Analysis

  • max time kernel
    140s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-06-2023 08:31

General

  • Target

    INV_PKEX0521219.exe

  • Size

    72KB

  • MD5

    f50c01b28f63ea3a2f9eda5d3f62cafc

  • SHA1

    15194fbd3471810bf689da9efeb57efdd4e4f21b

  • SHA256

    0e7012a66e5d3c6ada99f6dcf651fc8a29f31aa74083f76ee96992df0be54ffa

  • SHA512

    98bd8ce28d997815f135b0a73af05cd45d8bdde9d7a018311d7082ee76c3adca78b62ed161fc187febed6037aa556309cfaf13b2a29b1bd65c4a759e8fd5a8f5

  • SSDEEP

    1536:Ua3eJtxKnsYsEMINcTa7FFrj3Pxx1Px90:Ua3ez4sKNykrjfxxpxi

Malware Config

Extracted

Family

purecrypter

C2

http://172.245.191.17/000/Gjvbeqdycii.png

Extracted

Family

snakekeylogger

Credentials

Signatures

  • PureCrypter

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

  • Snake Keylogger

    Keylogger and Infostealer first seen in November 2020.

  • Snake Keylogger payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\INV_PKEX0521219.exe
    "C:\Users\Admin\AppData\Local\Temp\INV_PKEX0521219.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4920
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMwAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4800
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:936

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_eazqklmi.i2x.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/936-171-0x0000000005100000-0x0000000005110000-memory.dmp

    Filesize

    64KB

  • memory/936-170-0x0000000005E70000-0x0000000006032000-memory.dmp

    Filesize

    1.8MB

  • memory/936-169-0x0000000005100000-0x0000000005110000-memory.dmp

    Filesize

    64KB

  • memory/936-168-0x0000000004DE0000-0x0000000004E7C000-memory.dmp

    Filesize

    624KB

  • memory/936-166-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/4800-149-0x0000000006240000-0x00000000062A6000-memory.dmp

    Filesize

    408KB

  • memory/4800-156-0x0000000008070000-0x00000000086EA000-memory.dmp

    Filesize

    6.5MB

  • memory/4800-141-0x0000000003250000-0x0000000003260000-memory.dmp

    Filesize

    64KB

  • memory/4800-142-0x00000000058E0000-0x0000000005F08000-memory.dmp

    Filesize

    6.2MB

  • memory/4800-145-0x0000000006160000-0x00000000061C6000-memory.dmp

    Filesize

    408KB

  • memory/4800-139-0x0000000003260000-0x0000000003296000-memory.dmp

    Filesize

    216KB

  • memory/4800-161-0x0000000003250000-0x0000000003260000-memory.dmp

    Filesize

    64KB

  • memory/4800-154-0x0000000006840000-0x000000000685E000-memory.dmp

    Filesize

    120KB

  • memory/4800-155-0x0000000003250000-0x0000000003260000-memory.dmp

    Filesize

    64KB

  • memory/4800-140-0x0000000003250000-0x0000000003260000-memory.dmp

    Filesize

    64KB

  • memory/4800-157-0x0000000006D40000-0x0000000006D5A000-memory.dmp

    Filesize

    104KB

  • memory/4800-160-0x0000000003250000-0x0000000003260000-memory.dmp

    Filesize

    64KB

  • memory/4800-159-0x0000000003250000-0x0000000003260000-memory.dmp

    Filesize

    64KB

  • memory/4920-158-0x0000000004F20000-0x0000000004F30000-memory.dmp

    Filesize

    64KB

  • memory/4920-133-0x0000000000590000-0x00000000005A2000-memory.dmp

    Filesize

    72KB

  • memory/4920-138-0x0000000008EC0000-0x0000000008EE2000-memory.dmp

    Filesize

    136KB

  • memory/4920-137-0x0000000004F20000-0x0000000004F30000-memory.dmp

    Filesize

    64KB

  • memory/4920-136-0x0000000004F60000-0x0000000004F6A000-memory.dmp

    Filesize

    40KB

  • memory/4920-135-0x0000000004F90000-0x0000000005022000-memory.dmp

    Filesize

    584KB

  • memory/4920-134-0x0000000005540000-0x0000000005AE4000-memory.dmp

    Filesize

    5.6MB