asyncrat | fc408617a7fab19a6858a66f75240171d809f40a6bc7c12c7314716eeb4c483e

General

Target

Router Scan Brute.exe
Size

1.3MB
MD5

542dc12c0347fe393c73f3f6c3f6421e
SHA1

3b8bc49fea6cc6ed70728025ccf1f3880b5f1ff6
SHA256

fc408617a7fab19a6858a66f75240171d809f40a6bc7c12c7314716eeb4c483e
SHA512

804c20538c695d8702e54c84156c21a4eb10147f5359dcef988c292146993f1687a2ad98c295a22e5f6cbc24fa395b4bd3f1e45ea19c0e7f3a3a6bbcb7567bef
SSDEEP

24576:nywQgeE5O6kTqIgS5N6VilAncnm5gdE6a2139uxOIFfXltm:yIb0X+eN6AlAom5ia2funpl

Score

10^/10

asyncrat stormkitty default credential_access discovery persistence privilege_escalation rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

https://api.telegram.org/bot6967587503:AAElTMa4fhSK1H_lFOYX5WMz7ASRNI1uoec/sendMessage?chat_id=6528052400

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

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

StormKitty payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Brute Scanner Chinese.exe	family_stormkitty
behavioral1/memory/1992-16-0x0000000000920000-0x0000000000952000-memory.dmp	family_stormkitty

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Brute Scanner Chinese.exe	family_asyncrat

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
Executes dropped EXE 2 IoCs

Processes:

RouterScan.exeBrute Scanner Chinese.exe

pid process

2308 RouterScan.exe
1992 Brute Scanner Chinese.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
T1552.001

pid	process
2308	RouterScan.exe
1992	Brute Scanner Chinese.exe

Drops desktop.ini file(s) 6 IoCs

Processes:

Brute Scanner Chinese.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Local\ffa98dd37761f740877b4c4a3717d93e\Admin@MVFYZPLM_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Brute Scanner Chinese.exe
File created	C:\Users\Admin\AppData\Local\ffa98dd37761f740877b4c4a3717d93e\Admin@MVFYZPLM_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	Brute Scanner Chinese.exe
File created	C:\Users\Admin\AppData\Local\ffa98dd37761f740877b4c4a3717d93e\Admin@MVFYZPLM_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Brute Scanner Chinese.exe
File created	C:\Users\Admin\AppData\Local\ffa98dd37761f740877b4c4a3717d93e\Admin@MVFYZPLM_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Brute Scanner Chinese.exe
File opened for modification	C:\Users\Admin\AppData\Local\ffa98dd37761f740877b4c4a3717d93e\Admin@MVFYZPLM_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Brute Scanner Chinese.exe
File created	C:\Users\Admin\AppData\Local\ffa98dd37761f740877b4c4a3717d93e\Admin@MVFYZPLM_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Brute Scanner Chinese.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.

Processes:

flow ioc

4 icanhazip.com
Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.
Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
4	icanhazip.com

Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

Processes:

netsh.exenetsh.exe

description	ioc	process
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 8 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

Processes:

findstr.execmd.exechcp.comnetsh.exeBrute Scanner Chinese.execmd.exechcp.comnetsh.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	findstr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Brute Scanner Chinese.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 2 IoCs
Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.
discovery

Wi-Fi Discovery
T1016.002

Processes:

cmd.exenetsh.exe

pid process

1972 cmd.exe
2024 netsh.exe

pid	process
1972	cmd.exe
2024	netsh.exe

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

Processes:

Brute Scanner Chinese.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	Brute Scanner Chinese.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Brute Scanner Chinese.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

Brute Scanner Chinese.exe

pid	process
1992	Brute Scanner Chinese.exe
1992	Brute Scanner Chinese.exe
1992	Brute Scanner Chinese.exe
1992	Brute Scanner Chinese.exe
1992	Brute Scanner Chinese.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Brute Scanner Chinese.exe

description pid process

Token: SeDebugPrivilege 1992 Brute Scanner Chinese.exe

description	pid	process
Token: SeDebugPrivilege	1992	Brute Scanner Chinese.exe

Suspicious use of WriteProcessMemory 36 IoCs

Processes:

