2b6937e90b3f57eb3f26b8a3f50b86def03b2d4b3bc30d93e1af1c96656bb4da

General

Target
SecuriteInfo.com.Exploit.Siggen3.24634.19679.28268.xls
Size 118KB
Sample220111-xhgewshaej
SHA256 2b6937e90b3f57eb3f26b8a3f50b86def03b2d4b3bc30d93e1af1c96656bb4da
MD5 ca438f9de359c38ebfdc0906f0d7f7ba
SHA1 d64c6603cefeaede6bc849233314e9a964876a25
SHA512 cd6f1a983e0bcbb701195a0f2427235d5d0f9af90f0be69fe960919ef7f489fcf2784778660267586a83f0a2cf8aa149e2929b8022ea71cc87de692ff7dc1cf2
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
https://wordpressdes.vanzolini-gte.org.br/fundacaotelefonica.org.br/gAbC4QpJYI/

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	3788	456	rundll32.exe	68

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3788	rundll32.exe
3896	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Xbpztjoppzbqu\vrqt.jnb	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
456	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 456 wrote to memory of 3788	456	EXCEL.EXE	71
PID 456 wrote to memory of 3788	456	EXCEL.EXE	71
PID 456 wrote to memory of 3788	456	EXCEL.EXE	71
PID 3788 wrote to memory of 3896	3788	rundll32.exe	72
PID 3788 wrote to memory of 3896	3788	rundll32.exe	72
PID 3788 wrote to memory of 3896	3788	rundll32.exe	72
PID 3896 wrote to memory of 2108	3896	rundll32.exe	75
PID 3896 wrote to memory of 2108	3896	rundll32.exe	75
PID 3896 wrote to memory of 2108	3896	rundll32.exe	75
PID 2108 wrote to memory of 1028	2108	rundll32.exe	76
PID 2108 wrote to memory of 1028	2108	rundll32.exe	76
PID 2108 wrote to memory of 1028	2108	rundll32.exe	76

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.Siggen3.24634.19679.28268.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:456
- 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:3788
- - 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:3896
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Xbpztjoppzbqu\vrqt.jnb",oQvX
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2108
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Xbpztjoppzbqu\vrqt.jnb",DllRegisterServer
        5⤵
        
        PID:1028

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/456-118-0x00007FFE91410000-0x00007FFE91420000-memory.dmp

Download

memory/456-119-0x00007FFE91410000-0x00007FFE91420000-memory.dmp

Download

memory/456-120-0x000002BEE3510000-0x000002BEE3512000-memory.dmp

Download

memory/456-121-0x000002BEE3510000-0x000002BEE3512000-memory.dmp

Download

memory/456-122-0x000002BEE3510000-0x000002BEE3512000-memory.dmp

Download

memory/456-115-0x00007FFE91410000-0x00007FFE91420000-memory.dmp

Download

memory/456-117-0x00007FFE91410000-0x00007FFE91420000-memory.dmp

Download

memory/456-116-0x00007FFE91410000-0x00007FFE91420000-memory.dmp

Download

memory/2108-274-0x0000000002B50000-0x0000000002BFE000-memory.dmp

Download

memory/3788-269-0x00000000030B0000-0x00000000031FA000-memory.dmp

Download

memory/3896-272-0x00000000028E0000-0x0000000002A2A000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads