General

  • Target

    fud.zip

  • Size

    15.3MB

  • Sample

    250419-szkreszvbv

  • MD5

    16a3d7fe2daaec168522818e8e4352eb

  • SHA1

    cc421ffb059ddde7b99112edf3a98121458726e5

  • SHA256

    bfa990bda3eebc658bcd0014dbfc9d57277e585548031f7ce4ecfcc8223f7b6b

  • SHA512

    5e1f80ea42b5b72a3fc27c3aa1c882d305d68e4d150c7cf21522e25acaaf376b496f57667a6f2ac67031c1708e96414e314e66b88599eaa9f77a1d4b41d7c957

  • SSDEEP

    393216:nSfvN08cA9br0VcaSLRxFijecz53Z5tPjNhRm3ygnrHoiFz:nYN08v9br0VFK6Z5X7mLHoiFz

Malware Config

Extracted

Family

quasar

C2

��:a>՘�后��s��6�F�l濺�,@ 3&�

Attributes
  • encryption_key

    0A2600918F5E13281DD3F3E3CF35CA2FEACB6884

  • reconnect_delay

    3000

  • startup_key

    �� D���s�+���\� r8t$�

Targets

    • Target

      fud.zip

    • Size

      15.3MB

    • MD5

      16a3d7fe2daaec168522818e8e4352eb

    • SHA1

      cc421ffb059ddde7b99112edf3a98121458726e5

    • SHA256

      bfa990bda3eebc658bcd0014dbfc9d57277e585548031f7ce4ecfcc8223f7b6b

    • SHA512

      5e1f80ea42b5b72a3fc27c3aa1c882d305d68e4d150c7cf21522e25acaaf376b496f57667a6f2ac67031c1708e96414e314e66b88599eaa9f77a1d4b41d7c957

    • SSDEEP

      393216:nSfvN08cA9br0VcaSLRxFijecz53Z5tPjNhRm3ygnrHoiFz:nYN08v9br0VFK6Z5X7mLHoiFz

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Executes dropped EXE

    • Loads dropped DLL

    • Target

      Installer.exe

    • Size

      53KB

    • MD5

      f323bb458ecbd21acdddd5ea770e775f

    • SHA1

      9b04a6ea2e6efcc81d344f6425928c5700e9a3f6

    • SHA256

      4030427f5e93a3cbb5072fe12afb02a4cb6447a4d0061b4dc9f71fdb783ab926

    • SHA512

      ca08182341611a89da1f4c90efbd065691a551e68d534ed509bf3ffca8d821362be14b175cfb8378fc2199432938c1d3e63524d9424802a37c0435467a5dabe2

    • SSDEEP

      768:ZId0rRueeCTXZJa0CMpWBUlNP/hA8OE2fbsE/g0+EFiRs:ZId+KQXZPCiWBU8fAL5eim

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Looks up external IP address via web service

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

    • Target

      msys-2.0.dll

    • Size

      88KB

    • MD5

      f947218a2b6bc294c22175030824c12b

    • SHA1

      ba97c647a21d78f4d70135231574a9162998a3bf

    • SHA256

      940d104b54c78abc2ab4af8d88c0da0083dda6ddf63e92976d96fadcf46d35c4

    • SHA512

      46cb9b32a5bc07fb55fded5e42bbc8362ba0106d19c4441a639a821cd612867f676017d525d167384c9595b506db2d7a6f2ac8fa2d2c7fe102ede7b6132cd6e5

    • SSDEEP

      1536:gsssTDMfCgjgibbqJ7tJ2Lr/lWzv0EH80OrxECICtf1eL5eim:hsOo6yOJRJ2X/czv0EH80OrxE9Ctf1eC

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Target

      tmpD01A.dll

    • Size

      3.5MB

    • MD5

      1a201cec87e2370a08dc00acc065501a

    • SHA1

      02ff14bbb59d380cc8e7ffea711d978248bfcb83

    • SHA256

      709f39277a3393fbdb4349bb19b80e2d976dd8926d6fcbe0e59d699338846016

    • SHA512

      e80e75a672807dfa1da6002bb02e8024eaadb75f79f22c40c72c82c213d99b3f4dcdeb963a7587c0a5532fa8b6c53e9ac6eb512fc422d654191215e266eef1e1

    • SSDEEP

      98304:UMoiKk/w5lfGCSlKNS48Rzp3roT91u7MHLzV0ZghXVp2vGmB:8iKk/9CSlKNvq

    Score
    1/10
    • Target

      vcruntime140.dll

    • Size

      116KB

    • MD5

      699dd61122d91e80abdfcc396ce0ec10

    • SHA1

      7b23a6562e78e1d4be2a16fc7044bdcea724855e

    • SHA256

      f843cd00d9aff9a902dd7c98d6137639a10bd84904d81a085c28a3b29f8223c1

    • SHA512

      2517e52f7f03580afd8f928c767d264033a191e831a78eed454ea35c9514c0f0df127f49a306088d766908af7880f713f5009c31ce6b0b1e4d0b67e49447bfff

    • SSDEEP

      1536:KqvQFDdwFBHKaPX8YKpWgeQqbekRG7MP4ddbsecbWcmpCGa3QFzFtjXzp:KqvQFDUXqWn7CkRG7YecbWb9a3kDX9

    Score
    1/10
    • Target

      winAPI.dll

    • Size

      36.0MB

    • MD5

      fb466528aac78a063f4c60882a33ddc9

    • SHA1

      2af35fa26c27e402e66b7c46d136a4a578f975af

    • SHA256

      6f157135b2b74872f88863cc5bd1edbe8fbe3532dfb9e1b961afca9bb5c77fd3

    • SHA512

      0539f5681271f70262288fcc0b7bd89d63c6c8b8f32f96bd43878df531f9997cde314357f541ca49f58363c484cca80a107b450fd37e3e35e75fd90edac71e77

    • SSDEEP

      393216:f1Du8BtuBw2FEL3Z3aLUoQvo6LP/SgbSpYvKEh1EdKwlGQKPJuGsiTfREsrgCYf8:fMguj8Q4VfvwqFTrYCl

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

MITRE ATT&CK Enterprise v16

Tasks