Resubmissions

14-09-2021 09:52

210914-lv85wsaebj 10

09-07-2021 18:31

210709-dplxbpw8y2 10

Analysis

  • max time kernel
    80s
  • max time network
    136s
  • platform
    windows10_x64
  • resource
    win10-en
  • submitted
    14-09-2021 09:52

General

  • Target

    bf4ca3ef810bbc866015723e09cdfb7b.exe

  • Size

    476KB

  • MD5

    bf4ca3ef810bbc866015723e09cdfb7b

  • SHA1

    b1ef1b47cb790ee88866d31bb09929a516e36caf

  • SHA256

    70707206bfdc0b86a9494f7780c55829e993a93a7d65d0279bc9c73b97ffc005

  • SHA512

    1fdac4d5fc922265871ac741fb3241e28307e6c52297e515e8e5aaeb85c9fb2c88183a3a0f080c4ae9e53e1553064d9308a74b5888b8c42f813e395c09aa45b8

Malware Config

Signatures

  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 55 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bf4ca3ef810bbc866015723e09cdfb7b.exe
    "C:\Users\Admin\AppData\Local\Temp\bf4ca3ef810bbc866015723e09cdfb7b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4676
    • C:\Users\Admin\AppData\Local\Temp\bf4ca3ef810bbc866015723e09cdfb7b.exe
      C:\Users\Admin\AppData\Local\Temp\bf4ca3ef810bbc866015723e09cdfb7b.exe
      2⤵
      • Modifies system executable filetype association
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Modifies registry class
      PID:4840

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/4676-115-0x0000000000C50000-0x0000000000C51000-memory.dmp

    Filesize

    4KB

  • memory/4676-117-0x0000000005BC0000-0x0000000005BC1000-memory.dmp

    Filesize

    4KB

  • memory/4676-118-0x0000000005570000-0x0000000005571000-memory.dmp

    Filesize

    4KB

  • memory/4676-119-0x00000000056C0000-0x0000000005BBE000-memory.dmp

    Filesize

    5.0MB

  • memory/4676-120-0x00000000054F0000-0x00000000054F1000-memory.dmp

    Filesize

    4KB

  • memory/4676-121-0x0000000005B00000-0x0000000005B61000-memory.dmp

    Filesize

    388KB

  • memory/4676-122-0x0000000007140000-0x0000000007141000-memory.dmp

    Filesize

    4KB

  • memory/4676-123-0x0000000005B90000-0x0000000005B91000-memory.dmp

    Filesize

    4KB

  • memory/4676-128-0x00000000079C0000-0x0000000007A22000-memory.dmp

    Filesize

    392KB

  • memory/4840-129-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/4840-130-0x00000000004080E4-mapping.dmp

  • memory/4840-131-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB