asyncrat | a1ddae9574bbeadd40b789fc8c7719b47c0d4bd8ed93abbd1d07f7e866ac40a6

Analysis

max time kernel
145s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 06:14

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General

Target

998566d8ea82f0a3c8f337e42a95f373.exe
Size

45KB
MD5

998566d8ea82f0a3c8f337e42a95f373
SHA1

e61b997562fadf8c805bf9d66b194db9fac2e958
SHA256

c19fa552e9898ac3a969fccbd5225b286393e4d4ef0343df96794e0a633ba1c5
SHA512

b7bdf4a03674899c02999a9a0f9f1fae67d97c0646d37fed97ae770d4ee1240a39f0388ff8dc6eac760bde12d6e291f5371c075ce49728fcf84e2edaddec6407
SSDEEP

768:wuYqlTLoczGWUgP28mo2qMAKjPGaG6PIyzjbFgX3irduljz5WpcBDZ7B:wuYqlTLbj2AKTkDy3bCXSrqz0p6d7B

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:8000

Mutex

ddsO1QLOdEGK

Attributes

delay
3
install
true
install_file
Windows745635.exe
install_folder
%Temp%

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
behavioral20/files/0x00080000000242b8-13.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Control Panel\International\Geo\Nation	998566d8ea82f0a3c8f337e42a95f373.exe

Executes dropped EXE 1 IoCs

pid	Process
4400	Windows745635.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 6 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	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	Windows745635.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	998566d8ea82f0a3c8f337e42a95f373.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4840	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
4852	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe
4516	998566d8ea82f0a3c8f337e42a95f373.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4516	998566d8ea82f0a3c8f337e42a95f373.exe
Token: SeDebugPrivilege	4400	Windows745635.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4516 wrote to memory of 5012	4516	998566d8ea82f0a3c8f337e42a95f373.exe	93
PID 4516 wrote to memory of 5012	4516	998566d8ea82f0a3c8f337e42a95f373.exe	93
PID 4516 wrote to memory of 5012	4516	998566d8ea82f0a3c8f337e42a95f373.exe	93
PID 4516 wrote to memory of 5672	4516	998566d8ea82f0a3c8f337e42a95f373.exe	95
PID 4516 wrote to memory of 5672	4516	998566d8ea82f0a3c8f337e42a95f373.exe	95
PID 4516 wrote to memory of 5672	4516	998566d8ea82f0a3c8f337e42a95f373.exe	95
PID 5012 wrote to memory of 4852	5012	cmd.exe	97
PID 5012 wrote to memory of 4852	5012	cmd.exe	97
PID 5012 wrote to memory of 4852	5012	cmd.exe	97
PID 5672 wrote to memory of 4840	5672	cmd.exe	98
PID 5672 wrote to memory of 4840	5672	cmd.exe	98
PID 5672 wrote to memory of 4840	5672	cmd.exe	98
PID 5672 wrote to memory of 4400	5672	cmd.exe	100
PID 5672 wrote to memory of 4400	5672	cmd.exe	100
PID 5672 wrote to memory of 4400	5672	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\998566d8ea82f0a3c8f337e42a95f373.exe
"C:\Users\Admin\AppData\Local\Temp\998566d8ea82f0a3c8f337e42a95f373.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4516
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows745635" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows745635.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5012
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Windows745635" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows745635.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4852
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp952B.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5672
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4840
- - C:\Users\Admin\AppData\Local\Temp\Windows745635.exe
    "C:\Users\Admin\AppData\Local\Temp\Windows745635.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4400

Network

MITRE ATT&CK Enterprise v15

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

Query Registry

T1012

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

C:\Users\Admin\AppData\Local\Temp\Windows745635.exe

Filesize
45KB

MD5
998566d8ea82f0a3c8f337e42a95f373

SHA1
e61b997562fadf8c805bf9d66b194db9fac2e958

SHA256
c19fa552e9898ac3a969fccbd5225b286393e4d4ef0343df96794e0a633ba1c5

SHA512
b7bdf4a03674899c02999a9a0f9f1fae67d97c0646d37fed97ae770d4ee1240a39f0388ff8dc6eac760bde12d6e291f5371c075ce49728fcf84e2edaddec6407

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp952B.tmp.bat

Filesize
160B

MD5
60f2135f0634b142f937c4de651833aa

SHA1
f84fe480af8fb9d979a7768a3a52e54f096ac507

SHA256
c03cf5a4c7f1679ff350d497eed31d5b5140e44c7da66d4ebb5298a560cdee77

SHA512
f3fe3cf3cf23dc3eef19537e26a89017b01c14a470b01aa0ad307851f8026fbaa4651f4f44fe38b4fe61c9c1dc5023b8aca5ffec5cafe3d2339dd47900e5efc6

Download Submit
memory/4400-14-0x0000000074DD0000-0x0000000075580000-memory.dmp

Filesize
7.7MB

Download
memory/4400-15-0x0000000074DD0000-0x0000000075580000-memory.dmp

Filesize
7.7MB

Download
memory/4516-0-0x0000000074DDE000-0x0000000074DDF000-memory.dmp

Filesize
4KB

Download
memory/4516-1-0x00000000000E0000-0x00000000000F2000-memory.dmp

Filesize
72KB

Download
memory/4516-2-0x0000000074DD0000-0x0000000075580000-memory.dmp

Filesize
7.7MB

Download
memory/4516-3-0x0000000004A80000-0x0000000004AE6000-memory.dmp

Filesize
408KB

Download
memory/4516-4-0x0000000004F00000-0x0000000004F9C000-memory.dmp

Filesize
624KB

Download
memory/4516-10-0x0000000074DD0000-0x0000000075580000-memory.dmp

Filesize
7.7MB

Download