Overview

overview

10

Static

static

3

a1c86dc81d...18.exe

windows7-x64

10

a1c86dc81d...18.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    a1c86dc81df8c629410fa9970423016e_JaffaCakes118

  • Size

    2.0MB

  • Sample

    240612-xabjnsvgrd

  • MD5

    a1c86dc81df8c629410fa9970423016e

  • SHA1

    96bd00b2a79f00112e5f911019f140c95db19334

  • SHA256

    4ffe3bdfc6fe67298681315b83cef2513ad95b9b3e3162b9a5e3a27c44f26fe1

  • SHA512

    250b3b28e3e0dd15bdf1bc6443d1a6570d8ff917800b9e4d99b6c0f2d76361a7c4ec0a1b92ba19f9fa0f01399783d587445ae4e95e22c5f1d7aab0413ffabd3f

  • SSDEEP

    24576:f/y+xFOvI0vRcEg3QkQko24/NRwGi6oUrrke2RfhtTb8NO64tVaU/HpKINiC4tEr:C+xKFRM2Juf2OX6OftVaU/JNiNtE

Score
10/10
buerevasionloaderpersistence

Malware Config

Extracted

Family

buer

C2

http://bbload01.top/

http://bbload02.top/

Targets

    • Target

      a1c86dc81df8c629410fa9970423016e_JaffaCakes118

    • Size

      2.0MB

    • MD5

      a1c86dc81df8c629410fa9970423016e

    • SHA1

      96bd00b2a79f00112e5f911019f140c95db19334

    • SHA256

      4ffe3bdfc6fe67298681315b83cef2513ad95b9b3e3162b9a5e3a27c44f26fe1

    • SHA512

      250b3b28e3e0dd15bdf1bc6443d1a6570d8ff917800b9e4d99b6c0f2d76361a7c4ec0a1b92ba19f9fa0f01399783d587445ae4e95e22c5f1d7aab0413ffabd3f

    • SSDEEP

      24576:f/y+xFOvI0vRcEg3QkQko24/NRwGi6oUrrke2RfhtTb8NO64tVaU/HpKINiC4tEr:C+xKFRM2Juf2OX6OftVaU/JNiNtE

    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

    • Checks BIOS information in registry

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

    • Deletes itself

    • Executes dropped EXE

    • 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 v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1
T1547

Winlogon Helper DLL

1
T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Winlogon Helper DLL

1
T1547.004

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

Resource Development

Reconnaissance

Tasks