Analysis

  • max time kernel
    149s
  • max time network
    136s
  • platform
    windows10-1703_x64
  • resource
    win10-20231215-en
  • resource tags

    arch:x64arch:x86image:win10-20231215-enlocale:en-usos:windows10-1703-x64system
  • submitted
    28-01-2024 22:39

General

  • Target

    build.exe

  • Size

    1.6MB

  • MD5

    250114fc325e32139aa68c458e697830

  • SHA1

    af892053b7b94d33167e103dcd832aa066d68192

  • SHA256

    55dcd1490fe7d1f7fb0ada01cc79b3e2b113ac16a5e8d09c926ccb399a0f2f49

  • SHA512

    79e8c65a3d46409cdeb138b26c9b8d098131d0ad86eb17b5db67ec95525a8754765e75e2f2f29c37de7ec3af829eb774f239667aedbc00aef5869df34d0f52a9

  • SSDEEP

    49152:7kTq24GjdGSiqkqXfd+/9AqYanieKdsE:71EjdGSiqkqXf0FLYW

Malware Config

Extracted

Family

stealerium

C2

https://discord.com/api/webhooks/1201288796562538517/o6-Ku-dNscXZhObTEtbm_lFKoJJYFvSFSt6SoCwEtsOVekRR7aaNTA4KxzGGcBqj_FIA

Signatures

  • Stealerium

    An open source info stealer written in C# first seen in May 2022.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Legitimate hosting services abused for malware hosting/C2 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.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\build.exe
    "C:\Users\Admin\AppData\Local\Temp\build.exe"
    1⤵
    • Accesses Microsoft Outlook profiles
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    • outlook_office_path
    • outlook_win_path
    PID:596
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4268
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
          PID:2192
        • C:\Windows\SysWOW64\netsh.exe
          netsh wlan show profile
          3⤵
            PID:3988
          • C:\Windows\SysWOW64\findstr.exe
            findstr All
            3⤵
              PID:4352
          • C:\Windows\SysWOW64\cmd.exe
            "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:4120
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              3⤵
                PID:3504
              • C:\Windows\SysWOW64\netsh.exe
                netsh wlan show networks mode=bssid
                3⤵
                  PID:3712
            • C:\Windows\system32\msiexec.exe
              C:\Windows\system32\msiexec.exe /V
              1⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:4572

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Local\06c89a3f794608476df477732a4003e3\Admin@NGBMWCIY_en-US\Browsers\Firefox\Bookmarks.txt

              Filesize

              105B

              MD5

              2e9d094dda5cdc3ce6519f75943a4ff4

              SHA1

              5d989b4ac8b699781681fe75ed9ef98191a5096c

              SHA256

              c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

              SHA512

              d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

            • C:\Users\Admin\AppData\Local\06c89a3f794608476df477732a4003e3\Admin@NGBMWCIY_en-US\Directories\OneDrive.txt

              Filesize

              25B

              MD5

              966247eb3ee749e21597d73c4176bd52

              SHA1

              1e9e63c2872cef8f015d4b888eb9f81b00a35c79

              SHA256

              8ddfc481b1b6ae30815ecce8a73755862f24b3bb7fdebdbf099e037d53eb082e

              SHA512

              bd30aec68c070e86e3dec787ed26dd3d6b7d33d83e43cb2d50f9e2cff779fee4c96afbbe170443bd62874073a844beb29a69b10c72c54d7d444a8d86cfd7b5aa

            • C:\Users\Admin\AppData\Local\06c89a3f794608476df477732a4003e3\Admin@NGBMWCIY_en-US\Directories\Startup.txt

              Filesize

              24B

              MD5

              68c93da4981d591704cea7b71cebfb97

              SHA1

              fd0f8d97463cd33892cc828b4ad04e03fc014fa6

              SHA256

              889ed51f9c16a4b989bda57957d3e132b1a9c117ee84e208207f2fa208a59483

              SHA512

              63455c726b55f2d4de87147a75ff04f2daa35278183969ccf185d23707840dd84363bec20d4e8c56252196ce555001ca0e61b3f4887d27577081fdef9e946402

            • C:\Users\Admin\AppData\Local\06c89a3f794608476df477732a4003e3\Admin@NGBMWCIY_en-US\Directories\Videos.txt

              Filesize

              23B

              MD5

              1fddbf1169b6c75898b86e7e24bc7c1f

              SHA1

              d2091060cb5191ff70eb99c0088c182e80c20f8c

              SHA256

              a67aa329b7d878de61671e18cd2f4b011d11cbac67ea779818c6dafad2d70733

              SHA512

              20bfeafde7fec1753fef59de467bd4a3dd7fe627e8c44e95fe62b065a5768c4508e886ec5d898e911a28cf6365f455c9ab1ebe2386d17a76f53037f99061fd4d

            • C:\Users\Admin\AppData\Local\06c89a3f794608476df477732a4003e3\Admin@NGBMWCIY_en-US\System\Apps.txt

              Filesize

              4KB

              MD5

              26d9f9a2a9446c14bf64d28289945b28

              SHA1

              34a66ba4a07194c8bba99964df1dc0e61996afb4

              SHA256

              b2b9a40214040e248a11e4b5d9cd8f45d759434a57acdd0a70f70fef95fa7124

              SHA512

              4e38a4a7f5598ecd4aa233749005936c16cb5fc0e0465c4be12bea37e961825c44b07aa2811e321f4dc56bef6a2d7900aab904300d9ed5cf6f6427c8784bafdd

