Analysis
- max time kernel
47s - max time network
145s - platform
windows10-2004_x64 - resource
win10v2004-20231215-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).
- Program crash 1 IoCs
- 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 2 IoCs
Processes
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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
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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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-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 5036 -s 24362⤵
- Program crash
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 5036 -ip 50361⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Are.docx
mozglue.dll
mozglue.dll
nss3.dll
memory/5036-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/5036-49-0x0000000000400000-0x0000000000851000-memory.dmp
memory/5036-2-0x00000000025A0000-0x00000000025BC000-memory.dmp
memory/5036-1-0x00000000009D0000-0x0000000000AD0000-memory.dmp
memory/5036-83-0x00000000025A0000-0x00000000025BC000-memory.dmp
memory/5036-82-0x00000000009D0000-0x0000000000AD0000-memory.dmp
memory/5036-81-0x0000000000400000-0x0000000000851000-memory.dmp
memory/5036-3-0x0000000000400000-0x0000000000851000-memory.dmp
memory/5036-89-0x0000000000400000-0x0000000000851000-memory.dmp
memory/5036-92-0x0000000000400000-0x0000000000851000-memory.dmp
memory/5036-93-0x0000000000400000-0x0000000000851000-memory.dmp