b0250ebf28def9886afdab5cbe5c9cd3b073b54ad6b512a7d8aa7e0fe453cdb7

General

Target

b0250ebf28def9886afdab5cbe5c9cd3b073b54ad6b512a7d8aa7e0fe453cdb7.xls
Size

47KB
MD5

4b62a660d524be0108d60e34cf414aca
SHA1

1f020a6c98feead640bf5b02c701a265ac02cc1e
SHA256

b0250ebf28def9886afdab5cbe5c9cd3b073b54ad6b512a7d8aa7e0fe453cdb7
SHA512

0df7d2725fc4c18c97ad957ab6512396856a1b4f96867ca4b4d2efb129b64657c0d9d064464de1651e9fc1ef9f658e51c77b6ba3871bf4bce431b90a72438da6
SSDEEP

768:4DM52tfQXi8vgLZkTOHkQT51Vp6AwPdM8gQ6JT5X6DGwUdh+pqjeSLjcvLtzrxFW:462tfQXi8vgLZkTOHkQT51Vp6AwPe8gD

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://www.escueladecinemza.com.ar/_installation/IBlj/

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	3384	2800	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 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

pid	Process
2800	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2800	EXCEL.EXE
2800	EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

pid	Process
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2800 wrote to memory of 3384	2800	EXCEL.EXE	89
PID 2800 wrote to memory of 3384	2800	EXCEL.EXE	89

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\b0250ebf28def9886afdab5cbe5c9cd3b073b54ad6b512a7d8aa7e0fe453cdb7.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:2800
- C:\Windows\SYSTEM32\regsvr32.exe
  regsvr32.exe ..\wnrul.ocx
  2⤵
  - Process spawned unexpected child process
  PID:3384

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

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\b8ab77100df80ab2.customDestinations-ms

Filesize
4KB

MD5
26cd6f3ef56589c865ec5eecb48a13c0

SHA1
a74661edc214514f2ec27f1a861d9c82ff0846a3

SHA256
7e523d97e9df9249082cf18c5796aa7dbed2aa497a73f31abc15452fbb6c91ff

SHA512
f8363c4acb1136e4c6405742d7ba27369ca7b400d52332da81351cf7fd9ff47c14a1516571850f91463403998312b33bc2a737bb033214ba7812473d764c04a4

Download Submit
C:\Users\Admin\wnrul.ocx

Filesize
86KB

MD5
dfdb83bd3445e3f2ea46b104976c8d43

SHA1
78e1237f69e9ba18a68a2c72b6a78179fc01c29b

SHA256
76e4a6a2d7ade92678bdc5dd447199ce8f16496d32b36b000726053a89e89443

SHA512
6950cad2b1e7f9a20015ee358a44a7def9db96cb395c21a21fece6348e24cf4d307e10091b5f84edeb84368d9f435a82366ed992bcb372e078571a7b97cc328a

Download Submit
memory/2800-0-0x00007FFF75250000-0x00007FFF75260000-memory.dmp

Filesize
64KB

Download
memory/2800-12-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-9-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-8-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-7-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-6-0x00007FFF75250000-0x00007FFF75260000-memory.dmp

Filesize
64KB

Download
memory/2800-5-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-13-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-14-0x00007FFF731C0000-0x00007FFF731D0000-memory.dmp

Filesize
64KB

Download
memory/2800-10-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-3-0x00007FFFB526D000-0x00007FFFB526E000-memory.dmp

Filesize
4KB

Download
memory/2800-1-0x00007FFF75250000-0x00007FFF75260000-memory.dmp

Filesize
64KB

Download
memory/2800-11-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-16-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-17-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-18-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-15-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-19-0x00007FFF731C0000-0x00007FFF731D0000-memory.dmp

Filesize
64KB

Download
memory/2800-4-0x00007FFF75250000-0x00007FFF75260000-memory.dmp

Filesize
64KB

Download
memory/2800-41-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-42-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-43-0x00007FFFB51D0000-0x00007FFFB53C5000-memory.dmp

Filesize
2.0MB

Download
memory/2800-2-0x00007FFF75250000-0x00007FFF75260000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads