Overview

overview

10

Static

static

PI-BL_SHIP...NT.scr

windows7_x64

10

PI-BL_SHIP...NT.scr

windows10-2004_x64

10

Sharing

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General

  • Target

    e821b5d7800df3d0049b41d6c33997b3d710d3b37801704bd2823cc621a678b8

  • Size

    58KB

  • Sample

    220521-w8b3esedfl

  • MD5

    72e478f8aec32822709260549d0ec7a5

  • SHA1

    3f62e2a22125bbb27ca9f75915162639d04cfb81

  • SHA256

    e821b5d7800df3d0049b41d6c33997b3d710d3b37801704bd2823cc621a678b8

  • SHA512

    72f3c2281e30f8ded11009d941e66e8ef79c588a1186fe551f1c8811c6f67626f5cd3f0707254f5f42f094c6a3b8b173871e93f4ba206b21df4ec43660e7155c

Score
10/10
guloaderdownloaderpersistence

Malware Config

Extracted

Family

guloader

C2

https://drive.google.com/uc?export=download&id=1nWJYNb6dnLoBCQ2sKeUXLNIMEr6vOra4

xor.base64

Targets

    • Target

      PI-BL_SHIPPING DOCUMENT.scr

    • Size

      180KB

    • MD5

      3768fe51238c141f42cab373c8135963

    • SHA1

      fb34281e91b8ec537a438e66f927009da72b07a3

    • SHA256

      72df3f9a494ac0d849ea6ba3917dfc37d7275f170f01348d3fd2ad77fb3d601d

    • SHA512

      fb7d29cfc865e2b07c1a21a62b6bdad89c32472ca434be1489333b2c8425765a1edab2a067b7c259e5536375ce9a72cff0b06b242bf2a4dbc9cb70521eceb06a

    Score
    10/10
    guloaderdownloaderpersistence

    • Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

      downloaderguloader

    • Executes dropped EXE

    • Checks QEMU agent state file

      Checks state file used by QEMU agent, possibly to detect virtualization.

    • 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

1
T1060

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

2
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1
T1102

Impact

Tasks