asyncrat | 646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e

Analysis

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

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
16/07/2026, 10:46

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General

Target
646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
Size 45KB
Sample260716-mt2vvsax7n
SHA256 646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e
MD5 ca7e57b422039bfa01fb1148f3dfc846
SHA1 b4ff29de32b01678b4b956568660f8a133c171e9
SHA512 729ec98db613b9c526f083a96faf90eced10e2e30e9eb76689870de549d6a4a59a706257e2a47acdcc5e88da5117b9c0699532a5e232bc7732e916cb8acf87e3
SSDEEP 768:0u1YJTHwAUgQWUaT2Wmo2q9sZo3TMtPIQ2jbhgX3iTCXn+dc9EhBDZ8x:0u1YJTHcw2dU3Q6bOXS2n+dc0d8x
TLSH
T14E232C0037E8822BF1BE4F78A8F26145867AF2673603D58D1CC451DB5623FC6DA426F9
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

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

Mutex

MxWZXsKGUQva

Attributes

delay
0
install
true
install_file
fydp8b.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/0x000e00000001c583-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
5664	fydp8b.exe
6008	fydp8b.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	fydp8b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fydp8b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1744	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
5876	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
Token: SeDebugPrivilege	5664	fydp8b.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 5076	2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe	87
PID 2900 wrote to memory of 3108	2900	646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe	89
PID 5076 wrote to memory of 5876	5076	cmd.exe	91
PID 3108 wrote to memory of 1744	3108	cmd.exe	92
PID 3108 wrote to memory of 6008	3108	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe
"C:\Users\Admin\AppData\Local\Temp\646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2900
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "fydp8b" /tr '"C:\Users\Admin\AppData\Roaming\fydp8b.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5076
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "fydp8b" /tr '"C:\Users\Admin\AppData\Roaming\fydp8b.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5876
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5375.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3108
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1744
- - C:\Users\Admin\AppData\Roaming\fydp8b.exe
    "C:\Users\Admin\AppData\Roaming\fydp8b.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:6008

C:\Users\Admin\AppData\Roaming\fydp8b.exe
"C:\Users\Admin\AppData\Roaming\fydp8b.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5664

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

tmp5375.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5375.tmp.bat
Size 150B
SHA256 0a3ada7c9a9e072e5a5b230dad367eb10279d6b2b7b591bdb954360ddf4bf45b
MD5 940fa88ae5f91d202c86c6a277a08d72
SHA1 04444ec67d679215e036278fff378488f4bbcc6a
SHA512 e42c82c6a71ca072be4f05723bf82e3fe5d4fd5d47ce2c4d69a9369a038bebc6e39faced97846ae4d3c5878d521f23184ab1473c7e1e1b647a5b951385b0beb0
TLSH
T1FDC08C4295C6EA0EA809581302BAAA8C91626DAA3E80AB20CB04446E6280488E09A281
MD5 SHA1 SHA512 TLSH

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fydp8b.exe

Path C:\Users\Admin\AppData\Roaming\fydp8b.exe
Size 45KB
SHA256 646c665e3960ed8a1c2bf3e9726cd2b2a79b9d7ca65915a757f197335f34589e
MD5 ca7e57b422039bfa01fb1148f3dfc846
SHA1 b4ff29de32b01678b4b956568660f8a133c171e9
SHA512 729ec98db613b9c526f083a96faf90eced10e2e30e9eb76689870de549d6a4a59a706257e2a47acdcc5e88da5117b9c0699532a5e232bc7732e916cb8acf87e3
SSDEEP 768:0u1YJTHwAUgQWUaT2Wmo2q9sZo3TMtPIQ2jbhgX3iTCXn+dc9EhBDZ8x:0u1YJTHcw2dU3Q6bOXS2n+dc0d8x
TLSH
T14E232C0037E8822BF1BE4F78A8F26145867AF2673603D58D1CC451DB5623FC6DA426F9
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2900-0-0x0000000074B92000-0x0000000074B93000-memory.dmp

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memory/2900-1-0x0000000000A90000-0x0000000000AA2000-memory.dmp

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memory/2900-2-0x0000000074B80000-0x000000007533C000-memory.dmp

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memory/2900-3-0x0000000005610000-0x00000000056AC000-memory.dmp

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memory/2900-9-0x0000000074B80000-0x000000007533C000-memory.dmp

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memory/5664-12-0x0000000074B80000-0x000000007533C000-memory.dmp

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memory/5664-14-0x0000000074B80000-0x000000007533C000-memory.dmp

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