Analysis

  • max time kernel
    89s
  • 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 02:26

General

  • Target

    RLTool.exe

  • Size

    135KB

  • MD5

    d8dd178edd900a25706432da4168433c

  • SHA1

    6f97a417179ddcec0a90eeee4dffd76aa2602537

  • SHA256

    1e2b6bfb5d47fef87162614b2c6e5cecd46ce78a1d5cf7ea1744bc49dde8db5f

  • SHA512

    6f4b1e2c6c35136899f552c127d992ba30d505ba20f0d5da73801d43d1b1c0a7eb4029a544f5f5eb46a350c7555d4e6c6be6c55db33c4c6a7363f827b68857d8

  • SSDEEP

    3072:DjK4UGDHXrQ8hy7qgpHulWD9ZvZ5Pf3Ca10xuZ04ntfO6hBut:DjK4TDUqgpqWDLZ5H+xuZ04FhA

Malware Config

Extracted

Family

stealerium

C2

7960275769:AAFsNj7Q9GrsBKzVEmN2fGOLvIQWelRdwOA

Signatures

  • Stealerium

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

  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Disables cmd.exe use via registry modification 1 IoCs
  • Downloads MZ/PE file
  • 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.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Drops desktop.ini file(s) 1 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.

  • Sets desktop wallpaper using registry 2 TTPs 1 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 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 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 28 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs
  • System policy modification 1 TTPs 4 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RLTool.exe
    "C:\Users\Admin\AppData\Local\Temp\RLTool.exe"
    1⤵
    • Disables RegEdit via registry modification
    • Disables cmd.exe use via registry modification
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4876
    • C:\Users\Admin\AppData\Roaming\build.bin
      "C:\Users\Admin\AppData\Roaming\build.bin"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • 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:2640
      • 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:3568
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4308
        • 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:4704
        • C:\Windows\SysWOW64\findstr.exe
          findstr All
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2132
      • 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:4284
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3516
        • 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:2812
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\1b168266-ba7b-4255-87ec-f58efbc427db.bat"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4620
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:964
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /PID 2640
          4⤵
          • System Location Discovery: System Language Discovery
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:4300
        • C:\Windows\SysWOW64\timeout.exe
          timeout /T 2 /NOBREAK
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:3076
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4260

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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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

    09676d0b3d1f26e68f403c7a214bbd01

    SHA1

    9858f5b320b31e894e364c0878c2465eeb2b8db7

    SHA256

    a39a03eece7be496914cef242598970177c5c1d585f1facee92e8593112fa80e

    SHA512

    fe390ec60acf7e5bda5b95eb615d43137ae6afda9e885bd43be39ee7fcf38e2570548fc929a8ca37eeb1e8caf2fb85c297405a8cce61bf8eb7571934748a3a89

  • 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

    14bfa6bb14875e45bba028a21ed38046

    SHA1

    a72b20062ec2c47ab2ceb97ac1bee818f8b6c6cb

    SHA256

    c75cb66ae28d8ebc6eded002c28a8ba0d06d3a78c6b5cbf9b2ade051f0775ac4

    SHA512

    12dfe9621346c4db705d8c909e28a4509fab47649b4bcf7e100e4f9d97a5c1dcf19e03be8c74fd30244a0a1764aad06fae673cdd04c408070efab1b4395dd61b

  • C:\Users\Admin\AppData\Local\Temp\1b168266-ba7b-4255-87ec-f58efbc427db.bat

    Filesize

    152B

    MD5

    38b7c5a3f50c596b1cd39d0f53bbb9b8

    SHA1

    bf6ec36dffbe3d1b807507ff132565a2616c236e

    SHA256

    8d79ff2562ee8bf3aaf4aaf3349c7937bd686c219155eb71084571f8b138998c

    SHA512

    13c20042dba096c6cc7f3b26c6378431ca47a1ec6e668ff194f8b50a37d772860100bd5eba1d48ec89aed0e2b9b0a142e634cf76bd25ee3f886ce84cfffb3aae

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

    Filesize

    10KB

    MD5

    299f0932c44f9b012e75fd32cdb417c6

    SHA1

    5c93b1ed26ef002d9e718e00d35cf128c3bb889a

    SHA256

    bf94c1ecfe5e2b8a0265cc707b9ed557ea7879fc2e9d73ec5c3ba8407373756c

    SHA512

    55daa417367de0b494159afcf31a75053559ab82798778d715e0bc5bb54b44d749a21136e70407a6d13bc70e8e8fc41b93f1176d852a7b08f209ddff1427410b

  • C:\Users\Admin\AppData\Roaming\build.bin

    Filesize

    3.6MB

    MD5

    8b561e03d153ec263381d6aa1bd1f109

    SHA1

    593bf8a787cf5b186d1bb117515d137f154e1503

    SHA256

    0d11e0d8d1204d1e8a953d13cd3e88e4715e8c06d8c695d32eb41a80207ce707

    SHA512

    50c98ead4e1635c5b27b4f094a7feb0b315bca054251e3e70541e87c48c3e1b93adb24ba21f05b2fa3a90fd6b8e38591e223980140737841f4604c66b14845c1

  • memory/2640-123-0x0000000007140000-0x00000000071D2000-memory.dmp

    Filesize

    584KB

  • memory/2640-341-0x0000000006DA0000-0x0000000006E52000-memory.dmp

    Filesize

    712KB

  • memory/2640-268-0x0000000006B20000-0x0000000006B9A000-memory.dmp

    Filesize

    488KB

  • memory/2640-149-0x000000007499E000-0x000000007499F000-memory.dmp

    Filesize

    4KB

  • memory/2640-130-0x0000000007790000-0x0000000007D34000-memory.dmp

    Filesize

    5.6MB

  • memory/2640-7-0x0000000074990000-0x0000000075140000-memory.dmp

    Filesize

    7.7MB

  • memory/2640-6-0x0000000005460000-0x00000000054C6000-memory.dmp

    Filesize

    408KB

  • memory/2640-197-0x0000000074990000-0x0000000075140000-memory.dmp

    Filesize

    7.7MB

  • memory/2640-343-0x0000000006CA0000-0x0000000006CC2000-memory.dmp

    Filesize

    136KB

  • memory/2640-344-0x0000000007F40000-0x0000000008294000-memory.dmp

    Filesize

    3.3MB

  • memory/2640-346-0x0000000007510000-0x00000000075B0000-memory.dmp

    Filesize

    640KB

  • memory/2640-5-0x0000000000710000-0x0000000000ABA000-memory.dmp

    Filesize

    3.7MB

  • memory/2640-4-0x000000007499E000-0x000000007499F000-memory.dmp

    Filesize

    4KB

  • memory/2640-361-0x0000000074990000-0x0000000075140000-memory.dmp

    Filesize

    7.7MB