Analysis

  • max time kernel
    149s
  • max time network
    144s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250313-en
  • resource tags

    arch:x64arch:x86image:win11-20250313-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    03/04/2025, 17:38

General

  • Target

    Google Ai Browser v1.0.9.msi

  • Size

    68.9MB

  • MD5

    a8f19829f0c6a008c9e4a2fa60c17fe1

  • SHA1

    bd6006f43b88b4bce6929a03a34d7daf3d53829f

  • SHA256

    d7c1332432d04e757cf1e7f684f3eaf7558df0d2b076ebe293e393151bb5391f

  • SHA512

    e301c24967e35ec5259dd43c3109fd9e5a243b54bf1ae690ee25c2193fb9772eb8ad85d0add305dd045b6ba003a4bd0c687d2ace480b4ee7bb9a0a71f2464533

  • SSDEEP

    1572864:O0sBl88NiDnEr1FV6YWCfHdc5nfXR3w4y5v7PjOwNAWK3CMkT/BmPoP3jqjjrNG:8RMDELV6wfdc5nW4yhOmAWlMkVC

Malware Config

Extracted

Family

valleyrat_s2

Version

1.0

C2

23.133.4.3:6666

23.133.4.3:7777

127.0.0.1:80

Attributes
  • campaign_date

    2025. 2.28

Signatures

  • ValleyRat

    ValleyRat stage2 is a backdoor written in C++.

  • Valleyrat_s2 family
  • Enumerates connected drives 3 TTPs 64 IoCs

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

  • Drops file in Windows directory 14 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 9 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

  • 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 23 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I "C:\Users\Admin\AppData\Local\Temp\Google Ai Browser v1.0.9.msi"
    1⤵
    • Enumerates connected drives
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:1844
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • 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:2940
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 027887FB6C7AD23F81CF0080879A3E30 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:396
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:2420
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 6B7FC15B0E79AEA637DAB0A3557CE3E3
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1824
        • C:\Users\Admin\AppData\Roaming\Mancyag\Google Ai Browser v1.0.9\uc.exe
          "C:\Users\Admin\AppData\Roaming\Mancyag\Google Ai Browser v1.0.9\uc.exe"
          3⤵
          • Enumerates connected drives
          • Executes dropped EXE
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: AddClipboardFormatListener
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          PID:5056
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:2360

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Config.Msi\e58e27c.rbs

      Filesize

      20KB

      MD5

      64bb001a9b8ebeca88d10c28aaed9b88

      SHA1

      bc24f31369d5338258ffc550819af5047c343c62

      SHA256

      a941ee8c991565f5c06e1e1d7c8f1e170ae82401623cc5d7be5518f400c3760e

      SHA512

      19a18303ba0576854f39a10ca0dd15eb9d6ed373c4e6602d679fb131e2e3ce53de18f6d2b2586746e1351728fe560e7ff10f5003f5fadb713767f169d958b69b

    • C:\ProgramData\11UCore3.cpy

      Filesize

      229KB

      MD5

      003a41d52177c23eb8e3a7ced50324ae

      SHA1

      29b04e9c7f4262e5fdd7f487d3abc71a69b2de95

      SHA256

      0d27409ef8c71e81534006253109ce1072ad55cbf8a10a72b694426a45f6562b

      SHA512

      7b72294dba4d47ff4a41b3ff4ceefb7dbf2961928c1175ccc87b07852c1595d91892c2b29a5d294a0332ff9bb28ac32c4f963c40c58a7f8d9fb2829037cd4772

    • C:\Users\Admin\AppData\Local\Temp\MSI611B.tmp

      Filesize

      436KB

      MD5

      475d20c0ea477a35660e3f67ecf0a1df

      SHA1

      67340739f51e1134ae8f0ffc5ae9dd710e8e3a08

      SHA256

      426e6cf199a8268e8a7763ec3a4dd7add982b28c51d89ebea90ca792cbae14dd

      SHA512

      99525aaab2ab608134b5d66b5313e7fc3c2e2877395c5c171897d7a6c66efb26b606de1a4cb01118c2738ea4b6542e4eb4983e631231b3f340bf85e509a9589e

    • C:\Users\Admin\AppData\Roaming\Mancyag\Google Ai Browser v1.0.9\11UCore.dll

      Filesize

      726KB

      MD5

      a042e037cd57ea1b93cfea3422a5d8a9

      SHA1

      aec7fac9e60565e0f5d8e3bc56308d4b5c4cdc71

      SHA256

      a37a054cc6244d10f4ba5be8020dc7b6b7ef7d3c2c4f1727d7779021e9150018

      SHA512

      5be7a1a0ec764dd404cda28aa03b3eadbca2c4e2bb2948add6650c28d2d8d3b14204e292776445ef9104ba4fb9193d430a040a4fd89f41af5939c85b8dad1306

    • C:\Users\Admin\AppData\Roaming\Mancyag\Google Ai Browser v1.0.9\uc.exe

      Filesize

      1.3MB

      MD5

      0318aa67eaebc33d51ad2f675536bac1

      SHA1

      2355fc33db6eef7b6d6abd93fb148109db4c3e5f

      SHA256

      9f8d81705e17df1fb0ac6288455d7d52ce64abdc8fc4ea6ec917f18baeae8ee0

      SHA512

      e0a39951c4a25aa17c16e0636218ed490212d6fcf9f8602ff64af497f103604857d735b6f391a83df314157adfc05b2c31cca5589e76b96dbdbfbf5177799647

    • C:\Users\Admin\AppData\Roaming\Mancyag\Google Ai Browser v1.0.9\update.cab

      Filesize

      137KB

      MD5

      5fd3c6cadd7ba6952b6f2a36960540e1

      SHA1

      4bd280842c3c68a582e7d46918024e46cf0217be

      SHA256

      dfc09ef787c4ed4343c1f6210c6041b4bca084929130f657475964e9ee1354f2

      SHA512

      512a20dc3d29d44a541433649f332344724e5460aa621d0cd1e89d5378418a3a16fd857611704f88e09d9ea93cf4e34ae70a5d6a3a632b1016eee34b2399b05f

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

      Filesize

      24.6MB

      MD5

      155321a6d44f2b8bd49c114bd5ea4483

      SHA1

      95df308e806da174a28ae1949031a93ffd3fa9bc

      SHA256

      ede4d8afaeb0fbff3a74bebf7d06c88b39213cd34376ceb06ae4b6d4f2c23274

      SHA512

      ac3325e28e60abd171ec8910836e8612c9db1db0ec2e66f749bba1c09020ff46fe00e8957a5e72bc071f9cbcd31029d75be15286d6e0b8b5aa060e5c2abe19f8

    • \??\Volume{475b57dd-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{9613b813-b4d4-4bc7-801e-02c49590f928}_OnDiskSnapshotProp

      Filesize

      6KB

      MD5

      271b975f25cb89a45031a17f09ef2dab

      SHA1

      a94b568b520d3367e92a613364dc1dd2c0610482

      SHA256

      b7765c023e0ef641068a087ed83b6c4825677ca1d91832eba553d8cdd998122d

      SHA512

      12626b7a66b72fe977aa819b501f237e576962bc7d59e5ab46e9f6b80421f0136f45a521db23b74a0d0981f03d0649f587212942f37559af4e0f218cfd12b3c7

    • memory/1824-111-0x0000000074AC0000-0x0000000074B3C000-memory.dmp

      Filesize

      496KB

    • memory/5056-119-0x0000000003090000-0x0000000003190000-memory.dmp

      Filesize

      1024KB

    • memory/5056-128-0x0000000003090000-0x0000000003190000-memory.dmp

      Filesize

      1024KB

    • memory/5056-120-0x0000000003090000-0x0000000003190000-memory.dmp

      Filesize

      1024KB

    • memory/5056-123-0x00000000038F0000-0x0000000003948000-memory.dmp

      Filesize

      352KB

    • memory/5056-122-0x0000000003090000-0x0000000003190000-memory.dmp

      Filesize

      1024KB

    • memory/5056-124-0x00000000038F0000-0x0000000003948000-memory.dmp

      Filesize

      352KB

    • memory/5056-125-0x00000000038F0000-0x0000000003948000-memory.dmp

      Filesize

      352KB

    • memory/5056-126-0x00000000038F0000-0x0000000003948000-memory.dmp

      Filesize

      352KB

    • memory/5056-127-0x00000000038F0000-0x0000000003948000-memory.dmp

      Filesize

      352KB

    • memory/5056-121-0x0000000003090000-0x0000000003190000-memory.dmp

      Filesize

      1024KB

    • memory/5056-129-0x0000000003090000-0x0000000003190000-memory.dmp

      Filesize

      1024KB

    • memory/5056-118-0x0000000003090000-0x0000000003190000-memory.dmp

      Filesize

      1024KB

    • memory/5056-116-0x0000000002E90000-0x0000000002F90000-memory.dmp

      Filesize

      1024KB

    • memory/5056-132-0x0000000074A30000-0x0000000074AAC000-memory.dmp

      Filesize

      496KB

    • memory/5056-134-0x0000000010000000-0x0000000010038000-memory.dmp

      Filesize

      224KB

    • memory/5056-133-0x00000000038F0000-0x0000000003948000-memory.dmp

      Filesize

      352KB

    • memory/5056-138-0x00000000038F0000-0x0000000003948000-memory.dmp

      Filesize

      352KB

    • memory/5056-140-0x00000000038F0000-0x0000000003948000-memory.dmp

      Filesize

      352KB

    • memory/5056-139-0x00000000038F0000-0x0000000003948000-memory.dmp

      Filesize

      352KB