Analysis

  • max time kernel
    155s
  • max time network
    274s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241211-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    06/01/2025, 12:09 UTC

General

  • Target

    System.Buffers.dll

  • Size

    20KB

  • MD5

    ecdfe8ede869d2ccc6bf99981ea96400

  • SHA1

    2f410a0396bc148ed533ad49b6415fb58dd4d641

  • SHA256

    accccfbe45d9f08ffeed9916e37b33e98c65be012cfff6e7fa7b67210ce1fefb

  • SHA512

    5fc7fee5c25cb2eee19737068968e00a00961c257271b420f594e5a0da0559502d04ee6ba2d8d2aad77f3769622f6743a5ee8dae23f8f993f33fb09ed8db2741

  • SSDEEP

    384:/rMdp9yXOfPfAxR5zwWvYW8a2cyHRN7vCvlbLg:/rMcXP6N6e

Score
1/10

Malware Config

Signatures

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\System.Buffers.dll,#1
    1⤵
      PID:1256

    Network

    • flag-us
      DNS
      13.86.106.20.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      13.86.106.20.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      76.32.126.40.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      76.32.126.40.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      8.153.16.2.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      8.153.16.2.in-addr.arpa
      IN PTR
      Response
      8.153.16.2.in-addr.arpa
      IN PTR
      a2-16-153-8deploystaticakamaitechnologiescom
    • flag-us
      DNS
      95.221.229.192.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      95.221.229.192.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      196.249.167.52.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      196.249.167.52.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      fd.api.iris.microsoft.com
      Remote address:
      8.8.8.8:53
      Request
      fd.api.iris.microsoft.com
      IN A
      Response
      fd.api.iris.microsoft.com
      IN CNAME
      fd-api-iris.trafficmanager.net
      fd-api-iris.trafficmanager.net
      IN CNAME
      iris-de-prod-azsc-v2-weu.westeurope.cloudapp.azure.com
      iris-de-prod-azsc-v2-weu.westeurope.cloudapp.azure.com
      IN A
      20.103.156.88
    • flag-nl
      GET
      https://fd.api.iris.microsoft.com/v4/api/selection?&asid=EDC20E3BBE2843EFA39B90920917F58F&nct=1&placement=88000677&bcnt=30&country=US&locale=en-US&poptin=0&fmt=json&clr=cdmlite&arch=AMD64&concp=0&d3dfl=D3D_FEATURE_LEVEL_12_1&devfam=Windows.Desktop&devosver=10.0.19044.4529&dinst=1733929060&dmret=0&drgng=244&flightbranch=&flightring=Retail&localid=w%3A50ACBC7D-7476-6380-3B6C-0B9AD8F9FA09&osbranch=vb_release&oslocale=en-US&osret=1&ossku=EnterpriseS&osskuid=125&prccn=2&prccs=4192&prcmf=AuthenticAMD&procm=Intel%20Core%20Processor%20%28Broadwell%29&ram=4095&tinst=Client&tl=1&pat=0&smc=0&sac=0&disphorzres=1280&dispsize=14.7&dispvertres=720&ldisphorzres=1280&ldispvertres=720&moncnt=1&cpdsk=241361&frdsk=204381&lo=37272&tsu=37272
      Remote address:
      20.103.156.88:443
      Request
      GET /v4/api/selection?&asid=EDC20E3BBE2843EFA39B90920917F58F&nct=1&placement=88000677&bcnt=30&country=US&locale=en-US&poptin=0&fmt=json&clr=cdmlite&arch=AMD64&concp=0&d3dfl=D3D_FEATURE_LEVEL_12_1&devfam=Windows.Desktop&devosver=10.0.19044.4529&dinst=1733929060&dmret=0&drgng=244&flightbranch=&flightring=Retail&localid=w%3A50ACBC7D-7476-6380-3B6C-0B9AD8F9FA09&osbranch=vb_release&oslocale=en-US&osret=1&ossku=EnterpriseS&osskuid=125&prccn=2&prccs=4192&prcmf=AuthenticAMD&procm=Intel%20Core%20Processor%20%28Broadwell%29&ram=4095&tinst=Client&tl=1&pat=0&smc=0&sac=0&disphorzres=1280&dispsize=14.7&dispvertres=720&ldisphorzres=1280&ldispvertres=720&moncnt=1&cpdsk=241361&frdsk=204381&lo=37272&tsu=37272 HTTP/2.0
      host: fd.api.iris.microsoft.com
      accept-encoding: gzip, deflate
      x-sdk-hw-token: t=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&p=
      Response
      HTTP/2.0 200
      cache-control: no-store, no-cache
      pragma: no-cache
      content-length: 131
      content-type: application/json; charset=utf-8
      expires: Mon, 01 Jan 0001 00:00:00 GMT
      server: Microsoft-IIS/10.0
      arc-rsp-dbg: [{"DcoPlusDebug":"Status: Ok"},{"OPTOUTSTATE":"256"},{"REGIONALPOLICY":"0"}]
      accept-ch: UA, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform, UA-Platform-Version
      x-aspnet-version: 4.0.30319
      x-powered-by: ASP.NET
      strict-transport-security: max-age=31536000; includeSubDomains
      date: Mon, 06 Jan 2025 12:11:18 GMT
    • flag-us
      DNS
      88.156.103.20.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      88.156.103.20.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      53.210.109.20.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      53.210.109.20.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      241.42.69.40.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      241.42.69.40.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      29.243.111.52.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      29.243.111.52.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      29.243.111.52.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      29.243.111.52.in-addr.arpa
      IN PTR
    • flag-us
      DNS
      2.173.189.20.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      2.173.189.20.in-addr.arpa
      IN PTR
      Response
    • 20.103.156.88:443
      https://fd.api.iris.microsoft.com/v4/api/selection?&asid=EDC20E3BBE2843EFA39B90920917F58F&nct=1&placement=88000677&bcnt=30&country=US&locale=en-US&poptin=0&fmt=json&clr=cdmlite&arch=AMD64&concp=0&d3dfl=D3D_FEATURE_LEVEL_12_1&devfam=Windows.Desktop&devosver=10.0.19044.4529&dinst=1733929060&dmret=0&drgng=244&flightbranch=&flightring=Retail&localid=w%3A50ACBC7D-7476-6380-3B6C-0B9AD8F9FA09&osbranch=vb_release&oslocale=en-US&osret=1&ossku=EnterpriseS&osskuid=125&prccn=2&prccs=4192&prcmf=AuthenticAMD&procm=Intel%20Core%20Processor%20%28Broadwell%29&ram=4095&tinst=Client&tl=1&pat=0&smc=0&sac=0&disphorzres=1280&dispsize=14.7&dispvertres=720&ldisphorzres=1280&ldispvertres=720&moncnt=1&cpdsk=241361&frdsk=204381&lo=37272&tsu=37272
      tls, http2
      2.7kB
      7.5kB
      18
      13

