a91cc2db66258ad421aae2e7e7afc72c50379ab3b75c58f3dc8a359e5cb48914

General

Target

a91cc2db66258ad421aae2e7e7afc72c50379ab3b75c58f3dc8a359e5cb48914.xls
Size

95KB
MD5

6e411631d09ab219547744da4f1e1063
SHA1

aec093d312abfa638f9d46f42bfe51467e69f70a
SHA256

a91cc2db66258ad421aae2e7e7afc72c50379ab3b75c58f3dc8a359e5cb48914
SHA512

bf2bf1555b4b8a9e3eb32eb723abade3b7f879be173eefb3c697ac8082442568a566af42608ec27706fd9605031f05d76728e1c6b1232eabc6fa4ab2baf64d0a
SSDEEP

1536:iFKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgBHuS4hcTO97v7UYdEJm8q:cKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgC

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://atperson.com/campusvirtual/3aAaeSKPaURF/

xlm40.dropper

https://buffetmazzi.com.br/ckfinder/i/

xlm40.dropper

http://atici.net/c/MgEC/

xlm40.dropper

http://www.birebiregitim.net/wp-includes/f/

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	2668	3956	regsvr32.exe	81
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	5048	3956	regsvr32.exe	81
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	608	3956	regsvr32.exe	81
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3820	3956	regsvr32.exe	81

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
3956	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
3956	EXCEL.EXE
3956	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3956	EXCEL.EXE
3956	EXCEL.EXE
3956	EXCEL.EXE
3956	EXCEL.EXE
3956	EXCEL.EXE
3956	EXCEL.EXE
3956	EXCEL.EXE
3956	EXCEL.EXE
3956	EXCEL.EXE
3956	EXCEL.EXE
3956	EXCEL.EXE
3956	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3956 wrote to memory of 2668	3956	EXCEL.EXE	88
PID 3956 wrote to memory of 2668	3956	EXCEL.EXE	88
PID 3956 wrote to memory of 5048	3956	EXCEL.EXE	90
PID 3956 wrote to memory of 5048	3956	EXCEL.EXE	90
PID 3956 wrote to memory of 608	3956	EXCEL.EXE	91
PID 3956 wrote to memory of 608	3956	EXCEL.EXE	91
PID 3956 wrote to memory of 3820	3956	EXCEL.EXE	92
PID 3956 wrote to memory of 3820	3956	EXCEL.EXE	92

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\a91cc2db66258ad421aae2e7e7afc72c50379ab3b75c58f3dc8a359e5cb48914.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:3956
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\soci1.ocx
  2⤵
  - Process spawned unexpected child process
  PID:2668
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\soci2.ocx
  2⤵
  - Process spawned unexpected child process
  PID:5048
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\soci3.ocx
  2⤵
  - Process spawned unexpected child process
  PID:608
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\soci4.ocx
  2⤵
  - Process spawned unexpected child process
  PID:3820

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/3956-3-0x00007FFD000F0000-0x00007FFD00100000-memory.dmp

Filesize
64KB

Download
memory/3956-4-0x00007FFD000F0000-0x00007FFD00100000-memory.dmp

Filesize
64KB

Download
memory/3956-5-0x00007FFD000F0000-0x00007FFD00100000-memory.dmp

Filesize
64KB

Download
memory/3956-2-0x00007FFD000F0000-0x00007FFD00100000-memory.dmp

Filesize
64KB

Download
memory/3956-7-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-6-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-1-0x00007FFD4010D000-0x00007FFD4010E000-memory.dmp

Filesize
4KB

Download
memory/3956-0-0x00007FFD000F0000-0x00007FFD00100000-memory.dmp

Filesize
64KB

Download
memory/3956-10-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-11-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-13-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-14-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-12-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-16-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-15-0x00007FFCFE090000-0x00007FFCFE0A0000-memory.dmp

Filesize
64KB

Download
memory/3956-18-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-19-0x00007FFCFE090000-0x00007FFCFE0A0000-memory.dmp

Filesize
64KB

Download
memory/3956-17-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-9-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-8-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-41-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-42-0x00007FFD4010D000-0x00007FFD4010E000-memory.dmp

Filesize
4KB

Download
memory/3956-43-0x00007FFD40070000-0x00007FFD40265000-memory.dmp

Filesize
2.0MB

Download
memory/3956-47-0x00007FFD40070000-0x00007FFD40265000-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