asyncrat | 54bff116750016cbac31b375618ba2ac2c48ffcd4e5f3a9ed17fb47dc643f0b2

General

Target

Yahoo vip main.exe
Size

170KB
MD5

6d87862930811eb7b0ba7b9bf4ebe206
SHA1

b5157f5388f62b179d163201c330be0e8cada959
SHA256

54bff116750016cbac31b375618ba2ac2c48ffcd4e5f3a9ed17fb47dc643f0b2
SHA512

6e946c573b5d352612a382eb121d7973df1a62608d6a2c95644ac57066102c0c1d1902d4233baa20c737acf090ceeb975c8afd1b5d0eac3be39105192cf27d39
SSDEEP

3072:W3ST4aYp5zZb2faAaVZURF4AUwUMonU/4okDVqIPu/i9b4J2curxy+Wp6:AaozZQ7aVOwZXPSi9b04

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/bot5447971983:AAEyGzmpMnfnOMFAs-AZ8bfDhMbyzlgiMGU/sendMessage?chat_id=1996494138

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

Processes:

resource	yara_rule
behavioral1/memory/2004-54-0x00000000008A0000-0x00000000008D0000-memory.dmp	family_stormkitty

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/2004-54-0x00000000008A0000-0x00000000008D0000-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) 8 IoCs

Processes:

Yahoo vip main.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Local\08332042233e75d65e2c1863b5a5a250\Admin@MLXLFKOI_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Yahoo vip main.exe
File created	C:\Users\Admin\AppData\Local\08332042233e75d65e2c1863b5a5a250\Admin@MLXLFKOI_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	Yahoo vip main.exe
File opened for modification	C:\Users\Admin\AppData\Local\08332042233e75d65e2c1863b5a5a250\Admin@MLXLFKOI_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	Yahoo vip main.exe
File created	C:\Users\Admin\AppData\Local\08332042233e75d65e2c1863b5a5a250\Admin@MLXLFKOI_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Yahoo vip main.exe
File opened for modification	C:\Users\Admin\AppData\Local\08332042233e75d65e2c1863b5a5a250\Admin@MLXLFKOI_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Yahoo vip main.exe
File created	C:\Users\Admin\AppData\Local\08332042233e75d65e2c1863b5a5a250\Admin@MLXLFKOI_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Yahoo vip main.exe
File opened for modification	C:\Users\Admin\AppData\Local\08332042233e75d65e2c1863b5a5a250\Admin@MLXLFKOI_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Yahoo vip main.exe
File created	C:\Users\Admin\AppData\Local\08332042233e75d65e2c1863b5a5a250\Admin@MLXLFKOI_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Yahoo vip main.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:

Yahoo vip main.exe

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

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

Yahoo vip main.exe

pid process

2004 Yahoo vip main.exe
2004 Yahoo vip main.exe
2004 Yahoo vip main.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Yahoo vip main.exe

description pid process

Token: SeDebugPrivilege 2004 Yahoo vip main.exe

pid	process
2004	Yahoo vip main.exe
2004	Yahoo vip main.exe
2004	Yahoo vip main.exe

description	pid	process
Token: SeDebugPrivilege	2004	Yahoo vip main.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

Yahoo vip main.execmd.execmd.exe

description	pid	process	target process
PID 2004 wrote to memory of 1204	2004	Yahoo vip main.exe	cmd.exe
PID 2004 wrote to memory of 1204	2004	Yahoo vip main.exe	cmd.exe
PID 2004 wrote to memory of 1204	2004	Yahoo vip main.exe	cmd.exe
PID 2004 wrote to memory of 1204	2004	Yahoo vip main.exe	cmd.exe
PID 1204 wrote to memory of 1076	1204	cmd.exe	chcp.com
PID 1204 wrote to memory of 1076	1204	cmd.exe	chcp.com
PID 1204 wrote to memory of 1076	1204	cmd.exe	chcp.com
PID 1204 wrote to memory of 1076	1204	cmd.exe	chcp.com
PID 1204 wrote to memory of 1804	1204	cmd.exe	netsh.exe
PID 1204 wrote to memory of 1804	1204	cmd.exe	netsh.exe
PID 1204 wrote to memory of 1804	1204	cmd.exe	netsh.exe
PID 1204 wrote to memory of 1804	1204	cmd.exe	netsh.exe
PID 1204 wrote to memory of 1760	1204	cmd.exe	findstr.exe
PID 1204 wrote to memory of 1760	1204	cmd.exe	findstr.exe
PID 1204 wrote to memory of 1760	1204	cmd.exe	findstr.exe
PID 1204 wrote to memory of 1760	1204	cmd.exe	findstr.exe
PID 2004 wrote to memory of 1588	2004	Yahoo vip main.exe	cmd.exe
PID 2004 wrote to memory of 1588	2004	Yahoo vip main.exe	cmd.exe
PID 2004 wrote to memory of 1588	2004	Yahoo vip main.exe	cmd.exe
PID 2004 wrote to memory of 1588	2004	Yahoo vip main.exe	cmd.exe
PID 1588 wrote to memory of 1700	1588	cmd.exe	chcp.com
PID 1588 wrote to memory of 1700	1588	cmd.exe	chcp.com
PID 1588 wrote to memory of 1700	1588	cmd.exe	chcp.com
PID 1588 wrote to memory of 1700	1588	cmd.exe	chcp.com
PID 1588 wrote to memory of 1952	1588	cmd.exe	netsh.exe
PID 1588 wrote to memory of 1952	1588	cmd.exe	netsh.exe
PID 1588 wrote to memory of 1952	1588	cmd.exe	netsh.exe
PID 1588 wrote to memory of 1952	1588	cmd.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\Yahoo vip main.exe
"C:\Users\Admin\AppData\Local\Temp\Yahoo vip main.exe"
1⤵
- Drops desktop.ini file(s)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2004

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
2⤵
- Suspicious use of WriteProcessMemory
PID:1204

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
PID:1076

C:\Windows\SysWOW64\netsh.exe
netsh wlan show profile
3⤵
PID:1804

C:\Windows\SysWOW64\findstr.exe
findstr All
3⤵
PID:1760

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
2⤵
- Suspicious use of WriteProcessMemory
PID:1588

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
PID:1700

C:\Windows\SysWOW64\netsh.exe
netsh wlan show networks mode=bssid
3⤵
PID:1952

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\08332042233e75d65e2c1863b5a5a250\Admin@MLXLFKOI_en-US\Browsers\Firefox\Bookmarks.txt
Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\dea469dc749421652ba131afb493f296\msgid.dat
Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/2004-54-0x00000000008A0000-0x00000000008D0000-memory.dmp

Filesize
192KB

Download
memory/2004-55-0x0000000004680000-0x00000000046C0000-memory.dmp

Filesize
256KB

Download
memory/2004-124-0x0000000004680000-0x00000000046C0000-memory.dmp

Filesize
256KB

Download
memory/2004-127-0x0000000004680000-0x00000000046C0000-memory.dmp

Filesize
256KB

Download
memory/2004-128-0x0000000004680000-0x00000000046C0000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads