c5850b16a368ab7c8f2d03cebcc7dd51173a704cdd1d6c105ba43083a40b6063

General

Target
1b65d20cdf25ceebefbb478343160ed8.xls
Size 113KB
Sample220111-vmze6agfdn
SHA256 c5850b16a368ab7c8f2d03cebcc7dd51173a704cdd1d6c105ba43083a40b6063
MD5 1b65d20cdf25ceebefbb478343160ed8
SHA1 6b23cd052471a569d437b9d6d86b0130dc7ef91a
SHA512 0ca82821bb0349fc8a05aadf7ad9a27add2a60ba31a10f3af82981cb3e85ef5cb2395005cda99b88171ef7fb804070d7052f3d5a3694245b119d0d2232059b10
MD5 SHA1 SHA512

Score

10^/10

suricata

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://gaidov.bg/wp-includes/Ug/
xlm40.dropper
http://studiokrishnaproduction.com/wp-includes/3mJ/

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	3780	4092	rundll32.exe	68

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

Blocklisted process makes network request 1 IoCs

flow	pid	Process
43	3844	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3780	rundll32.exe
1568	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Gqeuml\llsomplouqaukj.nxa	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
4092	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3844	rundll32.exe
3844	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 3780	4092	EXCEL.EXE	71
PID 4092 wrote to memory of 3780	4092	EXCEL.EXE	71
PID 4092 wrote to memory of 3780	4092	EXCEL.EXE	71
PID 3780 wrote to memory of 1568	3780	rundll32.exe	72
PID 3780 wrote to memory of 1568	3780	rundll32.exe	72
PID 3780 wrote to memory of 1568	3780	rundll32.exe	72
PID 1568 wrote to memory of 2180	1568	rundll32.exe	73
PID 1568 wrote to memory of 2180	1568	rundll32.exe	73
PID 1568 wrote to memory of 2180	1568	rundll32.exe	73
PID 2180 wrote to memory of 3844	2180	rundll32.exe	74
PID 2180 wrote to memory of 3844	2180	rundll32.exe	74
PID 2180 wrote to memory of 3844	2180	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\1b65d20cdf25ceebefbb478343160ed8.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4092
- 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:3780
- - 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:1568
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Gqeuml\llsomplouqaukj.nxa",ZkLenu
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2180
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Gqeuml\llsomplouqaukj.nxa",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:3844

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

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Downloads

memory/4092-121-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Download

memory/4092-130-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Download

memory/4092-124-0x000001CFAE9B0000-0x000001CFAE9B2000-memory.dmp

Download

memory/4092-123-0x000001CFAE9B0000-0x000001CFAE9B2000-memory.dmp

Download

memory/4092-122-0x000001CFAE9B0000-0x000001CFAE9B2000-memory.dmp

Download

memory/4092-118-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Download

memory/4092-120-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Download

memory/4092-119-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads