Analysis

  • max time kernel
    150s
  • max time network
    140s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    16-01-2025 10:08

General

  • Target

    AA_v3.5.exe

  • Size

    746KB

  • MD5

    f8cd52b70a11a1fb3f29c6f89ff971ec

  • SHA1

    6a0c46818a6a10c2c5a98a0cce65fbaf95caa344

  • SHA256

    6f2258383b92bfaf425f49fc7a5901bfa97a334de49ce015cf65396125c13d20

  • SHA512

    987b6b288a454b6198d4e7f94b7bba67cafe37f9654cd3cd72134a85958efd2125596ae48e66a8ee49ee3f4199dac7f136e1831f2bf4015f25d2980f0b866abe

  • SSDEEP

    12288:PUYpJqMH2OwlaUPcWWw5XZV8f64RteVpN5ETMasTjcP6gX:zpJJWOwlaUPcWWwRZb4Rt+N5WMasHoX

Malware Config

Signatures

  • FlawedAmmyy RAT

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

  • Flawedammyy family
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 6 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe
    "C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:2100
  • C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe
    "C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe" -service -lunch
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2972
    • C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe
      "C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2976

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\AMMYY\hr

    Filesize

    22B

    MD5

    aae744d5480be5389cc0b5be553288ea

    SHA1

    d401927b84016f0948300e215bdc914ddcc42aa0

    SHA256

    f12a1d119ec59641a749cbe620cb6e03bbaa671051250fce52fc7a5b9ed9aa61

    SHA512

    abf294b4d6a0cd4b3240952c3ea16c05641f4e052a852be3141d32f240ebe39ba7b8525da823df1eccc6818285db12ba5c5a99d0e8e4e8f4234a64fac01785d8

  • C:\ProgramData\AMMYY\hr3

    Filesize

    75B

    MD5

    6824c62caa4d28dddb9e5fe721dce72e

    SHA1

    0069662101d642c96ba08ba378e0277a961c4c4b

    SHA256

    fe57907c02fed78983613738a1f64543b678d250c0f97677b4f69c307d851924

    SHA512

    b73814fc6cf7204a05a6ae91fba9b5a2300ccc00f3dc4b87e87114c8f7b55c94625c8eb088b6ac004ce089f5aa2ec1e343ca80121e58ac0239e6765870d777d2

  • C:\ProgramData\AMMYY\settings3.bin

    Filesize

    271B

    MD5

    714f2508d4227f74b6adacfef73815d8

    SHA1

    a35c8a796e4453c0c09d011284b806d25bdad04c

    SHA256

    a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480

    SHA512

    1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8