Analysis

  • max time kernel
    149s
  • max time network
    142s
  • 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 22:40

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:3148
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5032
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
          PID:3144
        • C:\Windows\SysWOW64\findstr.exe
          findstr All
          3⤵
            PID:3132
          • C:\Windows\SysWOW64\netsh.exe
            netsh wlan show profile
            3⤵
              PID:5088
          • C:\Windows\SysWOW64\cmd.exe
            "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:2680
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              3⤵
                PID:1732
              • C:\Windows\SysWOW64\netsh.exe
                netsh wlan show networks mode=bssid
                3⤵
                  PID:4508
            • C:\Windows\system32\msiexec.exe
              C:\Windows\system32\msiexec.exe /V
              1⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:3576

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            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

              35d21a27e2f381f14fc55cf32a27233c

              SHA1

              1643fe84a23dc8b3321c121dc57820607e97aa82

              SHA256

              420f90eae4d9cdc784828e06122a005c31b4cd58be9e514da7f24a68ad0b9c74

              SHA512

              464ef7b05e00f25942de3bfe092fc90be6f96193de200089d92c4c30abf4d0aef086e82d40d9187244e02977ff6d0147f916f7d2ca258ff4faca2dc1f299357d

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

              Filesize

              4KB

              MD5

              6ad09a68061fe6c006b925669cf4b139

              SHA1

              2c5adb0fb5918b688b8fb4f21d384e4bb45f81a7

              SHA256

              af7de6b871d95011680db18e0c3a40afb8ccacde5a0ffb301bde7d116b99b4b5

              SHA512

              c6ee7fee697b19b675fce2d41dd612cd513e2511fbf7f1b2f552b57b462fbbc41896cad01eee2ccd966cd86d47765607281d39a3b8499b9c7da4d8c2dedb2310

            • 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

              d3c95d5eedf09ce409c4b5da5c18a9c8

              SHA1

              81280bc07fefbf482970701d7f6c9a4786b0e5b2

              SHA256

              0ab1d4a3151465dfd385fb065ade21fdf7539c73286e367b39d83905877ce763

              SHA512

              92e4a952ac9f114e32ef41906e83f5d59b52b93d399e0aefe2a6e548bcd2703d31ee2c13db9fd68d5a0462629b9a6dd8d78680fce73fae08bdbd484b258a8215

            • memory/3148-10-0x0000000006600000-0x000000000660A000-memory.dmp

              Filesize

              40KB

            • memory/3148-3-0x0000000005150000-0x0000000005160000-memory.dmp

              Filesize

              64KB

            • memory/3148-53-0x0000000006EE0000-0x0000000006F72000-memory.dmp

              Filesize

              584KB

            • memory/3148-59-0x0000000007580000-0x0000000007A7E000-memory.dmp

              Filesize

              5.0MB

            • memory/3148-11-0x0000000006610000-0x0000000006618000-memory.dmp

              Filesize

              32KB

            • memory/3148-138-0x0000000005150000-0x0000000005160000-memory.dmp

              Filesize

              64KB

            • memory/3148-0-0x0000000000630000-0x00000000007C2000-memory.dmp

              Filesize

              1.6MB

            • memory/3148-164-0x0000000006850000-0x00000000068CA000-memory.dmp

              Filesize

              488KB

            • memory/3148-9-0x0000000005740000-0x0000000005748000-memory.dmp

              Filesize

              32KB

            • memory/3148-8-0x0000000005710000-0x0000000005736000-memory.dmp

              Filesize

              152KB

            • memory/3148-7-0x0000000005680000-0x0000000005712000-memory.dmp

              Filesize

              584KB

            • memory/3148-12-0x0000000006630000-0x000000000664E000-memory.dmp

              Filesize

              120KB

            • memory/3148-2-0x0000000004FE0000-0x0000000005046000-memory.dmp

              Filesize

              408KB

            • memory/3148-233-0x0000000007080000-0x0000000007132000-memory.dmp

              Filesize

              712KB

            • memory/3148-235-0x0000000004AF0000-0x0000000004B12000-memory.dmp

              Filesize

              136KB

            • memory/3148-236-0x0000000008C80000-0x0000000008FD0000-memory.dmp

              Filesize

              3.3MB

            • memory/3148-248-0x0000000006A40000-0x0000000006A4A000-memory.dmp

              Filesize

              40KB

            • memory/3148-1-0x00000000737B0000-0x0000000073E9E000-memory.dmp

              Filesize

              6.9MB

            • memory/3148-249-0x00000000737B0000-0x0000000073E9E000-memory.dmp

              Filesize

              6.9MB

            • memory/3148-250-0x0000000005150000-0x0000000005160000-memory.dmp

              Filesize

              64KB

            • memory/3148-251-0x0000000005150000-0x0000000005160000-memory.dmp

              Filesize

              64KB