24160ff88a8c4ee8d12c4cad09dbd7e744c2bf1bfd24b636cb436cb047d3324d

General

Target
SecuriteInfo.com.Exploit.Siggen3.24636.1341.1611.xls
Size 113KB
Sample220111-17cpsahfe7
SHA256 24160ff88a8c4ee8d12c4cad09dbd7e744c2bf1bfd24b636cb436cb047d3324d
MD5 f32f4a9fcd39de6f0cc96c435da7b1f5
SHA1 3db0e3cdef945b6055f09e299d4f1b8d944a019d
SHA512 75ac3afc092b30089beabfce97118c9383408740ea2dccd65ee03de24937e699e0974b256170ab723597b2930d1ee6ca79bcecebe5ec2e7de88b0218b436e267
MD5 SHA1 SHA512

Score

10^/10

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	2308	668	rundll32.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
43	3876	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2308	rundll32.exe
1760	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Cpoevhddob\wyltjcgq.dxm	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
668	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3876	rundll32.exe
3876	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
668	EXCEL.EXE
668	EXCEL.EXE
668	EXCEL.EXE
668	EXCEL.EXE
668	EXCEL.EXE
668	EXCEL.EXE
668	EXCEL.EXE
668	EXCEL.EXE
668	EXCEL.EXE
668	EXCEL.EXE
668	EXCEL.EXE
668	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 668 wrote to memory of 2308	668	EXCEL.EXE	72
PID 668 wrote to memory of 2308	668	EXCEL.EXE	72
PID 668 wrote to memory of 2308	668	EXCEL.EXE	72
PID 2308 wrote to memory of 1760	2308	rundll32.exe	73
PID 2308 wrote to memory of 1760	2308	rundll32.exe	73
PID 2308 wrote to memory of 1760	2308	rundll32.exe	73
PID 1760 wrote to memory of 3380	1760	rundll32.exe	74
PID 1760 wrote to memory of 3380	1760	rundll32.exe	74
PID 1760 wrote to memory of 3380	1760	rundll32.exe	74
PID 3380 wrote to memory of 3876	3380	rundll32.exe	75
PID 3380 wrote to memory of 3876	3380	rundll32.exe	75
PID 3380 wrote to memory of 3876	3380	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.Exploit.Siggen3.24636.1341.1611.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:668
- 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:2308
- - 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:1760
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Cpoevhddob\wyltjcgq.dxm",UjepcEjHwN
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3380
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Cpoevhddob\wyltjcgq.dxm",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:3876

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/668-118-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Download

memory/668-119-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Download

memory/668-120-0x0000017D29780000-0x0000017D29782000-memory.dmp

Download

memory/668-121-0x0000017D29780000-0x0000017D29782000-memory.dmp

Download

memory/668-122-0x0000017D29780000-0x0000017D29782000-memory.dmp

Download

memory/668-115-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Download

memory/668-117-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Download

memory/668-116-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads