Analysis

  • max time kernel
    142s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-03-2024 20:38

General

  • Target

    Sulfoxide/vcredist_x64.exe

  • Size

    3.0MB

  • MD5

    e231fbcce2c2cb16dcc299d36c734df3

  • SHA1

    f4d74643a0e117ea80b2c7ebcd908a6dd26aa9ea

  • SHA256

    4487570bd86e2e1aac29db2a1d0a91eb63361fcaac570808eb327cd4e0e2240d

  • SHA512

    4a3d27791f72d6feb38e55fe06b8a08f99bac315415d11e32cb6895cdd6f7145d46d070cd94ac879c4b87ff2a025b3781e662b32848ff2dbdd350cb46fe9177a

  • SSDEEP

    49152:or67+stI6RWGTAdyvlADUrpTmcOgohwJpEM5grO3oc1OXZViFeRyDErkLUMHzkRT:eM9l8pUr9m30L5grOQXZKAsErkbQRT

Score
7/10

Malware Config

Signatures

  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 1 IoCs
  • Drops file in Windows directory 57 IoCs
  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

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

  • Modifies data under HKEY_USERS 3 IoCs
  • Modifies registry class 56 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Sulfoxide\vcredist_x64.exe
    "C:\Users\Admin\AppData\Local\Temp\Sulfoxide\vcredist_x64.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:228
    • C:\Windows\SysWOW64\msiexec.exe
      msiexec /i vcredist.msi
      2⤵
      • Enumerates connected drives
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:4212
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4000
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1456
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 8C9A65F413261ED591506F5284930E3E
      2⤵
      • Loads dropped DLL
      PID:1268
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious use of AdjustPrivilegeToken
    PID:1516
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4396 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3216

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\vcredis1.cab

      Filesize

      312KB

      MD5

      77a9bff5af149160775741e204734d47

      SHA1

      7b5126af69b5a79593f39db94180f1ff11b0e39d

      SHA256

      20a26ed9a1edf7763a9b515522c5e29720048a482c7fbc8b7ff6bbdd27e61038

      SHA512

      bb0440f58f07e113bddd9a0afb5aab8af6493218784fe5fa6f4032e3a37088f91b7e766dee87cec4a9ea11d425d27b3b536430de3a52222e8bca3e0247d81e3b

    • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\vcredist.msi

      Filesize

      3.0MB

      MD5

      6dbdf338a0a25cdb236d43ea3ca2395e

      SHA1

      685b6ea61e574e628392eaac8b10aff4309f1081

      SHA256

      200fef5d4994523a02c4daa00060db28eb289b99d47fc6c1305183101e72bdeb

      SHA512

      6b5b31c55cf72ab92b17fb6074b3901a1e6afe0796ef9bc831e4dfb97450376d2889cd24b1cf3fce60eb3c1bcd1b31254b5cfa3ef6107974dfa0b35c233daf5a

    • C:\Windows\Installer\MSI4ABB.tmp

      Filesize

      28KB

      MD5

      85221b3bcba8dbe4b4a46581aa49f760

      SHA1

      746645c92594bfc739f77812d67cfd85f4b92474

      SHA256

      f6e34a4550e499346f5ab1d245508f16bf765ff24c4988984b89e049ca55737f

      SHA512

      060e35c4de14a03a2cda313f968e372291866cc4acd59977d7a48ac3745494abc54df83fff63cf30be4e10ff69a3b3c8b6c38f43ebd2a8d23d6c86fbee7ba87d

    • \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2

      Filesize

      23.7MB

      MD5

      534625a0b5278734b90392ed8e39974a

      SHA1

      7f2685e90075841309fa04dc7dd75f7f39537b55

      SHA256

      eb004621b13f6de9279c4689a3d66370ce674d77154ce430da4d0d6dc8a99dc9

      SHA512

      911bb03b8dd43d331f11a2ea9ad216ce7b62a73ec4ca42307d872f05367a7d126a5e80a6cda1dd66c1e730e5f9e41148a1aecc4c07cd894fe4b5d473a6599392

    • \??\Volume{d2bbef64-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{6b29cfd3-6321-4d17-8f1a-b2f16793647c}_OnDiskSnapshotProp

      Filesize

      6KB

      MD5

      26e3163d2852579352226843c0d0ed46

      SHA1

      bf067bee0b7afd6f40ccd35d256fd9e760f754f9

      SHA256

      0f5738a007c7acef43a1db7358850e20b338584ac560976d979f821a56c8b906

      SHA512

      ee65e329a06eef3be82fee4a4d0e4ae1e0ca509893d78978f7bd9a797cd38fe867bb5a12f03ba578264aa964ca2026ea1f70c277f880ba34b7c742996ecaaeb2