Overview

overview

10

Static

static

3

4f6928ac04...18.exe

windows7-x64

10

4f6928ac04...18.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    4f6928ac042fe087533e8d7f4fbc4b74_JaffaCakes118

  • Size

    1.6MB

  • Sample

    240517-lswrsacg28

  • MD5

    4f6928ac042fe087533e8d7f4fbc4b74

  • SHA1

    59cb8e3ed172b41351ae9a8a6e15cd7efdc0250c

  • SHA256

    ec5dde3e68cf7ed672be82433da49a7c44bb2c109956b2b29161e0b3f34b025e

  • SHA512

    efcf031b00d16a2fd406cbdc35ca8a1bcc6679fcd72c169e56c6231074fb7e74fe21ffb586970c48ad57090412c24caa15890f7bad44654c7f2deb39772401a9

  • SSDEEP

    49152:LbwBhGDF0hFkGTjE5aO4jxwk2mBXhWaMEC5jHxF:gaD+heG3MN5xNEC5P

Score
10/10
buerevasionloaderpersistence

Malware Config

Extracted

Family

buer

C2

http://lodddd01.info/

http://lodddd02.info/

Targets

    • Target

      4f6928ac042fe087533e8d7f4fbc4b74_JaffaCakes118

    • Size

      1.6MB

    • MD5

      4f6928ac042fe087533e8d7f4fbc4b74

    • SHA1

      59cb8e3ed172b41351ae9a8a6e15cd7efdc0250c

    • SHA256

      ec5dde3e68cf7ed672be82433da49a7c44bb2c109956b2b29161e0b3f34b025e

    • SHA512

      efcf031b00d16a2fd406cbdc35ca8a1bcc6679fcd72c169e56c6231074fb7e74fe21ffb586970c48ad57090412c24caa15890f7bad44654c7f2deb39772401a9

    • SSDEEP

      49152:LbwBhGDF0hFkGTjE5aO4jxwk2mBXhWaMEC5jHxF:gaD+heG3MN5xNEC5P

    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