Analysis

  • max time kernel
    45s
  • max time network
    48s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    02-02-2023 19:55

General

  • Target

    e4d9015e2bed3af0480b51231b68bb23.exe

  • Size

    194KB

  • MD5

    e4d9015e2bed3af0480b51231b68bb23

  • SHA1

    c148f8cc0d8930602a00155cc0f370d2e22a811a

  • SHA256

    893f1df3f71f13731482f53655a5f6470ee00eae87f84e31da4af2950df80cef

  • SHA512

    5bc66c3aac2497c2e3df851dc75011cf529a0fd76ab18280a626c4a2975b07e740ed74cbb6afe9b4ea518d4a2772f5783120c3881ff551ef2be14abb0842c665

  • SSDEEP

    6144:+rdOfeBDRzseSmV7v2PCc4gorppZiG73TAW:+rdOfeia79

Malware Config

Signatures

  • Detect PureCrypter injector 1 IoCs
  • PureCrypter

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

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Looks up external IP address via web service 2 IoCs

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

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

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

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e4d9015e2bed3af0480b51231b68bb23.exe
    "C:\Users\Admin\AppData\Local\Temp\e4d9015e2bed3af0480b51231b68bb23.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1884
    • 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:280
    • C:\Users\Admin\AppData\Local\Temp\e4d9015e2bed3af0480b51231b68bb23.exe
      C:\Users\Admin\AppData\Local\Temp\e4d9015e2bed3af0480b51231b68bb23.exe
      2⤵
      • Accesses Microsoft Outlook profiles
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:988
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 988 -s 1880
        3⤵
        • Program crash
        PID:1280

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

System Information Discovery

2
T1082

Query Registry

1
T1012

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/280-59-0x000000006F320000-0x000000006F8CB000-memory.dmp
    Filesize

    5.7MB

  • memory/280-61-0x000000006F320000-0x000000006F8CB000-memory.dmp
    Filesize

    5.7MB

  • memory/280-60-0x000000006F320000-0x000000006F8CB000-memory.dmp
    Filesize

    5.7MB

  • memory/280-57-0x0000000000000000-mapping.dmp
  • memory/988-63-0x0000000000400000-0x00000000004D8000-memory.dmp
    Filesize

    864KB

  • memory/988-71-0x0000000000400000-0x00000000004D8000-memory.dmp
    Filesize

    864KB

  • memory/988-76-0x0000000007FD0000-0x0000000008082000-memory.dmp
    Filesize

    712KB

  • memory/988-75-0x00000000008A0000-0x00000000008AE000-memory.dmp
    Filesize

    56KB

  • memory/988-73-0x0000000000400000-0x00000000004D8000-memory.dmp
    Filesize

    864KB

  • memory/988-64-0x0000000000400000-0x00000000004D8000-memory.dmp
    Filesize

    864KB

  • memory/988-66-0x0000000000400000-0x00000000004D8000-memory.dmp
    Filesize

    864KB

  • memory/988-67-0x0000000000400000-0x00000000004D8000-memory.dmp
    Filesize

    864KB

  • memory/988-68-0x0000000000400000-0x00000000004D8000-memory.dmp
    Filesize

    864KB

  • memory/988-69-0x00000000004D215E-mapping.dmp
  • memory/1280-77-0x0000000000000000-mapping.dmp
  • memory/1884-56-0x00000000072E0000-0x00000000075E4000-memory.dmp
    Filesize

    3.0MB

  • memory/1884-54-0x0000000001340000-0x0000000001376000-memory.dmp
    Filesize

    216KB

  • memory/1884-62-0x0000000005A60000-0x0000000005B54000-memory.dmp
    Filesize

    976KB

  • memory/1884-55-0x0000000075201000-0x0000000075203000-memory.dmp
    Filesize

    8KB