asyncrat | 7e129f68ebb1e8730941dcf50344e256bd0e32f29cac0e641426b88a17e131c6

Analysis

max time kernel
95s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
01/01/2025, 07:56

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General

Target
vfrcxq.ps1
Size 1KB
Sample250101-js67eayqds
SHA256 7e129f68ebb1e8730941dcf50344e256bd0e32f29cac0e641426b88a17e131c6
MD5 0cdc732f0ded614eb23c08213bcf1e04
SHA1 0cbca39b7b1a0ec9b930c38c1c60d50feed74ee3
SHA512 86c92258d18f25c97215c68cd4ef09b0c1433ea9de27c00247537ea8a7c187d4428b1cb151c785d5544f17da8ba9b138ef59efd3c7f7546240bf7ae5a5b29eb7
MD5 SHA1 SHA512

Score

10^/10

asyncrat stormkitty venomrat discovery execution rat stealer

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 1 IoCs

resource	yara_rule
behavioral2/memory/2252-28-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

VenomRAT 1 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral2/memory/2252-28-0x0000000000400000-0x0000000000704000-memory.dmp	VenomRAT

Venomrat family
venomrat

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	1876	powershell.exe

Downloads MZ/PE file
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1876 set thread context of 2252	1876	powershell.exe	87

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1876	powershell.exe

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	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1876	powershell.exe
1876	powershell.exe
1876	powershell.exe
1876	powershell.exe
2252	RegAsm.exe
2252	RegAsm.exe
2252	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1876	powershell.exe
Token: SeDebugPrivilege	2252	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2252	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 1264	1876	powershell.exe	84
PID 1876 wrote to memory of 1264	1876	powershell.exe	84
PID 1264 wrote to memory of 4800	1264	csc.exe	85
PID 1264 wrote to memory of 4800	1264	csc.exe	85
PID 1876 wrote to memory of 3536	1876	powershell.exe	86
PID 1876 wrote to memory of 3536	1876	powershell.exe	86
PID 1876 wrote to memory of 3536	1876	powershell.exe	86
PID 1876 wrote to memory of 2252	1876	powershell.exe	87
PID 1876 wrote to memory of 2252	1876	powershell.exe	87
PID 1876 wrote to memory of 2252	1876	powershell.exe	87
PID 1876 wrote to memory of 2252	1876	powershell.exe	87
PID 1876 wrote to memory of 2252	1876	powershell.exe	87
PID 1876 wrote to memory of 2252	1876	powershell.exe	87
PID 1876 wrote to memory of 2252	1876	powershell.exe	87
PID 1876 wrote to memory of 2252	1876	powershell.exe	87

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\vfrcxq.ps1
1⤵
- Blocklisted process makes network request
- Suspicious use of SetThreadContext
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1876
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\gh5i3ir3\gh5i3ir3.cmdline"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1264
- - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
    C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESA374.tmp" "c:\Users\Admin\AppData\Local\Temp\gh5i3ir3\CSC3DD8B3EFA4A40F8892A9AF437CCC38.TMP"
    3⤵
    PID:4800
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:3536
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2252

Network

MITRE ATT&CK Enterprise v15

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 Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

RESA374.tmp

Path C:\Users\Admin\AppData\Local\Temp\RESA374.tmp
Size 1KB
SHA256 7a6619ec7d85262d800f073475673aab553d34aed140598b13b4cbe69ed85c78
MD5 7256927b8831b77d9f4db7b17a4730d1
SHA1 d7b2b88bb86c448aa4416a3f078b1126f5ac7b25
SHA512 2f64ee145c98ff4cc209964167e199df9dd286da7ed3b725d3e415a81ca10e0da2163a2c6db3b3a201c9d14b61f683e09c6b32f4134f0413f7128fa882bae13d
MD5 SHA1 SHA512

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__PSScriptPolicyTest_bhp2wtz4.r20.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bhp2wtz4.r20.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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gh5i3ir3.dll

Path C:\Users\Admin\AppData\Local\Temp\gh5i3ir3\gh5i3ir3.dll
Size 9KB
SHA256 afc156e77b41809ff67d2a419e1d25e03850513718372a65cb80c18e7d6f8a60
MD5 598a5edd7630b725c1d8716664c6b46f
SHA1 75136b5dfed9df3bcfe4cdcb93aeca98c9f3e15e
SHA512 24f12ccf353fda862bd149ea11b3191aa282f0d9b34aa39318cc06c6f6ba77c2ff3bcb8e04d53229d163a729d01aefd6c72acc09588e448fb130b5e608cfd655
SSDEEP 192:kRH6HN4QhfNQ8q8888yYAdNRjOasUxRa95MqBYxeN45A:vNxNN9OD+a95MqJS5A
MD5 SHA1 SHA512 SSDEEP

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CSC3DD8B3EFA4A40F8892A9AF437CCC38.TMP

Path \??\c:\Users\Admin\AppData\Local\Temp\gh5i3ir3\CSC3DD8B3EFA4A40F8892A9AF437CCC38.TMP
Size 652B
SHA256 532af10f9f0586f6779962254b746f798ea81c224e4eaea63317610dd1667c52
MD5 d8a12afdc00686053ddc97680e637dac
SHA1 9e736044e7030ff0dbf8d2227185fd7777c3847c
SHA512 09ad1e711955d51d5d6c4c5091af139ecdc90a46bfa00c17d5ef01d5122d62d3dbbe5f695107a6f5acfc6a0be655ffd8edeb210fec370c649a5cf572bf7c1bcb
MD5 SHA1 SHA512

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gh5i3ir3.0.cs

Path \??\c:\Users\Admin\AppData\Local\Temp\gh5i3ir3\gh5i3ir3.0.cs
Size 10KB
SHA256 ab42fe5fd08cb87663e130f99f96124fdd37d825d081b9712b0bad8b6f270fac
MD5 b5c3a2d03ff4c721192716f326c77dea
SHA1 6b754fd988ca58865674b711aba76d3c6b2c5693
SHA512 d32e5a98c12b6b85d1913555ea54f837cd0fc647ca945aef9d75ffade06506be1f4a2348827f11c4eeae0796e4156c8f352e3c0f9a6e2cdc93cb501bcdf2c248
SSDEEP 192:2QC2o4mAQgOLocU9wMk2kAt/Z7pu/cuvnzHzrEo6PT:2oYLoH97t/Z7pgjvzf5uT
MD5 SHA1 SHA512 SSDEEP

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gh5i3ir3.cmdline

Path \??\c:\Users\Admin\AppData\Local\Temp\gh5i3ir3\gh5i3ir3.cmdline
Size 204B
SHA256 b9c62d76052ee00e673ad7cbf343a014c8effb16e4b6f304d8de946cb6983777
MD5 ed5d34286b311602428cd9321ec7d7d2
SHA1 015466ee179bbaf7ae44a6b023c4357e3373526a
SHA512 c9ac7f1184b75db905a970f3c18757d199dd649926b1f4bc5ec4d32e1dd5b8644d570a2f29df7a00c25fbb874bdcba69db6081cd041f1b9a25bea579250daaae
MD5 SHA1 SHA512

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memory/1876-13-0x00000284A31F0000-0x00000284A3200000-memory.dmp

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memory/1876-31-0x00007FFAC20B0000-0x00007FFAC2B71000-memory.dmp

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memory/1876-12-0x00007FFAC20B0000-0x00007FFAC2B71000-memory.dmp

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memory/1876-11-0x000002848AD70000-0x000002848AD92000-memory.dmp

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memory/1876-1-0x00007FFAC20B0000-0x00007FFAC2B71000-memory.dmp

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memory/1876-26-0x00000284A3200000-0x00000284A3208000-memory.dmp

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memory/1876-0-0x00007FFAC20B3000-0x00007FFAC20B5000-memory.dmp

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memory/2252-28-0x0000000000400000-0x0000000000704000-memory.dmp

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memory/2252-32-0x0000000005E40000-0x00000000063E4000-memory.dmp

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memory/2252-33-0x0000000005C90000-0x0000000005D22000-memory.dmp

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memory/2252-34-0x0000000005D60000-0x0000000005D6A000-memory.dmp

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memory/2252-37-0x0000000006B00000-0x0000000006B9C000-memory.dmp

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memory/2252-38-0x0000000006BA0000-0x0000000006C06000-memory.dmp

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memory/2252-39-0x0000000006F60000-0x0000000006F82000-memory.dmp

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memory/2252-40-0x0000000006F90000-0x00000000072E4000-memory.dmp

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