02fef2f393dfa1693167af8424ff91f298d3c12bad8411580f82548c7876cdfd

General

Target
5280_36.xlsm
Size 83KB
Sample220114-q22fvageb2
SHA256 02fef2f393dfa1693167af8424ff91f298d3c12bad8411580f82548c7876cdfd
MD5 e30cea246a3807be6924c3ea52e10079
SHA1 ffc27600e071e38e78a29174fc885d4e2bbdb0ad
SHA512 2aa326bf12d41574aada70cbb486057cad037ea36ed04fe718a62e027eef0694c6a2da082219e68470242bd8a7d8798a2ae89c43d633e6dfd94a7a68a04d35f5
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://badmakeup.biz/dhl/3ez4GMS65Gk6Bgxd/

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2068	3680	rundll32.exe	67

Blocklisted process makes network request 3 IoCs

flow	pid	Process
37	1172	rundll32.exe
38	1172	rundll32.exe
40	1172	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2068	rundll32.exe
2408	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Pbokxhvhzfx\oigqbabeqceei.uba	rundll32.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3680	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1172	rundll32.exe
1172	rundll32.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
3680	EXCEL.EXE
3680	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3680 wrote to memory of 2068	3680	EXCEL.EXE	70
PID 3680 wrote to memory of 2068	3680	EXCEL.EXE	70
PID 3680 wrote to memory of 2068	3680	EXCEL.EXE	70
PID 2068 wrote to memory of 2408	2068	rundll32.exe	71
PID 2068 wrote to memory of 2408	2068	rundll32.exe	71
PID 2068 wrote to memory of 2408	2068	rundll32.exe	71
PID 2408 wrote to memory of 4824	2408	rundll32.exe	73
PID 2408 wrote to memory of 4824	2408	rundll32.exe	73
PID 2408 wrote to memory of 4824	2408	rundll32.exe	73
PID 4824 wrote to memory of 1172	4824	rundll32.exe	74
PID 4824 wrote to memory of 1172	4824	rundll32.exe	74
PID 4824 wrote to memory of 1172	4824	rundll32.exe	74

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\5280_36.xlsm"
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
PID:3680
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\erum.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2068
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\erum.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:2408
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Pbokxhvhzfx\oigqbabeqceei.uba",GCpca
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4824
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Pbokxhvhzfx\oigqbabeqceei.uba",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:1172

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/3680-118-0x00007FFBBFC80000-0x00007FFBBFC90000-memory.dmp

Download

memory/3680-127-0x00007FFBBFC80000-0x00007FFBBFC90000-memory.dmp

Download

memory/3680-121-0x000002C8A7430000-0x000002C8A7432000-memory.dmp

Download

memory/3680-120-0x000002C8A7430000-0x000002C8A7432000-memory.dmp

Download

memory/3680-119-0x000002C8A7430000-0x000002C8A7432000-memory.dmp

Download

memory/3680-115-0x00007FFBBFC80000-0x00007FFBBFC90000-memory.dmp

Download

memory/3680-117-0x00007FFBBFC80000-0x00007FFBBFC90000-memory.dmp

Download

memory/3680-116-0x00007FFBBFC80000-0x00007FFBBFC90000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads