Analysis

  • max time kernel
    146s
  • max time network
    54s
  • platform
    windows7_x64
  • resource
    win7v200722
  • submitted
    14-08-2020 01:40

General

  • Target

    paulo.exe

  • Size

    2.3MB

  • MD5

    550b37b4d263f0fcb4e16f999e19a7f8

  • SHA1

    e8598cadf6dc079756ff7e322092c540711c34cc

  • SHA256

    3ccfba4ea524addfcbe7be67231761b6c066e030d25a5ad45d2d20a8d8deb1d1

  • SHA512

    bb38ccc6be0286dbe3b84d87274013d722a4a40802021f4712f4e5c2787d1e08275ac15e1a1c8dfda6867d7f8fb7c3003939d66158a6b4ddb8c13dc05915504b

Malware Config

Signatures

  • Echelon

    Echelon is a .NET stealer that targets passwords from browsers, email and cryptocurrency clients.

  • Echelon log file 1 IoCs

    Detects a log file produced by Echelon.

  • Loads dropped DLL 1 IoCs
  • Obfuscated with Agile.Net obfuscator 1 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 12 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 24 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\paulo.exe
    "C:\Users\Admin\AppData\Local\Temp\paulo.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1608
    • C:\Users\Admin\AppData\Local\Temp\paulo.exe
      "C:\Users\Admin\AppData\Local\Temp\paulo.exe"
      2⤵
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1816

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

Collection

Data from Local System

1
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • \Users\Admin\AppData\Local\Temp\305ca9ce-05a7-4081-bcf5-b3110c43e68e\l.dll
    MD5

    14ff402962ad21b78ae0b4c43cd1f194

    SHA1

    f8a510eb26666e875a5bdd1cadad40602763ad72

    SHA256

    fb9646cb956945bdc503e69645f6b5316d3826b780d3c36738d6b944e884d15b

    SHA512

    daa7a08bf3709119a944bce28f6ebdd24e54a22b18cd9f86a87873e958df121a3881dcdd5e162f6b4e543238c7aef20f657c9830df01d4c79290f7c9a4fcc54b

  • memory/1608-0-0x0000000074E80000-0x000000007556E000-memory.dmp
    Filesize

    6.9MB

  • memory/1608-1-0x00000000003F0000-0x00000000003F1000-memory.dmp
    Filesize

    4KB

  • memory/1608-3-0x00000000003C0000-0x00000000003DC000-memory.dmp
    Filesize

    112KB

  • memory/1608-5-0x0000000000680000-0x0000000000683000-memory.dmp
    Filesize

    12KB

  • memory/1816-6-0x0000000000400000-0x0000000000532000-memory.dmp
    Filesize

    1.2MB

  • memory/1816-7-0x000000000052CCD2-mapping.dmp
  • memory/1816-8-0x0000000000100000-0x0000000000232000-memory.dmp
    Filesize

    1.2MB

  • memory/1816-9-0x0000000000100000-0x0000000000232000-memory.dmp
    Filesize

    1.2MB

  • memory/1816-10-0x0000000074E80000-0x000000007556E000-memory.dmp
    Filesize

    6.9MB

  • memory/1816-11-0x0000000000100000-0x0000000000102000-memory.dmp
    Filesize

    8KB