Overview

overview

10

Static

static

10

foo.exe

windows7_x64

10

foo.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    619s
  • max time network
    620s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    17-02-2022 00:54

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General

  • Target

    foo.exe

  • Size

    94KB

  • MD5

    993b73d6490bc5a7e23e02210b317247

  • SHA1

    6fd314af34409e945504e166eb8cd88127c1070e

  • SHA256

    de04d2402154f676f757cf1380671f396f3fc9f7dbb683d9461edd2718c4e09d

  • SHA512

    417f55a066896695ce1b8d998767f706005d3d6f1792f2b86261a235034a6c3bb1deae6920857fbc710d22b833479b2cbeafd92735381f1cc357adcc8a74c55d

Score
10/10
netwalkerpersistenceransomware

Malware Config

Signatures

  • Detected Netwalker Ransomware 2 IoCs

    Detected unpacked Netwalker executable.

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

    ransomwarenetwalker
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Modifies extensions of user files 2 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Deletes itself 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

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

    ransomware
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\foo.exe
    "C:\Users\Admin\AppData\Local\Temp\foo.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:1532
    • C:\Windows\SysWOW64\explorer.exe
      "C:\Windows\system32\explorer.exe"
      2⤵
      • Modifies extensions of user files
      • Deletes itself
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1732
      • C:\Windows\SysWOW64\explorer.exe
        "C:\Windows\system32\explorer.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1100
        • C:\Windows\system32\vssadmin.exe
          C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:1368
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:628

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

Impact

Inhibit System Recovery

2
T1490

Replay Monitor

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Downloads

  • memory/1100-61-0x00000000000D0000-0x00000000000EB000-memory.dmp
    Filesize

    108KB

    Download
  • memory/1532-55-0x0000000076851000-0x0000000076853000-memory.dmp
    Filesize

    8KB

    Download
  • memory/1732-57-0x00000000754B1000-0x00000000754B3000-memory.dmp
    Filesize

    8KB

    Download
  • memory/1732-58-0x0000000000080000-0x000000000009B000-memory.dmp
    Filesize

    108KB

    Download