Overview

overview

10

Static

static

precept.scr

windows7_x64

10

precept.scr

windows10-2004_x64

10

Sharing

Copy URL
Twitter E-mail

General

  • Target

    296da6c6402442d49cfd43e9f9f643390ca2dc9f7430891d5fbbd49294d94d85

  • Size

    22KB

  • Sample

    220521-w8f2dabbe6

  • MD5

    a00557da80ec852a2247f08e2e52a0bc

  • SHA1

    5efced26a03dd507d200adcda2d3321c39af5db9

  • SHA256

    296da6c6402442d49cfd43e9f9f643390ca2dc9f7430891d5fbbd49294d94d85

  • SHA512

    b8cda06e2ca0522dd9448a9930512af112f935bfd0c5888155a83daadd26c7241e5b4b279129c30d03ed283aced1acd591e2a65bf7677bb1762cc96c9320217a

Score
10/10
guloaderdownloaderpersistence

Malware Config

Extracted

Family

guloader

C2

https://drive.google.com/uc?export=download&id=1K-CSSsJ1vvDwqmIKyP6iBjekVRzjCLpq

xor.base64

Targets

    • Target

      precept.scr

    • Size

      84KB

    • MD5

      36f2929edc1f6ad027a19baf60880ac3

    • SHA1

      141d9b90cb1b3826d7b95c7162e94a20305a8d6d

    • SHA256

      08361399bcfd6c87b301f7dd61be86d5eedf3013608d3cd98c818435bd43a724

    • SHA512

      69d111f44ccc0a10b04f2ad522ba8ce3401255e789ae47c277cf7230007fe7dfbb19da082a55bcff68b2daf50dc690434fd8b15b950d796dbd567ba5971092ae

    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