Analysis

  • max time kernel
    145s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    20/03/2024, 02:35

General

  • Target
    9663cb27096c5592837253411ddee56a54b84b1851cd77e7b33768091ef26fa2.exe
  • Size 16KB
  • Sample240320-c3c8raeg63
  • SHA256 9663cb27096c5592837253411ddee56a54b84b1851cd77e7b33768091ef26fa2
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • purecrypter

C2
  • http://41.216.183.153/no/dontlook/re/research/Kofdzsxxr.mp3

Signatures

  • Detect ZGRat V1 35 IoCs
  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • Suspicious use of NtCreateUserProcessOtherParentProcess 2 IoCs
  • ZGRat

    ZGRat is remote access trojan written in C#.

  • Executes dropped EXE 2 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 9 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Windows\System32\RuntimeBroker.exe
    C:\Windows\System32\RuntimeBroker.exe -Embedding
    1⤵
      PID:3880
      • C:\Users\Admin\AppData\Local\Temp\9663cb27096c5592837253411ddee56a54b84b1851cd77e7b33768091ef26fa2.exe
        "C:\Users\Admin\AppData\Local\Temp\9663cb27096c5592837253411ddee56a54b84b1851cd77e7b33768091ef26fa2.exe"
        2⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:4780
      • C:\Users\Admin\AppData\Local\Method\mjypw\NumberDecimalDigits.exe
        "C:\Users\Admin\AppData\Local\Method\mjypw\NumberDecimalDigits.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3176
        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe
          C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1608
    • C:\Users\Admin\AppData\Local\Temp\9663cb27096c5592837253411ddee56a54b84b1851cd77e7b33768091ef26fa2.exe
      "C:\Users\Admin\AppData\Local\Temp\9663cb27096c5592837253411ddee56a54b84b1851cd77e7b33768091ef26fa2.exe"
      1⤵
      • Suspicious use of NtCreateUserProcessOtherParentProcess
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1444
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -enc QQBkAGQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEMAOgBcAFUAcwBlAHIAcwBcAEEAZABtAGkAbgBcAEEAcABwAEQAYQB0AGEAXABMAG8AYwBhAGwALABDADoAXABVAHMAZQByAHMAXABBAGQAbQBpAG4AXABBAHAAcABEAGEAdABhAFwATABvAGMAYQBsAFwAVABlAG0AcABcADsAIABBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAHIAbwBjAGUAcwBzACAATgB1AG0AYgBlAHIARABlAGMAaQBtAGEAbABEAGkAZwBpAHQAcwAuAGUAeABlADsA
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4172
    • C:\Users\Admin\AppData\Local\Method\mjypw\NumberDecimalDigits.exe
      C:\Users\Admin\AppData\Local\Method\mjypw\NumberDecimalDigits.exe
      1⤵
      • Suspicious use of NtCreateUserProcessOtherParentProcess
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3556
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -enc QQBkAGQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEMAOgBcAFUAcwBlAHIAcwBcAEEAZABtAGkAbgBcAEEAcABwAEQAYQB0AGEAXABMAG8AYwBhAGwALABDADoAXABVAHMAZQByAHMAXABBAGQAbQBpAG4AXABBAHAAcABEAGEAdABhAFwATABvAGMAYQBsAFwAVABlAG0AcABcADsAIABBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAHIAbwBjAGUAcwBzACAATgB1AG0AYgBlAHIARABlAGMAaQBtAGEAbABEAGkAZwBpAHQAcwAuAGUAeABlADsA
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3152

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          NumberDecimalDigits.exe

          • Path C:\Users\Admin\AppData\Local\Method\mjypw\NumberDecimalDigits.exe
          • Size 16KB
          • SHA256 9663cb27096c5592837253411ddee56a54b84b1851cd77e7b33768091ef26fa2
          • MD5 SHA1 SHA512 SSDEEP

          9663cb27096c5592837253411ddee56a54b84b1851cd77e7b33768091ef26fa2.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\9663cb27096c5592837253411ddee56a54b84b1851cd77e7b33768091ef26fa2.exe.log
          • Size 1KB
          • SHA256 4f4290bf42da5f4b18d49c1ee41791db3d83fd7f886cbf792d793b44ca96bb3a
          • MD5 SHA1 SHA512

          powershell.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
          • Size 2KB
          • SHA256 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
          • MD5 SHA1 SHA512

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 944B
          • SHA256 0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888
          • MD5 SHA1 SHA512

          __PSScriptPolicyTest_zdaocmb3.zid.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zdaocmb3.zid.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          memory/1444-63-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-4841-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/1444-5-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-7-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-9-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-11-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-1402-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/1444-17-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-21-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-4830-0x000002AFDE890000-0x000002AFDE891000-memory.dmp

          memory/1444-19-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-25-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-15-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-27-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-29-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-31-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-33-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-35-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-37-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-39-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-41-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-43-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-45-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-47-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-51-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-53-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-49-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-55-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-57-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-59-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-61-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-3-0x000002AFF71A0000-0x000002AFF744A000-memory.dmp

          memory/1444-67-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-65-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-13-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-4-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-23-0x000002AFF71A0000-0x000002AFF7444000-memory.dmp

          memory/1444-4831-0x000002AFF7550000-0x000002AFF763C000-memory.dmp

          memory/1444-4832-0x000002AFDE8A0000-0x000002AFDE8EC000-memory.dmp

          memory/1444-4833-0x000002AFF7640000-0x000002AFF7694000-memory.dmp

          memory/1444-1996-0x000002AFF7040000-0x000002AFF7050000-memory.dmp

          memory/1444-0-0x000002AFDCB60000-0x000002AFDCB68000-memory.dmp

          memory/1444-1-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/1444-2-0x000002AFF7040000-0x000002AFF7050000-memory.dmp

          memory/1608-14154-0x0000025432830000-0x0000025432840000-memory.dmp

          memory/1608-14155-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/3152-14170-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/3152-14158-0x0000028321350000-0x0000028321360000-memory.dmp

          memory/3152-14168-0x0000028321350000-0x0000028321360000-memory.dmp

          memory/3152-14157-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/3176-11926-0x00000208B3400000-0x00000208B3410000-memory.dmp

          memory/3176-14153-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/3176-11925-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/3556-7090-0x00000199C3980000-0x00000199C3990000-memory.dmp

          memory/3556-7089-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/3556-14151-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/3556-11917-0x00000199C3900000-0x00000199C3901000-memory.dmp

          memory/3556-9341-0x00000199C3980000-0x00000199C3990000-memory.dmp

          memory/3556-8751-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/4172-7086-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/4172-7073-0x0000029EFD130000-0x0000029EFD140000-memory.dmp

          memory/4172-7079-0x0000029EFD140000-0x0000029EFD162000-memory.dmp

          memory/4172-7072-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/4172-7083-0x0000029EFD130000-0x0000029EFD140000-memory.dmp

          memory/4780-4842-0x000001AC7FD80000-0x000001AC7FE66000-memory.dmp

          memory/4780-4843-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp

          memory/4780-4844-0x000001AC7FEB0000-0x000001AC7FEC0000-memory.dmp

          memory/4780-4840-0x0000000140000000-0x000000014009A000-memory.dmp

          memory/4780-7069-0x000001AC00730000-0x000001AC00786000-memory.dmp

          memory/4780-7071-0x00007FFFD9BB0000-0x00007FFFDA672000-memory.dmp