Overview

overview

10

Static

static

Comprobant...df.exe

windows7_x64

10

Comprobant...df.exe

windows10_x64

10

Analysis

  • max time kernel
    144s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    21-01-2022 22:57

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General

  • Target

    Comprobante de transferencia.pdf.exe

  • Size

    48KB

  • MD5

    fc0557257080e207819d005d257833f8

  • SHA1

    5a7d76b52983a8babcfec637c0319a15c2dce22e

  • SHA256

    72b08b2bc289e7665a1701f07f6e366898ceb61fa289007187fded38834267f3

  • SHA512

    c036a1f635bf2adab66c2e29176cca3b1fde4f8319e1f09c562fef8aacf5ad99f61f8036ede90a10d86f6bf56eb67d36528780caa48f8ee8787b8a10e03eddd7

Score
10/10
guloaderdownloaderguloader

Malware Config

Extracted

Family

guloader

C2

https://drive.google.com/uc?export=download&id=185yfGKZexOdEd7mpzk2cg-0hQHnY6XWe

xor.base64

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

    downloaderguloader
  • Guloader Payload 2 IoCs
    guloader
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Comprobante de transferencia.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Comprobante de transferencia.pdf.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1596
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
      "C:\Users\Admin\AppData\Local\Temp\Comprobante de transferencia.pdf.exe"
      2⤵
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      PID:1212

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1
T1102

Impact

Replay Monitor

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Downloads

  • memory/1212-63-0x0000000000270000-0x0000000000370000-memory.dmp
    Filesize

    1024KB

    Download
  • memory/1212-64-0x0000000077BC0000-0x0000000077D69000-memory.dmp
    Filesize

    1.7MB

    Download
  • memory/1212-65-0x0000000077DA0000-0x0000000077F20000-memory.dmp
    Filesize

    1.5MB

    Download
  • memory/1596-57-0x0000000076001000-0x0000000076003000-memory.dmp
    Filesize

    8KB

    Download
  • memory/1596-58-0x0000000000320000-0x0000000000327000-memory.dmp
    Filesize

    28KB

    Download
  • memory/1596-59-0x0000000077BC0000-0x0000000077D69000-memory.dmp
    Filesize

    1.7MB

    Download
  • memory/1596-60-0x0000000077DA0000-0x0000000077F20000-memory.dmp
    Filesize

    1.5MB

    Download