Analysis
- max time kernel
151s - max time network
136s - platform
windows10_x64 - resource
win10-en-20211208 - submitted
13/01/2022, 02:37
General
- Target SecuriteInfo.com.Trojan.Skarlet.3.Gen.29101.7523.xlsm
- Size 83KB
- Sample220113-c359jafch7
- SHA256 60610dee4927e907b5a6a4ac49f8c921fa8af7005b2e8deb2b26ffcc1cac6322
Malware Config
Extracted
-
xlm4.0
-
xlm40.dropper
http://yuanbinglun.com/www.yuanbinglun.com/7kKwqmxRWQK0OLi/
-
xlm40.dropper
http://laserjetprintersreview.xyz/wp-includes/BJ6yUJ/
-
xlm40.dropper
http://2021.posadamision.com/wp-admin/IoqaL08/
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\SecuriteInfo.com.Trojan.Skarlet.3.Gen.29101.7523.xlsm"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 ..\dwa.ocx,D"&"l"&"lR"&"egister"&"Server2⤵
- Process spawned unexpected child process
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\dwa.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\Epbyssdyizfz\qmmxs.vzy",zsGu4⤵
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
memory/508-119-0x00007FFB38F60000-0x00007FFB38F70000-memory.dmp
memory/508-116-0x00007FFB38F60000-0x00007FFB38F70000-memory.dmp
memory/508-120-0x0000013B99410000-0x0000013B99412000-memory.dmp
memory/508-121-0x0000013B99410000-0x0000013B99412000-memory.dmp
memory/508-122-0x0000013B99410000-0x0000013B99412000-memory.dmp
memory/508-128-0x00007FFB36410000-0x00007FFB36420000-memory.dmp
memory/508-129-0x00007FFB36410000-0x00007FFB36420000-memory.dmp
memory/508-118-0x00007FFB38F60000-0x00007FFB38F70000-memory.dmp
memory/508-117-0x00007FFB38F60000-0x00007FFB38F70000-memory.dmp
memory/508-115-0x00007FFB38F60000-0x00007FFB38F70000-memory.dmp
memory/2484-285-0x00000000004D0000-0x000000000061A000-memory.dmp
memory/3028-282-0x0000000003190000-0x00000000031B9000-memory.dmp