Analysis

  • max time kernel
    138s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    25-01-2023 11:51

General

  • Target

    net-helper.exe

  • Size

    14.4MB

  • MD5

    66938c0466b2f359991780e4b7cd0e9c

  • SHA1

    ab99cd7e54472bc77552b63b79b81eef77d5d89e

  • SHA256

    e0954bf1de9f4afc60357d49c5e973a8d0dde1f84b65bd2930296004fa762188

  • SHA512

    b12a37d0d585ec92df015254cbc6e69b4e2beea8b8225dd3c6509b8a479c34702783cbc0bed4145f59f070ff9d4295eeb664382f0b28a9c81808ef3f3f75c877

  • SSDEEP

    196608:xxKVllbuJB4ioxztVyXYVzjoetLvVuN10RGDePP:jQll5zJVy2zjTtrVPRgeP

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Drops file in System32 directory 6 IoCs
  • Drops file in Windows directory 1 IoCs
  • GoLang User-Agent 13 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • Modifies data under HKEY_USERS 42 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\net-helper.exe
    "C:\Users\Admin\AppData\Local\Temp\net-helper.exe"
    1⤵
    • Drops file in Windows directory
    PID:1988
  • C:\Windows\Net Helper\net-helper.exe
    "C:\Windows\Net Helper\net-helper.exe"
    1⤵
    • Executes dropped EXE
    • Drops file in System32 directory
    • Modifies data under HKEY_USERS
    • Modifies system certificate store
    PID:936

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Windows\Net Helper\net-helper.exe
    Filesize

    14.4MB

    MD5

    66938c0466b2f359991780e4b7cd0e9c

    SHA1

    ab99cd7e54472bc77552b63b79b81eef77d5d89e

    SHA256

    e0954bf1de9f4afc60357d49c5e973a8d0dde1f84b65bd2930296004fa762188

    SHA512

    b12a37d0d585ec92df015254cbc6e69b4e2beea8b8225dd3c6509b8a479c34702783cbc0bed4145f59f070ff9d4295eeb664382f0b28a9c81808ef3f3f75c877

  • \Windows\Net Helper\net-helper.exe
    Filesize

    14.4MB

    MD5

    66938c0466b2f359991780e4b7cd0e9c

    SHA1

    ab99cd7e54472bc77552b63b79b81eef77d5d89e

    SHA256

    e0954bf1de9f4afc60357d49c5e973a8d0dde1f84b65bd2930296004fa762188

    SHA512

    b12a37d0d585ec92df015254cbc6e69b4e2beea8b8225dd3c6509b8a479c34702783cbc0bed4145f59f070ff9d4295eeb664382f0b28a9c81808ef3f3f75c877

  • \Windows\Net Helper\net-helper.exe
    Filesize

    14.4MB

    MD5

    66938c0466b2f359991780e4b7cd0e9c

    SHA1

    ab99cd7e54472bc77552b63b79b81eef77d5d89e

    SHA256

    e0954bf1de9f4afc60357d49c5e973a8d0dde1f84b65bd2930296004fa762188

    SHA512

    b12a37d0d585ec92df015254cbc6e69b4e2beea8b8225dd3c6509b8a479c34702783cbc0bed4145f59f070ff9d4295eeb664382f0b28a9c81808ef3f3f75c877