Analysis

  • max time kernel
    141s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    28-12-2023 04:44

General

  • Target

    c457e8760ba768b3a9746831c366ac1a.dll

  • Size

    1.2MB

  • MD5

    c457e8760ba768b3a9746831c366ac1a

  • SHA1

    94fec4b344f00e5f890c6c850743c80f98659a72

  • SHA256

    85a19656e73c4a3343b476bc823437a58df84e25a631fb543eb7bf876a9aef31

  • SHA512

    830bdd275b1d929e892ff4e474cde20550b88f82ac59354f40ecb007eebc04492a512044783559020016002bb81665d5162c638934af95d8ad9aa4566d885dbd

  • SSDEEP

    24576:0Wpc+G43nwqthqmmldpXoQ5IyXdLrgvHmrM:8+n3Hthqm9qgkM

Malware Config

Signatures

  • Bazar Loader

    Detected loader normally used to deploy BazarBackdoor malware.

  • Bazar/Team9 Loader payload 3 IoCs
  • Blocklisted process makes network request 16 IoCs
  • Tries to connect to .bazar domain 2 IoCs

    Attempts to lookup or connect to a .bazar domain, used by BazarBackdoor, Trickbot, and potentially others.

  • Unexpected DNS network traffic destination 2 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Modifies system certificate store 2 TTPs 6 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\c457e8760ba768b3a9746831c366ac1a.dll,#1
    1⤵
    • Blocklisted process makes network request
    • Modifies system certificate store
    PID:2548

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    3283f1e5d6ee10789be15f7a26625312

    SHA1

    c4a76ceb3a3bd83de1bcc3ccaccd8bbc3f2b2d00

    SHA256

    b01b28ac1693a8dd7e78d9d6487dc143e4713a13922d74ee1a15ac5b137f2563

    SHA512

    be8f42700d4b9ba1651a420ed419d2b7b1c78fde73c326a1e62d4a727127c3e1cb47714bcb58c065c404712ff2bf96423a222c291e87fd2d46794965379f7130

  • C:\Users\Admin\AppData\Local\Temp\Cab2F6C.tmp

    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • C:\Users\Admin\AppData\Local\Temp\Tar3BDD.tmp

    Filesize

    171KB

    MD5

    9c0c641c06238516f27941aa1166d427

    SHA1

    64cd549fb8cf014fcd9312aa7a5b023847b6c977

    SHA256

    4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

    SHA512

    936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

  • memory/2548-0-0x0000000027080000-0x00000000270BB000-memory.dmp

    Filesize

    236KB

  • memory/2548-1-0x000007FEF5F50000-0x000007FEF60D2000-memory.dmp

    Filesize

    1.5MB

  • memory/2548-3-0x0000000027080000-0x00000000270BB000-memory.dmp

    Filesize

    236KB