asyncrat | fd0d9cf1b0714abdff0365a0d0e406cb7204ed272b4101c355698d87c831f6b9

Analysis

max time kernel
61s
max time network
33s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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
behavioral2/memory/2688-1-0x0000000000750000-0x0000000000782000-memory.dmp	family_stormkitty

Stormkitty 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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	PryntVirus.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\fa3df1b47ae9aee81ee7a9709055c065\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	PryntVirus.exe
File created	C:\Users\Admin\AppData\Local\fa3df1b47ae9aee81ee7a9709055c065\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	PryntVirus.exe
File created	C:\Users\Admin\AppData\Local\fa3df1b47ae9aee81ee7a9709055c065\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	PryntVirus.exe
File created	C:\Users\Admin\AppData\Local\fa3df1b47ae9aee81ee7a9709055c065\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	PryntVirus.exe
File opened for modification	C:\Users\Admin\AppData\Local\fa3df1b47ae9aee81ee7a9709055c065\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	PryntVirus.exe
File opened for modification	C:\Users\Admin\AppData\Local\fa3df1b47ae9aee81ee7a9709055c065\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	PryntVirus.exe
File created	C:\Users\Admin\AppData\Local\fa3df1b47ae9aee81ee7a9709055c065\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	PryntVirus.exe
File created	C:\Users\Admin\AppData\Local\fa3df1b47ae9aee81ee7a9709055c065\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Documents\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
14	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	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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	chcp.com
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	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

pid	Process
388	cmd.exe
2900	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
4528	schtasks.exe

Suspicious behavior: EnumeratesProcesses 52 IoCs

pid	Process
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe
2688	PryntVirus.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2688	PryntVirus.exe
Token: SeDebugPrivilege	2688	PryntVirus.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2688 wrote to memory of 388	2688	PryntVirus.exe	88
PID 2688 wrote to memory of 388	2688	PryntVirus.exe	88
PID 2688 wrote to memory of 388	2688	PryntVirus.exe	88
PID 388 wrote to memory of 1392	388	cmd.exe	90
PID 388 wrote to memory of 1392	388	cmd.exe	90
PID 388 wrote to memory of 1392	388	cmd.exe	90
PID 388 wrote to memory of 2900	388	cmd.exe	91
PID 388 wrote to memory of 2900	388	cmd.exe	91
PID 388 wrote to memory of 2900	388	cmd.exe	91
PID 388 wrote to memory of 4000	388	cmd.exe	92
PID 388 wrote to memory of 4000	388	cmd.exe	92
PID 388 wrote to memory of 4000	388	cmd.exe	92
PID 2688 wrote to memory of 4640	2688	PryntVirus.exe	94
PID 2688 wrote to memory of 4640	2688	PryntVirus.exe	94
PID 2688 wrote to memory of 4640	2688	PryntVirus.exe	94
PID 4640 wrote to memory of 3264	4640	cmd.exe	96
PID 4640 wrote to memory of 3264	4640	cmd.exe	96
PID 4640 wrote to memory of 3264	4640	cmd.exe	96
PID 4640 wrote to memory of 3700	4640	cmd.exe	97
PID 4640 wrote to memory of 3700	4640	cmd.exe	97
PID 4640 wrote to memory of 3700	4640	cmd.exe	97
PID 2688 wrote to memory of 4528	2688	PryntVirus.exe	107
PID 2688 wrote to memory of 4528	2688	PryntVirus.exe	107
PID 2688 wrote to memory of 4528	2688	PryntVirus.exe	107

C:\Users\Admin\AppData\Local\Temp\PryntVirus.exe
"C:\Users\Admin\AppData\Local\Temp\PryntVirus.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:2688
- 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:388
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1392
- - 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:2900
- - C:\Windows\SysWOW64\findstr.exe
    findstr All
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4000
- 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:4640
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3264
- - 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:3700
- 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:4528

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\fa3df1b47ae9aee81ee7a9709055c065\Admin@UTKBEBLO_en-US\Browsers\Firefox\Bookmarks.txt

Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\fa3df1b47ae9aee81ee7a9709055c065\Admin@UTKBEBLO_en-US\System\Process.txt

Filesize
4KB

MD5
de4416d40642f60dd4980ee8e729a16b

SHA1
3a9d64a5371f7a6dceb5c991e858a4f2d73d8e4e

SHA256
8da7ce035e34657fc7d948d99fe064761b817f34c7996ea53cd5ca0a5f7fb83b

SHA512
029250a86180eff8b524422d6c5a1ce4ab8859461d0250268b38234a2785111bdb286155b766b3f91a5980cc0a63a9d829d9ef95372d569ae5604a43aa9480f5

Download Submit
C:\Users\Admin\AppData\Local\fa3df1b47ae9aee81ee7a9709055c065\msgid.dat

Filesize
3B

MD5
9c838d2e45b2ad1094d42f4ef36764f6

SHA1
3717862a00f88c6164a735d661d4e9c91c5d9767

SHA256
33512007840ced1bb0aab68f47cb5f702abd494a15f26bcbe26a1e47af03d841

SHA512
069e9945f78abd1ea64129cd762f714fb5aec8a8af1bbc0d2efab6c5960d72e2e0e331e4110d54ec9ec8836bdf5b77ce817f8902c13d3aa48071575e4d4ec79a

Download Submit
memory/2688-145-0x0000000074680000-0x0000000074E30000-memory.dmp

Filesize
7.7MB

Download
memory/2688-4-0x0000000005FC0000-0x0000000006564000-memory.dmp

Filesize
5.6MB

Download
memory/2688-5-0x0000000005AF0000-0x0000000005B82000-memory.dmp

Filesize
584KB

Download
memory/2688-3-0x0000000074680000-0x0000000074E30000-memory.dmp

Filesize
7.7MB

Download
memory/2688-2-0x0000000004FF0000-0x0000000005056000-memory.dmp

Filesize
408KB

Download
memory/2688-0-0x000000007468E000-0x000000007468F000-memory.dmp

Filesize
4KB

Download
memory/2688-148-0x000000007468E000-0x000000007468F000-memory.dmp

Filesize
4KB

Download
memory/2688-151-0x0000000074680000-0x0000000074E30000-memory.dmp

Filesize
7.7MB

Download
memory/2688-152-0x0000000006870000-0x000000000687A000-memory.dmp

Filesize
40KB

Download
memory/2688-153-0x0000000074680000-0x0000000074E30000-memory.dmp

Filesize
7.7MB

Download
memory/2688-1-0x0000000000750000-0x0000000000782000-memory.dmp

Filesize
200KB

Download
memory/2688-159-0x0000000006F60000-0x0000000006F72000-memory.dmp

Filesize
72KB

Download
memory/2688-183-0x0000000007B20000-0x0000000007B2A000-memory.dmp

Filesize
40KB

Download