Resubmissions
29/01/2024, 04:39
240129-e973taabe91029/01/2024, 02:55
240129-dew7dshgep1029/01/2024, 01:55
240129-ccg41sfdf21029/01/2024, 01:50
240129-b9jhnsgham329/01/2024, 01:26
240129-bts26sfaa410Analysis
- max time kernel
148s - max time network
149s - platform
windows10-1703_x64 - resource
win10-20231215-en - resource tags
- submitted
29/01/2024, 01:55
General
- Target excel40macroschallenge.rar
- Size 103KB
- Sample240129-ccg41sfdf2
- SHA256 024ef55d8112d913021e2f8e38294052c40d177062afebc1b462f396c86c297b
Malware Config
Extracted
-
xlm4.0
-
xlm40.dropper
https://nws.visionconsulting.ro/N1G1KCXA/dot.html
-
xlm40.dropper
https://royalpalm.sparkblue.lk/vCNhYrq3Yg8/dot.html
Signatures
- Process spawned unexpected child process 2 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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
- Modifies registry class 3 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of FindShellTrayWindow 5 IoCs
- Suspicious use of SetWindowsHookEx 14 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Windows\system32\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\excel40macroschallenge.rar1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
-
C:\Program Files\7-Zip\7zFM.exe"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\excel40macroschallenge.rar"2⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
-
-
C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\Desktop\research-1646684671.xls"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\regsvr32.exeregsvr32 -s ..\iroto.dll2⤵
- Process spawned unexpected child process
-
-
C:\Windows\SYSTEM32\regsvr32.exeregsvr32 -s ..\iroto1.dll2⤵
- Process spawned unexpected child process
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
index.dat
research-1646684671.xls
iroto.dll
memory/3744-25-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-31-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-11-0x00007FFFB06D0000-0x00007FFFB06E0000-memory.dmp
memory/3744-12-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-14-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-16-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-17-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-18-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-20-0x00007FFFACED0000-0x00007FFFACEE0000-memory.dmp
memory/3744-21-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-22-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-23-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-24-0x00007FFFEDEE0000-0x00007FFFEDF8E000-memory.dmp
memory/3744-6-0x00007FFFB06D0000-0x00007FFFB06E0000-memory.dmp
memory/3744-9-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-19-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-26-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-28-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-29-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-27-0x00007FFFACED0000-0x00007FFFACEE0000-memory.dmp
memory/3744-30-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-32-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-10-0x00007FFFB06D0000-0x00007FFFB06E0000-memory.dmp
memory/3744-7-0x00007FFFB06D0000-0x00007FFFB06E0000-memory.dmp
memory/3744-8-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-226-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-227-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp
memory/3744-228-0x00007FFFEDEE0000-0x00007FFFEDF8E000-memory.dmp
memory/3744-229-0x00007FFFF0640000-0x00007FFFF081B000-memory.dmp