asyncrat | 88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b

Analysis

max time kernel
7s
max time network
155s
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, 10:44

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General

Target
88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
Size 45KB
Sample260816-ms17yahn61
SHA256 88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b
MD5 6b1135b753d9a97d35ecb4c2029d6fab
SHA1 db96216330b52f2dc24a6cf48d0e2cad3a012ae8
SHA512 94380f335ec83b0cf563e8e4c51f6de74bc02f0eb566bb1a008f9a61db763bdb24a2476d149fc6e9dbf8c308580173e333f6f5248f14e46ac04dfe37077d92c2
SSDEEP 768:EulCJTHESwgWUK3aGmo2q9TZo3TMtPIQ+jb5gX3iJ8aZyHQ1d2w4u8BDZsx:EulCJTHl42sU3QybWXSxsHXdsx
TLSH
T135232A003BD8812BF2BE4F78A9F25245867AF6673A03D54E1CC4419B5623FC5CA526FE
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

streamforester.name:80
streamforester.name:22
streamforester.name:8080
streamforester.name:8880
streamforester.name:2052
streamforester.name:2082
streamforester.name:2086
streamforester.name:2095
streamforester.name:443
streamforester.name:2053
streamforester.name:2083
streamforester.name:2087
streamforester.name:2096
streamforester.name:8443
www.streamforester.name:80
www.streamforester.name:22
www.streamforester.name:8080
www.streamforester.name:8880
www.streamforester.name:2052
www.streamforester.name:2082
www.streamforester.name:2086
www.streamforester.name:2095
www.streamforester.name:443
www.streamforester.name:2053
www.streamforester.name:2083
www.streamforester.name:2087
www.streamforester.name:2096
www.streamforester.name:8443
notpetya.streamforester.name:80
notpetya.streamforester.name:22
notpetya.streamforester.name:8080
notpetya.streamforester.name:8880
notpetya.streamforester.name:2052
notpetya.streamforester.name:2082
notpetya.streamforester.name:2086
notpetya.streamforester.name:2095
notpetya.streamforester.name:443
notpetya.streamforester.name:2053
notpetya.streamforester.name:2083
notpetya.streamforester.name:2087
notpetya.streamforester.name:2096
notpetya.streamforester.name:8443
darkside.streamforester.name:80
darkside.streamforester.name:22
darkside.streamforester.name:8080
darkside.streamforester.name:8880
darkside.streamforester.name:2052
darkside.streamforester.name:2082
darkside.streamforester.name:2086
darkside.streamforester.name:2095
darkside.streamforester.name:443
darkside.streamforester.name:2053
darkside.streamforester.name:2083
darkside.streamforester.name:2087
darkside.streamforester.name:2096
darkside.streamforester.name:8443

Mutex

M0EmRpFprzxs

Attributes

delay
0
install
true
install_file
h5bt4b.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/0x000d00000001c5a1-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
5976	h5bt4b.exe
4592	h5bt4b.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
4516	cmd.exe
3868	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	h5bt4b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	h5bt4b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1268	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
6028	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1820 wrote to memory of 4516	1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe	89
PID 1820 wrote to memory of 3868	1820	88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe	91
PID 4516 wrote to memory of 6028	4516	cmd.exe	93
PID 3868 wrote to memory of 1268	3868	cmd.exe	94
PID 3868 wrote to memory of 4592	3868	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe
"C:\Users\Admin\AppData\Local\Temp\88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1820
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "h5bt4b" /tr '"C:\Users\Admin\AppData\Roaming\h5bt4b.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4516
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "h5bt4b" /tr '"C:\Users\Admin\AppData\Roaming\h5bt4b.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:6028
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp745B.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3868
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1268
- - C:\Users\Admin\AppData\Roaming\h5bt4b.exe
    "C:\Users\Admin\AppData\Roaming\h5bt4b.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4592

C:\Users\Admin\AppData\Roaming\h5bt4b.exe
"C:\Users\Admin\AppData\Roaming\h5bt4b.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:5976

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:776

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

tmp745B.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp745B.tmp.bat
Size 150B
SHA256 c42c87a6b27b5d8988c2d068380aacb9e6f46b43b4d224b8b24e737e0892787e
MD5 145fd16fce33522fc762d351c218fa8a
SHA1 0e464aa5371ebd22610253f66650760624ce3afd
SHA512 76987c9a0209b0e2478bed81eef278b1f28a6426c432af2ad96b2df2a18ae8509e7d4c6df90b07e3e7942e081f01f2f48a7b72e22331cd3d58813bbdd3737a85
TLSH
T1E8C02B436EC5EA0E2A06645302FAD49C91766C593F44FF10D784840D9280489F4DE345
MD5 SHA1 SHA512 TLSH

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h5bt4b.exe

Path C:\Users\Admin\AppData\Roaming\h5bt4b.exe
Size 45KB
SHA256 88524cf13f1217df4366ede6609dc2179fb198f04fdbbacef736abd97a054f6b
MD5 6b1135b753d9a97d35ecb4c2029d6fab
SHA1 db96216330b52f2dc24a6cf48d0e2cad3a012ae8
SHA512 94380f335ec83b0cf563e8e4c51f6de74bc02f0eb566bb1a008f9a61db763bdb24a2476d149fc6e9dbf8c308580173e333f6f5248f14e46ac04dfe37077d92c2
SSDEEP 768:EulCJTHESwgWUK3aGmo2q9TZo3TMtPIQ+jb5gX3iJ8aZyHQ1d2w4u8BDZsx:EulCJTHl42sU3QybWXSxsHXdsx
TLSH
T135232A003BD8812BF2BE4F78A9F25245867AF6673A03D54E1CC4419B5623FC5CA526FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1820-0-0x0000000074CE2000-0x0000000074CE3000-memory.dmp

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memory/1820-1-0x0000000000910000-0x0000000000922000-memory.dmp

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memory/1820-2-0x0000000074CD0000-0x000000007548C000-memory.dmp

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memory/1820-3-0x0000000005480000-0x000000000551C000-memory.dmp

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memory/1820-8-0x0000000074CD0000-0x000000007548C000-memory.dmp

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memory/5976-12-0x0000000074B70000-0x000000007532C000-memory.dmp

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memory/5976-14-0x0000000074B70000-0x000000007532C000-memory.dmp

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