Analysis
- max time kernel
140s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
11/11/2022, 01:35
General
- Target newfile42.xlsm
- Size 56KB
- Sample221111-bzzrxagac6
- SHA256 7cf7b8e58c5955697c7de6b8d90936ba16fde52e1004c5854ad5b2a731b8a7b0
Malware Config
Extracted
-
bumblebee
-
0411r
-
172.86.121.123:443
-
176.223.165.125:443
-
45.66.248.216:443
Signatures
- BumbleBee
BumbleBee is a webshell malware written in C++.
- Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
- Blocklisted process makes network request 1 IoCs
- Downloads MZ/PE file
- Loads dropped DLL 1 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- 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 2 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\newfile42.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\SYSTEM32\rundll32.exerundll32 name.dll,SendData2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious use of NtCreateThreadExHideFromDebugger
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
name.dll
name.dll
memory/4412-142-0x00000262A07B0000-0x00000262A08F9000-memory.dmp
memory/4412-143-0x00000262A05F0000-0x00000262A0666000-memory.dmp
memory/4868-132-0x00007FFFBD930000-0x00007FFFBD940000-memory.dmp
memory/4868-133-0x00007FFFBD930000-0x00007FFFBD940000-memory.dmp
memory/4868-134-0x00007FFFBD930000-0x00007FFFBD940000-memory.dmp
memory/4868-135-0x00007FFFBD930000-0x00007FFFBD940000-memory.dmp
memory/4868-136-0x00007FFFBD930000-0x00007FFFBD940000-memory.dmp
memory/4868-137-0x00007FFFBB660000-0x00007FFFBB670000-memory.dmp
memory/4868-138-0x00007FFFBB660000-0x00007FFFBB670000-memory.dmp