      HTTP Request

      GET https://fd.api.iris.microsoft.com/v4/api/selection?&asid=EDC20E3BBE2843EFA39B90920917F58F&nct=1&placement=88000677&bcnt=30&country=US&locale=en-US&poptin=0&fmt=json&clr=cdmlite&arch=AMD64&concp=0&d3dfl=D3D_FEATURE_LEVEL_12_1&devfam=Windows.Desktop&devosver=10.0.19044.4529&dinst=1733929060&dmret=0&drgng=244&flightbranch=&flightring=Retail&localid=w%3A50ACBC7D-7476-6380-3B6C-0B9AD8F9FA09&osbranch=vb_release&oslocale=en-US&osret=1&ossku=EnterpriseS&osskuid=125&prccn=2&prccs=4192&prcmf=AuthenticAMD&procm=Intel%20Core%20Processor%20%28Broadwell%29&ram=4095&tinst=Client&tl=1&pat=0&smc=0&sac=0&disphorzres=1280&dispsize=14.7&dispvertres=720&ldisphorzres=1280&ldispvertres=720&moncnt=1&cpdsk=241361&frdsk=204381&lo=37272&tsu=37272

      HTTP Response

      200
    • 52.111.236.22:443
      322 B
      7
    • 8.8.8.8:53
      13.86.106.20.in-addr.arpa
      dns
      71 B
      157 B
      1
      1

      DNS Request

      13.86.106.20.in-addr.arpa

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

      DNS Request

      76.32.126.40.in-addr.arpa

    • 8.8.8.8:53
      8.153.16.2.in-addr.arpa
      dns
      69 B
      131 B
      1
      1

      DNS Request

      8.153.16.2.in-addr.arpa

    • 8.8.8.8:53
      95.221.229.192.in-addr.arpa
      dns
      73 B
      144 B
      1
      1

      DNS Request

      95.221.229.192.in-addr.arpa

    • 8.8.8.8:53
      196.249.167.52.in-addr.arpa
      dns
      73 B
      147 B
      1
      1

      DNS Request

      196.249.167.52.in-addr.arpa

    • 8.8.8.8:53
      fd.api.iris.microsoft.com
      dns
      71 B
      196 B
      1
      1

      DNS Request

      fd.api.iris.microsoft.com

      DNS Response

      20.103.156.88

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

      DNS Request

      88.156.103.20.in-addr.arpa

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

      DNS Request

      53.210.109.20.in-addr.arpa

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

      DNS Request

      241.42.69.40.in-addr.arpa

    • 8.8.8.8:53
      29.243.111.52.in-addr.arpa
      dns
      144 B
      158 B
      2
      1

      DNS Request

      29.243.111.52.in-addr.arpa

      DNS Request

      29.243.111.52.in-addr.arpa

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

      DNS Request

      2.173.189.20.in-addr.arpa

    MITRE ATT&CK Matrix

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