforester.name:2096
rat.e.streamforester.name:8443
client.e.streamforester.name:80
client.e.streamforester.name:22
client.e.streamforester.name:8080
client.e.streamforester.name:8880
client.e.streamforester.name:2052
client.e.streamforester.name:2082
client.e.streamforester.name:2086
client.e.streamforester.name:2095
client.e.streamforester.name:443
client.e.streamforester.name:2053
client.e.streamforester.name:2083
client.e.streamforester.name:2087
client.e.streamforester.name:2096
client.e.streamforester.name:8443
darkside.e.streamforester.name:80
darkside.e.streamforester.name:22
darkside.e.streamforester.name:8080
darkside.e.streamforester.name:8880
darkside.e.streamforester.name:2052
darkside.e.streamforester.name:2082
darkside.e.streamforester.name:2086
darkside.e.streamforester.name:2095
darkside.e.streamforester.name:443
darkside.e.streamforester.name:2053
darkside.e.streamforester.name:2083
darkside.e.streamforester.name:2087
darkside.e.streamforester.name:2096
darkside.e.streamforester.name:8443

Mutex

CEfTcu9nx6MO

Attributes

delay
0
install
true
install_file
yl2ot.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/0x000f00000001c5ec-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1284	yl2ot.exe
2540	yl2ot.exe

Outbound SSH connection to public host 2 TTPs 2 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	13	104.26.4.5:22
SSH destination	14	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
5856	cmd.exe
5640	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	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	yl2ot.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yl2ot.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2644	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
2524	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 616 wrote to memory of 5856	616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe	89
PID 616 wrote to memory of 5640	616	8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe	91
PID 5856 wrote to memory of 2524	5856	cmd.exe	93
PID 5640 wrote to memory of 2644	5640	cmd.exe	94
PID 5640 wrote to memory of 2540	5640	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe
"C:\Users\Admin\AppData\Local\Temp\8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:616
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "yl2ot" /tr '"C:\Users\Admin\AppData\Roaming\yl2ot.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5856
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "yl2ot" /tr '"C:\Users\Admin\AppData\Roaming\yl2ot.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2524
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp88AE.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5640
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2644
- - C:\Users\Admin\AppData\Roaming\yl2ot.exe
    "C:\Users\Admin\AppData\Roaming\yl2ot.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2540

C:\Users\Admin\AppData\Roaming\yl2ot.exe
"C:\Users\Admin\AppData\Roaming\yl2ot.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:1284

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

tmp88AE.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp88AE.tmp.bat
Size 149B
SHA256 954ea5656bc6f3f3f05e857f00b017c228f724523baafdcb3cb0c7a4ff75238d
MD5 41a4e1f7468f356e3522bb7b11bea81c
SHA1 381b0b96c6e1691993512ff58fe0491e27a37146
SHA512 171816be514b38b6ed0125facab489fda134cdce504fed5a7b40987818227252705391221d0e32e27503ea495defb84b1a9bfac8391df9331a44599e23ec5e76
TLSH
T18CC02B4251CEEA0F2805646303FAE88D91B26C1D3F44FF80C304495D538084DF0DA381
MD5 SHA1 SHA512 TLSH

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yl2ot.exe

Path C:\Users\Admin\AppData\Roaming\yl2ot.exe
Size 45KB
SHA256 8d88161a88d520e5a133ce802b2b76ea73ea90cdbbff7a4836be70fd1f1a8d31
MD5 d2ce555f2c0c9e37c6da4a4508bab2ca
SHA1 3cba7daa6cf678aa0e748af242c15826eb60d3e1
SHA512 e9eb7fc870e0e5e1e6b00ed99c79d902388a75f140f479d8ebdfa54887716d964feded2c5da7ef30e3ba90ad4648414f422437a50aa52c6efc2a18a3e9df715a
SSDEEP 768:juseoZTj4ih7WU7jBbIdmo2qjAeeXKBoRFR8/nPI6czjbagX3iGIeyonQDuRAISK:jusHZTjR9bM2qeMIFRKA6c3bNXSGIey8
TLSH
T1C0232B103BE8C12BF27F4B7899F261458A7AF2632603D54E1CC4519B5713FC68A52AFE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/616-0-0x0000000074792000-0x0000000074793000-memory.dmp

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memory/616-1-0x00000000006D0000-0x00000000006E2000-memory.dmp

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memory/616-2-0x0000000074780000-0x0000000074F3C000-memory.dmp

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memory/616-3-0x00000000051C0000-0x000000000525C000-memory.dmp

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memory/616-8-0x0000000074780000-0x0000000074F3C000-memory.dmp

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memory/1284-12-0x0000000074610000-0x0000000074DCC000-memory.dmp

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memory/1284-14-0x0000000074610000-0x0000000074DCC000-memory.dmp

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