Overview

overview

10

Static

static

scan_12052020.exe

windows7_x64

10

scan_12052020.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    3eed869077fe1731bf9d92900cf612e64eab726136ccf1030f0395351a0377f2

  • Size

    21KB

  • Sample

    220521-w8jghaedfr

  • MD5

    7b988452dc108fcc197703499af8acb1

  • SHA1

    be96415211c6b8362c9bba2caea68198506fef07

  • SHA256

    3eed869077fe1731bf9d92900cf612e64eab726136ccf1030f0395351a0377f2

  • SHA512

    00fc2ab4dc1b43b1906605fe7e2636fb1efbdf3512f72d0cad03a2a4484790a37642784ad4c19213583356600ceaaf83791b57c6379c9bd79b024470f458c3d3

Score
10/10
guloaderdownloaderpersistence

Malware Config

Extracted

Family

guloader

C2

https://drive.google.com/uc?export=download&id=1wilQBcUq3xvhUQ_LwuH33VNutalqMFZH

xor.base64

Targets

    • Target

      scan_12052020.bat

    • Size

      88KB

    • MD5

      9f883705429b72c4e01d9c2fcfb284b8

    • SHA1

      d91f1f721e2248a60c2a69cbd6eb27efe43b86ba

    • SHA256

      e66f28f19fd4c89cbfbea489fa12cad084b07d722fb8111650a8128ee75cc061

    • SHA512

      1d32bcfa751ff4714640916364f3b4f5a508db89b4acfe492dd550b9c468840e7e27fe20b58db7dbf895703a38e30d2ffd93a1b1f4e848de9db3cbb54e2a9480

    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