asyncrat | f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03

Analysis

max time kernel
148s
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
10/07/2026, 14:29

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General

Target
f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
Size 45KB
Sample260710-rtnepadt8y
SHA256 f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03
MD5 243999d1bd5b57ac77e1dbe85f3edfca
SHA1 304bf22d5049d26cf84bcf9ac72c55d5cc55ec42
SHA512 17e2447a05500dceb793a5f7bb96a6ab60d335f95a183c1783ee542cf7fb0c939fb5cf42de606dd11622d653ac7e6f152bf38c37cfb96938794c1437887f0e63
SSDEEP 768:5udApTNctooWUS7C+mo2qtgDEbHBqjSOPI/Xzzjb4gX3i6lVRS349rpLaBDZ0x:5udApTNmU2fyoO3/Xz3bvXS6lGKVLEd2
TLSH
T1EA231A003BE8812BF2BE4F78A9F26145467AF6673603D54D1CC452DB5623FC68A42AFD
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

phimxxxhd.com:80
phimxxxhd.com:22
phimxxxhd.com:8080
phimxxxhd.com:8880
phimxxxhd.com:2052
phimxxxhd.com:2082
phimxxxhd.com:2086
phimxxxhd.com:2095
phimxxxhd.com:443
phimxxxhd.com:2053
phimxxxhd.com:2083
phimxxxhd.com:2087
phimxxxhd.com:2096
phimxxxhd.com:8443
www.phimxxxhd.com:80
www.phimxxxhd.com:22
www.phimxxxhd.com:8080
www.phimxxxhd.com:8880
www.phimxxxhd.com:2052
www.phimxxxhd.com:2082
www.phimxxxhd.com:2086
www.phimxxxhd.com:2095
www.phimxxxhd.com:443
www.phimxxxhd.com:2053
www.phimxxxhd.com:2083
www.phimxxxhd.com:2087
www.phimxxxhd.com:2096
www.phimxxxhd.com:8443
conti.phimxxxhd.com:80
conti.phimxxxhd.com:22
conti.phimxxxhd.com:8080
conti.phimxxxhd.com:8880
conti.phimxxxhd.com:2052
conti.phimxxxhd.com:2082
conti.phimxxxhd.com:2086
conti.phimxxxhd.com:2095
conti.phimxxxhd.com:443
conti.phimxxxhd.com:2053
conti.phimxxxhd.com:2083
conti.phimxxxhd.com:2087
conti.phimxxxhd.com:2096
conti.phimxxxhd.com:8443
hack.phimxxxhd.com:80
hack.phimxxxhd.com:22
hack.phimxxxhd.com:8080
hack.phimxxxhd.com:8880
hack.phimxxxhd.com:2052
hack.phimxxxhd.com:2082
hack.phimxxxhd.com:2086
hack.phimxxxhd.com:2095
hack.phimxxxhd.com:443
hack.phimxxxhd.com:2053
hack.phimxxxhd.com:2083
hack.phimxxxhd.com:2087
hack.phimxxxhd.com:2096
hack.phimxxxhd.com:8443

Mutex

GUeNWkyTGQyt

Attributes

delay
0
install
true
install_file
wmexlw.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/0x000e00000001c52a-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
4020	wmexlw.exe
6068	wmexlw.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmexlw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmexlw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5020	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
5824	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
Token: SeDebugPrivilege	4020	wmexlw.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4140 wrote to memory of 3888	4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe	87
PID 4140 wrote to memory of 6092	4140	f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe	88
PID 3888 wrote to memory of 5824	3888	cmd.exe	91
PID 6092 wrote to memory of 5020	6092	cmd.exe	92
PID 6092 wrote to memory of 6068	6092	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe
"C:\Users\Admin\AppData\Local\Temp\f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4140
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "wmexlw" /tr '"C:\Users\Admin\AppData\Roaming\wmexlw.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3888
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "wmexlw" /tr '"C:\Users\Admin\AppData\Roaming\wmexlw.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5824
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp19E7.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:6092
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5020
- - C:\Users\Admin\AppData\Roaming\wmexlw.exe
    "C:\Users\Admin\AppData\Roaming\wmexlw.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:6068

C:\Users\Admin\AppData\Roaming\wmexlw.exe
"C:\Users\Admin\AppData\Roaming\wmexlw.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4020

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

tmp19E7.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp19E7.tmp.bat
Size 150B
SHA256 18bdef579ed0683af4119f256456323a497068a628ed1336aa49c3b801cbc0a6
MD5 1fdc607c382b68a334b54428af6c85b7
SHA1 8062a74a44dcd6f2d770370ae3446fb173e4d71f
SHA512 e4cdee5944c839bf6d62ab6101d3ffc7dd2b1bdf628cb45d1840ac6a76f859de6a79b4f962420b8c4b487619db22b96d88d68e3fa03e520c45b0d335e71fedc5
TLSH
T1A9C02B5361C5EB4F280D541312FADD8CE172EC693F80BB50C704440D3280448F0DE386
MD5 SHA1 SHA512 TLSH

Submit Download

wmexlw.exe

Path C:\Users\Admin\AppData\Roaming\wmexlw.exe
Size 45KB
SHA256 f8b45633940197704f5a21ce40e004d2472b24431e17eea697d40b085f5e6c03
MD5 243999d1bd5b57ac77e1dbe85f3edfca
SHA1 304bf22d5049d26cf84bcf9ac72c55d5cc55ec42
SHA512 17e2447a05500dceb793a5f7bb96a6ab60d335f95a183c1783ee542cf7fb0c939fb5cf42de606dd11622d653ac7e6f152bf38c37cfb96938794c1437887f0e63
SSDEEP 768:5udApTNctooWUS7C+mo2qtgDEbHBqjSOPI/Xzzjb4gX3i6lVRS349rpLaBDZ0x:5udApTNmU2fyoO3/Xz3bvXS6lGKVLEd2
TLSH
T1EA231A003BE8812BF2BE4F78A9F26145467AF6673603D54D1CC452DB5623FC68A42AFD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4020-12-0x0000000074520000-0x0000000074CDC000-memory.dmp

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memory/4020-14-0x0000000074520000-0x0000000074CDC000-memory.dmp

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memory/4140-0-0x00000000746C2000-0x00000000746C3000-memory.dmp

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memory/4140-1-0x0000000000A80000-0x0000000000A92000-memory.dmp

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memory/4140-2-0x00000000746B0000-0x0000000074E6C000-memory.dmp

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memory/4140-3-0x0000000005620000-0x00000000056BC000-memory.dmp

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memory/4140-8-0x00000000746B0000-0x0000000074E6C000-memory.dmp

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