Analysis
- max time kernel
181s - max time network
206s - platform
windows7_x64 - resource
win7-20231215-en - resource tags
- submitted
29/12/2023, 16:51
General
- Target e1a43c5dade2825c2dfa9ef9c41c552709f15875174c9.exe
- Size 189KB
- Sample231229-vcs6dsecfl
- SHA256 e1a43c5dade2825c2dfa9ef9c41c552709f15875174c97af87d1884ca5575e2a
Malware Config
Extracted
-
stealc
-
http://5.42.66.57
-
url_path
/3886d2276f6914c4.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Loads dropped DLL 2 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- 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).
- 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 4 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\e1a43c5dade2825c2dfa9ef9c41c552709f15875174c9.exe"C:\Users\Admin\AppData\Local\Temp\e1a43c5dade2825c2dfa9ef9c41c552709f15875174c9.exe"1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\e1a43c5dade2825c2dfa9ef9c41c552709f15875174c9.exe" & del "C:\ProgramData\*.dll"" & exit2⤵
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C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
-
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
mozglue.dll
nss3.dll
memory/2584-51-0x0000000000400000-0x0000000000851000-memory.dmp
memory/2584-58-0x0000000000400000-0x0000000000851000-memory.dmp
memory/2584-5-0x00000000009B0000-0x0000000000AB0000-memory.dmp
memory/2584-8-0x0000000000400000-0x0000000000851000-memory.dmp
memory/2584-9-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2584-38-0x0000000000400000-0x0000000000851000-memory.dmp
memory/2584-2-0x0000000000220000-0x000000000023C000-memory.dmp
memory/2584-4-0x0000000000400000-0x0000000000851000-memory.dmp
memory/2584-3-0x0000000000400000-0x0000000000851000-memory.dmp
memory/2584-1-0x00000000009B0000-0x0000000000AB0000-memory.dmp
memory/2584-75-0x0000000000400000-0x0000000000851000-memory.dmp
memory/2584-79-0x0000000000400000-0x0000000000851000-memory.dmp
memory/2584-80-0x0000000000400000-0x0000000000851000-memory.dmp
memory/2584-83-0x0000000000400000-0x0000000000851000-memory.dmp
memory/2584-84-0x00000000009B0000-0x0000000000AB0000-memory.dmp