asyncrat | 04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e

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
10/07/2026, 03:41

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General

Target
04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
Size 45KB
Sample260710-d813facx4p
SHA256 04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e
MD5 0c5a563f383dc57274a9907f549c73b4
SHA1 3d21928f1c68429ba5d7b1548a84bf9c8506220c
SHA512 1cd6af500086e204d22f9fbf2a9fd0ba5c7bee4ba62545a8a2a456512c03429a4b235431f4ee82407a10201531f7cf1043fe09114b4c37415c5d333a2ed6583d
SSDEEP 768:cu6RaepTPYzbs8WU+Xaamo2q1nT9Qpm9PIIzjbqgX3iPL24vIV8KDcHthV0BDZUx:cu6YepTPso2GQI3b9XSiOthsdUx
TLSH
T1DA231A003BE8823BF2BE4FB898F26145867AF5636603D54D2CC451DB1723BC69A426FD
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

phimsexz.org:80
phimsexz.org:22
phimsexz.org:8080
phimsexz.org:8880
phimsexz.org:2052
phimsexz.org:2082
phimsexz.org:2086
phimsexz.org:2095
phimsexz.org:443
phimsexz.org:2053
phimsexz.org:2083
phimsexz.org:2087
phimsexz.org:2096
phimsexz.org:8443
www.phimsexz.org:80
www.phimsexz.org:22
www.phimsexz.org:8080
www.phimsexz.org:8880
www.phimsexz.org:2052
www.phimsexz.org:2082
www.phimsexz.org:2086
www.phimsexz.org:2095
www.phimsexz.org:443
www.phimsexz.org:2053
www.phimsexz.org:2083
www.phimsexz.org:2087
www.phimsexz.org:2096
www.phimsexz.org:8443
malware.phimsexz.org:80
malware.phimsexz.org:22
malware.phimsexz.org:8080
malware.phimsexz.org:8880
malware.phimsexz.org:2052
malware.phimsexz.org:2082
malware.phimsexz.org:2086
malware.phimsexz.org:2095
malware.phimsexz.org:443
malware.phimsexz.org:2053
malware.phimsexz.org:2083
malware.phimsexz.org:2087
malware.phimsexz.org:2096
malware.phimsexz.org:8443
sobig.phimsexz.org:80
sobig.phimsexz.org:22
sobig.phimsexz.org:8080
sobig.phimsexz.org:8880
sobig.phimsexz.org:2052
sobig.phimsexz.org:2082
sobig.phimsexz.org:2086
sobig.phimsexz.org:2095
sobig.phimsexz.org:443
sobig.phimsexz.org:2053
sobig.phimsexz.org:2083
sobig.phimsexz.org:2087
sobig.phimsexz.org:2096
sobig.phimsexz.org:8443
dridex.phimsexz.org:80
dridex.phimsexz.org:22
dridex.phimsexz.org:8080
dridex.phimsexz.org:8880
dridex.phimsexz.org:2052
dridex.phimsexz.org:2082
dridex.phimsexz.org:2086
dridex.phimsexz.org:2095
dridex.phimsexz.org:443
dridex.phimsexz.org:2053
dridex.phimsexz.org:2083
dridex.phimsexz.org:2087
dridex.phimsexz.org:2096
dridex.phimsexz.org:8443
trisis.phimsexz.org:80
trisis.phimsexz.org:22
trisis.phimsexz.org:8080
trisis.phimsexz.org:8880
trisis.phimsexz.org:2052
trisis.phimsexz.org:2082
trisis.phimsexz.org:2086
trisis.phimsexz.org:2095
trisis.phimsexz.org:443
trisis.phimsexz.org:2053
trisis.phimsexz.org:2083
trisis.phimsexz.org:2087
trisis.phimsexz.org:2096
trisis.phimsexz.org:8443

Mutex

eDiEX5uFeYyG

Attributes

delay
0
install
true
install_file
w1ny8kq5.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/0x000f00000001c54b-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
696	w1ny8kq5.exe
2584	w1ny8kq5.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	w1ny8kq5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	w1ny8kq5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.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
3048	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
4632	schtasks.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
Token: SeDebugPrivilege	696	w1ny8kq5.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 6000	2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe	86
PID 2208 wrote to memory of 3568	2208	04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe	87
PID 6000 wrote to memory of 4632	6000	cmd.exe	90
PID 3568 wrote to memory of 3048	3568	cmd.exe	91
PID 3568 wrote to memory of 2584	3568	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe
"C:\Users\Admin\AppData\Local\Temp\04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "w1ny8kq5" /tr '"C:\Users\Admin\AppData\Roaming\w1ny8kq5.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:6000
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "w1ny8kq5" /tr '"C:\Users\Admin\AppData\Roaming\w1ny8kq5.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4632
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7843.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3568
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3048
- - C:\Users\Admin\AppData\Roaming\w1ny8kq5.exe
    "C:\Users\Admin\AppData\Roaming\w1ny8kq5.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2584

C:\Users\Admin\AppData\Roaming\w1ny8kq5.exe
"C:\Users\Admin\AppData\Roaming\w1ny8kq5.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:696

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

tmp7843.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7843.tmp.bat
Size 152B
SHA256 a40250667e23dbea52d6f8ecee3530f4639667dc061b28659932ee8672ced862
MD5 7545e8bf28dccb873b07b30b6e03de81
SHA1 8563ef81bbe97f596d5789e56dd04f67db89435b
SHA512 709fd959d9316f4014cc63b06c855422ffc45f094c6754ab403e5732e6b8b460b72009906b8a677d3b3e6d5fc6b959ada9e9203209f483f64dafcc1b172fcc69
TLSH
T19DC02B4262C9EA0E2905252302FAE58D9172AC1A3F40BB00C304455D228086DF8DD3C1
MD5 SHA1 SHA512 TLSH

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w1ny8kq5.exe

Path C:\Users\Admin\AppData\Roaming\w1ny8kq5.exe
Size 45KB
SHA256 04021b3e7a2add034e0c586afc98fb304d3d3b8e68db62992146a88a9e12436e
MD5 0c5a563f383dc57274a9907f549c73b4
SHA1 3d21928f1c68429ba5d7b1548a84bf9c8506220c
SHA512 1cd6af500086e204d22f9fbf2a9fd0ba5c7bee4ba62545a8a2a456512c03429a4b235431f4ee82407a10201531f7cf1043fe09114b4c37415c5d333a2ed6583d
SSDEEP 768:cu6RaepTPYzbs8WU+Xaamo2q1nT9Qpm9PIIzjbqgX3iPL24vIV8KDcHthV0BDZUx:cu6YepTPso2GQI3b9XSiOthsdUx
TLSH
T1DA231A003BE8823BF2BE4FB898F26145867AF5636603D54D2CC451DB1723BC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/696-12-0x0000000074FE0000-0x000000007579C000-memory.dmp

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memory/696-14-0x0000000074FE0000-0x000000007579C000-memory.dmp

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memory/2208-0-0x00000000751E2000-0x00000000751E3000-memory.dmp

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memory/2208-1-0x0000000000C00000-0x0000000000C12000-memory.dmp

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memory/2208-2-0x00000000751D0000-0x000000007598C000-memory.dmp

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memory/2208-3-0x0000000005640000-0x00000000056DC000-memory.dmp

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memory/2208-8-0x00000000751D0000-0x000000007598C000-memory.dmp

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