Router Scan Brute.exeBrute Scanner Chinese.execmd.execmd.exe

description	pid	process	target process
PID 1968 wrote to memory of 2308	1968	Router Scan Brute.exe	RouterScan.exe
PID 1968 wrote to memory of 2308	1968	Router Scan Brute.exe	RouterScan.exe
PID 1968 wrote to memory of 2308	1968	Router Scan Brute.exe	RouterScan.exe
PID 1968 wrote to memory of 2308	1968	Router Scan Brute.exe	RouterScan.exe
PID 1968 wrote to memory of 1992	1968	Router Scan Brute.exe	Brute Scanner Chinese.exe
PID 1968 wrote to memory of 1992	1968	Router Scan Brute.exe	Brute Scanner Chinese.exe
PID 1968 wrote to memory of 1992	1968	Router Scan Brute.exe	Brute Scanner Chinese.exe
PID 1968 wrote to memory of 1992	1968	Router Scan Brute.exe	Brute Scanner Chinese.exe
PID 1992 wrote to memory of 1972	1992	Brute Scanner Chinese.exe	cmd.exe
PID 1992 wrote to memory of 1972	1992	Brute Scanner Chinese.exe	cmd.exe
PID 1992 wrote to memory of 1972	1992	Brute Scanner Chinese.exe	cmd.exe
PID 1992 wrote to memory of 1972	1992	Brute Scanner Chinese.exe	cmd.exe
PID 1972 wrote to memory of 2028	1972	cmd.exe	chcp.com
PID 1972 wrote to memory of 2028	1972	cmd.exe	chcp.com
PID 1972 wrote to memory of 2028	1972	cmd.exe	chcp.com
PID 1972 wrote to memory of 2028	1972	cmd.exe	chcp.com
PID 1972 wrote to memory of 2024	1972	cmd.exe	netsh.exe
PID 1972 wrote to memory of 2024	1972	cmd.exe	netsh.exe
PID 1972 wrote to memory of 2024	1972	cmd.exe	netsh.exe
PID 1972 wrote to memory of 2024	1972	cmd.exe	netsh.exe
PID 1972 wrote to memory of 2688	1972	cmd.exe	findstr.exe
PID 1972 wrote to memory of 2688	1972	cmd.exe	findstr.exe
PID 1972 wrote to memory of 2688	1972	cmd.exe	findstr.exe
PID 1972 wrote to memory of 2688	1972	cmd.exe	findstr.exe
PID 1992 wrote to memory of 928	1992	Brute Scanner Chinese.exe	cmd.exe
PID 1992 wrote to memory of 928	1992	Brute Scanner Chinese.exe	cmd.exe
PID 1992 wrote to memory of 928	1992	Brute Scanner Chinese.exe	cmd.exe
PID 1992 wrote to memory of 928	1992	Brute Scanner Chinese.exe	cmd.exe
PID 928 wrote to memory of 2488	928	cmd.exe	chcp.com
PID 928 wrote to memory of 2488	928	cmd.exe	chcp.com
PID 928 wrote to memory of 2488	928	cmd.exe	chcp.com
PID 928 wrote to memory of 2488	928	cmd.exe	chcp.com
PID 928 wrote to memory of 2928	928	cmd.exe	netsh.exe
PID 928 wrote to memory of 2928	928	cmd.exe	netsh.exe
PID 928 wrote to memory of 2928	928	cmd.exe	netsh.exe
PID 928 wrote to memory of 2928	928	cmd.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\Router Scan Brute.exe
"C:\Users\Admin\AppData\Local\Temp\Router Scan Brute.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1968
- C:\Users\Admin\AppData\Local\Temp\RouterScan.exe
  "C:\Users\Admin\AppData\Local\Temp\RouterScan.exe"
  2⤵
  - Executes dropped EXE
  PID:2308
- C:\Users\Admin\AppData\Local\Temp\Brute Scanner Chinese.exe
  "C:\Users\Admin\AppData\Local\Temp\Brute Scanner Chinese.exe"
  2⤵
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1992
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Wi-Fi Discovery
    - Suspicious use of WriteProcessMemory
    PID:1972
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:2028
  - - C:\Windows\SysWOW64\netsh.exe
      netsh wlan show profile
      4⤵
      Event Triggered Execution: Netsh Helper DLL
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Wi-Fi Discovery
      PID:2024
  - - C:\Windows\SysWOW64\findstr.exe
      findstr All
      4⤵
      System Location Discovery: System Language Discovery
      PID:2688
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:928
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:2488
  - - C:\Windows\SysWOW64\netsh.exe
      netsh wlan show networks mode=bssid
      4⤵
      Event Triggered Execution: Netsh Helper DLL
      System Location Discovery: System Language Discovery
      PID:2928

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Browser Information Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Wi-Fi Discovery

1

T1016.002

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\3e95858006cf3c2483e13f5c871a19eb\msgid.dat

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
C:\Users\Admin\AppData\Local\Temp\Brute Scanner Chinese.exe

Filesize
175KB

MD5
4ce2ffb7dcc9334ddf9a8af811dfb44d

SHA1
c71c1be10c58681c8640ba665784a17592af3832

SHA256
ce5905bc0148946b2d0eb0b213bb44fb48618bab27211087808e189c764aefa8

SHA512
b8290d7d25a68a106907fe222499a203b3b54154aa8cafabff41c4622157b564a94ff7c2ab7fee981ae4b718af8ab14756a2356fb1c782e6836daef9b4043b07

Download Submit
C:\Users\Admin\AppData\Local\Temp\RouterScan.exe

Filesize
2.6MB

MD5
11d55e9ac224e91ac6c9db4d108983ff

SHA1
5d5e1f7aba2f29d2c69f7cb93e7d947c913d589c

SHA256
f491c55f026578efd73dd1be987e464ce4579accb77ecd6dc539ff4deaf26c2b

SHA512
8834a5a19b2a68de2f51cfb9f1496a769ecb07d0830b375f3f3b535e627b4ed543def6b03409dd01fad7d584a4f9867a342ee3544d076ca75e61fb10e4f284ce

Download Submit
memory/1968-0-0x000007FEF5E23000-0x000007FEF5E24000-memory.dmp

Filesize
4KB

Download
memory/1968-1-0x0000000000040000-0x0000000000190000-memory.dmp

Filesize
1.3MB

Download
memory/1968-13-0x000007FEF5E20000-0x000007FEF680C000-memory.dmp

Filesize
9.9MB

Download
memory/1968-14-0x000007FEF5E20000-0x000007FEF680C000-memory.dmp

Filesize
9.9MB

Download
memory/1992-15-0x0000000074A1E000-0x0000000074A1F000-memory.dmp

Filesize
4KB

Download
memory/1992-16-0x0000000000920000-0x0000000000952000-memory.dmp

Filesize
200KB

Download
memory/1992-18-0x0000000074A1E000-0x0000000074A1F000-memory.dmp

Filesize
4KB

Download
memory/2308-17-0x0000000000400000-0x00000000006AE000-memory.dmp

Filesize
2.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads