Overview

overview

10

Static

static

6647fa3e5d...80.doc

windows7_x64

10

6647fa3e5d...80.doc

windows10-2004_x64

10

Sharing

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General

  • Target

    6647fa3e5d61d3eb83c211bbce13d04b0cc9af8eb76acaf321b2c47222f83880

  • Size

    640KB

  • Sample

    220131-19wknsdcf5

  • MD5

    23b8e03d5f5b6f906006e43047e78ec1

  • SHA1

    3cf86c620c188f02db1ddcce4b9552c4f2bd4dd4

  • SHA256

    6647fa3e5d61d3eb83c211bbce13d04b0cc9af8eb76acaf321b2c47222f83880

  • SHA512

    800fb8c37fb979b8b93796d2532c8cffc6e09a8586b62cd18bf424f8537e3bffab9a73718e323b6a74e7df09a2d44fb9b91757e405c41ed16a945d3fb494bfd2

Score
10/10
guloaderdownloaderpersistence

Malware Config

Extracted

Family

guloader

C2

https://drive.google.com/uc?export=download&id=1rZBJJ1UlUEUL4ybev4yCU57iLG3wWr5F

xor.base64

Targets

    • Target

      6647fa3e5d61d3eb83c211bbce13d04b0cc9af8eb76acaf321b2c47222f83880

    • Size

      640KB

    • MD5

      23b8e03d5f5b6f906006e43047e78ec1

    • SHA1

      3cf86c620c188f02db1ddcce4b9552c4f2bd4dd4

    • SHA256

      6647fa3e5d61d3eb83c211bbce13d04b0cc9af8eb76acaf321b2c47222f83880

    • SHA512

      800fb8c37fb979b8b93796d2532c8cffc6e09a8586b62cd18bf424f8537e3bffab9a73718e323b6a74e7df09a2d44fb9b91757e405c41ed16a945d3fb494bfd2

    Score
    10/10
    guloaderdownloaderpersistence

    • Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

      downloaderguloader

    • Executes dropped EXE

    • Sets service image path in registry

      persistence

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

2
T1060

Privilege Escalation

Defense Evasion

Modify Registry

3
T1112

Credential Access

Discovery

Query Registry

3
T1012

System Information Discovery

4
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1
T1102

Impact

Tasks