a598cd88d7fc4911786bb3a49f556bdc39d66faf40d4cc00f48ab241c4a8bcbe

General

Target

a598cd88d7fc4911786bb3a49f556bdc39d66faf40d4cc00f48ab241c4a8bcbe.xls
Size

47KB
MD5

8d90f5d2a192a97a0db03b2bb2dcf118
SHA1

86076223203c34fe561da496ae73f96e488b3d31
SHA256

a598cd88d7fc4911786bb3a49f556bdc39d66faf40d4cc00f48ab241c4a8bcbe
SHA512

3f0413de02a4243f23e25a95e853db49b7803eb852e3fb4024bb96989de4d473b70d0edb272a969b6f196f42832ae934628343f88cd9001909607856a2e71cac
SSDEEP

768:4DM52tfQXi8vgLZkTOHkQT51Vp6AwPdM8gQ6JT5X6DGwUdh+pqjeSLjcvLtzrxFm:462tfQXi8vgLZkTOHkQT51Vp6AwPe8gz

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.

Processes:

regsvr32.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	4428	4892	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

Processes:

EXCEL.EXE

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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 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

Processes:

EXCEL.EXE

pid	Process
4892	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid	Process
4892	EXCEL.EXE
4892	EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	Process
4892	EXCEL.EXE
4892	EXCEL.EXE
4892	EXCEL.EXE
4892	EXCEL.EXE
4892	EXCEL.EXE
4892	EXCEL.EXE
4892	EXCEL.EXE
4892	EXCEL.EXE
4892	EXCEL.EXE
4892	EXCEL.EXE
4892	EXCEL.EXE
4892	EXCEL.EXE
4892	EXCEL.EXE
4892	EXCEL.EXE

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

EXCEL.EXE

description	pid	Process	procid_target
PID 4892 wrote to memory of 4428	4892	EXCEL.EXE	95
PID 4892 wrote to memory of 4428	4892	EXCEL.EXE	95

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\a598cd88d7fc4911786bb3a49f556bdc39d66faf40d4cc00f48ab241c4a8bcbe.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:4892
- C:\Windows\SYSTEM32\regsvr32.exe
  regsvr32.exe ..\wnrul.ocx
  2⤵
  - Process spawned unexpected child process
  PID:4428

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
1KB

MD5
5452a6348664b3af2d84369c581bca30

SHA1
f463b029accb6499162160d8abf52b4ab1a29815

SHA256
95e692a5e81c46a2efef1386afb1a4d0934dc833ff10b2aa2ec585adcc2e2cf3

SHA512
a4ab3e9f98e4d95fbb6728309494065cdd5430b9a513439a3e1009e8d705bda625caa69b4df2b7bcd945b9c2550f8b91cc971fd52874e94128f48a37e1cbe7d0

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

Filesize
86KB

MD5
dfdb83bd3445e3f2ea46b104976c8d43

SHA1
78e1237f69e9ba18a68a2c72b6a78179fc01c29b

SHA256
76e4a6a2d7ade92678bdc5dd447199ce8f16496d32b36b000726053a89e89443

SHA512
6950cad2b1e7f9a20015ee358a44a7def9db96cb395c21a21fece6348e24cf4d307e10091b5f84edeb84368d9f435a82366ed992bcb372e078571a7b97cc328a

Download Submit
memory/4892-12-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-6-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-15-0x00007FF928160000-0x00007FF928170000-memory.dmp

Filesize
64KB

Download
memory/4892-2-0x00007FF92A5D0000-0x00007FF92A5E0000-memory.dmp

Filesize
64KB

Download
memory/4892-16-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-8-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-10-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-18-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-7-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-11-0x00007FF928160000-0x00007FF928170000-memory.dmp

Filesize
64KB

Download
memory/4892-1-0x00007FF96A5ED000-0x00007FF96A5EE000-memory.dmp

Filesize
4KB

Download
memory/4892-14-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-4-0x00007FF92A5D0000-0x00007FF92A5E0000-memory.dmp

Filesize
64KB

Download
memory/4892-3-0x00007FF92A5D0000-0x00007FF92A5E0000-memory.dmp

Filesize
64KB

Download
memory/4892-9-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-17-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-13-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-20-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-19-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-37-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-38-0x00007FF96A5ED000-0x00007FF96A5EE000-memory.dmp

Filesize
4KB

Download
memory/4892-39-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-43-0x00007FF96A550000-0x00007FF96A745000-memory.dmp

Filesize
2.0MB

Download
memory/4892-5-0x00007FF92A5D0000-0x00007FF92A5E0000-memory.dmp

Filesize
64KB

Download
memory/4892-0-0x00007FF92A5D0000-0x00007FF92A5E0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads