asyncrat | fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e

Analysis

max time kernel
148s
max time network
149s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
07/09/2026, 17:58

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General

Target
fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
Size 45KB
Sample260907-wkdlcasejd
SHA256 fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e
MD5 69117bf13b4d2fb6fd9e804373550419
SHA1 0020578abe440b9ec7df2f2d770baaaffd5c731d
SHA512 2b9b1cba489aef8454124fd33eac8c2c378a6029056539580ecd2b4927a2d20ab109b927cceec87226f80775086446b316d1090d6e486fbebdd65a1daaa6a477
SSDEEP 768:cuR0JTPUYkEWUmjWymo2q1fLiE02FjrdjYkk8PI1MjbfgX3iyQT97QPrBDZUx:cuR0JTPjY2SL9XQB18boXSym97Y9dUx
TLSH
T1B2232A0037E9812BF2BE4F7869F26145467AF6632603D64D1CC451DB5723BC68643AFE
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

phimnunglon.net:80
phimnunglon.net:22
phimnunglon.net:8080
phimnunglon.net:8880
phimnunglon.net:2052
phimnunglon.net:2082
phimnunglon.net:2086
phimnunglon.net:2095
phimnunglon.net:443
phimnunglon.net:2053
phimnunglon.net:2083
phimnunglon.net:2087
phimnunglon.net:2096
phimnunglon.net:8443
www.phimnunglon.net:80
www.phimnunglon.net:22
www.phimnunglon.net:8080
www.phimnunglon.net:8880
www.phimnunglon.net:2052
www.phimnunglon.net:2082
www.phimnunglon.net:2086
www.phimnunglon.net:2095
www.phimnunglon.net:443
www.phimnunglon.net:2053
www.phimnunglon.net:2083
www.phimnunglon.net:2087
www.phimnunglon.net:2096
www.phimnunglon.net:8443
gh0st.phimnunglon.net:80
gh0st.phimnunglon.net:22
gh0st.phimnunglon.net:8080
gh0st.phimnunglon.net:8880
gh0st.phimnunglon.net:2052
gh0st.phimnunglon.net:2082
gh0st.phimnunglon.net:2086
gh0st.phimnunglon.net:2095
gh0st.phimnunglon.net:443
gh0st.phimnunglon.net:2053
gh0st.phimnunglon.net:2083
gh0st.phimnunglon.net:2087
gh0st.phimnunglon.net:2096
gh0st.phimnunglon.net:8443
formbook.phimnunglon.net:80
formbook.phimnunglon.net:22
formbook.phimnunglon.net:8080
formbook.phimnunglon.net:8880
formbook.phimnunglon.net:2052
formbook.phimnunglon.net:2082
formbook.phimnunglon.net:2086
formbook.phimnunglon.net:2095
formbook.phimnunglon.net:443
formbook.phimnunglon.net:2053
formbook.phimnunglon.net:2083
formbook.phimnunglon.net:2087
formbook.phimnunglon.net:2096
formbook.phimnunglon.net:8443

Mutex

64fvfKzHA25f

Attributes

delay
0
install
true
install_file
zr36.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/0x001900000001c50f-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
956	zr36.exe
4440	zr36.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	14	172.67.178.116:22
SSH destination	18	104.21.64.73:22

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
4196	cmd.exe
2796	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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zr36.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zr36.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.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
5356	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
4692	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
Token: SeDebugPrivilege	956	zr36.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1272 wrote to memory of 4196	1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe	90
PID 1272 wrote to memory of 2796	1272	fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe	92
PID 2796 wrote to memory of 5356	2796	cmd.exe	94
PID 4196 wrote to memory of 4692	4196	cmd.exe	95
PID 2796 wrote to memory of 4440	2796	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe
"C:\Users\Admin\AppData\Local\Temp\fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1272
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "zr36" /tr '"C:\Users\Admin\AppData\Roaming\zr36.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4196
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "zr36" /tr '"C:\Users\Admin\AppData\Roaming\zr36.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4692
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp90AD.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2796
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5356
- - C:\Users\Admin\AppData\Roaming\zr36.exe
    "C:\Users\Admin\AppData\Roaming\zr36.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4440

C:\Users\Admin\AppData\Roaming\zr36.exe
"C:\Users\Admin\AppData\Roaming\zr36.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:956

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

Replay Monitor

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Downloads

tmp90AD.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp90AD.tmp.bat
Size 148B
SHA256 fbe073220bb11637a0c049d2045f3351d83959a1d51bb4fdf7375da5fa43525f
MD5 e8d1828ee3e5ec92b334461b77db427d
SHA1 cded2c2cc952bc48f81543359ef4c1d1159ed0d0
SHA512 785518ccff985f43b2cfdd3dc94af54926bf257df6420efe37324fdbe2e6e56ebeb1b604d8fabd2f8a54147f8afbaf484c7adb7d0cfad81f22833b2fc2e5a7c0
TLSH
T181C02B4691C5EA4E2C0A142302FAD88DD1726C693F44BB00D304400D528044CF4D9381
MD5 SHA1 SHA512 TLSH

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zr36.exe

Path C:\Users\Admin\AppData\Roaming\zr36.exe
Size 45KB
SHA256 fa3624b993419dc74489049b50bfd9ad660ebd120cc2fa2ac7b114890260b78e
MD5 69117bf13b4d2fb6fd9e804373550419
SHA1 0020578abe440b9ec7df2f2d770baaaffd5c731d
SHA512 2b9b1cba489aef8454124fd33eac8c2c378a6029056539580ecd2b4927a2d20ab109b927cceec87226f80775086446b316d1090d6e486fbebdd65a1daaa6a477
SSDEEP 768:cuR0JTPUYkEWUmjWymo2q1fLiE02FjrdjYkk8PI1MjbfgX3iyQT97QPrBDZUx:cuR0JTPjY2SL9XQB18boXSym97Y9dUx
TLSH
T1B2232A0037E9812BF2BE4F7869F26145467AF6632603D64D1CC451DB5723BC68643AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/956-12-0x0000000074080000-0x000000007483C000-memory.dmp

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memory/956-14-0x0000000074080000-0x000000007483C000-memory.dmp

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memory/1272-0-0x0000000074202000-0x0000000074203000-memory.dmp

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memory/1272-1-0x0000000000110000-0x0000000000122000-memory.dmp

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memory/1272-2-0x00000000741F0000-0x00000000749AC000-memory.dmp

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memory/1272-3-0x0000000004D90000-0x0000000004E2C000-memory.dmp

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memory/1272-8-0x00000000741F0000-0x00000000749AC000-memory.dmp

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