asyncrat | 0a3298906b485c8e6e29be475db5774a24951c5be50c2b49b46b0f7a781a16be

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
09/01/2025, 08:02

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General

Target

AsyncClient.exe
Size

45KB
MD5

ca214fb9b9396bdf7b9309f0c88c8245
SHA1

2070423090e9311fdd6946fce08f7ab02eeaf97b
SHA256

0a3298906b485c8e6e29be475db5774a24951c5be50c2b49b46b0f7a781a16be
SHA512

244c9de86f9ae092be65d8efeb6359d862470563c1302e514cb55a18b822ef07643d86dfb2233c76b10413a51c9f56ef841a1c0ea834ebaa5ddff258e2396f66
SSDEEP

768:VuPK1TVF5l6NWUtb2Hmo2qINKjPGaG6PIyzjbFgX3iK5ogMAk15BDZfx:VuPK1TV/l12NKTkDy3bCXSKfGJdfx

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

83.99.11.13:6606

83.99.11.13:7707

83.99.11.13:8808

192.168.178.1:6606

192.168.178.1:7707

192.168.178.1:8808

255.255.255.0:6606

255.255.255.0:7707

255.255.255.0:8808

192.168.178.56:6606

192.168.178.56:7707

192.168.178.56:8808

192.168.56.1:6606

192.168.56.1:7707

192.168.56.1:8808

172.29.128.1:6606

172.29.128.1:7707

172.29.128.1:8808

Mutex

HTKBgEz9kLr9

Attributes

delay
3
install
false
install_file
virus.exe
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

System Location Discovery: System Language Discovery 1 TTPs 1 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	AsyncClient.exe

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3870231897-2573482396-1083937135-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:"	BackgroundTransferHost.exe
Key created	\REGISTRY\USER\S-1-5-21-3870231897-2573482396-1083937135-1000_Classes\Local Settings\MuiCache	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3870231897-2573482396-1083937135-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3870231897-2573482396-1083937135-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	BackgroundTransferHost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
448	MiniSearchHost.exe

C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2808

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:5852

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
1⤵
- Suspicious use of SetWindowsHookEx
PID:448

C:\Windows\system32\BackgroundTransferHost.exe
"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
1⤵
- Modifies registry class
PID:3348

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\BackgroundTransferApi\6659c1ab-f014-46f4-9a08-06d98c42d1b1.down_data

Filesize
555KB

MD5
5683c0028832cae4ef93ca39c8ac5029

SHA1
248755e4e1db552e0b6f8651b04ca6d1b31a86fb

SHA256
855abd360d8a8d6974eba92b70cbd09ce519bc8773439993f9ab37cb6847309e

SHA512
aba434bd29be191c823b02ea9b639beb10647bbe7759bbffdaa790dfb1ec2c58d74c525ef11aacda209e4effe322d1d3a07b115446c8914b07a3bce4d8a0e2c3

Download Submit
memory/2808-0-0x0000000074FDE000-0x0000000074FDF000-memory.dmp

Filesize
4KB

Download
memory/2808-1-0x0000000000EF0000-0x0000000000F02000-memory.dmp

Filesize
72KB

Download
memory/2808-2-0x0000000074FD0000-0x0000000075781000-memory.dmp

Filesize
7.7MB

Download
memory/2808-3-0x0000000074FDE000-0x0000000074FDF000-memory.dmp

Filesize
4KB

Download
memory/2808-4-0x0000000074FD0000-0x0000000075781000-memory.dmp

Filesize
7.7MB

Download