Overview

overview

8

Static

static

ff79682bb3...5c.exe

windows7_x64

8

ff79682bb3...5c.exe

windows10_x64

8

Analysis

  • max time kernel
    149s
  • max time network
    192s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    27-07-2021 15:00

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General

  • Target

    ff79682bb303ab3bdb0ea4dd42c27a987db53d1f6764fa7745cb4c34db8e4e5c.exe

  • Size

    40KB

  • MD5

    c58ecc617fb2cbf40f4703cfd4b70104

  • SHA1

    4d7e1750af1060a9a6a5f7aa7fcc986d0a3549e6

  • SHA256

    ff79682bb303ab3bdb0ea4dd42c27a987db53d1f6764fa7745cb4c34db8e4e5c

  • SHA512

    ba85396ef07f695a1361eedfc3d179689187d6799109aefe727deac88bf2eac35d0cbac11ecf7e279964022b71938af39449e6cd21e65bc488c35335326c3f8b

Score
8/10
evasionpersistence

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
    evasion
  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops autorun.inf file 1 TTPs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 31 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ff79682bb303ab3bdb0ea4dd42c27a987db53d1f6764fa7745cb4c34db8e4e5c.exe
    "C:\Users\Admin\AppData\Local\Temp\ff79682bb303ab3bdb0ea4dd42c27a987db53d1f6764fa7745cb4c34db8e4e5c.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:628
    • C:\Windows\server.exe
      "C:\Windows\server.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1628
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Windows\server.exe" "server.exe" ENABLE
        3⤵
          PID:872

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Replication Through Removable Media

    1
    T1091

    Execution

    Persistence

    Modify Existing Service

    1
    T1031

    Registry Run Keys / Startup Folder

    1
    T1060

    Privilege Escalation

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Discovery

    System Information Discovery

    1
    T1082

    Lateral Movement

    Replication Through Removable Media

    1
    T1091

    Collection

    Exfiltration

    Command and Control

    Impact

    Replay Monitor

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    Downloads

    • C:\Windows\server.exe
      MD5

      c58ecc617fb2cbf40f4703cfd4b70104

      SHA1

      4d7e1750af1060a9a6a5f7aa7fcc986d0a3549e6

      SHA256

      ff79682bb303ab3bdb0ea4dd42c27a987db53d1f6764fa7745cb4c34db8e4e5c

      SHA512

      ba85396ef07f695a1361eedfc3d179689187d6799109aefe727deac88bf2eac35d0cbac11ecf7e279964022b71938af39449e6cd21e65bc488c35335326c3f8b

      Download Submit
    • C:\Windows\server.exe
      MD5

      c58ecc617fb2cbf40f4703cfd4b70104

      SHA1

      4d7e1750af1060a9a6a5f7aa7fcc986d0a3549e6

      SHA256

      ff79682bb303ab3bdb0ea4dd42c27a987db53d1f6764fa7745cb4c34db8e4e5c

      SHA512

      ba85396ef07f695a1361eedfc3d179689187d6799109aefe727deac88bf2eac35d0cbac11ecf7e279964022b71938af39449e6cd21e65bc488c35335326c3f8b

      Download Submit
    • memory/628-59-0x00000000757C1000-0x00000000757C3000-memory.dmp
      Filesize

      8KB

      Download
    • memory/628-60-0x0000000001EA0000-0x0000000001EA1000-memory.dmp
      Filesize

      4KB

      Download
    • memory/872-66-0x0000000000000000-mapping.dmp
      Download
    • memory/1628-61-0x0000000000000000-mapping.dmp
      Download
    • memory/1628-65-0x0000000000310000-0x0000000000311000-memory.dmp
      Filesize

      4KB

      Download