asyncrat | 0d20d8d63a5b0c150c16b28454bb7fe222fc8b5f7ad55de88caed109b8c6c679

Analysis

user interaction
yes
max time kernel
60s
max time network
56s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
02/03/2026, 11:39

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General

Target
vdp.uk.exe
Size 45KB
Sample260302-nsj44afs3e
SHA256 0d20d8d63a5b0c150c16b28454bb7fe222fc8b5f7ad55de88caed109b8c6c679
MD5 6667a3b35eb1d5718604c827d3ceb4af
SHA1 17dddb3196a6561b2f0068e9a3c35d2dec18eae1
SHA512 a739ab79fe07d890ecc92e9039c21785be3a11c63eddd933883bc95126578aacd090dd5f8ceff775d8ebde76973a744f6f2212aebc91606cd83c88273b61ca5b
SSDEEP 768:9uiYNTgoHzBWUZd9rmo2qrsc6SWWJtYvyOPIMzjb+gq3if6KAmFAjGnES8lBDZzx:9uiYNTgsr2+5zfp3M3bBqSEmFAyn0rdt
TLSH
T1C4231B0037E8812BF2BE4B789DF26145867AF1673603D64A1CC4519B5713FC69A43AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

vdp.uk.com defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

vdp.uk.com

vdp.uk.com:80
vdp.uk.com:8080
vdp.uk.com:443
vdp.uk.com:8443

Mutex

JCgS5sdCy6Mz

Attributes

delay
3
install
true
install_file
NhinConCacBaMay.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x001a00000002b43b-9.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
5016	NhinConCacBaMay.exe
5000	NhinConCacBaMay.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	NhinConCacBaMay.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vdp.uk.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NhinConCacBaMay.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2196	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
2092	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe
1632	vdp.uk.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1632	vdp.uk.exe
Token: SeDebugPrivilege	5016	NhinConCacBaMay.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1632 wrote to memory of 4796	1632	vdp.uk.exe	82
PID 1632 wrote to memory of 2556	1632	vdp.uk.exe	84
PID 4796 wrote to memory of 2092	4796	cmd.exe	86
PID 2556 wrote to memory of 2196	2556	cmd.exe	87
PID 2556 wrote to memory of 5000	2556	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\vdp.uk.exe
"C:\Users\Admin\AppData\Local\Temp\vdp.uk.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1632
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "NhinConCacBaMay" /tr '"C:\Users\Admin\AppData\Roaming\NhinConCacBaMay.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4796
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "NhinConCacBaMay" /tr '"C:\Users\Admin\AppData\Roaming\NhinConCacBaMay.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2092
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4C37.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2556
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2196
- - C:\Users\Admin\AppData\Roaming\NhinConCacBaMay.exe
    "C:\Users\Admin\AppData\Roaming\NhinConCacBaMay.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5000

C:\Users\Admin\AppData\Roaming\NhinConCacBaMay.exe
"C:\Users\Admin\AppData\Roaming\NhinConCacBaMay.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5016

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

tmp4C37.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4C37.tmp.bat
Size 159B
SHA256 0621a58c9152c722606ac812ec01bfbb50c5a66e44938e2dbfe04a2bdab9ab74
MD5 447b131baf9dc667e14b37187d27b231
SHA1 cdcf6c23b74cbc3b0490ae740e3963b4c82a5479
SHA512 77de203433b307c1b577114381bb6aef38f22ba5f8e9943190dc7ba7fbb46dfd435be530fbf7eb9c0a3715787e6bfb305385017941d5c784b12f7c31034567eb
TLSH
T1F8C02B52A1C5EA5E2A053C1326FFD49CE2776D3A3F40BF10C308408E1280849F4DA3C7
MD5 SHA1 SHA512 TLSH

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NhinConCacBaMay.exe

Path C:\Users\Admin\AppData\Roaming\NhinConCacBaMay.exe
Size 45KB
SHA256 0d20d8d63a5b0c150c16b28454bb7fe222fc8b5f7ad55de88caed109b8c6c679
MD5 6667a3b35eb1d5718604c827d3ceb4af
SHA1 17dddb3196a6561b2f0068e9a3c35d2dec18eae1
SHA512 a739ab79fe07d890ecc92e9039c21785be3a11c63eddd933883bc95126578aacd090dd5f8ceff775d8ebde76973a744f6f2212aebc91606cd83c88273b61ca5b
SSDEEP 768:9uiYNTgoHzBWUZd9rmo2qrsc6SWWJtYvyOPIMzjb+gq3if6KAmFAjGnES8lBDZzx:9uiYNTgsr2+5zfp3M3bBqSEmFAyn0rdt
TLSH
T1C4231B0037E8812BF2BE4B789DF26145867AF1673603D64A1CC4519B5713FC69A43AFE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1632-0-0x0000000000BF0000-0x0000000000C02000-memory.dmp

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memory/1632-1-0x00000000057D0000-0x00000000057E0000-memory.dmp

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memory/1632-2-0x00000000057E0000-0x000000000587C000-memory.dmp

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memory/1632-7-0x0000000001670000-0x000000000174F000-memory.dmp

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memory/2196-11-0x0000000000FC0000-0x000000000107B000-memory.dmp

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memory/5000-15-0x00000000025B0000-0x00000000025BB000-memory.dmp

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memory/5000-14-0x0000000000C10000-0x0000000000CEF000-memory.dmp

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memory/5016-18-0x00000000028D0000-0x00000000028D7000-memory.dmp

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memory/5016-17-0x0000000002890000-0x000000000289B000-memory.dmp

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memory/5016-16-0x0000000000EF0000-0x0000000000FCF000-memory.dmp

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