Analysis

  • max time kernel
    122s
  • max time network
    170s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    14-07-2021 15:35

General

  • Target

    f99fd17cc305e25cae93a53c5d7b5741.exe

  • Size

    922KB

  • MD5

    f99fd17cc305e25cae93a53c5d7b5741

  • SHA1

    f02ba6a83b0b52301e4e6d5ce486abcc88ef0421

  • SHA256

    463ace81e13b8db2ec0d6ee4182e27a7a91c9c65555006ad064cd1e27e92a46c

  • SHA512

    63dfe798d9a93d236f05aebd25dce4679fa227c27bca381e1771dfc2788cd735eb6aa36b07fc2d2d2cec0576987b91dba8e459165d4676741e9f29d293389f59

Malware Config

Signatures

  • A310logger

    A310 Logger is a .NET stealer/logger targeting passwords from browsers and email clients.

  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty Payload 3 IoCs
  • A310logger Executable 3 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f99fd17cc305e25cae93a53c5d7b5741.exe
    "C:\Users\Admin\AppData\Local\Temp\f99fd17cc305e25cae93a53c5d7b5741.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2024
    • C:\Users\Admin\AppData\Local\Temp\f99fd17cc305e25cae93a53c5d7b5741.exe
      "C:\Users\Admin\AppData\Local\Temp\f99fd17cc305e25cae93a53c5d7b5741.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:772
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\PASSWORDSNET4.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\PASSWORDSNET4.exe
        3⤵
        • Executes dropped EXE
        • Checks processor information in registry
        PID:1124
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\CREDITCARDNET4.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\CREDITCARDNET4.exe
        3⤵
        • Executes dropped EXE
        PID:1548

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/772-69-0x0000000076A81000-0x0000000076A83000-memory.dmp

    Filesize

    8KB

  • memory/772-76-0x00000000001F0000-0x00000000001F2000-memory.dmp

    Filesize

    8KB

  • memory/772-65-0x0000000000400000-0x000000000044A000-memory.dmp

    Filesize

    296KB

  • memory/1124-74-0x00000000011D0000-0x00000000011D1000-memory.dmp

    Filesize

    4KB

  • memory/1548-81-0x0000000000DB0000-0x0000000000DB1000-memory.dmp

    Filesize

    4KB

  • memory/2024-64-0x0000000005030000-0x00000000050A0000-memory.dmp

    Filesize

    448KB

  • memory/2024-59-0x0000000001140000-0x0000000001141000-memory.dmp

    Filesize

    4KB

  • memory/2024-63-0x0000000005530000-0x00000000055E4000-memory.dmp

    Filesize

    720KB

  • memory/2024-62-0x0000000000530000-0x0000000000540000-memory.dmp

    Filesize

    64KB

  • memory/2024-61-0x0000000000B00000-0x0000000000B01000-memory.dmp

    Filesize

    4KB