Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    22-09-2021 02:50

General

  • Target

    file.ps1

  • Size

    133KB

  • MD5

    d1da13b36a8ae1ff9bbfb351a7684fb4

  • SHA1

    cfa975bdb93561439ab52527d5041111c1351653

  • SHA256

    23d596e8c826aa53a88baec225080b6f7d298568f2302b4b419ae57f4724914b

  • SHA512

    afa85364c76b168da16b50d74bb14c8f0bf4a77ce4dd1ac6a1462851b5e97342cf435a11ac4fae1283284d7035e554618db0d682376cf7aa87582c499e1c77b9

Score
10/10

Malware Config

Signatures

  • DoubleBack

    DoubleBack is a modular backdoor first seen in December 2020.

  • DoubleBack x64 Payload 2 IoCs
  • Blocklisted process makes network request 4 IoCs
  • Modifies registry class 23 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\file.ps1
    1⤵
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1820
    • C:\Windows\system32\msiexec.exe
      C:\Windows\system32\msiexec.exe
      2⤵
      • Blocklisted process makes network request
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1656
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -c "&{$v1='5725';$k1='hkcu:\Software\Classes\CLSID';$p1=(gp $k1).$v1;rp $k1 $v1;set-itemproperty -pat $k1 -n $v1 -va (($p1|iex)|out-string);exit}"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:744

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheIndex
    MD5

    765c2233611e13e5c0b9954e38d24e1f

    SHA1

    6e4576654f687a623b8a8efec1f63b090bc5f1b8

    SHA256

    560299d5f15a51b477ad26f4ec3a578f0c926a7b2379350e849d7d9d3094bf9e

    SHA512

    6a37f630c55ada1ac2baf9e1867836ea56ffb42910e4962b9a728af7dccf28da612930270c8930c5c602cf417d320c04f95a94a90f4eb6cc485a08d07f1e85e3

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
    MD5

    f1721d05fb12b4317c7215a866392d21

    SHA1

    b79cb6e990c1d1ef28c308eb03a2bea5ba4f93d1

    SHA256

    3b11d642efa9cf16f29665f17955a46ca94a4f1bebab10d31dafd88ea1576f6d

    SHA512

    b6a64f5125e5aaad4c679fb5beef793cc7428a8d545380469845dc77417afe4ac4fa7d859a8ce816af8949b09136060a97178722d3ed4f9ff91b311c57af75a2

  • memory/744-73-0x0000000000000000-mapping.dmp
  • memory/744-84-0x000000001C380000-0x000000001C381000-memory.dmp
    Filesize

    4KB

  • memory/744-83-0x000000001AB00000-0x000000001AB01000-memory.dmp
    Filesize

    4KB

  • memory/744-81-0x000000001AA84000-0x000000001AA86000-memory.dmp
    Filesize

    8KB

  • memory/744-80-0x000000001AA80000-0x000000001AA82000-memory.dmp
    Filesize

    8KB

  • memory/744-79-0x0000000002470000-0x0000000002471000-memory.dmp
    Filesize

    4KB

  • memory/744-78-0x00000000023C0000-0x00000000023C1000-memory.dmp
    Filesize

    4KB

  • memory/744-77-0x000000001AC10000-0x000000001AC11000-memory.dmp
    Filesize

    4KB

  • memory/744-76-0x00000000022F0000-0x00000000022F1000-memory.dmp
    Filesize

    4KB

  • memory/1820-66-0x0000000001E50000-0x0000000001E51000-memory.dmp
    Filesize

    4KB

  • memory/1820-72-0x000000001ABF0000-0x000000001ABFA000-memory.dmp
    Filesize

    40KB

  • memory/1820-71-0x0000008800000000-0x000000880000D000-memory.dmp
    Filesize

    52KB

  • memory/1820-70-0x000000001AC5C000-0x000000001AC7B000-memory.dmp
    Filesize

    124KB

  • memory/1820-69-0x000000001AC56000-0x000000001AC58000-memory.dmp
    Filesize

    8KB

  • memory/1820-68-0x000000001A8A0000-0x000000001A8A1000-memory.dmp
    Filesize

    4KB

  • memory/1820-67-0x000000001C640000-0x000000001C641000-memory.dmp
    Filesize

    4KB

  • memory/1820-60-0x000007FEFBED1000-0x000007FEFBED3000-memory.dmp
    Filesize

    8KB

  • memory/1820-65-0x0000000002460000-0x0000000002461000-memory.dmp
    Filesize

    4KB

  • memory/1820-62-0x000000001AC50000-0x000000001AC52000-memory.dmp
    Filesize

    8KB

  • memory/1820-64-0x000000001AC54000-0x000000001AC56000-memory.dmp
    Filesize

    8KB

  • memory/1820-63-0x000000001ACD0000-0x000000001ACD1000-memory.dmp
    Filesize

    4KB

  • memory/1820-61-0x0000000002420000-0x0000000002421000-memory.dmp
    Filesize

    4KB