fbc4a5db3ab48741c10a226dae4e2b64d924110962224bef57910478251cf3c7

General

Target
14834eabcde7eb6d9fe9854ebe7604f6.xls
Size 118KB
Sample220111-xs8l5aggf7
SHA256 fbc4a5db3ab48741c10a226dae4e2b64d924110962224bef57910478251cf3c7
MD5 14834eabcde7eb6d9fe9854ebe7604f6
SHA1 61fac3137aabc8de4e7473e39dc89ace7979983f
SHA512 66b01d90b709ded76610dbc43c36ce878fd7a42ab96b4c2dc068e7937f62b3c6cc59b55de2dd499fad4f1da858e74f8d2c936f7c6725beb907358436fd1ce184
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	1356	2056	rundll32.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
46	3760	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
1356	rundll32.exe
3656	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Xkrsjlmigki\abgfbipcexe.bdg	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
2056	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3760	rundll32.exe
3760	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2056 wrote to memory of 1356	2056	EXCEL.EXE	72
PID 2056 wrote to memory of 1356	2056	EXCEL.EXE	72
PID 2056 wrote to memory of 1356	2056	EXCEL.EXE	72
PID 1356 wrote to memory of 3656	1356	rundll32.exe	73
PID 1356 wrote to memory of 3656	1356	rundll32.exe	73
PID 1356 wrote to memory of 3656	1356	rundll32.exe	73
PID 3656 wrote to memory of 2156	3656	rundll32.exe	74
PID 3656 wrote to memory of 2156	3656	rundll32.exe	74
PID 3656 wrote to memory of 2156	3656	rundll32.exe	74
PID 2156 wrote to memory of 3760	2156	rundll32.exe	75
PID 2156 wrote to memory of 3760	2156	rundll32.exe	75
PID 2156 wrote to memory of 3760	2156	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\14834eabcde7eb6d9fe9854ebe7604f6.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2056
- 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:1356
- - 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:3656
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Xkrsjlmigki\abgfbipcexe.bdg",WuKUDKmG
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2156
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Xkrsjlmigki\abgfbipcexe.bdg",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:3760

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/2056-119-0x00007FF989EC0000-0x00007FF989ED0000-memory.dmp

Download

memory/2056-121-0x000001658F2A0000-0x000001658F2A2000-memory.dmp

Download

memory/2056-120-0x000001658F2A0000-0x000001658F2A2000-memory.dmp

Download

memory/2056-122-0x000001658F2A0000-0x000001658F2A2000-memory.dmp

Download

memory/2056-128-0x00007FF9863F0000-0x00007FF986400000-memory.dmp

Download

memory/2056-129-0x00007FF9863F0000-0x00007FF986400000-memory.dmp

Download

memory/2056-115-0x00007FF989EC0000-0x00007FF989ED0000-memory.dmp

Download

memory/2056-118-0x00007FF989EC0000-0x00007FF989ED0000-memory.dmp

Download

memory/2056-117-0x00007FF989EC0000-0x00007FF989ED0000-memory.dmp

Download

memory/2056-116-0x00007FF989EC0000-0x00007FF989ED0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads