b9fd23efb7ba41c3d2b8d7047a74cf9f94899f77cd3cbae124b4d0e0b93ada4e

General

Target

b9fd23efb7ba41c3d2b8d7047a74cf9f94899f77cd3cbae124b4d0e0b93ada4e.xls
Size

95KB
MD5

b7c8f4b666da9232b8a1af602f8eab37
SHA1

b57ce08cbefcb92abd6017a661c93605fa49e0be
SHA256

b9fd23efb7ba41c3d2b8d7047a74cf9f94899f77cd3cbae124b4d0e0b93ada4e
SHA512

a74382c93fbc9ec0e2d59618363d5eb244815b18fd8bd4ca068df6da703238d736d3d99a26277fd5215b14028907bed3a3eb58dbec309b8ccafc541b0a07c4c0
SSDEEP

1536:iFKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgBHuS4hcTO97v7UYdEJmAq:cKpb8rGYrMPe3q7Q0XV5xtezEsi8/dg+

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.

Processes:

regsvr32.exeregsvr32.exeregsvr32.exeregsvr32.exe

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	224	1728	regsvr32.exe	80
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3240	1728	regsvr32.exe	80
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1792	1728	regsvr32.exe	80
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3952	1728	regsvr32.exe	80

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

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXE

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid	Process
1728	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid	Process
1728	EXCEL.EXE
1728	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	Process
1728	EXCEL.EXE
1728	EXCEL.EXE
1728	EXCEL.EXE
1728	EXCEL.EXE
1728	EXCEL.EXE
1728	EXCEL.EXE
1728	EXCEL.EXE
1728	EXCEL.EXE
1728	EXCEL.EXE
1728	EXCEL.EXE
1728	EXCEL.EXE
1728	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXE

description	pid	Process	procid_target
PID 1728 wrote to memory of 224	1728	EXCEL.EXE	87
PID 1728 wrote to memory of 224	1728	EXCEL.EXE	87
PID 1728 wrote to memory of 3240	1728	EXCEL.EXE	89
PID 1728 wrote to memory of 3240	1728	EXCEL.EXE	89
PID 1728 wrote to memory of 1792	1728	EXCEL.EXE	90
PID 1728 wrote to memory of 1792	1728	EXCEL.EXE	90
PID 1728 wrote to memory of 3952	1728	EXCEL.EXE	91
PID 1728 wrote to memory of 3952	1728	EXCEL.EXE	91

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\b9fd23efb7ba41c3d2b8d7047a74cf9f94899f77cd3cbae124b4d0e0b93ada4e.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:1728
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\soci1.ocx
  2⤵
  - Process spawned unexpected child process
  PID:224
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\soci2.ocx
  2⤵
  - Process spawned unexpected child process
  PID:3240
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\soci3.ocx
  2⤵
  - Process spawned unexpected child process
  PID:1792
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\soci4.ocx
  2⤵
  - Process spawned unexpected child process
  PID:3952

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/1728-0-0x00007FFE2AED0000-0x00007FFE2AEE0000-memory.dmp

Filesize
64KB

Download
memory/1728-3-0x00007FFE6AEED000-0x00007FFE6AEEE000-memory.dmp

Filesize
4KB

Download
memory/1728-1-0x00007FFE2AED0000-0x00007FFE2AEE0000-memory.dmp

Filesize
64KB

Download
memory/1728-4-0x00007FFE2AED0000-0x00007FFE2AEE0000-memory.dmp

Filesize
64KB

Download
memory/1728-2-0x00007FFE2AED0000-0x00007FFE2AEE0000-memory.dmp

Filesize
64KB

Download
memory/1728-8-0x00007FFE6AE50000-0x00007FFE6B045000-memory.dmp

Filesize
2.0MB

Download
memory/1728-7-0x00007FFE6AE50000-0x00007FFE6B045000-memory.dmp

Filesize
2.0MB

Download
memory/1728-6-0x00007FFE2AED0000-0x00007FFE2AEE0000-memory.dmp

Filesize
64KB

Download
memory/1728-5-0x00007FFE6AE50000-0x00007FFE6B045000-memory.dmp

Filesize
2.0MB

Download
memory/1728-12-0x00007FFE6AE50000-0x00007FFE6B045000-memory.dmp

Filesize
2.0MB

Download
memory/1728-11-0x00007FFE6AE50000-0x00007FFE6B045000-memory.dmp

Filesize
2.0MB

Download
memory/1728-10-0x00007FFE6AE50000-0x00007FFE6B045000-memory.dmp

Filesize
2.0MB

Download
memory/1728-13-0x00007FFE28620000-0x00007FFE28630000-memory.dmp

Filesize
64KB

Download
memory/1728-9-0x00007FFE6AE50000-0x00007FFE6B045000-memory.dmp

Filesize
2.0MB

Download
memory/1728-14-0x00007FFE28620000-0x00007FFE28630000-memory.dmp

Filesize
64KB

Download
memory/1728-44-0x00007FFE6AE50000-0x00007FFE6B045000-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