asyncrat | 4496b644a6644204c1e18432442c322bb0f1b12673448b0fee278e8fe91eddc2

General

Target

Server.exe
Size

175KB
MD5

ca7724297f98a1e1fcde9cd5c9df533d
SHA1

7990ac651a003a2b41ded91e512781004bee995e
SHA256

4496b644a6644204c1e18432442c322bb0f1b12673448b0fee278e8fe91eddc2
SHA512

447269907baca468921719e71b08724499b0fa7b834473b1435fbc0974912af66d96aa4cad1c12cca67dd202bad4f788a664000199677461c9c3e46021a5dec1
SSDEEP

3072:4e8F4hUIcmRtpGh0I/bv9Lv0cU+lL/dMlZZUZ0b2gTEwARE+WpCz:E4h3pRtEh0I90c5MlYZ0b29

Score

10^/10

asyncrat stormkitty default discovery persistence phishing 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

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/1976-1-0x00000000009F0000-0x0000000000A22000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty
A potential corporate email address has been identified in the URL: WorldWindProResultsDate2024122213222AMSystemWindows10EnterpriseLTSC64BitUsernameAdminCompNameRXBCRCCRLanguageenUSAntivirusWindowsDefender.HardwareCPU12thGenIntelRCoreTMi512400GPUMicrosoftBasicDisplayAdapterRAM16157MBHWIDUnknownPowerNoSystemBattery1Screen1280x720NetworkGatewayIP10.127.0.1InternalIP10.127.0.199ExternalIP181.215.176.83BSSID6e33418f389cDomainsinfoBankLogsNodataCryptoLogsNodataFreakyLogsNodataLogsBookmarks5SoftwareDeviceWindowsproductkeyDesktopscreenshotFileGrabberDatabasefiles4TelegramChannel@XSplinter
phishing
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) 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\0c304a5237e0ab2cfac97a4e619c2585\Admin@RXBCRCCR_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\0c304a5237e0ab2cfac97a4e619c2585\Admin@RXBCRCCR_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\0c304a5237e0ab2cfac97a4e619c2585\Admin@RXBCRCCR_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\0c304a5237e0ab2cfac97a4e619c2585\Admin@RXBCRCCR_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Server.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
18	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

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 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

description	ioc	Process
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	Server.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	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
2452	cmd.exe
3744	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	Server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Server.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe
1976	Server.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1976	Server.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 2452	1976	Server.exe	89
PID 1976 wrote to memory of 2452	1976	Server.exe	89
PID 1976 wrote to memory of 2452	1976	Server.exe	89
PID 2452 wrote to memory of 1148	2452	cmd.exe	91
PID 2452 wrote to memory of 1148	2452	cmd.exe	91
PID 2452 wrote to memory of 1148	2452	cmd.exe	91
PID 2452 wrote to memory of 3744	2452	cmd.exe	92
PID 2452 wrote to memory of 3744	2452	cmd.exe	92
PID 2452 wrote to memory of 3744	2452	cmd.exe	92
PID 2452 wrote to memory of 3588	2452	cmd.exe	93
PID 2452 wrote to memory of 3588	2452	cmd.exe	93
PID 2452 wrote to memory of 3588	2452	cmd.exe	93
PID 1976 wrote to memory of 2364	1976	Server.exe	95
PID 1976 wrote to memory of 2364	1976	Server.exe	95
PID 1976 wrote to memory of 2364	1976	Server.exe	95
PID 2364 wrote to memory of 4572	2364	cmd.exe	97
PID 2364 wrote to memory of 4572	2364	cmd.exe	97
PID 2364 wrote to memory of 4572	2364	cmd.exe	97
PID 2364 wrote to memory of 1572	2364	cmd.exe	98
PID 2364 wrote to memory of 1572	2364	cmd.exe	98
PID 2364 wrote to memory of 1572	2364	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\Server.exe
"C:\Users\Admin\AppData\Local\Temp\Server.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:1976
- 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:2452
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1148
- - 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:3744
- - C:\Windows\SysWOW64\findstr.exe
    findstr All
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3588
- 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:2364
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4572
- - 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:1572

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

1

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\0c304a5237e0ab2cfac97a4e619c2585\Admin@RXBCRCCR_en-US\System\Process.txt

Filesize
4KB

MD5
f2f006e7c50ec5abb79914c69e539c5b

SHA1
7fe4b08e34c5af5a9e494c1ad3509c2147b5f23c

SHA256
a7a77df2f84d836203d9800b34052fcef61593a4d59cac87fbb9e94ea58087e7

SHA512
e677d90baba60fdcdda3d4f0e903995d713ee220745249264a7de821f2740779acadc97a1485d4cbf5c5399ab9f9564cc5e6b86b8e88bc3ec8b99f037570fe41

Download Submit
C:\Users\Admin\AppData\Local\eb22b41c897481cc4df44f7366e8fedc\msgid.dat

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/1976-104-0x0000000074FF0000-0x00000000757A1000-memory.dmp

Filesize
7.7MB

Download
memory/1976-3-0x0000000005520000-0x0000000005586000-memory.dmp

Filesize
408KB

Download
memory/1976-2-0x0000000074FF0000-0x00000000757A1000-memory.dmp

Filesize
7.7MB

Download
memory/1976-103-0x0000000074FFE000-0x0000000074FFF000-memory.dmp

Filesize
4KB

Download
memory/1976-0-0x0000000074FFE000-0x0000000074FFF000-memory.dmp

Filesize
4KB

Download
memory/1976-106-0x0000000005F10000-0x0000000005FA2000-memory.dmp

Filesize
584KB

Download
memory/1976-107-0x0000000006560000-0x0000000006B06000-memory.dmp

Filesize
5.6MB

Download
memory/1976-109-0x0000000074FF0000-0x00000000757A1000-memory.dmp

Filesize
7.7MB

Download
memory/1976-112-0x0000000006050000-0x000000000605A000-memory.dmp

Filesize
40KB

Download
memory/1976-1-0x00000000009F0000-0x0000000000A22000-memory.dmp

Filesize
200KB

Download
memory/1976-118-0x0000000074FF0000-0x00000000757A1000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads