3d2ad015f60956cee32029cb7d6fee846f34a91d0f6dae2b68cfde31c99b4a77

General

Target
SecuriteInfo.com.Exploit.Siggen3.24636.16981.6035.xls
Size 113KB
Sample220111-17cpsahff2
SHA256 3d2ad015f60956cee32029cb7d6fee846f34a91d0f6dae2b68cfde31c99b4a77
MD5 cee9ddb3f651e5784f0d8d0fc07001bd
SHA1 50e7f1ebbafe2eaec454a4ce7fb809d190aab0d4
SHA512 47ca27eb568364ab3af3f57bd1cf2f7666670973dbc51d0e4e5408fa0a86406be4915ffa64bb8d9d8a6fe3a578d54bdca5e611fece7cb959d2d2faba6425718c
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	2992	2440	rundll32.exe	67

Blocklisted process makes network request 2 IoCs

flow	pid	Process
44	3052	rundll32.exe
45	3052	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2992	rundll32.exe
2940	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Hoiyffmwhmow\iokpjrhmshms.dsx	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\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	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
2440	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3052	rundll32.exe
3052	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2440	EXCEL.EXE
2440	EXCEL.EXE
2440	EXCEL.EXE
2440	EXCEL.EXE
2440	EXCEL.EXE
2440	EXCEL.EXE
2440	EXCEL.EXE
2440	EXCEL.EXE
2440	EXCEL.EXE
2440	EXCEL.EXE
2440	EXCEL.EXE
2440	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 2992	2440	EXCEL.EXE	70
PID 2440 wrote to memory of 2992	2440	EXCEL.EXE	70
PID 2440 wrote to memory of 2992	2440	EXCEL.EXE	70
PID 2992 wrote to memory of 2940	2992	rundll32.exe	71
PID 2992 wrote to memory of 2940	2992	rundll32.exe	71
PID 2992 wrote to memory of 2940	2992	rundll32.exe	71
PID 2940 wrote to memory of 3844	2940	rundll32.exe	72
PID 2940 wrote to memory of 3844	2940	rundll32.exe	72
PID 2940 wrote to memory of 3844	2940	rundll32.exe	72
PID 3844 wrote to memory of 3052	3844	rundll32.exe	73
PID 3844 wrote to memory of 3052	3844	rundll32.exe	73
PID 3844 wrote to memory of 3052	3844	rundll32.exe	73

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.Siggen3.24636.16981.6035.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2440
- 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:2992
- - 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:2940
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Hoiyffmwhmow\iokpjrhmshms.dsx",aOJgEEq
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3844
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Hoiyffmwhmow\iokpjrhmshms.dsx",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:3052

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/2440-121-0x00007FFFB7DE0000-0x00007FFFB7DF0000-memory.dmp

Download

memory/2440-123-0x000001371CFD0000-0x000001371CFD2000-memory.dmp

Download

memory/2440-122-0x000001371CFD0000-0x000001371CFD2000-memory.dmp

Download

memory/2440-124-0x000001371CFD0000-0x000001371CFD2000-memory.dmp

Download

memory/2440-130-0x00007FFFB7DE0000-0x00007FFFB7DF0000-memory.dmp

Download

memory/2440-118-0x00007FFFB7DE0000-0x00007FFFB7DF0000-memory.dmp

Download

memory/2440-120-0x00007FFFB7DE0000-0x00007FFFB7DF0000-memory.dmp

Download

memory/2440-119-0x00007FFFB7DE0000-0x00007FFFB7DF0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads