Analysis

  • max time kernel
    93s
  • max time network
    98s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/06/2024, 03:22 UTC

General

  • Target

    efsbar.dll

  • Size

    149KB

  • MD5

    26eccc32791911ccdfe0aec05f733cf8

  • SHA1

    cf0ffd6ee73c6dcb7cd52f4a863b6a5e44c29cbd

  • SHA256

    b4f5d03f1649f2631e122dba48a18e3ee705d073ce5800bda90730d0ad6a35c1

  • SHA512

    6841d08827476416bdc8ee2a224c0f2aaa8827acc32a78e1ecd3fecd796fadc2fc4aaf78af11f9e14a6ffcbc70bf7205c482f34a36ec07d3cc412d45d62cdf35

  • SSDEEP

    1536:Wr4H2HeDqt8Q7h3fKHiJdbYBsPV30tgyFicvjRvNLMzuH8UkUYjSzgUSYez2eJIy:WfHe68G3mOZxV3WgSZFCzuHMxrUnu

Score
1/10

Malware Config

Signatures

  • Modifies registry class 64 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\efsbar.dll
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2916
    • C:\Windows\SysWOW64\regsvr32.exe
      /s C:\Users\Admin\AppData\Local\Temp\efsbar.dll
      2⤵
      • Modifies registry class
      PID:4588

Network

  • flag-us
    DNS
    232.168.11.51.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    232.168.11.51.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    8.8.8.8.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    8.8.8.8.in-addr.arpa
    IN PTR
    Response
    8.8.8.8.in-addr.arpa
    IN PTR
    dnsgoogle
  • flag-us
    DNS
    172.214.232.199.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    172.214.232.199.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    4.159.190.20.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    4.159.190.20.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    97.17.167.52.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    97.17.167.52.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    241.150.49.20.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    241.150.49.20.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    183.59.114.20.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    183.59.114.20.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    15.164.165.52.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    15.164.165.52.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    107.12.20.2.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    107.12.20.2.in-addr.arpa
    IN PTR
    Response
    107.12.20.2.in-addr.arpa
    IN PTR
    a2-20-12-107deploystaticakamaitechnologiescom
  • flag-us
    DNS
    172.210.232.199.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    172.210.232.199.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    31.243.111.52.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    31.243.111.52.in-addr.arpa
    IN PTR
    Response
No results found
  • 8.8.8.8:53
    232.168.11.51.in-addr.arpa
    dns
    72 B
    158 B
    1
    1

    DNS Request

    232.168.11.51.in-addr.arpa

  • 8.8.8.8:53
    8.8.8.8.in-addr.arpa
    dns
    66 B
    90 B
    1
    1

    DNS Request

    8.8.8.8.in-addr.arpa

  • 8.8.8.8:53
    172.214.232.199.in-addr.arpa
    dns
    74 B
    128 B
    1
    1

    DNS Request

    172.214.232.199.in-addr.arpa

  • 8.8.8.8:53
    4.159.190.20.in-addr.arpa
    dns
    71 B
    157 B
    1
    1

    DNS Request

    4.159.190.20.in-addr.arpa

  • 8.8.8.8:53
    97.17.167.52.in-addr.arpa
    dns
    71 B
    145 B
    1
    1

    DNS Request

    97.17.167.52.in-addr.arpa

  • 8.8.8.8:53
    241.150.49.20.in-addr.arpa
    dns
    72 B
    158 B
    1
    1

    DNS Request

    241.150.49.20.in-addr.arpa

  • 8.8.8.8:53
    183.59.114.20.in-addr.arpa
    dns
    72 B
    158 B
    1
    1

    DNS Request

    183.59.114.20.in-addr.arpa

  • 8.8.8.8:53
    15.164.165.52.in-addr.arpa
    dns
    72 B
    146 B
    1
    1

    DNS Request

    15.164.165.52.in-addr.arpa

  • 8.8.8.8:53
    107.12.20.2.in-addr.arpa
    dns
    70 B
    133 B
    1
    1

    DNS Request

    107.12.20.2.in-addr.arpa

  • 8.8.8.8:53
    172.210.232.199.in-addr.arpa
    dns
    74 B
    128 B
    1
    1

    DNS Request

    172.210.232.199.in-addr.arpa

  • 8.8.8.8:53
    31.243.111.52.in-addr.arpa
    dns
    72 B
    158 B
    1
    1

    DNS Request

    31.243.111.52.in-addr.arpa

MITRE ATT&CK Matrix

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