Overview

overview

10

Static

static

10

a76dbe766b...83.exe

windows7_x64

10

a76dbe766b...83.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    151s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    20-05-2022 23:28

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General

  • Target

    a76dbe766b8e6f8953fecc6f20c2f1b54892c0d1b416c3817dfef983902ee183.exe

  • Size

    853KB

  • MD5

    ede5bbc69594ab35cd44eead5dc73752

  • SHA1

    32734225f02f0fd4a375313183b692900ee5eeea

  • SHA256

    a76dbe766b8e6f8953fecc6f20c2f1b54892c0d1b416c3817dfef983902ee183

  • SHA512

    22b24fba0d320be89765d6fd9bde2226c2e928c4ef6e9476b69b1ee426c59072949c045c834b357ec747a679b2f613750d3058c46d89a1ec47bfa7622b0a543c

Score
10/10
phobospersistenceransomware

Malware Config

Signatures

  • Phobos

    Phobos ransomware appeared at the beginning of 2019.

    ransomwarephobos
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Drops startup file 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops desktop.ini file(s) 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of SetThreadContext 1 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Script User-Agent 2 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a76dbe766b8e6f8953fecc6f20c2f1b54892c0d1b416c3817dfef983902ee183.exe
    "C:\Users\Admin\AppData\Local\Temp\a76dbe766b8e6f8953fecc6f20c2f1b54892c0d1b416c3817dfef983902ee183.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1972
    • C:\Program Files (x86)\internet explorer\ieinstal.exe
      "C:\Program Files (x86)\internet explorer\ieinstal.exe"
      2⤵
      • Drops startup file
      • Adds Run key to start application
      • Drops desktop.ini file(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1716
      • C:\Program Files (x86)\internet explorer\ieinstal.exe
        "C:\Program Files (x86)\internet explorer\ieinstal.exe"
        3⤵
          PID:1208
        • C:\Windows\system32\cmd.exe
          "C:\Windows\system32\cmd.exe"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1820
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            4⤵
            • Interacts with shadow copies
            PID:996
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:808

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Privilege Escalation

    Defense Evasion

    File Deletion

    2
    T1107

    Modify Registry

    1
    T1112

    Credential Access

    Discovery

    Lateral Movement

    Collection

    Exfiltration

    Command and Control

    Web Service

    1
    T1102

    Impact

    Inhibit System Recovery

    2
    T1490

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/996-64-0x0000000000000000-mapping.dmp
      Download
    • memory/1716-55-0x0000000000400000-0x0000000000413000-memory.dmp
      Filesize

      76KB

      Download
    • memory/1716-57-0x0000000000400000-0x0000000000413000-memory.dmp
      Filesize

      76KB

      Download
    • memory/1716-58-0x0000000000402E94-mapping.dmp
      Download
    • memory/1716-61-0x0000000000400000-0x0000000000413000-memory.dmp
      Filesize

      76KB

      Download
    • memory/1716-62-0x0000000000400000-0x0000000000413000-memory.dmp
      Filesize

      76KB

      Download
    • memory/1820-63-0x0000000000000000-mapping.dmp
      Download
    • memory/1972-54-0x00000000759F1000-0x00000000759F3000-memory.dmp
      Filesize

      8KB

      Download