            • C:\Users\Admin\AppData\Local\06c89a3f794608476df477732a4003e3\Admin@NGBMWCIY_en-US\System\Debug.txt

              Filesize

              1KB

              MD5

              f61cdbf5eae36e8855b7bb0019d8fd30

              SHA1

              abb53598697976bad9885304ae492e6b590986e6

              SHA256

              a94bb049b645b0c98e223daf32f311f5d9f208d43c186c114b950d8039d26ff9

              SHA512

              9bc45937863ec02a0471b80c5c658c461319fb6663b2f172f90c808f508ea0446d289b4b8aafedec016e15b0b2518d2bbda3a947f90f680c3f0d50b099da28b5

            • C:\Users\Admin\AppData\Local\06c89a3f794608476df477732a4003e3\Admin@NGBMWCIY_en-US\System\Process.txt

              Filesize

              4KB

              MD5

              a8fa5829023eb5c26df7d4c9b2690037

              SHA1

              7319652628f37ba6373bd44d346b5ebb8fc01aca

              SHA256

              d2628bde1df15a73f40a631d13497e80bc8bfcc9ad8b8afd5044a3abc4ac277d

              SHA512

              55a0dd383783c1900c6bfd4379fea36b39a24293a27ce7c47359a6922bb4b0f4eb9ce9bb6f580f03002fc94cf4f601c77f52d7ffbaddbbfa719c7f797ef04c30

            • C:\Users\Admin\AppData\Local\06c89a3f794608476df477732a4003e3\Admin@NGBMWCIY_en-US\System\ProductKey.txt

              Filesize

              29B

              MD5

              71eb5479298c7afc6d126fa04d2a9bde

              SHA1

              a9b3d5505cf9f84bb6c2be2acece53cb40075113

              SHA256

              f6cadfd4e4c25ff3b8cffe54a2af24a757a349abbf4e1142ec4c9789347fe8b3

              SHA512

              7c6687e21d31ec1d6d2eff04b07b465f875fd80df26677f1506b14158444cf55044eb6674880bd5bd44f04ff73023b26cb19b8837427a1d6655c96df52f140bd

            • C:\Users\Admin\AppData\Local\06c89a3f794608476df477732a4003e3\msgid.dat

              Filesize

              19B

              MD5

              71ec63d9b393c9809018fd5e77f6f5d5

              SHA1

              931fffac24d5faaacc5b62517761d5c23c975811

              SHA256

              9280ed6f38680fec5a7126e5990c2610e8b266c3259deabf657da9ddc146f853

              SHA512

              a49fb015d3b7e923de18528aea746d25a081ce6055837d1cebf978cd6ae695cba4eb64f1ed1d3241283fd9a3c8630f3858cfdf30d9437d940632a750a0ff3053

            • memory/596-7-0x00000000054A0000-0x0000000005532000-memory.dmp

              Filesize

              584KB

            • memory/596-12-0x0000000006450000-0x000000000646E000-memory.dmp

              Filesize

              120KB

            • memory/596-53-0x00000000069E0000-0x0000000006A72000-memory.dmp

              Filesize

              584KB

            • memory/596-60-0x00000000073A0000-0x000000000789E000-memory.dmp

              Filesize

              5.0MB

            • memory/596-8-0x0000000005530000-0x0000000005556000-memory.dmp

              Filesize

              152KB

            • memory/596-1-0x0000000073570000-0x0000000073C5E000-memory.dmp

              Filesize

              6.9MB

            • memory/596-161-0x0000000004FD0000-0x0000000004FE0000-memory.dmp

              Filesize

              64KB

            • memory/596-163-0x0000000006490000-0x000000000650A000-memory.dmp

              Filesize

              488KB

            • memory/596-10-0x0000000006420000-0x000000000642A000-memory.dmp

              Filesize

              40KB

            • memory/596-3-0x0000000004FD0000-0x0000000004FE0000-memory.dmp

              Filesize

              64KB

            • memory/596-0-0x0000000000450000-0x00000000005E2000-memory.dmp

              Filesize

              1.6MB

            • memory/596-9-0x0000000005560000-0x0000000005568000-memory.dmp

              Filesize

              32KB

            • memory/596-2-0x0000000004F10000-0x0000000004F76000-memory.dmp

              Filesize

              408KB

            • memory/596-232-0x0000000006890000-0x0000000006942000-memory.dmp

              Filesize

              712KB

            • memory/596-234-0x00000000028B0000-0x00000000028D2000-memory.dmp

              Filesize

              136KB

            • memory/596-235-0x0000000008BA0000-0x0000000008EF0000-memory.dmp

              Filesize

              3.3MB

            • memory/596-237-0x0000000073570000-0x0000000073C5E000-memory.dmp

              Filesize

              6.9MB

            • memory/596-11-0x0000000006430000-0x0000000006438000-memory.dmp

              Filesize

              32KB

            • memory/596-248-0x0000000006FC0000-0x0000000006FCA000-memory.dmp

              Filesize

              40KB

            • memory/596-249-0x0000000004FD0000-0x0000000004FE0000-memory.dmp

              Filesize

              64KB

            • memory/596-250-0x0000000004FD0000-0x0000000004FE0000-memory.dmp

              Filesize

              64KB