asyncrat | fd0d9cf1b0714abdff0365a0d0e406cb7204ed272b4101c355698d87c831f6b9

Analysis

max time kernel
55s
max time network
24s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
15-01-2025 14:40

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General

Target

PryntVirus.exe
Size

175KB
MD5

94536fed6b981091c2e9e8588e302c79
SHA1

0f7db7625c22ffd146511e4350006a5813948ce6
SHA256

914b43ad3b1faccc2fb2c049875bb0203065912520c6e1b56d3578ed897f759b
SHA512

5c73c861f49c282b8ac5cfc4a5921f77042745fe26e3aca3e34b54c24c6d58b6c895046e52b294d69315719d70eae2775f9895114a0ecec46f7d74a9b13851b6
SSDEEP

3072:U+lBDp+LQ1/fU2RSIIj6hLLYLCYJqvc1DfDTwYhac4IauJX9bj72d6MOINQ+WpW0:FD8u/fdRSIIj6hLLYLCYJqvc1DfXwYho

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/bot7632590974:AAH3TGb_QzmOcupCJLey_TtoLlCaX1M_Kvc/sendMessage?chat_id=7491284773

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

StormKitty payload 1 IoCs

resource	yara_rule
behavioral1/memory/2612-1-0x0000000001090000-0x00000000010C2000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty
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) 6 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\a1ec343d783a702155a23f183c196410\Admin@BCXRJFKE_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	PryntVirus.exe
File opened for modification	C:\Users\Admin\AppData\Local\a1ec343d783a702155a23f183c196410\Admin@BCXRJFKE_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	PryntVirus.exe
File created	C:\Users\Admin\AppData\Local\a1ec343d783a702155a23f183c196410\Admin@BCXRJFKE_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	PryntVirus.exe
File created	C:\Users\Admin\AppData\Local\a1ec343d783a702155a23f183c196410\Admin@BCXRJFKE_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	PryntVirus.exe
File opened for modification	C:\Users\Admin\AppData\Local\a1ec343d783a702155a23f183c196410\Admin@BCXRJFKE_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	PryntVirus.exe
File created	C:\Users\Admin\AppData\Local\a1ec343d783a702155a23f183c196410\Admin@BCXRJFKE_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	PryntVirus.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
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

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PryntVirus.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	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	schtasks.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
700	cmd.exe
3008	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	PryntVirus.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	PryntVirus.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
2388	schtasks.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe
2612	PryntVirus.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2612	PryntVirus.exe
Token: SeDebugPrivilege	2612	PryntVirus.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 2612 wrote to memory of 700	2612	PryntVirus.exe	30
PID 2612 wrote to memory of 700	2612	PryntVirus.exe	30
PID 2612 wrote to memory of 700	2612	PryntVirus.exe	30
PID 2612 wrote to memory of 700	2612	PryntVirus.exe	30
PID 700 wrote to memory of 1800	700	cmd.exe	32
PID 700 wrote to memory of 1800	700	cmd.exe	32
PID 700 wrote to memory of 1800	700	cmd.exe	32
PID 700 wrote to memory of 1800	700	cmd.exe	32
PID 700 wrote to memory of 3008	700	cmd.exe	33
PID 700 wrote to memory of 3008	700	cmd.exe	33
PID 700 wrote to memory of 3008	700	cmd.exe	33
PID 700 wrote to memory of 3008	700	cmd.exe	33
PID 700 wrote to memory of 2184	700	cmd.exe	34
PID 700 wrote to memory of 2184	700	cmd.exe	34
PID 700 wrote to memory of 2184	700	cmd.exe	34
PID 700 wrote to memory of 2184	700	cmd.exe	34
PID 2612 wrote to memory of 2096	2612	PryntVirus.exe	35
PID 2612 wrote to memory of 2096	2612	PryntVirus.exe	35
PID 2612 wrote to memory of 2096	2612	PryntVirus.exe	35
PID 2612 wrote to memory of 2096	2612	PryntVirus.exe	35
PID 2096 wrote to memory of 1656	2096	cmd.exe	37
PID 2096 wrote to memory of 1656	2096	cmd.exe	37
PID 2096 wrote to memory of 1656	2096	cmd.exe	37
PID 2096 wrote to memory of 1656	2096	cmd.exe	37
PID 2096 wrote to memory of 1300	2096	cmd.exe	38
PID 2096 wrote to memory of 1300	2096	cmd.exe	38
PID 2096 wrote to memory of 1300	2096	cmd.exe	38
PID 2096 wrote to memory of 1300	2096	cmd.exe	38
PID 2612 wrote to memory of 2388	2612	PryntVirus.exe	39
PID 2612 wrote to memory of 2388	2612	PryntVirus.exe	39
PID 2612 wrote to memory of 2388	2612	PryntVirus.exe	39
PID 2612 wrote to memory of 2388	2612	PryntVirus.exe	39

C:\Users\Admin\AppData\Local\Temp\PryntVirus.exe
"C:\Users\Admin\AppData\Local\Temp\PryntVirus.exe"
1⤵
- 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:2612
- 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:700
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1800
- - 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:3008
- - C:\Windows\SysWOW64\findstr.exe
    findstr All
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2184
- 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:2096
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1656
- - 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:1300
- 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\PryntVirus.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2388

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\65dbd6a63e7b36454e0e5193291e12ab\msgid.dat

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
C:\Users\Admin\AppData\Local\a1ec343d783a702155a23f183c196410\Admin@BCXRJFKE_en-US\Browsers\Firefox\Bookmarks.txt

Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
memory/2612-0-0x000000007447E000-0x000000007447F000-memory.dmp

Filesize
4KB

Download
memory/2612-1-0x0000000001090000-0x00000000010C2000-memory.dmp

Filesize
200KB

Download
memory/2612-2-0x0000000074470000-0x0000000074B5E000-memory.dmp

Filesize
6.9MB

Download
memory/2612-71-0x0000000074470000-0x0000000074B5E000-memory.dmp

Filesize
6.9MB

Download
memory/2612-75-0x000000007447E000-0x000000007447F000-memory.dmp

Filesize
4KB

Download
memory/2612-76-0x0000000074470000-0x0000000074B5E000-memory.dmp

Filesize
6.9MB

Download
memory/2612-82-0x0000000074470000-0x0000000074B5E000-memory.dmp

Filesize
6.9MB

Download