c2cb81db208398e070c47e7d03e76709142dec85ddaa985883536283a0acbb14

General

Target
SecuriteInfo.com.Heur.4848.30650.xlsm
Size 84KB
Sample220111-3m96naacer
SHA256 c2cb81db208398e070c47e7d03e76709142dec85ddaa985883536283a0acbb14
MD5 58b9285df2b833c202fe1679a8e5a1e5
SHA1 ff135ff65a575910b320ed6182d0e0d29d0faad1
SHA512 fd4a9912bba8b448bcf8bb13026923e4cfc328e06d8a4be2e22ca92dc2052daa20106ce12f72cb2e6d7014195b4c6fe224be87378c801ead64c85ca2f71af36c
MD5 SHA1 SHA512

Score

10^/10

suricata

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://yuanbinglun.com/www.yuanbinglun.com/L6kV1Jp9JInnxmaw5/

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	4012	680	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
40	3192	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
4012	rundll32.exe
2712	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Mrklzgatawtk\jgkbono.ifw	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
680	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3192	rundll32.exe
3192	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
680	EXCEL.EXE
680	EXCEL.EXE
680	EXCEL.EXE
680	EXCEL.EXE
680	EXCEL.EXE
680	EXCEL.EXE
680	EXCEL.EXE
680	EXCEL.EXE
680	EXCEL.EXE
680	EXCEL.EXE
680	EXCEL.EXE
680	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 680 wrote to memory of 4012	680	EXCEL.EXE	72
PID 680 wrote to memory of 4012	680	EXCEL.EXE	72
PID 680 wrote to memory of 4012	680	EXCEL.EXE	72
PID 4012 wrote to memory of 2712	4012	rundll32.exe	73
PID 4012 wrote to memory of 2712	4012	rundll32.exe	73
PID 4012 wrote to memory of 2712	4012	rundll32.exe	73
PID 2712 wrote to memory of 3432	2712	rundll32.exe	74
PID 2712 wrote to memory of 3432	2712	rundll32.exe	74
PID 2712 wrote to memory of 3432	2712	rundll32.exe	74
PID 3432 wrote to memory of 3192	3432	rundll32.exe	75
PID 3432 wrote to memory of 3192	3432	rundll32.exe	75
PID 3432 wrote to memory of 3192	3432	rundll32.exe	75

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Heur.4848.30650.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:680
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\adi.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:4012
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\adi.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:2712
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Mrklzgatawtk\jgkbono.ifw",jQieQlZqzpm
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3432
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Mrklzgatawtk\jgkbono.ifw",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:3192

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/680-118-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

memory/680-119-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

memory/680-120-0x0000020F236B0000-0x0000020F236B2000-memory.dmp

Download

memory/680-121-0x0000020F236B0000-0x0000020F236B2000-memory.dmp

Download

memory/680-122-0x0000020F236B0000-0x0000020F236B2000-memory.dmp

Download

memory/680-115-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

memory/680-117-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

memory/680-116-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads