a43e422bf49682cd2dd5c53f5e3c8b8712c76cd9f082309e92decc55f0f8f92e

General

Target
SecuriteInfo.com.Exploit.Siggen3.24636.10099.1305.xls
Size 113KB
Sample220111-17cpsahfe9
SHA256 a43e422bf49682cd2dd5c53f5e3c8b8712c76cd9f082309e92decc55f0f8f92e
MD5 f99be384d572f9f00d4466e2afcc1cd5
SHA1 426f5b48dacd22376470e270434590d9e94063c2
SHA512 811eb771ed03d54a9cb50ad5eb2dbd0f3a0f18c19354a6b9d55326284a89cb46b231c5f51efe97856a231ef24495f7e300e7704567a1893a12219e39ff0f8df3
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	2064	2784	rundll32.exe	67

Blocklisted process makes network request 2 IoCs

flow	pid	Process
43	3216	rundll32.exe
44	3216	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2064	rundll32.exe
2932	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Dliygxak\fjftfjc.mpd	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2784	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3216	rundll32.exe
3216	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2784	EXCEL.EXE
2784	EXCEL.EXE
2784	EXCEL.EXE
2784	EXCEL.EXE
2784	EXCEL.EXE
2784	EXCEL.EXE
2784	EXCEL.EXE
2784	EXCEL.EXE
2784	EXCEL.EXE
2784	EXCEL.EXE
2784	EXCEL.EXE
2784	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2784 wrote to memory of 2064	2784	EXCEL.EXE	71
PID 2784 wrote to memory of 2064	2784	EXCEL.EXE	71
PID 2784 wrote to memory of 2064	2784	EXCEL.EXE	71
PID 2064 wrote to memory of 2932	2064	rundll32.exe	72
PID 2064 wrote to memory of 2932	2064	rundll32.exe	72
PID 2064 wrote to memory of 2932	2064	rundll32.exe	72
PID 2932 wrote to memory of 3192	2932	rundll32.exe	73
PID 2932 wrote to memory of 3192	2932	rundll32.exe	73
PID 2932 wrote to memory of 3192	2932	rundll32.exe	73
PID 3192 wrote to memory of 3216	3192	rundll32.exe	74
PID 3192 wrote to memory of 3216	3192	rundll32.exe	74
PID 3192 wrote to memory of 3216	3192	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\SecuriteInfo.com.Exploit.Siggen3.24636.10099.1305.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2784
- 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:2064
- - 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:2932
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Dliygxak\fjftfjc.mpd",nrIqzQffbQAW
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3192
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Dliygxak\fjftfjc.mpd",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:3216

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/2784-121-0x00007FFD79DC0000-0x00007FFD79DD0000-memory.dmp

Download

memory/2784-124-0x000001D82D3F0000-0x000001D82D3F2000-memory.dmp

Download

memory/2784-123-0x000001D82D3F0000-0x000001D82D3F2000-memory.dmp

Download

memory/2784-125-0x000001D82D3F0000-0x000001D82D3F2000-memory.dmp

Download

memory/2784-122-0x00007FFD79DC0000-0x00007FFD79DD0000-memory.dmp

Download

memory/2784-118-0x00007FFD79DC0000-0x00007FFD79DD0000-memory.dmp

Download

memory/2784-120-0x00007FFD79DC0000-0x00007FFD79DD0000-memory.dmp

Download

memory/2784-119-0x00007FFD79DC0000-0x00007FFD79DD0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads