Analysis

  • max time kernel
    90s
  • max time network
    124s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    13-07-2021 13:06

General

  • Target

    5f70bb21955777e10ca01ead27d16b44.exe

  • Size

    1.0MB

  • MD5

    5f70bb21955777e10ca01ead27d16b44

  • SHA1

    2f7d8adfb506718346d94177103d1d976380a9b4

  • SHA256

    84c1024292142c4d234701e830aedcbd865311693f0d8ac75596deee268c7db5

  • SHA512

    69f55a7902a4241c008c745a8f3bbc261bf0f9698f0b0b93aafb6ab8ce47b4e0eba47879e32404d6c3cdfab14cf55f60d5de4c34050bcb377f7f92a5a1ed16f4

Malware Config

Signatures

  • A310logger

    A310 Logger is a .NET stealer/logger targeting passwords from browsers and email clients.

  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty Payload 2 IoCs
  • A310logger Executable 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • 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 processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5f70bb21955777e10ca01ead27d16b44.exe
    "C:\Users\Admin\AppData\Local\Temp\5f70bb21955777e10ca01ead27d16b44.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3896
    • C:\Users\Admin\AppData\Local\Temp\5f70bb21955777e10ca01ead27d16b44.exe
      "C:\Users\Admin\AppData\Local\Temp\5f70bb21955777e10ca01ead27d16b44.exe"
      2⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:936
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\PASSWORDSNET4.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\PASSWORDSNET4.exe
        3⤵
        • Executes dropped EXE
        • Checks processor information in registry
        PID:1904
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\CREDITCARDNET4.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\CREDITCARDNET4.exe
        3⤵
        • Executes dropped EXE
        PID:2124

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\CREDITCARDNET4.exe

    MD5

    a451ff83e1e0b66af6a3f26ee38bf4ff

    SHA1

    5dc4535a7a059c3aaedf925093e9fbe5f27aae80

    SHA256

    e654a9462d181c047534462ca3f13c1117886dbeded26cc1c0255328fd1046da

    SHA512

    3d2722dd84783eb806e671fd611b03ea9851e8d266f182088e7e2a7af467ca2b6fd348461117cc7e547bd225be5f748b2c724ea0c7431a3d15d1291355f92a85

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\CREDITCARDNET4.exe

    MD5

    a451ff83e1e0b66af6a3f26ee38bf4ff

    SHA1

    5dc4535a7a059c3aaedf925093e9fbe5f27aae80

    SHA256

    e654a9462d181c047534462ca3f13c1117886dbeded26cc1c0255328fd1046da

    SHA512

    3d2722dd84783eb806e671fd611b03ea9851e8d266f182088e7e2a7af467ca2b6fd348461117cc7e547bd225be5f748b2c724ea0c7431a3d15d1291355f92a85

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\PASSWORDSNET4.exe

    MD5

    1e80e2c7dc321a0f48da92fdbdbd44eb

    SHA1

    4bcf3e9b2e0332e1428779254aaf0b7a1b07b08e

    SHA256

    6dd7c673498c69240586a2344c16dcaefb1229e06fdf2b85b76cd91e5578e291

    SHA512

    dde95e41feca1ac7fc3c86277a2eaa3ac7d96c0bbb31faaea6c8aae680fc1aff1cfbad849660457fdbf69479b4496906dea5edc9ca307625836f483f82b6ca62

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\PASSWORDSNET4.exe

    MD5

    1e80e2c7dc321a0f48da92fdbdbd44eb

    SHA1

    4bcf3e9b2e0332e1428779254aaf0b7a1b07b08e

    SHA256

    6dd7c673498c69240586a2344c16dcaefb1229e06fdf2b85b76cd91e5578e291

    SHA512

    dde95e41feca1ac7fc3c86277a2eaa3ac7d96c0bbb31faaea6c8aae680fc1aff1cfbad849660457fdbf69479b4496906dea5edc9ca307625836f483f82b6ca62

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\credentials.txt

    MD5

    0e426b2995baa0070b9b3aebdf2d6c1b

    SHA1

    156415b4c5b2fa2002021b772590499ab01dc27a

    SHA256

    f4567ff5a9b9ffdc6e7b29d545d9971748a2906232c7127ef8f2a4ea9aacd117

    SHA512

    3f98e50d1ec13694d11cfea33521f040930ffd2a43c865e9510f92354acaad03f06994aa0511d1012ac48bef22b8d59b74a6ce379a040ee8b08bdb600b9a9f68

  • memory/936-125-0x0000000000400000-0x000000000044A000-memory.dmp

    Filesize

    296KB

  • memory/936-135-0x0000000001260000-0x0000000001262000-memory.dmp

    Filesize

    8KB

  • memory/936-126-0x0000000000402D98-mapping.dmp

  • memory/936-128-0x0000000000400000-0x000000000044A000-memory.dmp

    Filesize

    296KB

  • memory/1904-130-0x0000000000000000-mapping.dmp

  • memory/1904-133-0x00000000008A0000-0x00000000008A1000-memory.dmp

    Filesize

    4KB

  • memory/2124-139-0x00000000004E0000-0x00000000004E1000-memory.dmp

    Filesize

    4KB

  • memory/2124-136-0x0000000000000000-mapping.dmp

  • memory/3896-114-0x0000000000860000-0x0000000000861000-memory.dmp

    Filesize

    4KB

  • memory/3896-120-0x0000000005420000-0x0000000005421000-memory.dmp

    Filesize

    4KB

  • memory/3896-119-0x00000000052C0000-0x00000000052C1000-memory.dmp

    Filesize

    4KB

  • memory/3896-121-0x0000000005320000-0x000000000581E000-memory.dmp

    Filesize

    5.0MB

  • memory/3896-124-0x0000000005660000-0x00000000056D1000-memory.dmp

    Filesize

    452KB

  • memory/3896-123-0x000000000AD50000-0x000000000AE05000-memory.dmp

    Filesize

    724KB

  • memory/3896-118-0x0000000005320000-0x0000000005321000-memory.dmp

    Filesize

    4KB

  • memory/3896-117-0x0000000005820000-0x0000000005821000-memory.dmp

    Filesize

    4KB

  • memory/3896-122-0x0000000002B70000-0x0000000002B80000-memory.dmp

    Filesize

    64KB

  • memory/3896-116-0x0000000005140000-0x0000000005141000-memory.dmp

    Filesize

    4KB