asyncrat | 9a9a814dc369a5b2318968dbe037d3281dde50b28de210dabf07505077e2c45a

Analysis

max time kernel
145s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
25/07/2024, 01:23

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General

Target
LisectAVT_2403002B_398.exe
Size 4.1MB
Sample240725-brz3pssfld
SHA256 9a9a814dc369a5b2318968dbe037d3281dde50b28de210dabf07505077e2c45a
MD5 015eaec62e39a031067323544f56a5cf
SHA1 f36587ba44c4feec2137aa6768719a1281ed0ba8
SHA512 2da3ff84055021591fc6a7dbcb46a4fbd927aa6ae38da43d8d0620391aef8df3ae0a2edc8305c7720f8e6f0598bd8fe11e8b75b97421eace84365dd405d5de64
SSDEEP 49152:VyO1MDMUZNRz1YgO8jXpF4qQqET6JnxgFxMhx3x3gB++xG:YNRrFoDuwg0G
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

2.0.0

Botnet

Default

webwhatsapp.cc:65503

Mutex

ShiningForceRatMutex_cs_cs_cs

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "\"C:\\Users\\Admin\\.nJLsa8v\\svchost.exe\""	LisectAVT_2403002B_398.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3232 set thread context of 4908	3232	LisectAVT_2403002B_398.exe	86

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	jsc.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
1644	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4908	jsc.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3232 wrote to memory of 2300	3232	LisectAVT_2403002B_398.exe	84
PID 3232 wrote to memory of 2300	3232	LisectAVT_2403002B_398.exe	84
PID 3232 wrote to memory of 4908	3232	LisectAVT_2403002B_398.exe	86
PID 3232 wrote to memory of 4908	3232	LisectAVT_2403002B_398.exe	86
PID 3232 wrote to memory of 4908	3232	LisectAVT_2403002B_398.exe	86
PID 3232 wrote to memory of 4908	3232	LisectAVT_2403002B_398.exe	86
PID 3232 wrote to memory of 4908	3232	LisectAVT_2403002B_398.exe	86
PID 3232 wrote to memory of 4908	3232	LisectAVT_2403002B_398.exe	86
PID 3232 wrote to memory of 4908	3232	LisectAVT_2403002B_398.exe	86
PID 3232 wrote to memory of 4908	3232	LisectAVT_2403002B_398.exe	86
PID 2300 wrote to memory of 1644	2300	cmd.exe	87
PID 2300 wrote to memory of 1644	2300	cmd.exe	87

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\LisectAVT_2403002B_398.exe
"C:\Users\Admin\AppData\Local\Temp\LisectAVT_2403002B_398.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3232
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\.nJLsa8v\svchost.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2300
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\.nJLsa8v\svchost.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1644
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4908