Resubmissions

15-01-2025 16:15

250115-tqnx6ayrgq 3

15-01-2025 14:57

250115-sbyndaxmfp 10

Analysis

  • max time kernel
    116s
  • max time network
    106s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    15-01-2025 14:57

General

  • Target

    MDE_File_Sample_050b7eba825412b24e3f02d76d7da5ae97e10502.zip

  • Size

    424KB

  • MD5

    33b8e032a8e8a2336d3ac91916acdb85

  • SHA1

    682ac5bfbe01633854670e2dba5cd1c108c40b7b

  • SHA256

    23da52f1f639e19c4fd6494c8858efbb75321b2424e1a162f9146607102d6482

  • SHA512

    d69b82993405571ca8aa89c3bb054c89ee5b6af26fd1b489dd2f8df43e561b91dc2d978ee6ca3923f53f8dc70419f11d617b7f2d0d50003aeb18d663270b0c1c

  • SSDEEP

    6144:DHZe8QrJS/sVebaJS3TJI1UCfygv7TEfuJaR+weHpCMvwyQZ/aIJ66PueapTU4e9:Dgrro/dOJS31GouzIc6Vaq5

Malware Config

Signatures

  • Ammyy Admin

    Remote admin tool with various capabilities.

  • AmmyyAdmin payload 1 IoCs
  • Ammyyadmin family
  • FlawedAmmyy RAT

    Remote-access trojan based on leaked code for the Ammyy remote admin software.

  • Flawedammyy family
  • Blocklisted process makes network request 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 4 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Drops file in System32 directory 5 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.

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious behavior: SetClipboardViewer 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of FindShellTrayWindow 6 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Program Files\7-Zip\7zFM.exe
    "C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\MDE_File_Sample_050b7eba825412b24e3f02d76d7da5ae97e10502.zip"
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:3004
  • C:\Users\Admin\Desktop\AA_v3.exe
    "C:\Users\Admin\Desktop\AA_v3.exe"
    1⤵
    • Executes dropped EXE
    • Writes to the Master Boot Record (MBR)
    • System Location Discovery: System Language Discovery
    PID:2832
  • C:\Users\Admin\Desktop\AA_v3.exe
    "C:\Users\Admin\Desktop\AA_v3.exe" -service -lunch
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2624
    • C:\Users\Admin\Desktop\AA_v3.exe
      "C:\Users\Admin\Desktop\AA_v3.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Writes to the Master Boot Record (MBR)
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      • Modifies system certificate store
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious behavior: SetClipboardViewer
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:2680
      • C:\Windows\system32\rundll32.exe
        rundll32.exe "C:\ProgramData\AMMYY\aa_nts.dll",run
        3⤵
        • Blocklisted process makes network request
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1680

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\AMMYY\aa_nts.dll

    Filesize

    902KB

    MD5

    480a66902e6e7cdafaa6711e8697ff8c

    SHA1

    6ac730962e7c1dba9e2ecc5733a506544f3c8d11

    SHA256

    7eaaaa6010bbcd6bb8c9ad08d4b0966c7aedc9b2ac24758f170012ac36e508b5

    SHA512

    7d010cd47b7d1adf66f9c97afc6c3805997aa5c7cc6ff13eddee81f24cf2b95a3fe375ec5b3d6185c0bc8840b4ad91ae143c73a39af26391cc182ab6a1793ba5

  • C:\ProgramData\AMMYY\aa_nts.log

    Filesize

    4KB

    MD5

    2d81b50b442a61904bc4c80163223ac9

    SHA1

    d5afc26d3ccd15f2651bd6a4bbd77f0a5335556e

    SHA256

    25fa871d1b943005483a60375c56d8e8912a04e1a2cb4bbeb68a2a2bbc011bd3

    SHA512

    2e4ab3801a1dd8c1006e139084b3d5341db4dba9f8e340f968ff130f698640666823da92d43ed52935cad1d5a0cdaa066bb5cda56009738e0fbba37649b9619d

  • C:\ProgramData\AMMYY\aa_nts.msg

    Filesize

    46B

    MD5

    76038623e270f399769df67a3ed15c16

    SHA1

    ebf7d7537f45738be48e6f64d59c846b13fb4334

    SHA256

    4dbdf4f709d50f9521e92ce5f7d4f305e2384bcda387fb2b325ff17d205bb687

    SHA512

    a5316694d844e5b10c589f58fdf65645568b3909b2914f85c99195f9625e4124f787bc0980cff98f1e8289ff84824620a03f32cdab18e5bbcb2e59b33f397aec

  • C:\ProgramData\AMMYY\settings3.bin

    Filesize

    334B

    MD5

    70557e923e5991db1e84459592e5b0d1

    SHA1

    edbc199492ce1c1feb9d88d0dd6e201bbf19493b

    SHA256

    3f03fe709d41004d70f4d814e2843e4232b8342668fd56998f84a0318029deb4

    SHA512

    92d006beb8e513cb063323452f6808fa0e598506e41d0965039eb5c3091fc8a0c4ff2014b2c50367f19871865e60b4995208ef33cdd043bf9918e123b75d0d5e

  • C:\Users\Admin\Desktop\AA_v3.exe

    Filesize

    798KB

    MD5

    90aadf2247149996ae443e2c82af3730

    SHA1

    050b7eba825412b24e3f02d76d7da5ae97e10502

    SHA256

    ee573647477339784dcef81024de1be1762833a20e5cc2b89a93e47d05b86b6a

    SHA512

    eec32bb82b230dd309c29712e72d4469250e651449e127479d178eddbafd5a46ec8048a753bc2c1a0fdf1dc3ed72a9453ca66fb49cbf0f95a12704e5427182be

  • memory/1680-26-0x0000000064200000-0x00000000642EE000-memory.dmp

    Filesize

    952KB

  • memory/1680-52-0x0000000064200000-0x00000000642EE000-memory.dmp

    Filesize

    952KB

  • memory/1680-72-0x0000000064200000-0x00000000642EE000-memory.dmp

    Filesize

    952KB