Analysis

  • max time kernel
    148s
  • max time network
    129s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    26-05-2024 16:41

General

  • Target

    5a7f0ae453a4302dc288e00b6392923906ead1f181d338ab1c02a4a78f78593b.exe

  • Size

    1.6MB

  • MD5

    5c51643f4c3ca737d3162d82840761c7

  • SHA1

    dede91d3e74af7b5f67a65c0fffc2fc8ca349b32

  • SHA256

    5a7f0ae453a4302dc288e00b6392923906ead1f181d338ab1c02a4a78f78593b

  • SHA512

    8215fb4221a725918e6eb89cb7e755c185eff496e4b0d3116898411ac73841fffaed4ebfb1d1de512b61e676950b5ceec115f1533622a40ed1a51abf2ecb6468

  • SSDEEP

    49152:ULTq24GjdGSiqkqXfd+/9AqYanieKdQc:UiEjdGSiqkqXf0FLYW

Malware Config

Extracted

Family

stealerium

C2

https://discord.com/api/webhooks/1244281935228965048/sJAD8BhTylLJViwx58UHGY7unbr6jQqQZSC4HrgK1L_fWJYHE1waujg1JuSnxcq9zxf6

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.

  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5a7f0ae453a4302dc288e00b6392923906ead1f181d338ab1c02a4a78f78593b.exe
    "C:\Users\Admin\AppData\Local\Temp\5a7f0ae453a4302dc288e00b6392923906ead1f181d338ab1c02a4a78f78593b.exe"
    1⤵
    • Accesses Microsoft Outlook profiles
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    • outlook_office_path
    • outlook_win_path
    PID:1960
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2504
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
          PID:2796
        • C:\Windows\SysWOW64\netsh.exe
          netsh wlan show profile
          3⤵
            PID:1904
          • C:\Windows\SysWOW64\findstr.exe
            findstr All
            3⤵
              PID:1312
          • C:\Windows\SysWOW64\cmd.exe
            "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:640
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              3⤵
                PID:2172
              • C:\Windows\SysWOW64\netsh.exe
                netsh wlan show networks mode=bssid
                3⤵
                  PID:1596
            • C:\Windows\system32\msiexec.exe
              C:\Windows\system32\msiexec.exe /V
              1⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:1536

            Network

            MITRE ATT&CK Matrix ATT&CK v13

            Defense Evasion

            Subvert Trust Controls

            1
            T1553

            Install Root Certificate

            1
            T1553.004

            Modify Registry

            1
            T1112

            Credential Access

            Unsecured Credentials

            1
            T1552

            Credentials In Files

            1
            T1552.001

            Discovery

            Query Registry

            1
            T1012

            System Information Discovery

            1
            T1082

            Collection

            Data from Local System

            1
            T1005

            Email Collection

            1
            T1114

            Command and Control

            Web Service

            1
            T1102

            Replay Monitor

            Loading Replay Monitor...

            Downloads

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

              68KB

              MD5

              29f65ba8e88c063813cc50a4ea544e93

              SHA1

              05a7040d5c127e68c25d81cc51271ffb8bef3568

              SHA256

              1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

              SHA512

              e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

            • C:\Users\Admin\AppData\Local\7e5ed9613cbbbdbc7234c47119ed5e2d\Admin@IZKCKOTP_en-US\Browsers\Firefox\Bookmarks.txt
              Filesize

              105B

              MD5

              2e9d094dda5cdc3ce6519f75943a4ff4

              SHA1

              5d989b4ac8b699781681fe75ed9ef98191a5096c

              SHA256

              c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

              SHA512

              d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

            • C:\Users\Admin\AppData\Local\7e5ed9613cbbbdbc7234c47119ed5e2d\Admin@IZKCKOTP_en-US\Directories\Startup.txt
              Filesize

              24B

              MD5

              68c93da4981d591704cea7b71cebfb97

              SHA1

              fd0f8d97463cd33892cc828b4ad04e03fc014fa6

              SHA256

              889ed51f9c16a4b989bda57957d3e132b1a9c117ee84e208207f2fa208a59483

              SHA512

              63455c726b55f2d4de87147a75ff04f2daa35278183969ccf185d23707840dd84363bec20d4e8c56252196ce555001ca0e61b3f4887d27577081fdef9e946402

            • C:\Users\Admin\AppData\Local\7e5ed9613cbbbdbc7234c47119ed5e2d\Admin@IZKCKOTP_en-US\Directories\Videos.txt
              Filesize

              23B

              MD5

              1fddbf1169b6c75898b86e7e24bc7c1f

              SHA1

              d2091060cb5191ff70eb99c0088c182e80c20f8c

              SHA256

              a67aa329b7d878de61671e18cd2f4b011d11cbac67ea779818c6dafad2d70733

              SHA512

              20bfeafde7fec1753fef59de467bd4a3dd7fe627e8c44e95fe62b065a5768c4508e886ec5d898e911a28cf6365f455c9ab1ebe2386d17a76f53037f99061fd4d

            • C:\Users\Admin\AppData\Local\7e5ed9613cbbbdbc7234c47119ed5e2d\Admin@IZKCKOTP_en-US\System\Apps.txt
              Filesize

              6KB

              MD5

              644d9f9d111d72a0928a4f0025b37667

              SHA1

              a191836e6a1c34c1616338003007476a1cb47470

              SHA256

              7a89ae9dd2a5ee5425d8c716817f873a2dc53e5bc27b4368d9ee0365c8fbf631

              SHA512

              71cc76287ea0fac89fe739951ef2349e7e9769a77044b4f95e00ec1e108707c9acd73a8b651dcbafdb8451db2e825b58f13b0e8674b33d9eb1d727e3b356be89

            • C:\Users\Admin\AppData\Local\7e5ed9613cbbbdbc7234c47119ed5e2d\Admin@IZKCKOTP_en-US\System\Debug.txt
              Filesize

              320B

              MD5

              66762157ab5571f35e5899b26528f7c0

              SHA1

              f2821109fb1ce9af06a2a7fc2013f88ce08152b0

              SHA256

              60a44865028bb19b65837d4c470126e2ea8d07f5ece8d7260de19990df543af6

              SHA512

              e616ea0e2aacb87b92b4778eac85e08966e8e54afe7541a2c350109a50937d19a44eacf789b3e7756821df8a395bea16f4140fb9d853c7c14a89a47e3e6832f0

            • C:\Users\Admin\AppData\Local\7e5ed9613cbbbdbc7234c47119ed5e2d\Admin@IZKCKOTP_en-US\System\ProductKey.txt
              Filesize

              29B

              MD5

              cad6c6bee6c11c88f5e2f69f0be6deb7

              SHA1

              289d74c3bebe6cca4e1d2e084482ad6d21316c84

              SHA256

              dc288491fadc4a85e71085890e3d6a7746e99a317cd5ef09a30272dfb10398c0

              SHA512

              e02cf6bff8b4ebd7a1346ecb1667be36c3ef7415fff77c3b9cfb370f3d0dc861f74d3e0e49065699850ba6cc025cd68d14ceb73f3b512c2a9b28873a69aff097

            • C:\Users\Admin\AppData\Local\7e5ed9613cbbbdbc7234c47119ed5e2d\msgid.dat
              Filesize

              19B

              MD5

              4c74545403f13ee4f19fed0ee7dc83bd

              SHA1

              943e76157018777292c1ebf9365259244e0b9139

              SHA256

              d68c5d95cbb5b8b537aed657d6ec09454cd10fb2a33afb99d22bddd11113f558

              SHA512

              23d7b07395f51616fc12397c16fcb67f3d72a70f126a293e34d5cdd871829cb3a372ed611c042ab9c8b86fb69e6e06dd978f7ee1a5963cfffaba1e25bb469dfc

            • C:\Users\Admin\AppData\Local\Temp\Tar4486.tmp
              Filesize

              177KB

              MD5

              435a9ac180383f9fa094131b173a2f7b

              SHA1

              76944ea657a9db94f9a4bef38f88c46ed4166983

              SHA256

              67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

              SHA512

              1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

            • memory/1960-8-0x0000000000770000-0x0000000000778000-memory.dmp
              Filesize

              32KB

            • memory/1960-48-0x0000000000CF0000-0x0000000000D0E000-memory.dmp
              Filesize

              120KB

            • memory/1960-47-0x0000000000BA0000-0x0000000000BA8000-memory.dmp
              Filesize

              32KB

            • memory/1960-46-0x0000000000B90000-0x0000000000B9A000-memory.dmp
              Filesize

              40KB

            • memory/1960-166-0x0000000005EE0000-0x0000000005F5A000-memory.dmp
              Filesize

              488KB

            • memory/1960-0-0x0000000074BAE000-0x0000000074BAF000-memory.dmp
              Filesize

              4KB

            • memory/1960-7-0x0000000000960000-0x0000000000986000-memory.dmp
              Filesize

              152KB

            • memory/1960-6-0x0000000004AD0000-0x0000000004B62000-memory.dmp
              Filesize

              584KB

            • memory/1960-2-0x0000000074BA0000-0x000000007528E000-memory.dmp
              Filesize

              6.9MB

            • memory/1960-230-0x0000000006E10000-0x0000000006EC2000-memory.dmp
              Filesize

              712KB

            • memory/1960-233-0x0000000074BAE000-0x0000000074BAF000-memory.dmp
              Filesize

              4KB

            • memory/1960-1-0x0000000001260000-0x00000000013F2000-memory.dmp
              Filesize

              1.6MB

            • memory/1960-245-0x0000000074BA0000-0x000000007528E000-memory.dmp
              Filesize

              6.9MB