asyncrat | 8dba6450d3ff2ac99d519d8f75affdcbb25bf5743e265246e0bfedd60a325a28

Analysis

max time kernel
146s
max time network
139s
platform
windows7_x64
resource
win7-en-20211208
submitted
27/01/2022, 14:51

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
QuotePDF.vbs
Size 444KB
Sample220127-r757naeebl
SHA256 8dba6450d3ff2ac99d519d8f75affdcbb25bf5743e265246e0bfedd60a325a28
MD5 d9f992f8020aa3a3bf5053657ae2b4e1
SHA1 04862f6295b1f63466eac99adbe9f28f678b4aab
SHA512 1f632773295db7dd8a30370a66f29bbcd10485f0483b616ae6e736020d6144cb345e992cd6101da50c70ae078d79de42afd9b1b6e33fd90ced49b0e81207199a
MD5 SHA1 SHA512

Score

10^/10

asyncrat stormkitty rat spyware stealer suricata

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Contains code to disable Windows Defender 6 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral1/files/0x0008000000012284-56.dat	disable_win_def
behavioral1/files/0x0008000000012284-57.dat	disable_win_def
behavioral1/memory/268-60-0x0000000000C20000-0x0000000000C44000-memory.dmp	disable_win_def
behavioral1/memory/592-69-0x0000000000170000-0x0000000000194000-memory.dmp	disable_win_def
behavioral1/files/0x00070000000125df-68.dat	disable_win_def
behavioral1/files/0x00070000000125df-67.dat	disable_win_def

StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty Payload 3 IoCs

resource	yara_rule
behavioral1/files/0x00070000000125ca-58.dat	family_stormkitty
behavioral1/files/0x00070000000125ca-59.dat	family_stormkitty
behavioral1/memory/1276-61-0x0000000000FE0000-0x0000000001010000-memory.dmp	family_stormkitty

suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata

Async RAT payload 9 IoCs

rat

resource	yara_rule
behavioral1/files/0x0008000000012284-56.dat	asyncrat
behavioral1/files/0x0008000000012284-57.dat	asyncrat
behavioral1/files/0x00070000000125ca-58.dat	asyncrat
behavioral1/files/0x00070000000125ca-59.dat	asyncrat
behavioral1/memory/268-60-0x0000000000C20000-0x0000000000C44000-memory.dmp	asyncrat
behavioral1/memory/1276-61-0x0000000000FE0000-0x0000000001010000-memory.dmp	asyncrat
behavioral1/memory/592-69-0x0000000000170000-0x0000000000194000-memory.dmp	asyncrat
behavioral1/files/0x00070000000125df-68.dat	asyncrat
behavioral1/files/0x00070000000125df-67.dat	asyncrat

Executes dropped EXE 3 IoCs

pid	Process
268	file.exe
1276	name.exe
592	word.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Drops desktop.ini file(s) 5 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\d65792383300f784b36841317e7d8e72\Admin@QSKGHMYQ_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	name.exe
File opened for modification	C:\Users\Admin\AppData\Local\d65792383300f784b36841317e7d8e72\Admin@QSKGHMYQ_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	name.exe
File created	C:\Users\Admin\AppData\Local\d65792383300f784b36841317e7d8e72\Admin@QSKGHMYQ_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	name.exe
File created	C:\Users\Admin\AppData\Local\d65792383300f784b36841317e7d8e72\Admin@QSKGHMYQ_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	name.exe
File created	C:\Users\Admin\AppData\Local\d65792383300f784b36841317e7d8e72\Admin@QSKGHMYQ_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	name.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
7	icanhazip.com

Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	name.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	name.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1740	schtasks.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
268	file.exe
268	file.exe
268	file.exe
268	file.exe
268	file.exe
268	file.exe
268	file.exe
268	file.exe
268	file.exe
268	file.exe
268	file.exe
268	file.exe
268	file.exe
1276	name.exe
1276	name.exe
592	word.exe
592	word.exe
592	word.exe
592	word.exe
1276	name.exe
1276	name.exe
592	word.exe
592	word.exe
592	word.exe
592	word.exe
592	word.exe
592	word.exe
1276	name.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1276	name.exe
Token: SeDebugPrivilege	268	file.exe
Token: SeDebugPrivilege	592	word.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 268	1652	WScript.exe	27
PID 1652 wrote to memory of 268	1652	WScript.exe	27
PID 1652 wrote to memory of 268	1652	WScript.exe	27
PID 1652 wrote to memory of 1276	1652	WScript.exe	28
PID 1652 wrote to memory of 1276	1652	WScript.exe	28
PID 1652 wrote to memory of 1276	1652	WScript.exe	28
PID 1652 wrote to memory of 1276	1652	WScript.exe	28
PID 268 wrote to memory of 988	268	file.exe	32
PID 268 wrote to memory of 988	268	file.exe	32
PID 268 wrote to memory of 988	268	file.exe	32
PID 988 wrote to memory of 1740	988	WScript.exe	33
PID 988 wrote to memory of 1740	988	WScript.exe	33
PID 988 wrote to memory of 1740	988	WScript.exe	33
PID 268 wrote to memory of 592	268	file.exe	35
PID 268 wrote to memory of 592	268	file.exe	35
PID 268 wrote to memory of 592	268	file.exe	35
PID 1276 wrote to memory of 1964	1276	name.exe	37
PID 1276 wrote to memory of 1964	1276	name.exe	37
PID 1276 wrote to memory of 1964	1276	name.exe	37
PID 1276 wrote to memory of 1964	1276	name.exe	37
PID 1964 wrote to memory of 1532	1964	cmd.exe	39
PID 1964 wrote to memory of 1532	1964	cmd.exe	39
PID 1964 wrote to memory of 1532	1964	cmd.exe	39
PID 1964 wrote to memory of 1532	1964	cmd.exe	39
PID 1964 wrote to memory of 1968	1964	cmd.exe	40
PID 1964 wrote to memory of 1968	1964	cmd.exe	40
PID 1964 wrote to memory of 1968	1964	cmd.exe	40
PID 1964 wrote to memory of 1968	1964	cmd.exe	40
PID 1964 wrote to memory of 1120	1964	cmd.exe	41
PID 1964 wrote to memory of 1120	1964	cmd.exe	41
PID 1964 wrote to memory of 1120	1964	cmd.exe	41
PID 1964 wrote to memory of 1120	1964	cmd.exe	41
PID 1276 wrote to memory of 1776	1276	name.exe	42
PID 1276 wrote to memory of 1776	1276	name.exe	42
PID 1276 wrote to memory of 1776	1276	name.exe	42
PID 1276 wrote to memory of 1776	1276	name.exe	42
PID 1776 wrote to memory of 988	1776	cmd.exe	44
PID 1776 wrote to memory of 988	1776	cmd.exe	44
PID 1776 wrote to memory of 988	1776	cmd.exe	44
PID 1776 wrote to memory of 988	1776	cmd.exe	44
PID 1776 wrote to memory of 940	1776	cmd.exe	45
PID 1776 wrote to memory of 940	1776	cmd.exe	45
PID 1776 wrote to memory of 940	1776	cmd.exe	45
PID 1776 wrote to memory of 940	1776	cmd.exe	45

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\QuotePDF.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:1652
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:268
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\tmpFE2D.tmp.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:988
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc onlogon /rl highest /tn word.exe /tr "C:\Users\Admin\AppData\Roaming\word.exe
      4⤵
      Creates scheduled task(s)
      PID:1740
- - C:\Users\Admin\AppData\Roaming\word.exe
    "C:\Users\Admin\AppData\Roaming\word.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:592
- C:\Users\Admin\AppData\Local\Temp\name.exe
  "C:\Users\Admin\AppData\Local\Temp\name.exe"
  2⤵
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1276
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1964
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      PID:1532
  - - C:\Windows\SysWOW64\netsh.exe
      netsh wlan show profile
      4⤵
      PID:1968
  - - C:\Windows\SysWOW64\findstr.exe
      findstr All
      4⤵
      PID:1120
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1776
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      PID:988
  - - C:\Windows\SysWOW64\netsh.exe
      netsh wlan show networks mode=bssid
      4⤵
      PID:940

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:1768

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:828

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/268-64-0x0000000000300000-0x0000000000540000-memory.dmp

Download

memory/268-60-0x0000000000C20000-0x0000000000C44000-memory.dmp

Download

memory/592-69-0x0000000000170000-0x0000000000194000-memory.dmp

Download

memory/592-70-0x000000001B060000-0x000000001B062000-memory.dmp

Download

memory/1276-62-0x0000000076641000-0x0000000076643000-memory.dmp

Download

memory/1276-63-0x0000000000350000-0x0000000000351000-memory.dmp

Download

memory/1276-61-0x0000000000FE0000-0x0000000001010000-memory.dmp

Download

memory/1276-71-0x0000000000355000-0x0000000000366000-memory.dmp

Download

memory/1652-55-0x000007FEFC401000-0x000007FEFC403000-memory.dmp

Download