Analysis

  • max time kernel
    149s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    08/10/2023, 17:31

General

  • Target

    JC_tmp.exe

  • Size

    175KB

  • MD5

    9f322fea404a9934e6c807108ebb2147

  • SHA1

    668174980eb20c9ce530b51e059714bc55a80d25

  • SHA256

    a3e5674bf7c3e285fb88bb0bfc284f3e74ece2706f46168c6da289e6267b96d7

  • SHA512

    2a5c3e87b7199f8b48cc0e8528e5d54052b7d8c596465666b13c4d348413931edf6985bbf3a72dcabdbb88363b4c073958081e534a79fb430ae2c3ddb4dbeb8d

  • SSDEEP

    3072:se8oX8Sb5KcXrtkkXmf/bDsvqtU+lLToChAP0UZ0b2gTewAqE+Wpor:FXtb5KcXr7XmfgqtjhAxZ0b2H

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

https://api.telegram.org/bot6665962723:AAH0nnWqTYyuuRfHTzEtqpxN1oFN6NDMxRY/sendMessage?chat_id=1595024827

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

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
  • Async RAT payload 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops desktop.ini file(s) 7 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.

  • Looks up geolocation information via web service

    Uses a legitimate geolocation service to find the infected system's geolocation info.

  • 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JC_tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\JC_tmp.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2000
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2920
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
          PID:2932
        • C:\Windows\SysWOW64\netsh.exe
          netsh wlan show profile
          3⤵
            PID:2616
          • C:\Windows\SysWOW64\findstr.exe
            findstr All
            3⤵
              PID:2888
          • C:\Windows\SysWOW64\cmd.exe
            "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1956
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              3⤵
                PID:1632
              • C:\Windows\SysWOW64\netsh.exe
                netsh wlan show networks mode=bssid
                3⤵
                  PID:1532

            Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

                    Filesize

                    344B

                    MD5

                    196d57998a1157fcaca45a7ac6b0da11

                    SHA1

                    c160789924fb01c223cde77fb6a5d303e8e9e782

                    SHA256

                    957db488c93aa3dc70c0a25311bfe251374834e1df374658ea5f777a059283de

                    SHA512

                    6af1b611f2885e546fc9c7db703d6bd80c763144b46250d579f6b14c4e4006b8fd3dd52c39d4f72236783d7748f13f47f56dfe97231711dd0cf1593bdee8aace

                  • C:\Users\Admin\AppData\Local\73649f36bbc997b7b16fe3b0c17feddd\msgid.dat

                    Filesize

                    1B

                    MD5

                    cfcd208495d565ef66e7dff9f98764da

                    SHA1

                    b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

                    SHA256

                    5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

                    SHA512

                    31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

                  • C:\Users\Admin\AppData\Local\Temp\Cab8668.tmp

                    Filesize

                    61KB

                    MD5

                    f3441b8572aae8801c04f3060b550443

                    SHA1

                    4ef0a35436125d6821831ef36c28ffaf196cda15

                    SHA256

                    6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

                    SHA512

                    5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

                  • C:\Users\Admin\AppData\Local\Temp\Tar8707.tmp

                    Filesize

                    163KB

                    MD5

                    9441737383d21192400eca82fda910ec

                    SHA1

                    725e0d606a4fc9ba44aa8ffde65bed15e65367e4

                    SHA256

                    bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

                    SHA512

                    7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

                  • C:\Users\Admin\AppData\Local\c75aa083ad9b29dda81f321ba6793d2c\Admin@UUVOHKNL_en-US\Browsers\Firefox\Bookmarks.txt

                    Filesize

                    105B

                    MD5

                    2e9d094dda5cdc3ce6519f75943a4ff4

                    SHA1

                    5d989b4ac8b699781681fe75ed9ef98191a5096c

                    SHA256

                    c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

                    SHA512

                    d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

                  • memory/2000-0-0x0000000000810000-0x0000000000842000-memory.dmp

                    Filesize

                    200KB

                  • memory/2000-1-0x0000000074BB0000-0x000000007529E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2000-2-0x0000000004640000-0x0000000004680000-memory.dmp

                    Filesize

                    256KB

                  • memory/2000-69-0x0000000074BB0000-0x000000007529E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2000-70-0x0000000004640000-0x0000000004680000-memory.dmp

                    Filesize

                    256KB

                  • memory/2000-74-0x0000000004640000-0x0000000004680000-memory.dmp

                    Filesize

                    256KB