Analysis

  • max time kernel
    51s
  • max time network
    178s
  • platform
    windows10-1703_x64
  • resource
    win10-20230220-it
  • resource tags

    arch:x64arch:x86image:win10-20230220-itlocale:it-itos:windows10-1703-x64systemwindows
  • submitted
    25-03-2023 14:13

General

  • Target

    lower.exe

  • Size

    439KB

  • MD5

    aaa7586b2e64363b85571195a01b14e9

  • SHA1

    734ccb31e72b9cb123f78c2ada870a11759e5e12

  • SHA256

    53828b4c45798c42a15c42d20cf65a705ec534e28ec86cc5d6312afb2d0a7e9d

  • SHA512

    bc94a9aea0002e58360278efbffc41d9ec3b99514692a5cdfc6264335efc5a1ab1c9e8fdc24a7dfa050a889427e577abfa7add10fbc319cad04d77604ebeeee8

  • SSDEEP

    3072:QlsbVPQBHdThnjOwNUystMRdFAq6Ujq1fFTbpqdvH3DF/q1RiJCkGKU8x8vOmbwc:qywe3UjQTb4l3xg2CxKU8x8nMeF4SwO

Score
10/10

Malware Config

Extracted

Family

gcleaner

C2

45.12.253.56

45.12.253.72

45.12.253.98

45.12.253.75

Signatures

  • GCleaner

    GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 9 IoCs
  • Kills process with taskkill 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\lower.exe
    "C:\Users\Admin\AppData\Local\Temp\lower.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1784
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1784 -s 548
      2⤵
      • Program crash
      PID:2172
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1784 -s 792
      2⤵
      • Program crash
      PID:2120
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1784 -s 812
      2⤵
      • Program crash
      PID:3500
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1784 -s 876
      2⤵
      • Program crash
      PID:4480
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1784 -s 916
      2⤵
      • Program crash
      PID:4700
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1784 -s 1000
      2⤵
      • Program crash
      PID:4844
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1784 -s 1144
      2⤵
      • Program crash
      PID:4904
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1784 -s 1184
      2⤵
      • Program crash
      PID:4928
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1784 -s 1312
      2⤵
      • Program crash
      PID:4188
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "lower.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\lower.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4448
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "lower.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:2656

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

System Information Discovery

1
T1082

Replay Monitor

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Downloads

  • memory/1784-117-0x0000000000650000-0x0000000000690000-memory.dmp
    Filesize

    256KB

  • memory/1784-119-0x0000000000400000-0x00000000004EE000-memory.dmp
    Filesize

    952KB