Analysis
- max time kernel
150s - max time network
141s - platform
windows7_x64 - resource
win7-20240221-en - resource tags
- submitted
12/03/2024, 19:10
General
- Target $TEMP/syncUpd.exe
- Size 200KB
- Sample240312-xvcbpsbb37
- SHA256 2b26a0dac779643189180d9e50ace8e299c5487a9a8cdaf4300cc64a9d674b33
Malware Config
Extracted
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stealc
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http://185.172.128.145
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url_path
/3cd2b41cbde8fc9c.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 3 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
- Adds Run key to start application 2 TTPs 1 IoCs
- 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.
- Runs ping.exe 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 20 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\$TEMP\syncUpd.exe"C:\Users\Admin\AppData\Local\Temp\$TEMP\syncUpd.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 start "" "C:\Users\Admin\AppData\Local\Temp\IIDHJKFBGI.exe"2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\IIDHJKFBGI.exe"C:\Users\Admin\AppData\Local\Temp\IIDHJKFBGI.exe"3⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\IIDHJKFBGI.exe4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\PING.EXEping 2.2.2.2 -n 1 -w 30005⤵
- Runs ping.exe
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\CBKJJJDHDG.exe"2⤵
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
mozglue.dll
nss3.dll
IIDHJKFBGI.exe
memory/1992-48-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1992-2-0x0000000000220000-0x0000000000247000-memory.dmp
memory/1992-6-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/1992-28-0x00000000007A0000-0x00000000008A0000-memory.dmp
memory/1992-36-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1992-40-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1992-44-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1992-1-0x00000000007A0000-0x00000000008A0000-memory.dmp
memory/1992-4-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1992-5-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1992-74-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1992-84-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1992-85-0x00000000007A0000-0x00000000008A0000-memory.dmp
memory/1992-3-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2040-122-0x00000000022D0000-0x00000000022D1000-memory.dmp
memory/3028-114-0x0000000000980000-0x000000000099E000-memory.dmp
memory/3028-121-0x0000000072D70000-0x000000007345E000-memory.dmp
memory/3028-127-0x00000000003B0000-0x00000000003F0000-memory.dmp