Analysis
- max time kernel
226s - max time network
231s - platform
windows10-1703_x64 - resource
win10-20220812-en - resource tags
- submitted
21/10/2022, 10:18
General
- Target myfile.exe
- Size 4.3MB
- Sample221021-mcf7tsfcap
- SHA256 e3942b398296e89e5f5ace5f17b52540e6a2543248b3c7992e19a0688befca13
Malware Config
Signatures
- Modifies extensions of user files 2 IoCs
Ransomware generally changes the extension on encrypted files.
- Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 3 IoCs
- GoLang User-Agent 1 IoCs
Uses default user-agent string defined by GoLang HTTP packages.
- Modifies Internet Explorer settings 1 TTPs 12 IoCs
- Suspicious behavior: AddClipboardFormatListener 2 IoCs
- Suspicious use of SetWindowsHookEx 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\myfile.exe"C:\Users\Admin\AppData\Local\Temp\myfile.exe"1⤵
- Modifies extensions of user files
-
C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵
-
C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\README.doc" /o ""1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
README.doc
memory/3824-120-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-121-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-122-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-123-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-124-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-125-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-126-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-127-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-128-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-129-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-130-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-131-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-132-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-134-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-133-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-136-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-135-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-137-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-138-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-139-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-140-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-141-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-142-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-143-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-144-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-145-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-146-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-147-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-148-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-149-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-150-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-151-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-152-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-153-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-154-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-155-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-156-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-157-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-158-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-159-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-160-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-161-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-162-0x0000000077600000-0x000000007778E000-memory.dmp
memory/3824-163-0x0000000077600000-0x000000007778E000-memory.dmp
memory/4152-164-0x00007FFA93810000-0x00007FFA93820000-memory.dmp
memory/4152-165-0x00007FFA93810000-0x00007FFA93820000-memory.dmp
memory/4152-166-0x00007FFA93810000-0x00007FFA93820000-memory.dmp
memory/4152-167-0x00007FFA93810000-0x00007FFA93820000-memory.dmp
memory/4152-170-0x00007FFA90A40000-0x00007FFA90A50000-memory.dmp
memory/4152-171-0x00007FFA90A40000-0x00007FFA90A50000-memory.dmp
memory/4152-380-0x00007FFA93810000-0x00007FFA93820000-memory.dmp
memory/4152-381-0x00007FFA93810000-0x00007FFA93820000-memory.dmp
memory/4152-382-0x00007FFA93810000-0x00007FFA93820000-memory.dmp
memory/4152-383-0x00007FFA93810000-0x00007FFA93820000-memory.dmp