asyncrat | 1afc6f0b461fe194e24493a0c57c8320518ebbd50b74234caac0c578e6843380

Analysis

max time kernel
25s
max time network
33s
platform
windows10-1703_x64
resource
win10-20240611-en
resource tags

arch:x64arch:x86image:win10-20240611-enlocale:en-usos:windows10-1703-x64system
submitted
08/08/2024, 12:45

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General

Target
Server.exe
Size 175KB
Sample240808-py547atdkr
SHA256 1afc6f0b461fe194e24493a0c57c8320518ebbd50b74234caac0c578e6843380
MD5 d26f580a002f00b4d5a855c07039d5c2
SHA1 6822685b1e1c57952c19ba9dc01ef9f94301ceb6
SHA512 b48930243c189ca1be64acfba838683882a5bb687db4e2dc09fa39e511138448818845edc78c60b503b6f00624c7cc1f47efc27985e71953c573bb83153cb2c2
SSDEEP 3072:Fe8p6ewdOIwQx76vK/bvTv0cU+lL/dMlZZUZ0b2gTXwARE+WpCc:J6ewwIwQJ6vKX0c5MlYZ0b2Q
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat stormkitty default credential_access 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/bot6494429721:AAFZ5aGg7XGnRClTicbjFHgBuAWHYq2zITI/sendMessage?chat_id=6234857847

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/2372-1-0x0000000000760000-0x0000000000792000-memory.dmp	family_stormkitty

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
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

Drops desktop.ini file(s) 7 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Local\be4d370efb55038c08628ad5faeaabed\Admin@GKUTWGDF_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\be4d370efb55038c08628ad5faeaabed\Admin@GKUTWGDF_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\be4d370efb55038c08628ad5faeaabed\Admin@GKUTWGDF_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\be4d370efb55038c08628ad5faeaabed\Admin@GKUTWGDF_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\be4d370efb55038c08628ad5faeaabed\Admin@GKUTWGDF_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\be4d370efb55038c08628ad5faeaabed\Admin@GKUTWGDF_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\be4d370efb55038c08628ad5faeaabed\Admin@GKUTWGDF_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Server.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
15	pastebin.com
16	pastebin.com

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
5	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	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	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

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
3828	cmd.exe
4824	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 15 IoCs

pid	Process
2372	Server.exe
2372	Server.exe
2372	Server.exe
2372	Server.exe
2372	Server.exe
2372	Server.exe
2372	Server.exe
2372	Server.exe
2372	Server.exe
2372	Server.exe
2372	Server.exe
2372	Server.exe
2372	Server.exe
2372	Server.exe
2372	Server.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2372	Server.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 3828	2372	Server.exe	72
PID 2372 wrote to memory of 3828	2372	Server.exe	72
PID 2372 wrote to memory of 3828	2372	Server.exe	72
PID 3828 wrote to memory of 4792	3828	cmd.exe	74
PID 3828 wrote to memory of 4792	3828	cmd.exe	74
PID 3828 wrote to memory of 4792	3828	cmd.exe	74
PID 3828 wrote to memory of 4824	3828	cmd.exe	75
PID 3828 wrote to memory of 4824	3828	cmd.exe	75
PID 3828 wrote to memory of 4824	3828	cmd.exe	75
PID 3828 wrote to memory of 4204	3828	cmd.exe	76
PID 3828 wrote to memory of 4204	3828	cmd.exe	76
PID 3828 wrote to memory of 4204	3828	cmd.exe	76
PID 2372 wrote to memory of 3280	2372	Server.exe	77
PID 2372 wrote to memory of 3280	2372	Server.exe	77
PID 2372 wrote to memory of 3280	2372	Server.exe	77
PID 3280 wrote to memory of 4632	3280	cmd.exe	79
PID 3280 wrote to memory of 4632	3280	cmd.exe	79
PID 3280 wrote to memory of 4632	3280	cmd.exe	79
PID 3280 wrote to memory of 4340	3280	cmd.exe	80
PID 3280 wrote to memory of 4340	3280	cmd.exe	80
PID 3280 wrote to memory of 4340	3280	cmd.exe	80

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:2372
- 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:3828
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4792
- - 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:4824
- - C:\Windows\SysWOW64\findstr.exe
    findstr All
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4204
- 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:3280
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4632
- - 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:4340

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

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

Web Service

T1102

Exfiltration

Impact

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Downloads

msgid.dat

Path C:\Users\Admin\AppData\Local\b8acc1595fec7faddbd195a14ab440b0\msgid.dat
Size 1B
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99
MD5 SHA1 SHA512

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Bookmarks.txt

Path C:\Users\Admin\AppData\Local\be4d370efb55038c08628ad5faeaabed\Admin@GKUTWGDF_en-US\Browsers\Firefox\Bookmarks.txt
Size 105B
SHA256 c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142
MD5 2e9d094dda5cdc3ce6519f75943a4ff4
SHA1 5d989b4ac8b699781681fe75ed9ef98191a5096c
SHA512 d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7
MD5 SHA1 SHA512

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Process.txt

Path C:\Users\Admin\AppData\Local\be4d370efb55038c08628ad5faeaabed\Admin@GKUTWGDF_en-US\System\Process.txt
Size 4KB
SHA256 32814f37dcc15e63a010fba56c4b24bf9d052b22780d4241cbc603f856f90faf
MD5 8ad505c1b48b708ec14a9234ce2b6b91
SHA1 7b52aa270c806ee42b49b2e942378d867cd8555a
SHA512 5561697159fafdc79baac2af0240e3873c389eab17bd7b94514c82ad257ed138b246eb46ed67b81b0095de8439421ff9994366b6d575eee8d2d3c6bc8c3a3c29
SSDEEP 48:3Y+6G23zffzbvuZzRiEZpChkWK6AljbC2PO:38G23zffzDMEEZphNCj
MD5 SHA1 SHA512 SSDEEP

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memory/2372-117-0x0000000073390000-0x0000000073A7E000-memory.dmp

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memory/2372-3-0x00000000052B0000-0x0000000005316000-memory.dmp

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memory/2372-2-0x0000000073390000-0x0000000073A7E000-memory.dmp

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memory/2372-0-0x000000007339E000-0x000000007339F000-memory.dmp

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memory/2372-118-0x0000000005EC0000-0x0000000005F52000-memory.dmp

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memory/2372-119-0x0000000006460000-0x000000000695E000-memory.dmp

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memory/2372-123-0x0000000005FC0000-0x0000000005FCA000-memory.dmp

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memory/2372-124-0x000000007339E000-0x000000007339F000-memory.dmp

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memory/2372-1-0x0000000000760000-0x0000000000792000-memory.dmp

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memory/2372-130-0x0000000006010000-0x0000000006022000-memory.dmp

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memory/2372-152-0x0000000073390000-0x0000000073A7E000-memory.dmp

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