Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-10-2024 16:07

General

  • Target

    b9070dcf9e13ebd0187be2084de4c3fe485cd4d38a8bc7a94420fc744fac4ba7.exe

  • Size

    263KB

  • MD5

    885c72a729b202512aadc7c7a69d129d

  • SHA1

    aa79d439039050d55e6c01d116926ee3852c8d34

  • SHA256

    b9070dcf9e13ebd0187be2084de4c3fe485cd4d38a8bc7a94420fc744fac4ba7

  • SHA512

    52fd34ef5cde4ee8618774f69c8989e3e5431c2eccd226fa1b06382ad423ca897d5ba374c2ed1720fea0c58e777f41ba435e02867d446a216b1871933fd25a0b

  • SSDEEP

    6144:IDKW1Lgbdl0TBBvjc/DnMugecPSgoUS/ySQha:Oh1Lk70TnvjcwugDLkySt

Malware Config

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • StormKitty

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

  • StormKitty payload 2 IoCs
  • .NET Reactor proctector 31 IoCs

    Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Drops desktop.ini file(s) 8 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 2 IoCs

    Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 25 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b9070dcf9e13ebd0187be2084de4c3fe485cd4d38a8bc7a94420fc744fac4ba7.exe
    "C:\Users\Admin\AppData\Local\Temp\b9070dcf9e13ebd0187be2084de4c3fe485cd4d38a8bc7a94420fc744fac4ba7.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4476
    • C:\Users\Admin\AppData\Local\Temp\Build_Crystal_Stealer.exe
      "C:\Users\Admin\AppData\Local\Temp\Build_Crystal_Stealer.exe"
      2⤵
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • System Location Discovery: System Language Discovery
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3816
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Wi-Fi Discovery
        • Suspicious use of WriteProcessMemory
        PID:2912
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:1640
        • C:\Windows\SysWOW64\netsh.exe
          netsh wlan show profile
          4⤵
          • Event Triggered Execution: Netsh Helper DLL
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Wi-Fi Discovery
          PID:3156
        • C:\Windows\SysWOW64\findstr.exe
          findstr All
          4⤵
          • System Location Discovery: System Language Discovery
          PID:952
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1752
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4720
        • C:\Windows\SysWOW64\netsh.exe
          netsh wlan show networks mode=bssid
          4⤵
          • Event Triggered Execution: Netsh Helper DLL
          • System Location Discovery: System Language Discovery
          PID:3112

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Build_Crystal_Stealer.exe

    Filesize

    162KB

    MD5

    5e9c072eeea44c2bdaa746eefd4eb1e0

    SHA1

    d62dc2728656cb3d2de02a6abf8b75e94d9fb698

    SHA256

    3df27764bca3f7bffe8e7fbfc62cf2e88b084077e1216cfd1049e922bb4b73c0

    SHA512

    03d0258fb5cf0ef78350808e75db6912eccb73ce3e60db916ca7fa5ad36d2da31bcf75628d07242a543530737d9e5154f933d15e9c3a84cde7be8f090ab7379d

  • C:\Users\Admin\AppData\Local\b7518339e437082f220ef3d4b601feb9\Admin@ERHQJVYQ_en-US\Browsers\Firefox\Bookmarks.txt

    Filesize

    105B

    MD5

    2e9d094dda5cdc3ce6519f75943a4ff4

    SHA1

    5d989b4ac8b699781681fe75ed9ef98191a5096c

    SHA256

    c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

    SHA512

    d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

  • C:\Users\Admin\AppData\Local\b7518339e437082f220ef3d4b601feb9\Admin@ERHQJVYQ_en-US\System\Process.txt

    Filesize

    4KB

    MD5

    e2037dae2419f02930e7c833d257c72a

    SHA1

    142aafe0c5df942903ec393941f6ebbd55a4d0fd

    SHA256

    d793ae00c3de2e0e80386f8ad48ce71bc89ac2fca6e30c99319143b0204e0fab

    SHA512

    1e79d191ef7e0c242edac27be7a4177b8bb75ed6f6001079752498e97d2fdb9cc9beabaa2965f849d5b40f2045a87fe5da431c82ce66639e00fa9d0a94b9508c

  • C:\Users\Admin\AppData\Local\df4a22ee210f0651e0f96cfed7d44fe6\msgid.dat

    Filesize

    1B

    MD5

    cfcd208495d565ef66e7dff9f98764da

    SHA1

    b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

    SHA256

    5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

    SHA512

    31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

  • memory/3816-223-0x0000000074C90000-0x0000000075440000-memory.dmp

    Filesize

    7.7MB

  • memory/3816-225-0x00000000060C0000-0x0000000006152000-memory.dmp

    Filesize

    584KB

  • memory/3816-229-0x00000000061B0000-0x00000000061BA000-memory.dmp

    Filesize

    40KB

  • memory/3816-215-0x0000000074C90000-0x0000000075440000-memory.dmp

    Filesize

    7.7MB

  • memory/3816-235-0x0000000007000000-0x0000000007012000-memory.dmp

    Filesize

    72KB

  • memory/3816-194-0x0000000074C90000-0x0000000075440000-memory.dmp

    Filesize

    7.7MB

  • memory/3816-260-0x0000000074C90000-0x0000000075440000-memory.dmp

    Filesize

    7.7MB

  • memory/3816-81-0x00000000055A0000-0x0000000005606000-memory.dmp

    Filesize

    408KB

  • memory/3816-80-0x0000000074C90000-0x0000000075440000-memory.dmp

    Filesize

    7.7MB

  • memory/3816-79-0x0000000074C90000-0x0000000075440000-memory.dmp

    Filesize

    7.7MB

  • memory/3816-77-0x0000000000CE0000-0x0000000000D0E000-memory.dmp

    Filesize

    184KB

  • memory/4476-42-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-5-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-34-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-32-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-30-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-26-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-24-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-22-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-20-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-60-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-18-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-14-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-12-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-10-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-8-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-54-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-28-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-16-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-6-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-36-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-62-0x0000000074C90000-0x0000000075440000-memory.dmp

    Filesize

    7.7MB

  • memory/4476-63-0x0000000004B40000-0x0000000004BDC000-memory.dmp

    Filesize

    624KB

  • memory/4476-64-0x0000000074C90000-0x0000000075440000-memory.dmp

    Filesize

    7.7MB

  • memory/4476-38-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-41-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-0-0x0000000074C9E000-0x0000000074C9F000-memory.dmp

    Filesize

    4KB

  • memory/4476-44-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-78-0x0000000074C90000-0x0000000075440000-memory.dmp

    Filesize

    7.7MB

  • memory/4476-48-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-50-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-56-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-58-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-61-0x0000000074C90000-0x0000000075440000-memory.dmp

    Filesize

    7.7MB

  • memory/4476-52-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-46-0x0000000002470000-0x000000000249B000-memory.dmp

    Filesize

    172KB

  • memory/4476-4-0x0000000002470000-0x00000000024A2000-memory.dmp

    Filesize

    200KB

  • memory/4476-3-0x0000000004C50000-0x00000000051F4000-memory.dmp

    Filesize

    5.6MB

  • memory/4476-2-0x0000000074C90000-0x0000000075440000-memory.dmp

    Filesize

    7.7MB

  • memory/4476-1-0x0000000002400000-0x0000000002432000-memory.dmp

    Filesize

    200KB