Analysis
- max time kernel
147s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20230221-en - resource tags
- submitted
28/03/2023, 00:38
General
- Target Yahoo vip main.exe
- Size 170KB
- Sample230328-ay3azaga76
- SHA256 54bff116750016cbac31b375618ba2ac2c48ffcd4e5f3a9ed17fb47dc643f0b2
Malware Config
Extracted
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asyncrat
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Default
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127.0.0.1:6606
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127.0.0.1:7707
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127.0.0.1:8808
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https://api.telegram.org/bot5447971983:AAEyGzmpMnfnOMFAs-AZ8bfDhMbyzlgiMGU/sendMessage?chat_id=1996494138
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AsyncMutex_6SI8OkPnk
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delay
3
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install
false
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install_folder
%AppData%
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- StormKitty
StormKitty is an open source info stealer written in C#.
- StormKitty payload 1 IoCs
- Async RAT payload 1 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Drops desktop.ini file(s) 8 IoCs
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 25 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 21 IoCs
Processes
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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
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C:\Windows\SysWOW64\cmd.exe"cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\chcp.comchcp 650013⤵
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C:\Windows\SysWOW64\netsh.exenetsh wlan show profile3⤵
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C:\Windows\SysWOW64\findstr.exefindstr All3⤵
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C:\Windows\SysWOW64\cmd.exe"cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\chcp.comchcp 650013⤵
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C:\Windows\SysWOW64\netsh.exenetsh wlan show networks mode=bssid3⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
Bookmarks.txt
Process.txt
msgid.dat
memory/956-277-0x00000000068B0000-0x0000000006942000-memory.dmp
memory/956-219-0x0000000005970000-0x0000000005980000-memory.dmp
memory/956-135-0x0000000005A80000-0x0000000005AE6000-memory.dmp
memory/956-133-0x0000000000FC0000-0x0000000000FF0000-memory.dmp
memory/956-278-0x0000000006F00000-0x00000000074A4000-memory.dmp
memory/956-280-0x0000000005970000-0x0000000005980000-memory.dmp
memory/956-283-0x0000000006AF0000-0x0000000006AFA000-memory.dmp
memory/956-134-0x0000000005970000-0x0000000005980000-memory.dmp
memory/956-289-0x0000000007770000-0x0000000007782000-memory.dmp
memory/956-312-0x0000000005970000-0x0000000005980000-memory.dmp