Analysis
- max time kernel
122s - max time network
122s - platform
windows7_x64 - resource
win7-en-20211104 - submitted
09/11/2021, 12:08
General
- Target gunzipped.exe
- Size 290KB
- Sample211109-pawkvaccbr
- SHA256 c0de21d15f1dad36f96956a301c4db992fd6c2964e3f4855590da5fa2d7665eb
Malware Config
Extracted
-
azorult
-
http://45.144.225.103/xsaz/index.php
Signatures
- Azorult
An information stealer that was first discovered in 2016, targeting browsing history and passwords.
- suricata: ET MALWARE AZORult v3.3 Server Response M3
suricata: ET MALWARE AZORult v3.3 Server Response M3
- suricata: ET MALWARE Win32/AZORult V3.3 Client Checkin M5
suricata: ET MALWARE Win32/AZORult V3.3 Client Checkin M5
- Deletes itself 1 IoCs
- Loads dropped DLL 16 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\gunzipped.exe"C:\Users\Admin\AppData\Local\Temp\gunzipped.exe"1⤵
- Loads dropped DLL
- Accesses Microsoft Outlook profiles
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c C:\Windows\system32\timeout.exe 3 & del "gunzipped.exe"2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exeC:\Windows\system32\timeout.exe 33⤵
- Delays execution with timeout.exe
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1196-58-0x0000000000400000-0x0000000002B41000-memory.dmp
memory/1196-55-0x0000000002CCD000-0x0000000002CDE000-memory.dmp
memory/1196-57-0x0000000000220000-0x000000000023D000-memory.dmp
memory/1196-56-0x0000000075A61000-0x0000000075A63000-memory.dmp