asyncrat | 85ca4cd1bdc0b219e0513bca055913d18debf0e6ef752a5814cb9b87af2bd646

General

Target

a0.exe
Size

170KB
MD5

a0ce182a26b24adf936411f4ea796ab7
SHA1

a764ea86541665181d7080fe2a2c534a6acc6c5b
SHA256

85ca4cd1bdc0b219e0513bca055913d18debf0e6ef752a5814cb9b87af2bd646
SHA512

de9db377614cfead6043022d2413d47821cd38dd5e751a6e91d3e37db4965217c92607495e15dcee834afec4fd22490635cd0377ec6f510126bf65dd4824b69b
SSDEEP

3072:T+STW8djpN6izj8mZw24FBPBrL2eFcyZlVqIPu/i9bDq2cKk6+Wpn:w8XN6W8mm2anrL2eFcyvVXPSi9b+

Score

10^/10

asyncrat stormkitty default 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

https://api.telegram.org/bot5081755732:AAFIzASZTZ42XUhPubF2E6ugH8B5BoBq2GY/sendMessage?chat_id=1184265544

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 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1996-54-0x00000000000E0000-0x0000000000110000-memory.dmp	family_stormkitty
behavioral1/memory/1996-55-0x0000000004AE0000-0x0000000004B20000-memory.dmp	family_stormkitty

Async RAT payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1996-54-0x00000000000E0000-0x0000000000110000-memory.dmp	asyncrat
behavioral1/memory/1996-55-0x0000000004AE0000-0x0000000004B20000-memory.dmp	asyncrat

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
T1081

Drops desktop.ini file(s) 6 IoCs

Processes:

a0.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Local\140dc5ec3cb7ef8c8c9c890b57ce9fb0\Admin@THEQWNRW_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	a0.exe
File created	C:\Users\Admin\AppData\Local\140dc5ec3cb7ef8c8c9c890b57ce9fb0\Admin@THEQWNRW_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	a0.exe
File created	C:\Users\Admin\AppData\Local\140dc5ec3cb7ef8c8c9c890b57ce9fb0\Admin@THEQWNRW_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	a0.exe
File opened for modification	C:\Users\Admin\AppData\Local\140dc5ec3cb7ef8c8c9c890b57ce9fb0\Admin@THEQWNRW_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	a0.exe
File created	C:\Users\Admin\AppData\Local\140dc5ec3cb7ef8c8c9c890b57ce9fb0\Admin@THEQWNRW_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	a0.exe
File opened for modification	C:\Users\Admin\AppData\Local\140dc5ec3cb7ef8c8c9c890b57ce9fb0\Admin@THEQWNRW_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	a0.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.

Processes:

flow ioc

3 icanhazip.com
Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.

flow	ioc
3	icanhazip.com

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

Processes:

a0.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	a0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	a0.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

a0.exe

pid process

1996 a0.exe
1996 a0.exe
1996 a0.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

a0.exe

description pid process

Token: SeDebugPrivilege 1996 a0.exe

pid	process
1996	a0.exe
1996	a0.exe
1996	a0.exe

description	pid	process
Token: SeDebugPrivilege	1996	a0.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

a0.execmd.execmd.exe

description	pid	process	target process
PID 1996 wrote to memory of 1656	1996	a0.exe	cmd.exe
PID 1996 wrote to memory of 1656	1996	a0.exe	cmd.exe
PID 1996 wrote to memory of 1656	1996	a0.exe	cmd.exe
PID 1996 wrote to memory of 1656	1996	a0.exe	cmd.exe
PID 1656 wrote to memory of 1032	1656	cmd.exe	chcp.com
PID 1656 wrote to memory of 1032	1656	cmd.exe	chcp.com
PID 1656 wrote to memory of 1032	1656	cmd.exe	chcp.com
PID 1656 wrote to memory of 1032	1656	cmd.exe	chcp.com
PID 1656 wrote to memory of 1864	1656	cmd.exe	netsh.exe
PID 1656 wrote to memory of 1864	1656	cmd.exe	netsh.exe
PID 1656 wrote to memory of 1864	1656	cmd.exe	netsh.exe
PID 1656 wrote to memory of 1864	1656	cmd.exe	netsh.exe
PID 1656 wrote to memory of 284	1656	cmd.exe	findstr.exe
PID 1656 wrote to memory of 284	1656	cmd.exe	findstr.exe
PID 1656 wrote to memory of 284	1656	cmd.exe	findstr.exe
PID 1656 wrote to memory of 284	1656	cmd.exe	findstr.exe
PID 1996 wrote to memory of 1696	1996	a0.exe	cmd.exe
PID 1996 wrote to memory of 1696	1996	a0.exe	cmd.exe
PID 1996 wrote to memory of 1696	1996	a0.exe	cmd.exe
PID 1996 wrote to memory of 1696	1996	a0.exe	cmd.exe
PID 1696 wrote to memory of 1940	1696	cmd.exe	chcp.com
PID 1696 wrote to memory of 1940	1696	cmd.exe	chcp.com
PID 1696 wrote to memory of 1940	1696	cmd.exe	chcp.com
PID 1696 wrote to memory of 1940	1696	cmd.exe	chcp.com
PID 1696 wrote to memory of 1248	1696	cmd.exe	netsh.exe
PID 1696 wrote to memory of 1248	1696	cmd.exe	netsh.exe
PID 1696 wrote to memory of 1248	1696	cmd.exe	netsh.exe
PID 1696 wrote to memory of 1248	1696	cmd.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\a0.exe
"C:\Users\Admin\AppData\Local\Temp\a0.exe"
1⤵
- Drops desktop.ini file(s)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1996

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
2⤵
- Suspicious use of WriteProcessMemory
PID:1656

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
PID:1032

C:\Windows\SysWOW64\netsh.exe
netsh wlan show profile
3⤵
PID:1864

C:\Windows\SysWOW64\findstr.exe
findstr All
3⤵
PID:284

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
2⤵
- Suspicious use of WriteProcessMemory
PID:1696

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
PID:1940

C:\Windows\SysWOW64\netsh.exe
netsh wlan show networks mode=bssid
3⤵
PID:1248

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\b6af749fec27730475d0312ff56d0d33\msgid.dat
Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/1996-54-0x00000000000E0000-0x0000000000110000-memory.dmp

Filesize
192KB

Download
memory/1996-55-0x0000000004AE0000-0x0000000004B20000-memory.dmp

Filesize
256KB

Download
memory/1996-124-0x0000000004AE0000-0x0000000004B20000-memory.dmp

Filesize
256KB

Download
memory/1996-127-0x0000000004AE0000-0x0000000004B20000-memory.dmp

Filesize
256KB

Download
memory/1996-128-0x0000000004AE0000-0x0000000004B20000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads