Analysis

  • max time kernel
    27s
  • max time network
    27s
  • 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 02:22

General

  • Target

    build.exe

  • Size

    3.6MB

  • MD5

    8b561e03d153ec263381d6aa1bd1f109

  • SHA1

    593bf8a787cf5b186d1bb117515d137f154e1503

  • SHA256

    0d11e0d8d1204d1e8a953d13cd3e88e4715e8c06d8c695d32eb41a80207ce707

  • SHA512

    50c98ead4e1635c5b27b4f094a7feb0b315bca054251e3e70541e87c48c3e1b93adb24ba21f05b2fa3a90fd6b8e38591e223980140737841f4604c66b14845c1

  • SSDEEP

    98304:WEjdGSi3kqXf0FLYWCLbi6sfLxkuahjCOeX9YG9see5GnRyCAm0makxH13:43kSILYWqZAkuujCPX9YG9he5GnQCAJS

Malware Config

Extracted

Family

stealerium

C2

7960275769:AAFsNj7Q9GrsBKzVEmN2fGOLvIQWelRdwOA

Signatures

  • Stealerium

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 3 TTPs

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

  • Accesses Microsoft Outlook profiles 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.

  • 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 12 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 SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 34 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of FindShellTrayWindow 33 IoCs
  • Suspicious use of SendNotifyMessage 33 IoCs
  • Suspicious use of WriteProcessMemory 33 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⤵
    • Checks computer location settings
    • Accesses Microsoft Outlook profiles
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • outlook_office_path
    • outlook_win_path
    PID:1408
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
      2⤵
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Wi-Fi Discovery
      • Suspicious use of WriteProcessMemory
      PID:1468
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
        • System Location Discovery: System Language Discovery
        PID:4280
      • C:\Windows\SysWOW64\netsh.exe
        netsh wlan show profile
        3⤵
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Wi-Fi Discovery
        PID:2252
      • C:\Windows\SysWOW64\findstr.exe
        findstr All
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2244
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3756
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
        • System Location Discovery: System Language Discovery
        PID:3320
      • C:\Windows\SysWOW64\netsh.exe
        netsh wlan show networks mode=bssid
        3⤵
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:4212
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\821f0ed0-cc5e-422b-a4f2-68acf281dcff.bat"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3180
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
        • System Location Discovery: System Language Discovery
        PID:1288
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /PID 1408
        3⤵
        • System Location Discovery: System Language Discovery
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3240
      • C:\Windows\SysWOW64\timeout.exe
        timeout /T 2 /NOBREAK
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:4260
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1444
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:4420

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\1f7494d3696a1afeac06a8ddab9ed526\Admin@DSEYXUOD_en-US\Browsers\Firefox\Bookmarks.txt

    Filesize

    105B

    MD5

    2e9d094dda5cdc3ce6519f75943a4ff4

    SHA1

    5d989b4ac8b699781681fe75ed9ef98191a5096c

    SHA256

    c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

    SHA512

    d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

  • C:\Users\Admin\AppData\Local\1f7494d3696a1afeac06a8ddab9ed526\Admin@DSEYXUOD_en-US\Directories\OneDrive.txt

    Filesize

    25B

    MD5

    966247eb3ee749e21597d73c4176bd52

    SHA1

    1e9e63c2872cef8f015d4b888eb9f81b00a35c79

    SHA256

    8ddfc481b1b6ae30815ecce8a73755862f24b3bb7fdebdbf099e037d53eb082e

    SHA512

    bd30aec68c070e86e3dec787ed26dd3d6b7d33d83e43cb2d50f9e2cff779fee4c96afbbe170443bd62874073a844beb29a69b10c72c54d7d444a8d86cfd7b5aa

  • C:\Users\Admin\AppData\Local\1f7494d3696a1afeac06a8ddab9ed526\Admin@DSEYXUOD_en-US\Directories\Startup.txt

    Filesize

    24B

    MD5

    68c93da4981d591704cea7b71cebfb97

    SHA1

    fd0f8d97463cd33892cc828b4ad04e03fc014fa6

    SHA256

    889ed51f9c16a4b989bda57957d3e132b1a9c117ee84e208207f2fa208a59483

    SHA512

    63455c726b55f2d4de87147a75ff04f2daa35278183969ccf185d23707840dd84363bec20d4e8c56252196ce555001ca0e61b3f4887d27577081fdef9e946402

  • C:\Users\Admin\AppData\Local\1f7494d3696a1afeac06a8ddab9ed526\Admin@DSEYXUOD_en-US\Directories\Videos.txt

    Filesize

    23B

    MD5

    1fddbf1169b6c75898b86e7e24bc7c1f

    SHA1

    d2091060cb5191ff70eb99c0088c182e80c20f8c

    SHA256

    a67aa329b7d878de61671e18cd2f4b011d11cbac67ea779818c6dafad2d70733

    SHA512

    20bfeafde7fec1753fef59de467bd4a3dd7fe627e8c44e95fe62b065a5768c4508e886ec5d898e911a28cf6365f455c9ab1ebe2386d17a76f53037f99061fd4d

  • C:\Users\Admin\AppData\Local\1f7494d3696a1afeac06a8ddab9ed526\Admin@DSEYXUOD_en-US\System\Apps.txt

    Filesize

    6KB

    MD5

    211bea1a19e2a4612fbeff18f1cc913c

    SHA1

    8ec73e9eca88e4a24ba6a584d1c542c252cf0595

    SHA256

    aa6022aae6e6f02592f5738015280a0750488adb645e9cbb645fec64ee537b09

    SHA512

    81ae103574c83c780e0464829d9a339dde245315fdcb0b30188bfac8a68f4e910bc1079b39acc4f725e65be476efb6509b8e8c39046ca5fbe88e222f08a27324

  • C:\Users\Admin\AppData\Local\1f7494d3696a1afeac06a8ddab9ed526\Admin@DSEYXUOD_en-US\System\Process.txt

    Filesize

    4KB

    MD5

    f83fc901e7d5658761c11dc89da41f0f

    SHA1

    20c12acaac92f7e92145e66ee5f78d49aef85ebf

    SHA256

    c355b6abe10ad359b8eb8d9ec4296d85f2321feb354b81d7723067a601bc0946

    SHA512

    8ff7ae45b26d6551abe2460dae14f5035809126f1c1443d8495651fc7e3eaae245cdc1d9afc23d8a9b8ffd0f9a850c45829870107810b01a2b12661905e612fe

  • C:\Users\Admin\AppData\Local\1f7494d3696a1afeac06a8ddab9ed526\Admin@DSEYXUOD_en-US\System\ProductKey.txt

    Filesize

    31B

    MD5

    390bf9273709c4e84ca66ff94c05c86f

    SHA1

    6416d2c5dc0c1769296ff019c398f7ce99e57151

    SHA256

    3f9b0d4d54ef65cb1244663ce2adf691dc7e98d2ed72c3b290bbe374c0c6b728

    SHA512

    11930bdc569136403189d17dac5c9468eac41d6eb76bfb558d36c10410f34d59bcdc2dbea449e7f2e1d38f2710974e123ee4a0c4a2fb5c19448acb99020b3b15

  • C:\Users\Admin\AppData\Local\1f7494d3696a1afeac06a8ddab9ed526\msgid.dat

    Filesize

    2B

    MD5

    ea5d2f1c4608232e07d3aa3d998e5135

    SHA1

    c66c65175fecc3103b3b587be9b5b230889c8628

    SHA256

    a68b412c4282555f15546cf6e1fc42893b7e07f271557ceb021821098dd66c1b

    SHA512

    e559aefac6fe1b006d3497abee2649ceb71fcceea73fd223782338ab29c08e5b887836b806349d5ace9030c69ca91850b01c468825d02359a5faee7261de415e

  • C:\Users\Admin\AppData\Local\Temp\821f0ed0-cc5e-422b-a4f2-68acf281dcff.bat

    Filesize

    152B

    MD5

    8c0b9d60e4d5b23f49dd394dd3441778

    SHA1

    55549c5dc8f26bc27696c0b802e0c549cf2d435e

    SHA256

    9300bf82bc5a2ba760d9621ed8e27becda65be243b6668596d199bae42bb67f7

    SHA512

    d5bfe04a4b5cac7603944b39c201e3cdd575d39bbf6b34b767a11b9ed675b52dafc1d043315f5f7e09e78cc0275a45540442ca0fd022c4ed67b3c42623e5bbd1

  • C:\Users\Admin\AppData\Local\Temp\Stealerium-Latest.log

    Filesize

    9KB

    MD5

    6e8e59e8717e6742de47acb62e63cc94

    SHA1

    87b9ad8d543ee091e68dd6ecc3b21d23029307fb

    SHA256

    9566806737cdc2077ec430aa6b7f9544c06751baff5c2f7af923b39da8f735d1

    SHA512

    147935ad6f55c4af4c4bc0c3c9f26fce3778c4841f0f09f337b0c1fe7945853bc289ba3f2c31fbd568db3d6fd788aacbe39ff8c24334a36c9bb9ace92108b5bf

  • memory/1408-125-0x0000000007150000-0x00000000071E2000-memory.dmp

    Filesize

    584KB

  • memory/1408-330-0x0000000006FB0000-0x0000000007062000-memory.dmp

    Filesize

    712KB

  • memory/1408-257-0x0000000006AF0000-0x0000000006B6A000-memory.dmp

    Filesize

    488KB

  • memory/1408-0-0x00000000749EE000-0x00000000749EF000-memory.dmp

    Filesize

    4KB

  • memory/1408-9-0x00000000749E0000-0x0000000075190000-memory.dmp

    Filesize

    7.7MB

  • memory/1408-8-0x00000000749EE000-0x00000000749EF000-memory.dmp

    Filesize

    4KB

  • memory/1408-3-0x00000000749E0000-0x0000000075190000-memory.dmp

    Filesize

    7.7MB

  • memory/1408-2-0x00000000056D0000-0x0000000005736000-memory.dmp

    Filesize

    408KB

  • memory/1408-332-0x0000000006CB0000-0x0000000006CD2000-memory.dmp

    Filesize

    136KB

  • memory/1408-333-0x0000000007F50000-0x00000000082A4000-memory.dmp

    Filesize

    3.3MB

  • memory/1408-335-0x0000000007530000-0x00000000075D0000-memory.dmp

    Filesize

    640KB

  • memory/1408-128-0x00000000077A0000-0x0000000007D44000-memory.dmp

    Filesize

    5.6MB

  • memory/1408-363-0x00000000749E0000-0x0000000075190000-memory.dmp

    Filesize

    7.7MB

  • memory/1408-1-0x0000000000920000-0x0000000000CCA000-memory.dmp

    Filesize

    3.7MB

  • memory/4420-336-0x000002743A5D0000-0x000002743A5D1000-memory.dmp

    Filesize

    4KB

  • memory/4420-342-0x000002743A5D0000-0x000002743A5D1000-memory.dmp

    Filesize

    4KB

  • memory/4420-344-0x000002743A5D0000-0x000002743A5D1000-memory.dmp

    Filesize

    4KB

  • memory/4420-346-0x000002743A5D0000-0x000002743A5D1000-memory.dmp

    Filesize

    4KB

  • memory/4420-345-0x000002743A5D0000-0x000002743A5D1000-memory.dmp

    Filesize

    4KB

  • memory/4420-347-0x000002743A5D0000-0x000002743A5D1000-memory.dmp

    Filesize

    4KB

  • memory/4420-348-0x000002743A5D0000-0x000002743A5D1000-memory.dmp

    Filesize

    4KB

  • memory/4420-343-0x000002743A5D0000-0x000002743A5D1000-memory.dmp

    Filesize

    4KB

  • memory/4420-338-0x000002743A5D0000-0x000002743A5D1000-memory.dmp

    Filesize

    4KB

  • memory/4420-337-0x000002743A5D0000-0x000002743A5D1000-memory.dmp

    Filesize

    4KB