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Analysis

  • max time kernel
    140s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    22/04/2024, 02:41

General

  • Target

    bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe

  • Size

    216KB

  • MD5

    49a21a87f5b39acab9a20a104f02e7b6

  • SHA1

    4672aee46df932707920206e0b291ada977c124f

  • SHA256

    bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e

  • SHA512

    072d1c4de957d93255ed81ffc10031fcf5110e40306d6dd9c7cba30920cf16c1edd0724b8c19dcff65ed043eb45823a04cdaf30c5e84cf4419622d5d4a757690

  • SSDEEP

    3072:SPUHpiKT2t2UHIu05W7SAFJJOUD9cckiKop97f3r8n9t9Ygntw+:/rTfUHeeSKOS9ccFKk3Y9t9YZ+

Malware Config

Signatures

  • UPX dump on OEP (original entry point) 20 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe
    "C:\Users\Admin\AppData\Local\Temp\bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2268
    • C:\Users\Public\Microsoft Build\Isass.exe
      "C:\Users\Public\Microsoft Build\Isass.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:1680

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Public\Microsoft Build\Isass.exe

    Filesize

    216KB

    MD5

    49a21a87f5b39acab9a20a104f02e7b6

    SHA1

    4672aee46df932707920206e0b291ada977c124f

    SHA256

    bfc21c49c19a898c9fd39001e721c03634ebd0fb7a800170e20a74f61177164e

    SHA512

    072d1c4de957d93255ed81ffc10031fcf5110e40306d6dd9c7cba30920cf16c1edd0724b8c19dcff65ed043eb45823a04cdaf30c5e84cf4419622d5d4a757690

  • memory/1680-26-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-35-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-74-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-12-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-13-0x00000000003B0000-0x00000000003B1000-memory.dmp

    Filesize

    4KB

  • memory/1680-14-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-15-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-18-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-19-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-36-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-62-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-27-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-61-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-42-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-43-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-50-0x00000000045B0000-0x0000000005859000-memory.dmp

    Filesize

    18.7MB

  • memory/1680-51-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/1680-52-0x00000000045B0000-0x0000000005859000-memory.dmp

    Filesize

    18.7MB

  • memory/1680-53-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/2268-7-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB

  • memory/2268-11-0x0000000004660000-0x0000000005909000-memory.dmp

    Filesize

    18.7MB

  • memory/2268-10-0x0000000000400000-0x00000000016A8E52-memory.dmp

    Filesize

    18.7MB