Windows 7 deprecation

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Analysis

  • max time kernel
    149s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    06/09/2024, 21:30

General

  • Target

    QuickUpgrade.exe

  • Size

    470KB

  • MD5

    06c4fe95b2ac2a6b334dbbd795fcee23

  • SHA1

    5a58f4866fd38dacf198943883cf894d079fd7eb

  • SHA256

    322410618f06240a9a7f6e853385fbb4ab6dd191f40a79c10ab059d369e3a625

  • SHA512

    0d1d5e534061a94ef7d0a275908f4fdf41c231e835673a07d9fd4a355f155348c02f7f7a39c5b7752f1e07d473e40a9d207043ca615e4cb3ae56fc0460a10e8f

  • SSDEEP

    3072:8MlF9kZSKyI9m1+rxy9dTDs/ZR1ctUA/86KF7HEG+qMQOrUsLVtPk7HoZ7WK7TBR:8MlsT9u+ty9xElcyWK+OKfLP7WG4

Score
6/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 7 IoCs
  • Enumerates physical storage devices 1 TTPs

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

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

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

  • Checks processor information in registry 2 TTPs 4 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 10 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\QuickUpgrade.exe
    "C:\Users\Admin\AppData\Local\Temp\QuickUpgrade.exe"
    1⤵
    • Loads dropped DLL
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:2348
    • C:\Users\Admin\AppData\Local\Temp\bitsum\processlasso\pl4sfx.exe
      "C:\Users\Admin\AppData\Local\Temp\bitsum\processlasso\pl4sfx.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2664
      • C:\Users\Admin\AppData\Local\Temp\PostUpdate.exe
        "C:\Users\Admin\AppData\Local\Temp\PostUpdate.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Suspicious use of WriteProcessMemory
        PID:2208
        • C:\Users\Admin\AppData\Local\Temp\processlasso.exe
          /postupdate
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Checks processor information in registry
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          PID:928
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {1FEBD792-64B6-4E49-9F8A-B9462068B5E7} S-1-5-21-3533259084-2542256011-65585152-1000:XPAJOTIY\Admin:Interactive:[1]
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1288
    • C:\Users\Admin\AppData\Local\Temp\bitsumsessionagent.exe
      C:\Users\Admin\AppData\Local\Temp\bitsumsessionagent.exe ----------------------------------------------------------------
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: GetForegroundWindowSpam
      PID:1716

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    342B

    MD5

    fe46b5166d5f822a087e081ae0025bf1

    SHA1

    95f778fd5b06b4f50b997f541388217e803b6ba2

    SHA256

    02e2a0db0e1aae6163758f137105dcb6ffb9245bb3d22d9c9001a51b4ed1188f

    SHA512

    8a550c0c5b526e889bc4ef4f2317d39225a64ad65a282a8e8159cccfb58f28164511eb66a53c36e9b9608c77297c336c4b7d453333d9b636a2b0338727a3611e

  • C:\Users\Admin\AppData\Local\Temp\CabD461.tmp

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • C:\Users\Admin\AppData\Local\Temp\QuickUpgrade.exe.Replacement

    Filesize

    471KB

    MD5

    91737cb259a911c4d3ebe86a80394a5a

    SHA1

    9ee7e343fc820f6490079df703c58b0057f2a3fe

    SHA256

    b11ea3ccf82d23d243d582a6f9543e6030dffe2fb251c4bbf32592ca104a4ad6

    SHA512

    a206468cb89f8fece354043dbc41f8165020af9b1500a88c6113215bbad3da8c8a3f4b91422d55daeceef85987827345f9be0325e4b9501e20ec673e9359168e

  • C:\Users\Admin\AppData\Local\Temp\TarD6C4.tmp

    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

  • C:\Users\Admin\AppData\Local\Temp\bitsum\processlasso\pl4sfx.exe

    Filesize

    2.9MB

    MD5

    cb28b620348ca4d4820fa04e887ad29b

    SHA1

    695d150253f733e40a8026d75d1595015b8e9dea

    SHA256

    19c0884a408640c004b19f731182c41988771eeaa993a99756a8345b304c4c17

    SHA512

    feba492c07ba74fff6a851cc3a3a1d919507118124aa19b54cec27fa27d73d03d5a4305bc3615ae1e011b24abed84fa07800e9c2f8293e7e7395fcbfef089bb3

  • C:\Users\Admin\AppData\Local\Temp\pl_rsrc_english.dll

    Filesize

    1.9MB

    MD5

    83b9b6fb187dd48de9026d9cd6aa5237

    SHA1

    620fd74c83a7e0431827a38f3dd721a978721c3a

    SHA256

    4ae449321a4c39be7188e2396cc84fd4f7d5dbd3d8ebf106d2946b255731e0c7

    SHA512

    246410a10304505eab65f2813f7122731c0987ce2c9faeaa854f211e87e396c451d419185bea2ba006fcd1f870ae49d17565aba28363b2ae8004bf46a690ef54

  • \Users\Admin\AppData\Local\Temp\PostUpdate.exe

    Filesize

    671KB

    MD5

    c718173b986d22f20375264a6ff8db2e

    SHA1

    6e25917fa5b41bdf458e308ca56b4e28c3ccf4d0

    SHA256

    a522ce2c6f9b773ec166e9a8dc837eafac1fcc92ded372d88eb70672af2f2bd5

    SHA512

    a29ce1b593f777dbe908e221ab0223889083b1cb0867f327a99671c5e42a9bb0837ca8d1cc155cfb2c10c4e237260ba7b1ed31b3ef2f0e8a9bfe04ed20574bc0

  • \Users\Admin\AppData\Local\Temp\ProcessLasso.exe

    Filesize

    1.8MB

    MD5

    a555448319d6288393a890aa21b96ebc

    SHA1

    aea2e5ec00ab28e8a79bae1987412821fff344b1

    SHA256

    f35aafd8036c5256208fb2ea14a49ea81e90c616488f7e0520d3c1c0c2d21295

    SHA512

    f17d69ce1576062bbaf230c385a0a91308c14c9078550efee14c0b1eda37fd4f93aa0fe07cbe0993f399873ac440dd9b3cc1a37ec388cef38c32e60524c9906e

  • \Users\Admin\AppData\Local\Temp\bitsumsessionagent.exe

    Filesize

    177KB

    MD5

    6d53279214e6376453e52b2b47832053

    SHA1

    9682159603dc9989707197fa2a7c1a4173b22fdc

    SHA256

    f065abf599ba12d271fb59801624187b0044324dd8c06e9fba47a749829f47e5

    SHA512

    6ff0f79976760211df6f0f34a00692105c952e65b19fb7668a30a0466de1b5c1490129eed7c96f32b4d5c297630c49d163a7f2ba35ddf90ae16d284105011914

  • \Users\Admin\AppData\Local\Temp\pl_rsrc_temp.dll

    Filesize

    1.9MB

    MD5

    998bdc4750f4717bfa380483d8fc40d3

    SHA1

    a76eb51d66ce876b73b9def4e9b2cf2962be8989

    SHA256

    0f77e042e7c6c475b1585113ccb9b7af66e6e998b8c946dcc1448e3f62a9475b

    SHA512

    c3f3f518a7aeb45ee91500bc668c20b8f76b313d98b052b6046fcac24bb70f59e1918188cc1178ed4b307d13aa9743f7632a008941e42d01f3f1a79569d7ff32