Analysis
- max time kernel
157s - max time network
159s - platform
windows10_x64 - resource
win10-en-20211208 - submitted
12/01/2022, 18:43
General
- Target XAQT-159857.xlsm
- Size 84KB
- Sample220112-xcw86adfcq
- SHA256 ff0dd0d6c82eabd6f0c69da4f366755d7e300e845e1eb68342107fa69d83b53e
Malware Config
Extracted
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xlm4.0
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xlm40.dropper
http://insertcatherreview.xyz/wp-includes/o23k5ted/
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xlm40.dropper
https://mewb.org/wp-admin/2fcpQyzanzkiO1/
Signatures
- Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
- Downloads MZ/PE file
- Loads dropped DLL 2 IoCs
- Drops file in System32 directory 1 IoCs
- 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 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 3 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious use of SetWindowsHookEx 12 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
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C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\XAQT-159857.xlsm"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWow64\rundll32.exeC:\Windows\SysWow64\rundll32.exe ..\adi.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r2⤵
- Process spawned unexpected child process
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\adi.ocx",DllRegisterServer3⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Leleaaqxrmul\kiljtwg.rjk",qxNvDMTuBQgpHp4⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
memory/684-122-0x00007FFCB13B0000-0x00007FFCB13C0000-memory.dmp
memory/684-123-0x000001209BBA0000-0x000001209BBA2000-memory.dmp
memory/684-124-0x000001209BBA0000-0x000001209BBA2000-memory.dmp
memory/684-125-0x000001209BBA0000-0x000001209BBA2000-memory.dmp
memory/684-118-0x00007FFCB13B0000-0x00007FFCB13C0000-memory.dmp
memory/684-121-0x00007FFCB13B0000-0x00007FFCB13C0000-memory.dmp
memory/684-120-0x00007FFCB13B0000-0x00007FFCB13C0000-memory.dmp
memory/684-119-0x00007FFCB13B0000-0x00007FFCB13C0000-memory.dmp
memory/1412-273-0x00000000008D0000-0x00000000008F9000-memory.dmp
memory/1508-274-0x0000000000BD0000-0x0000000000BF9000-memory.dmp