71520c6b61c641945ab1d47dd755be9ecb8dfd171fa5daf9773a99459cb45efb

General

Target
a76b40c180ed7186fe866991a1cadd7b.xls
Size 118KB
Sample220111-2v4heaabbl
SHA256 71520c6b61c641945ab1d47dd755be9ecb8dfd171fa5daf9773a99459cb45efb
MD5 a76b40c180ed7186fe866991a1cadd7b
SHA1 94adbf9f72203a3f9b5f07f6462dd1eabbda2311
SHA512 f5ea0063c74dd50bf695edff61446636b9e86fadf685e0653e38a78064006d8e339f28105ea66803a688705631fa045bf6a46aa201fa14ed9651d6fb9734bbbb
MD5 SHA1 SHA512

Score

10^/10

suricata

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://www.cuneytkocas.com/wp-content/VSnofpES1wO2CcVob/

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	3200	2708	rundll32.exe	67

suricata: ET MALWARE W32/Emotet CnC Beacon 3
suricata: ET MALWARE W32/Emotet CnC Beacon 3
suricata

Blocklisted process makes network request 2 IoCs

flow	pid	Process
41	2724	rundll32.exe
42	2724	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3200	rundll32.exe
4056	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Womjagfzk\kvgfkbkj.gvc	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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
2708	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2724	rundll32.exe
2724	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2708	EXCEL.EXE
2708	EXCEL.EXE
2708	EXCEL.EXE
2708	EXCEL.EXE
2708	EXCEL.EXE
2708	EXCEL.EXE
2708	EXCEL.EXE
2708	EXCEL.EXE
2708	EXCEL.EXE
2708	EXCEL.EXE
2708	EXCEL.EXE
2708	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2708 wrote to memory of 3200	2708	EXCEL.EXE	71
PID 2708 wrote to memory of 3200	2708	EXCEL.EXE	71
PID 2708 wrote to memory of 3200	2708	EXCEL.EXE	71
PID 3200 wrote to memory of 4056	3200	rundll32.exe	72
PID 3200 wrote to memory of 4056	3200	rundll32.exe	72
PID 3200 wrote to memory of 4056	3200	rundll32.exe	72
PID 4056 wrote to memory of 2196	4056	rundll32.exe	73
PID 4056 wrote to memory of 2196	4056	rundll32.exe	73
PID 4056 wrote to memory of 2196	4056	rundll32.exe	73
PID 2196 wrote to memory of 2724	2196	rundll32.exe	74
PID 2196 wrote to memory of 2724	2196	rundll32.exe	74
PID 2196 wrote to memory of 2724	2196	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\a76b40c180ed7186fe866991a1cadd7b.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2708
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\sun.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:3200
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\sun.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:4056
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Womjagfzk\kvgfkbkj.gvc",UZQNQg
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2196
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Womjagfzk\kvgfkbkj.gvc",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:2724

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/2708-119-0x00007FFF06850000-0x00007FFF06860000-memory.dmp

Download

memory/2708-121-0x0000017856400000-0x0000017856402000-memory.dmp

Download

memory/2708-120-0x0000017856400000-0x0000017856402000-memory.dmp

Download

memory/2708-122-0x0000017856400000-0x0000017856402000-memory.dmp

Download

memory/2708-128-0x00007FFF03D00000-0x00007FFF03D10000-memory.dmp

Download

memory/2708-129-0x00007FFF03D00000-0x00007FFF03D10000-memory.dmp

Download

memory/2708-115-0x00007FFF06850000-0x00007FFF06860000-memory.dmp

Download

memory/2708-118-0x00007FFF06850000-0x00007FFF06860000-memory.dmp

Download

memory/2708-117-0x00007FFF06850000-0x00007FFF06860000-memory.dmp

Download

memory/2708-116-0x00007FFF06850000-0x00007FFF06860000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads