Overview

overview

10

Static

static

796e1936b0...a6.exe

windows7_x64

10

796e1936b0...a6.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6

  • Size

    1.7MB

  • Sample

    220625-jzxljsefb5

  • MD5

    d88f42698d2195f61bedb72ce885a758

  • SHA1

    a7854723c51857ab0e958108be18331aa3ff8fe6

  • SHA256

    796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6

  • SHA512

    6be3825bed91188e6729f70fec9ac182ca9ecbdcfef970643665a1ebba9c160cfb68ae3685ce38f455b729c63c8cd2da56bf32881fe0181a4729bfbedc22d752

Score
10/10
buerevasionloaderpersistence

Malware Config

Extracted

Family

buer

C2

http://lodddd01.info/

http://lodddd02.info/

cook5**gj____+,)diaj*

cook5**gj____+-)diaj*

Targets

    • Target

      796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6

    • Size

      1.7MB

    • MD5

      d88f42698d2195f61bedb72ce885a758

    • SHA1

      a7854723c51857ab0e958108be18331aa3ff8fe6

    • SHA256

      796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6

    • SHA512

      6be3825bed91188e6729f70fec9ac182ca9ecbdcfef970643665a1ebba9c160cfb68ae3685ce38f455b729c63c8cd2da56bf32881fe0181a4729bfbedc22d752

    Score
    10/10
    buerevasionloaderpersistence

    • 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.

      loader

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

      evasion

    • Executes dropped EXE

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Deletes itself

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

      evasion

    • Loads dropped DLL

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    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

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

1
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks