asyncrat | 7e129f68ebb1e8730941dcf50344e256bd0e32f29cac0e641426b88a17e131c6

General

Target

vfrcxq.ps1
Size

1KB
MD5

0cdc732f0ded614eb23c08213bcf1e04
SHA1

0cbca39b7b1a0ec9b930c38c1c60d50feed74ee3
SHA256

7e129f68ebb1e8730941dcf50344e256bd0e32f29cac0e641426b88a17e131c6
SHA512

86c92258d18f25c97215c68cd4ef09b0c1433ea9de27c00247537ea8a7c187d4428b1cb151c785d5544f17da8ba9b138ef59efd3c7f7546240bf7ae5a5b29eb7

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

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\RESA374.tmp

Filesize
1KB

MD5
7256927b8831b77d9f4db7b17a4730d1

SHA1
d7b2b88bb86c448aa4416a3f078b1126f5ac7b25

SHA256
7a6619ec7d85262d800f073475673aab553d34aed140598b13b4cbe69ed85c78

SHA512
2f64ee145c98ff4cc209964167e199df9dd286da7ed3b725d3e415a81ca10e0da2163a2c6db3b3a201c9d14b61f683e09c6b32f4134f0413f7128fa882bae13d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bhp2wtz4.r20.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\gh5i3ir3\gh5i3ir3.dll

Filesize
9KB

MD5
598a5edd7630b725c1d8716664c6b46f

SHA1
75136b5dfed9df3bcfe4cdcb93aeca98c9f3e15e

SHA256
afc156e77b41809ff67d2a419e1d25e03850513718372a65cb80c18e7d6f8a60

SHA512
24f12ccf353fda862bd149ea11b3191aa282f0d9b34aa39318cc06c6f6ba77c2ff3bcb8e04d53229d163a729d01aefd6c72acc09588e448fb130b5e608cfd655

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\gh5i3ir3\CSC3DD8B3EFA4A40F8892A9AF437CCC38.TMP

Filesize
652B

MD5
d8a12afdc00686053ddc97680e637dac

SHA1
9e736044e7030ff0dbf8d2227185fd7777c3847c

SHA256
532af10f9f0586f6779962254b746f798ea81c224e4eaea63317610dd1667c52

SHA512
09ad1e711955d51d5d6c4c5091af139ecdc90a46bfa00c17d5ef01d5122d62d3dbbe5f695107a6f5acfc6a0be655ffd8edeb210fec370c649a5cf572bf7c1bcb

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\gh5i3ir3\gh5i3ir3.0.cs

Filesize
10KB

MD5
b5c3a2d03ff4c721192716f326c77dea

SHA1
6b754fd988ca58865674b711aba76d3c6b2c5693

SHA256
ab42fe5fd08cb87663e130f99f96124fdd37d825d081b9712b0bad8b6f270fac

SHA512
d32e5a98c12b6b85d1913555ea54f837cd0fc647ca945aef9d75ffade06506be1f4a2348827f11c4eeae0796e4156c8f352e3c0f9a6e2cdc93cb501bcdf2c248

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\gh5i3ir3\gh5i3ir3.cmdline

Filesize
204B

MD5
ed5d34286b311602428cd9321ec7d7d2

SHA1
015466ee179bbaf7ae44a6b023c4357e3373526a

SHA256
b9c62d76052ee00e673ad7cbf343a014c8effb16e4b6f304d8de946cb6983777

SHA512
c9ac7f1184b75db905a970f3c18757d199dd649926b1f4bc5ec4d32e1dd5b8644d570a2f29df7a00c25fbb874bdcba69db6081cd041f1b9a25bea579250daaae

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

Filesize
64KB

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

Filesize
10.8MB

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

Filesize
10.8MB

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

Filesize
136KB

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

Filesize
10.8MB

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

Filesize
32KB

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

Filesize
8KB

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

Filesize
3.0MB

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

Filesize
5.6MB

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

Filesize
584KB

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

Filesize
40KB

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

Filesize
624KB

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

Filesize
408KB

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

Filesize
136KB

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

Filesize
3.3MB

Download

Analysis

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