asyncrat | 3cdc01d09e12d2e7c72ca0991a56f9aa4c9709ee6b12e4e364ca20667ad86783

Analysis

max time kernel
4s
max time network
0s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
17-08-2024 17:50

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General

Target

AsyncClient.exe
Size

47KB
MD5

a586c51839e644019d5c158cf39238bf
SHA1

273906fe2786f3b5ef465709e77f87f68a7152d6
SHA256

3cdc01d09e12d2e7c72ca0991a56f9aa4c9709ee6b12e4e364ca20667ad86783
SHA512

205cf606dbdc6cb8405480d072d2dafe0cb8db1e5075435e57656da2120a414e1c941f6314308639d66865dbc9559154901b6e10bf34f2214fadc77203ddf741
SSDEEP

768:Mu0OVT0kWNnWUb11lmo2qjsFssCHSruo3yVr0CFPIadzYfMblJU0bK19u9Nq+ckT:Mu0OVT01r2BSD+yiadzDZ1bq9u7YkZEq

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

wome-45459.portmap.host:45459

wome-45459.portmap.host:9999

Mutex

1JewM1Y7Ickf

Attributes

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

aes.plain

Signatures

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

System Location Discovery: System Language Discovery 1 TTPs 1 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	AsyncClient.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2872	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
812	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1892	AsyncClient.exe
1892	AsyncClient.exe
1892	AsyncClient.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1892	AsyncClient.exe

C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1892
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "OperaGXUpdater" /tr '"C:\Users\Admin\AppData\Roaming\OperaGXUpdater.exe"' & exit
  2⤵
  PID:2808
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "OperaGXUpdater" /tr '"C:\Users\Admin\AppData\Roaming\OperaGXUpdater.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:812
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC83F.tmp.bat""
  2⤵
  PID:2936
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2872

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC83F.tmp.bat

Filesize
158B

MD5
b54a69a1a5e952a6aab62ec7f8931de0

SHA1
1ac327c8446aa67acd044ba55b539c70631b04da

SHA256
12d4310297efda4dce19c764c9623b7913cb07194de911d87108f75e93ac28c3

SHA512
dbbcff36199b461ef22b935298c541ce38d0b823f62eca9a34b691b02e6892a6923fa5412de32585f6bdb54f2d05ccdc482b5956c01c23c60891cc1fe3c67012

Download Submit
memory/1892-0-0x00000000742EE000-0x00000000742EF000-memory.dmp

Filesize
4KB

Download
memory/1892-1-0x0000000000020000-0x0000000000032000-memory.dmp

Filesize
72KB

Download
memory/1892-2-0x00000000742E0000-0x00000000749CE000-memory.dmp

Filesize
6.9MB

Download
memory/1892-11-0x00000000742E0000-0x00000000749CE000-memory.dmp

Filesize
6.9MB

Download