Analysis
- max time kernel
149s - max time network
138s - platform
windows10_x64 - resource
win10-en-20211208 - submitted
11/01/2022, 10:24
General
- Target a9d2bcd6bcfd2621848a45a0e9cfc08d.xls
- Size 113KB
- Sample220111-mfdk4sfdhr
- SHA256 fd9f32d79ea98273f97ea6c36042a4f43ee66720751a3e650eaa6f3f5e2dcbd1
Malware Config
Extracted
-
xlm4.0
-
xlm40.dropper
http://gaidov.bg/wp-includes/Ug/
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
-
C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\a9d2bcd6bcfd2621848a45a0e9cfc08d.xls"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWow64\rundll32.exeC:\Windows\SysWow64\rundll32.exe ..\sun.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r2⤵
- Process spawned unexpected child process
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\sun.ocx",DllRegisterServer3⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Xnuufwubhphtul\ilqitlpqrqq.xcp",qXWFiC4⤵
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
memory/2164-266-0x0000000002750000-0x000000000289A000-memory.dmp
memory/2992-119-0x000001D055AB0000-0x000001D055AB2000-memory.dmp
memory/2992-120-0x000001D055AB0000-0x000001D055AB2000-memory.dmp
memory/2992-121-0x00007FF879910000-0x00007FF879920000-memory.dmp
memory/2992-122-0x000001D055AB0000-0x000001D055AB2000-memory.dmp
memory/2992-115-0x00007FF879910000-0x00007FF879920000-memory.dmp
memory/2992-118-0x00007FF879910000-0x00007FF879920000-memory.dmp
memory/2992-117-0x00007FF879910000-0x00007FF879920000-memory.dmp
memory/2992-116-0x00007FF879910000-0x00007FF879920000-memory.dmp
memory/3092-267-0x0000000002EF0000-0x000000000303A000-memory.dmp