asyncrat | 3d454f7a59c5b36847a8a92812bb57202bf77b800d9b4aa1d67f9c28614a5afa

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
30/09/2024, 19:05

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General

Target

updater.exe
Size

232KB
MD5

50e5f40aee9ed03617394cda8ecc0f4e
SHA1

f79e10da26389e629c0d52ed2a4ad4755c161a1f
SHA256

3d454f7a59c5b36847a8a92812bb57202bf77b800d9b4aa1d67f9c28614a5afa
SHA512

59988efb8d98297c33d329aa5af1ca8c36a22c68da9bd19b18c16ef75ca2cd2aca02a566e5330f9d6c1f89c466ada25406ad366e2be7447eacfe1324bb226b83
SSDEEP

6144:cDubaBBOBIIj6HLLYLCYJqvc1D6L/qfNNHbgESNLspaGr4ZyHOnxFL:9ba5LmLcEUwYGAyHcb

Score

10^/10

asyncrat stormkitty default discovery persistence privilege_escalation rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Botnet

Default

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

https://api.telegram.org/bot6895317243:AAGYnSkZaitamccrc-RF7hCkwovAyRn5CjQ/sendMessage?chat_id=1787677484

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 1 IoCs

resource	yara_rule
behavioral2/memory/220-1-0x0000000000980000-0x00000000009C0000-memory.dmp	family_stormkitty

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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	updater.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Drops desktop.ini file(s) 8 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\578c922e4f408aa9c60df693cf2b2807\Admin@KZYBFHMK_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	updater.exe
File created	C:\Users\Admin\AppData\Local\578c922e4f408aa9c60df693cf2b2807\Admin@KZYBFHMK_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	updater.exe
File created	C:\Users\Admin\AppData\Local\578c922e4f408aa9c60df693cf2b2807\Admin@KZYBFHMK_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	updater.exe
File created	C:\Users\Admin\AppData\Local\578c922e4f408aa9c60df693cf2b2807\Admin@KZYBFHMK_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	updater.exe
File created	C:\Users\Admin\AppData\Local\578c922e4f408aa9c60df693cf2b2807\Admin@KZYBFHMK_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	updater.exe
File opened for modification	C:\Users\Admin\AppData\Local\578c922e4f408aa9c60df693cf2b2807\Admin@KZYBFHMK_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	updater.exe
File created	C:\Users\Admin\AppData\Local\578c922e4f408aa9c60df693cf2b2807\Admin@KZYBFHMK_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	updater.exe
File opened for modification	C:\Users\Admin\AppData\Local\578c922e4f408aa9c60df693cf2b2807\Admin@KZYBFHMK_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	updater.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
19	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

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

description	ioc	Process
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
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 9 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	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	findstr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	updater.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

pid	Process
3232	cmd.exe
1544	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

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

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3880	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe
220	updater.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	220	updater.exe
Token: SeDebugPrivilege	220	updater.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 220 wrote to memory of 3232	220	updater.exe	83
PID 220 wrote to memory of 3232	220	updater.exe	83
PID 220 wrote to memory of 3232	220	updater.exe	83
PID 3232 wrote to memory of 3844	3232	cmd.exe	85
PID 3232 wrote to memory of 3844	3232	cmd.exe	85
PID 3232 wrote to memory of 3844	3232	cmd.exe	85
PID 3232 wrote to memory of 1544	3232	cmd.exe	86
PID 3232 wrote to memory of 1544	3232	cmd.exe	86
PID 3232 wrote to memory of 1544	3232	cmd.exe	86
PID 3232 wrote to memory of 2632	3232	cmd.exe	87
PID 3232 wrote to memory of 2632	3232	cmd.exe	87
PID 3232 wrote to memory of 2632	3232	cmd.exe	87
PID 220 wrote to memory of 2036	220	updater.exe	90
PID 220 wrote to memory of 2036	220	updater.exe	90
PID 220 wrote to memory of 2036	220	updater.exe	90
PID 2036 wrote to memory of 4728	2036	cmd.exe	92
PID 2036 wrote to memory of 4728	2036	cmd.exe	92
PID 2036 wrote to memory of 4728	2036	cmd.exe	92
PID 2036 wrote to memory of 3180	2036	cmd.exe	93
PID 2036 wrote to memory of 3180	2036	cmd.exe	93
PID 2036 wrote to memory of 3180	2036	cmd.exe	93
PID 220 wrote to memory of 3880	220	updater.exe	98
PID 220 wrote to memory of 3880	220	updater.exe	98
PID 220 wrote to memory of 3880	220	updater.exe	98

C:\Users\Admin\AppData\Local\Temp\updater.exe
"C:\Users\Admin\AppData\Local\Temp\updater.exe"
1⤵
- Checks computer location settings
- 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:220
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Wi-Fi Discovery
  - Suspicious use of WriteProcessMemory
  PID:3232
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3844
- - C:\Windows\SysWOW64\netsh.exe
    netsh wlan show profile
    3⤵
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Wi-Fi Discovery
    PID:1544
- - C:\Windows\SysWOW64\findstr.exe
    findstr All
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2632
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2036
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4728
- - C:\Windows\SysWOW64\netsh.exe
    netsh wlan show networks mode=bssid
    3⤵
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    PID:3180
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /sc ONLOGON /RL HIGHEST /tn "Chrome Update" /tr "C:\Users\Admin\AppData\Local\Temp\updater.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3880

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Wi-Fi Discovery

T1016.002

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\578c922e4f408aa9c60df693cf2b2807\Admin@KZYBFHMK_en-US\Browsers\Firefox\Bookmarks.txt

Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\578c922e4f408aa9c60df693cf2b2807\Admin@KZYBFHMK_en-US\System\Process.txt

Filesize
4KB

MD5
c349425c5b739d8d5e779ada524b0ae8

SHA1
67bc8950bfaca132128337d7c13d35b613f2f147

SHA256
aa7d4cdd7f2c09283c36a126ae451dc16f656e7e136367502c6f0faee865a960

SHA512
cef0956d8eee44ea22653bbccab85781e7959c031bc2a5bc5d561fe1bf3a36f52a5bb337100c9f4b50e1380694af0539938bb417a104cf113847bccd731c9704

Download Submit
C:\Users\Admin\AppData\Local\8a3972323b525bba344ad1d0f9f91669\msgid.dat

Filesize
5B

MD5
fa12a7143c24200577be53e74c33f9f6

SHA1
f3008797d1f6d453427e7915381e285a3e386fde

SHA256
6356587db2a73ec11c68666b201a84e8427d97b50711a407802fbea4f38d145c

SHA512
23f0dcfd2173cdbd7a7b2545c6f80a9b88422d02f6ef332e908c4dafec9df26d5cee9be95fc40a2f64ab3ba1e294595a65a1c2944bfdb55dda9874ac90c58dc6

Download Submit
memory/220-150-0x0000000006A90000-0x0000000006A9A000-memory.dmp

Filesize
40KB

Download
memory/220-4-0x00000000061D0000-0x0000000006774000-memory.dmp

Filesize
5.6MB

Download
memory/220-5-0x0000000005D00000-0x0000000005D92000-memory.dmp

Filesize
584KB

Download
memory/220-3-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/220-145-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/220-0-0x00000000752CE000-0x00000000752CF000-memory.dmp

Filesize
4KB

Download
memory/220-151-0x00000000752CE000-0x00000000752CF000-memory.dmp

Filesize
4KB

Download
memory/220-152-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/220-2-0x00000000053A0000-0x0000000005406000-memory.dmp

Filesize
408KB

Download
memory/220-158-0x0000000007180000-0x0000000007192000-memory.dmp

Filesize
72KB

Download
memory/220-1-0x0000000000980000-0x00000000009C0000-memory.dmp

Filesize
256KB

Download
memory/220-183-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/220-184-0x0000000007D30000-0x0000000007D3A000-memory.dmp

Filesize
40KB

Download