Analysis

  • max time kernel
    149s
  • max time network
    37s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    23-02-2023 12:20

General

  • Target

    30b5426ee9183f43fba9a8a6b6b32b97.exe

  • Size

    25KB

  • MD5

    30b5426ee9183f43fba9a8a6b6b32b97

  • SHA1

    d0b8cde6d8c38e294ce6275b0f935677b07d2202

  • SHA256

    e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0

  • SHA512

    adef79c0748b1e8c274f93879c1c068e0d54b88de94fbb01d4d51bd222a6493f8d2cc68f53adab5407bd59249dfa2fdbc8f511bbec3613772591b0ea4d79afaf

  • SSDEEP

    96:jFQgbeIBVLyrgoJ/sTfNILBevmXR5MMRWnwLoLEk8LfjNiRB4e3T3ew5tvEzNt:jFhyIaUo/sTfNILwEfdRTLat8LLGTvu

Malware Config

Extracted

Family

purecrypter

C2

http://argentum.com.br/well-known/acme-challenge/k/h/d/g/Pjogwzrhh.bmp

Signatures

  • Detects Smokeloader packer 3 IoCs
  • PureCrypter

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

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\30b5426ee9183f43fba9a8a6b6b32b97.exe
    "C:\Users\Admin\AppData\Local\Temp\30b5426ee9183f43fba9a8a6b6b32b97.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1676
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1064
    • C:\Users\Admin\AppData\Local\Temp\30b5426ee9183f43fba9a8a6b6b32b97.exe
      C:\Users\Admin\AppData\Local\Temp\30b5426ee9183f43fba9a8a6b6b32b97.exe
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:1544

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1064-64-0x0000000002760000-0x00000000027A0000-memory.dmp

    Filesize

    256KB

  • memory/1064-60-0x0000000002760000-0x00000000027A0000-memory.dmp

    Filesize

    256KB

  • memory/1064-62-0x0000000002760000-0x00000000027A0000-memory.dmp

    Filesize

    256KB

  • memory/1064-61-0x0000000002760000-0x00000000027A0000-memory.dmp

    Filesize

    256KB

  • memory/1064-65-0x0000000002760000-0x00000000027A0000-memory.dmp

    Filesize

    256KB

  • memory/1208-71-0x00000000029A0000-0x00000000029B6000-memory.dmp

    Filesize

    88KB

  • memory/1544-66-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/1544-67-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/1544-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1544-69-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/1544-70-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/1544-72-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/1676-57-0x0000000000350000-0x000000000035C000-memory.dmp

    Filesize

    48KB

  • memory/1676-54-0x0000000000E20000-0x0000000000E2C000-memory.dmp

    Filesize

    48KB

  • memory/1676-56-0x0000000005790000-0x0000000005836000-memory.dmp

    Filesize

    664KB

  • memory/1676-55-0x0000000004A40000-0x0000000004A80000-memory.dmp

    Filesize

    256KB

  • memory/1676-63-0x0000000004A40000-0x0000000004A80000-memory.dmp

    Filesize

    256KB