Analysis
- max time kernel
157s - max time network
147s - platform
windows10_x64 - resource
win10-en-20211208 - submitted
12/01/2022, 18:44
General
- Target 392YTFAE-05054.xlsm
- Size 84KB
- Sample220112-xdf9bsdfdn
- SHA256 d0976d7cff6c14e5e16cde79aaa1d61b3ac4d1bbdb2fa04543064548bb9a4016
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\392YTFAE-05054.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\Lkotyrijfo\ontlaqzmucvc.cya",wjEwXNR4⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
memory/908-270-0x00000000012E0000-0x0000000001309000-memory.dmp
memory/2128-271-0x0000000000D00000-0x0000000000E4A000-memory.dmp
memory/3144-119-0x00007FFE01550000-0x00007FFE01560000-memory.dmp
memory/3144-120-0x0000020E8B5B0000-0x0000020E8B5B2000-memory.dmp
memory/3144-121-0x0000020E8B5B0000-0x0000020E8B5B2000-memory.dmp
memory/3144-122-0x0000020E8B5B0000-0x0000020E8B5B2000-memory.dmp
memory/3144-115-0x00007FFE01550000-0x00007FFE01560000-memory.dmp
memory/3144-118-0x00007FFE01550000-0x00007FFE01560000-memory.dmp
memory/3144-117-0x00007FFE01550000-0x00007FFE01560000-memory.dmp
memory/3144-116-0x00007FFE01550000-0x00007FFE01560000-memory.dmp