a06c899c395e67e8d9cf518b134cab0f77bdc50f8090ea40dd168c3913bfd3bf

General

Target

a06c899c395e67e8d9cf518b134cab0f77bdc50f8090ea40dd168c3913bfd3bf.xls
Size

80KB
MD5

6cef783310b37e3c29c02679cb3f68f9
SHA1

a681ad578bd865fa5ee239c7f92965c9a40cffb8
SHA256

a06c899c395e67e8d9cf518b134cab0f77bdc50f8090ea40dd168c3913bfd3bf
SHA512

77b2b2e24e73328deee1000eb7ab6576c795eb33d29ffe49bb40e0bf44efb1a55800e919d840560d714ddc25358333abdbe8ad948c21565b7201ad2e92c5fdb3
SSDEEP

1536:UTOKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgQbHuS4VcTO9/r7UYdEJep:UaKpb8rGYrMPe3q7Q0XV5xtezEsi8/de

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://www.boraintercambios.com.br/wp-includes/AN4ixiH4Th/

xlm40.dropper

https://brigadir.com/bkp/SwrVs4yU/

xlm40.dropper

http://handboog6.nl/META-INF/f/

xlm40.dropper

http://brb-ljubuski.com/wp-content/2MODCk0UZasTCL6tm/

Signatures

Process spawned unexpected child process 4 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	1312	3668	regsvr32.exe	82
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	376	3668	regsvr32.exe	82
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3752	3668	regsvr32.exe	82
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3360	3668	regsvr32.exe	82

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
3668	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
3668	EXCEL.EXE
3668	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3668	EXCEL.EXE
3668	EXCEL.EXE
3668	EXCEL.EXE
3668	EXCEL.EXE
3668	EXCEL.EXE
3668	EXCEL.EXE
3668	EXCEL.EXE
3668	EXCEL.EXE
3668	EXCEL.EXE
3668	EXCEL.EXE
3668	EXCEL.EXE
3668	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3668 wrote to memory of 1312	3668	EXCEL.EXE	87
PID 3668 wrote to memory of 1312	3668	EXCEL.EXE	87
PID 3668 wrote to memory of 376	3668	EXCEL.EXE	88
PID 3668 wrote to memory of 376	3668	EXCEL.EXE	88
PID 3668 wrote to memory of 3752	3668	EXCEL.EXE	89
PID 3668 wrote to memory of 3752	3668	EXCEL.EXE	89
PID 3668 wrote to memory of 3360	3668	EXCEL.EXE	90
PID 3668 wrote to memory of 3360	3668	EXCEL.EXE	90

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\a06c899c395e67e8d9cf518b134cab0f77bdc50f8090ea40dd168c3913bfd3bf.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:3668
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\cui1.ocx
  2⤵
  - Process spawned unexpected child process
  PID:1312
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\cui2.ocx
  2⤵
  - Process spawned unexpected child process
  PID:376
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\cui3.ocx
  2⤵
  - Process spawned unexpected child process
  PID:3752
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\cui4.ocx
  2⤵
  - Process spawned unexpected child process
  PID:3360

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/3668-0-0x00007FFC4E3AD000-0x00007FFC4E3AE000-memory.dmp

Filesize
4KB

Download
memory/3668-1-0x00007FFC0E390000-0x00007FFC0E3A0000-memory.dmp

Filesize
64KB

Download
memory/3668-2-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download
memory/3668-4-0x00007FFC0E390000-0x00007FFC0E3A0000-memory.dmp

Filesize
64KB

Download
memory/3668-5-0x00007FFC0E390000-0x00007FFC0E3A0000-memory.dmp

Filesize
64KB

Download
memory/3668-3-0x00007FFC0E390000-0x00007FFC0E3A0000-memory.dmp

Filesize
64KB

Download
memory/3668-6-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download
memory/3668-12-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download
memory/3668-13-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download
memory/3668-11-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download
memory/3668-10-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download
memory/3668-9-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download
memory/3668-8-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download
memory/3668-7-0x00007FFC0E390000-0x00007FFC0E3A0000-memory.dmp

Filesize
64KB

Download
memory/3668-14-0x00007FFC0C100000-0x00007FFC0C110000-memory.dmp

Filesize
64KB

Download
memory/3668-15-0x00007FFC0C100000-0x00007FFC0C110000-memory.dmp

Filesize
64KB

Download
memory/3668-25-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download
memory/3668-26-0x00007FFC4E3AD000-0x00007FFC4E3AE000-memory.dmp

Filesize
4KB

Download
memory/3668-27-0x00007FFC4E310000-0x00007FFC4E505000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads