Overview

overview

10

Static

static

e212e5bc42...a1.exe

windows7_x64

10

e212e5bc42...a1.exe

windows10_x64

10

Sharing

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General

  • Target

    DocumentPreview.bin.zip

  • Size

    92KB

  • Sample

    200708-4r5kakfwnj

  • MD5

    e82561a4b93590db8de569c1b18476cd

  • SHA1

    a0c56d31d3d48a9387044fdfaa19d9467cbf5e04

  • SHA256

    6c870d3a5abad32d70b0599de0715e146228141243ac81066b99d77a9d315ce1

  • SHA512

    b7b5cdd6cbec5a84c53cd7c6bc052e3bc3b8cb073e7cc0c7cd25d9ea69989430046216b47cb9c713308ee5306cc0b4b234cce3804d72884457ed4ad3d6fba201

Score
10/10
buerloaderpersistence

Malware Config

Extracted

Family

buer

C2

https://162.244.81.87/

http://162.244.81.87:8080/

Targets

    • Target

      e212e5bc428a0bca4615205f07c10d4e57dc881a2f32a9b8aeec040169435aa1

    • Size

      146KB

    • MD5

      db3c2530d727bac602e6c41cb3e60562

    • SHA1

      0d62d5a5fba84c1e826591f27892466a1cd59257

    • SHA256

      e212e5bc428a0bca4615205f07c10d4e57dc881a2f32a9b8aeec040169435aa1

    • SHA512

      03e25d32a262c88ec2cf9303b7835da93b321a1d2a092531c96df8d95065944250f63c075792ca72b6d2a12d60c492782ba516712fbca0bf3b0239477b6b06e8

    Score
    10/10
    buerloaderpersistence

    • Buer

      Buer is a new modular loader first seen in August 2019.

      loaderbuer

    • Modifies WinLogon for persistence

      persistence

    • Buer Loader

      Detects Buer loader in memory or disk.

    • Executes dropped EXE

    • Deletes itself

    • Loads dropped DLL

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1
T1004

Privilege Escalation

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks