Analysis

  • max time kernel
    150s
  • max time network
    140s
  • platform
    windows10-1703_x64
  • resource
    win10-20230915-en
  • resource tags

    arch:x64arch:x86image:win10-20230915-enlocale:en-usos:windows10-1703-x64system
  • submitted
    25/09/2023, 01:31

General

  • Target
    957ff09bcf9200c5f94f7114fe4b89297ea4d51e58036ef85e9b4366321cf9ca.exe
  • Size 270KB
  • Sample230925-bxdfwsce32
  • SHA256 957ff09bcf9200c5f94f7114fe4b89297ea4d51e58036ef85e9b4366321cf9ca
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • smokeloader

Version
  • 2022

C2
  • http://77.91.68.29/fks/

rc4.i32
rc4.i32

Signatures

  • Detected google phishing page
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 7 IoCs
  • Program crash 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 56 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\957ff09bcf9200c5f94f7114fe4b89297ea4d51e58036ef85e9b4366321cf9ca.exe
    "C:\Users\Admin\AppData\Local\Temp\957ff09bcf9200c5f94f7114fe4b89297ea4d51e58036ef85e9b4366321cf9ca.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4636
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:4592
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4636 -s 212
      2⤵
      • Program crash
      PID:4548
  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\9601.bat" "
    1⤵
    • Checks computer location settings
    PID:2696
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe" -ServerName:MicrosoftEdge.AppXdnhjhccw3zf0j06tkg3jtqr00qdm0khc.mca
    1⤵
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:1160
  • C:\Windows\system32\browser_broker.exe
    C:\Windows\system32\browser_broker.exe -Embedding
    1⤵
    • Modifies Internet Explorer settings
    PID:4508
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Modifies registry class
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4472
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:3416
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Drops file in Windows directory
    • Modifies registry class
    PID:1760
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Drops file in Windows directory
    • Modifies registry class
    PID:3160
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Drops file in Windows directory
    • Modifies registry class
    PID:2724
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    PID:5056
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Drops file in Windows directory
    • Modifies registry class
    PID:1672
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Modifies registry class
    PID:3500

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        edgecompatviewlist[1].xml

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\PZQ0K35H\edgecompatviewlist[1].xml
        • Size 74KB
        • SHA256 853d2f4eb81c9fdcea2ee079f6faf98214b111b77cdf68709b38989d123890f1
        • MD5 SHA1 SHA512 SSDEEP

        suggestions[1].en-US

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\Cache\KGUHK7KB\suggestions[1].en-US
        • Size 17KB
        • SHA256 c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
        • MD5 SHA1 SHA512 SSDEEP

        B8BxsscfVBr[1].ico

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\Cache\SBGQ2HWM\B8BxsscfVBr[1].ico
        • Size 1KB
        • SHA256 e6d1d77403cd9f14fd2377d07e84350cfe768e3353e402bf42ebdc8593a58c9a
        • MD5 SHA1 SHA512

        23V8JLHU.cookie

        • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\MicrosoftEdge\Cookies\23V8JLHU.cookie
        • Size 130B
        • SHA256 e14cd1450b5b17ba36d398a1def803a551aedc1e59f5c19a9358170e7586b206
        • MD5 SHA1 SHA512

        HCF5L3EK.cookie

        • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\MicrosoftEdge\Cookies\HCF5L3EK.cookie
        • Size 130B
        • SHA256 bbbab104f5f77c3d259d73bc6a35f0e679c0fd14b1cba5b587daba3493f29e32
        • MD5 SHA1 SHA512

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 1KB
        • SHA256 6e5c17b2b4e22fa800baa0eaf0b76ce73005e463b915503e8bca92223b9cf594
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_A7725538C46DE2D0088EE44974E2CEBA

        • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_A7725538C46DE2D0088EE44974E2CEBA
        • Size 724B
        • SHA256 0b720e19270c672f9b6e0ec40b468ac49376807de08a814573fe038779534f45
        • MD5 SHA1 SHA512

        F2DDCD2B5F37625B82E81F4976CEE400_87DCDABBB68171FA19C9A78DBA85E190

        • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\Content\F2DDCD2B5F37625B82E81F4976CEE400_87DCDABBB68171FA19C9A78DBA85E190
        • Size 471B
        • SHA256 f7ffcd2b2deb0aafb5ab3eca136e1bfa6560686bf31f6982afeb0535dfd70bd7
        • MD5 SHA1 SHA512

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 410B
        • SHA256 c139e9ab11258f3e0dc769f6a929c086201da5f3e1802e90335b6dd79d80aa9d
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_A7725538C46DE2D0088EE44974E2CEBA

        • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_A7725538C46DE2D0088EE44974E2CEBA
        • Size 392B
        • SHA256 7f5f05f129f4856379b7d02ae8194c2f64263e61e76c4702a734ddb0ba67b14b
        • MD5 SHA1 SHA512

        F2DDCD2B5F37625B82E81F4976CEE400_87DCDABBB68171FA19C9A78DBA85E190

        • Path C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\CryptnetUrlCache\MetaData\F2DDCD2B5F37625B82E81F4976CEE400_87DCDABBB68171FA19C9A78DBA85E190
        • Size 406B
        • SHA256 c317771ebefcee172bd3b21ddb899d8130bcce29b2f0861d9ff56f007f367adb
        • MD5 SHA1 SHA512

        9601.bat

        • Path C:\Users\Admin\AppData\Local\Temp\9601.bat
        • Size 79B
        • SHA256 ef6e942aefe925fefac19fa816986ea25de6935c4f377c717e29b94e65f9019f
        • MD5 SHA1 SHA512

        memory/1160-382-0x00000294B6EF0000-0x00000294B6EF1000-memory.dmp

        memory/1160-51-0x00000294B0AB0000-0x00000294B0AB2000-memory.dmp

        memory/1160-477-0x00000294B7000000-0x00000294B7091000-memory.dmp

        memory/1160-16-0x00000294B0720000-0x00000294B0730000-memory.dmp

        memory/1160-32-0x00000294B0920000-0x00000294B0930000-memory.dmp

        memory/1160-383-0x00000294B70A0000-0x00000294B70A1000-memory.dmp

        memory/1672-494-0x0000020DEB630000-0x0000020DEB632000-memory.dmp

        memory/1672-492-0x0000020DEB610000-0x0000020DEB612000-memory.dmp

        memory/1672-490-0x0000020DEB550000-0x0000020DEB552000-memory.dmp

        memory/1672-488-0x0000020DEB530000-0x0000020DEB532000-memory.dmp

        memory/1760-369-0x000001705D990000-0x000001705D992000-memory.dmp

        memory/1760-337-0x000001705C9F0000-0x000001705C9F2000-memory.dmp

        memory/1760-410-0x000001705CD00000-0x000001705CE00000-memory.dmp

        memory/1760-349-0x000001705C9D0000-0x000001705C9D2000-memory.dmp

        memory/1760-332-0x000001705CD00000-0x000001705CE00000-memory.dmp

        memory/1760-327-0x000001705B570000-0x000001705B572000-memory.dmp

        memory/1760-208-0x000001705B7C0000-0x000001705B7E0000-memory.dmp

        memory/1760-192-0x000001705A600000-0x000001705A700000-memory.dmp

        memory/1760-335-0x000001705C9C0000-0x000001705C9C2000-memory.dmp

        memory/1760-390-0x000001705AFE0000-0x000001705B000000-memory.dmp

        memory/1760-496-0x0000017049C00000-0x0000017049C91000-memory.dmp

        memory/1760-355-0x000001705D1F0000-0x000001705D1F2000-memory.dmp

        memory/1760-359-0x000001705D950000-0x000001705D952000-memory.dmp

        memory/1760-366-0x000001705D980000-0x000001705D982000-memory.dmp

        memory/1760-362-0x000001705D970000-0x000001705D972000-memory.dmp

        memory/2724-468-0x000002323AEE0000-0x000002323AF00000-memory.dmp

        memory/3160-412-0x00000172ECF00000-0x00000172ECF91000-memory.dmp

        memory/3304-4-0x0000000001380000-0x0000000001396000-memory.dmp

        memory/4592-0-0x0000000000400000-0x0000000000409000-memory.dmp

        memory/4592-5-0x0000000000400000-0x0000000000409000-memory.dmp

        memory/4592-3-0x0000000000400000-0x0000000000409000-memory.dmp