dd596196539efab0f12895f9401a4e34806282933e3078be14c9a2608b45bd6d

General

Target
992839c2ac5f13469efcf01dae5d6bc9.xls
Size 113KB
Sample220111-tkmsxagbg9
SHA256 dd596196539efab0f12895f9401a4e34806282933e3078be14c9a2608b45bd6d
MD5 992839c2ac5f13469efcf01dae5d6bc9
SHA1 19794fdc9985878b7ecebe53a633b5f076d445d9
SHA512 a385d84531ea8d8117c19a202de89d0fff064e7101f6d56134ac52e9a950507c77bcc49a07814891881abaa949c82c8da5bd0c5db780e69d9709f6f4a2032dad
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://gaidov.bg/wp-includes/Ug/

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	2892	3496	rundll32.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
42	1424	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2892	rundll32.exe
2592	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Faalkhgq\ydkpz.gpd	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
3496	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1424	rundll32.exe
1424	rundll32.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
3496	EXCEL.EXE
3496	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3496 wrote to memory of 2892	3496	EXCEL.EXE	70
PID 3496 wrote to memory of 2892	3496	EXCEL.EXE	70
PID 3496 wrote to memory of 2892	3496	EXCEL.EXE	70
PID 2892 wrote to memory of 2592	2892	rundll32.exe	71
PID 2892 wrote to memory of 2592	2892	rundll32.exe	71
PID 2892 wrote to memory of 2592	2892	rundll32.exe	71
PID 2592 wrote to memory of 2688	2592	rundll32.exe	73
PID 2592 wrote to memory of 2688	2592	rundll32.exe	73
PID 2592 wrote to memory of 2688	2592	rundll32.exe	73
PID 2688 wrote to memory of 1424	2688	rundll32.exe	74
PID 2688 wrote to memory of 1424	2688	rundll32.exe	74
PID 2688 wrote to memory of 1424	2688	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\992839c2ac5f13469efcf01dae5d6bc9.xls"
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:3496
- 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:2892
- - 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:2592
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Faalkhgq\ydkpz.gpd",igPX
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2688
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Faalkhgq\ydkpz.gpd",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:1424

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/3496-118-0x00007FFF65860000-0x00007FFF65870000-memory.dmp

Download

memory/3496-122-0x000002958D090000-0x000002958D092000-memory.dmp

Download

memory/3496-121-0x000002958D090000-0x000002958D092000-memory.dmp

Download

memory/3496-120-0x000002958D090000-0x000002958D092000-memory.dmp

Download

memory/3496-119-0x00007FFF65860000-0x00007FFF65870000-memory.dmp

Download

memory/3496-115-0x00007FFF65860000-0x00007FFF65870000-memory.dmp

Download

memory/3496-117-0x00007FFF65860000-0x00007FFF65870000-memory.dmp

Download

memory/3496-116-0x00007FFF65860000-0x00007FFF65870000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads