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Overview

overview

9

Static

static

a13b250f7f...d9.exe

windows7-x64

9

a13b250f7f...d9.exe

windows10-2004-x64

9

Analysis

  • max time kernel
    127s
  • max time network
    134s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    27/11/2022, 23:53 UTC

Sharing

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General

  • Target

    a13b250f7f8b9750b56abd1987546b1d55ad9e1b8e7d1daf1d1f775b297d9fd9.exe

  • Size

    512KB

  • MD5

    e5576d185ff77967a528e69647e7544f

  • SHA1

    2173f0e73f10d37e2858372cfa4f5a74728ee03a

  • SHA256

    a13b250f7f8b9750b56abd1987546b1d55ad9e1b8e7d1daf1d1f775b297d9fd9

  • SHA512

    fa4c5df57ab17e96cdf03768f97c7fe60c5ee171fa09e0ab5fb6db46829e0b46bd7ba7c9ec3fea1db4b7b58167286057682c7c9b718110b251403147cc4addb8

  • SSDEEP

    12288:0+h9St2Ma70zIIc91Dwws4zruXic2O/3E4D:0+h9OY70z+warul3E4D

Score
9/10
evasion

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
    evasion
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
    evasionspywaretrojan
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a13b250f7f8b9750b56abd1987546b1d55ad9e1b8e7d1daf1d1f775b297d9fd9.exe
    "C:\Users\Admin\AppData\Local\Temp\a13b250f7f8b9750b56abd1987546b1d55ad9e1b8e7d1daf1d1f775b297d9fd9.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Loads dropped DLL
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1340
    • C:\Users\Admin\AppData\Local\Temp\n399\s399.exe
      "C:\Users\Admin\AppData\Local\Temp\n399\s399.exe" 76834fb9bd58bcfa2735ecc5B0272YK8NNbp7K4nlbJyfPUaIluVODZo52HrQeK2TNC+Nbo+xFwR6C6kIwBGnsobe6jkTAlC1C1RvUYCcwsnx++0YFL2vC6X7+LJ4e+8ckipAPQfS3JtH7RkBRQZ0NDvGiBAWo5i4whwr5j4gkV+EbIW /v "C:\Users\Admin\AppData\Local\Temp\a13b250f7f8b9750b56abd1987546b1d55ad9e1b8e7d1daf1d1f775b297d9fd9.exe"
      2⤵
      • Executes dropped EXE
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1036

Network

  • flag-unknown
    DNS
    ocsp.thawte.com
    s399.exe
    Remote address:
    8.8.8.8:53
    Request
    ocsp.thawte.com
    IN A
    Response
    ocsp.thawte.com
    IN CNAME
    ocsp-ds.ws.symantec.com.edgekey.net
    ocsp-ds.ws.symantec.com.edgekey.net
    IN CNAME
    e8218.dscb1.akamaiedge.net
    e8218.dscb1.akamaiedge.net
    IN A
    23.51.123.27
  • flag-unknown
    GET
    http://ocsp.thawte.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQwF4prw9S7mCbCEHD%2Fyl6nWPkczAQUe1tFz6%2FOy3r9MZIaarbzRutXSFACEEeXTXhzpbyrDS%2BzcBkvzl4%3D
    s399.exe
    Remote address:
    23.51.123.27:80
    Request
    GET /MFEwTzBNMEswSTAJBgUrDgMCGgUABBQwF4prw9S7mCbCEHD%2Fyl6nWPkczAQUe1tFz6%2FOy3r9MZIaarbzRutXSFACEEeXTXhzpbyrDS%2BzcBkvzl4%3D HTTP/1.1
    Connection: Keep-Alive
    Accept: */*
    User-Agent: Microsoft-CryptoAPI/6.1
    Host: ocsp.thawte.com
    Response
    HTTP/1.1 200 OK
    Server: nginx
    Content-Type: application/ocsp-response
    Content-Length: 5
    Cache-Control: public, max-age=300
    X-XSS-Protection: 1; mode=block
    X-Frame-Options: SAMEORIGIN
    X-Content-Type-Options: nosniff
    Date: Tue, 29 Nov 2022 01:02:11 GMT
    Connection: keep-alive
  • flag-unknown
    GET
    http://ocsp.thawte.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQwF4prw9S7mCbCEHD%2Fyl6nWPkczAQUe1tFz6%2FOy3r9MZIaarbzRutXSFACEEeXTXhzpbyrDS%2BzcBkvzl4%3D
    s399.exe
    Remote address:
    23.51.123.27:80
    Request
    GET /MFEwTzBNMEswSTAJBgUrDgMCGgUABBQwF4prw9S7mCbCEHD%2Fyl6nWPkczAQUe1tFz6%2FOy3r9MZIaarbzRutXSFACEEeXTXhzpbyrDS%2BzcBkvzl4%3D HTTP/1.1
    Cache-Control: no-cache
    Connection: Keep-Alive
    Pragma: no-cache
    Accept: */*
    User-Agent: Microsoft-CryptoAPI/6.1
    Host: ocsp.thawte.com
    Response
    HTTP/1.1 200 OK
    Server: nginx
    Content-Type: application/ocsp-response
    Content-Length: 5
    Cache-Control: public, max-age=300
    X-XSS-Protection: 1; mode=block
    X-Frame-Options: SAMEORIGIN
    X-Content-Type-Options: nosniff
    Date: Tue, 29 Nov 2022 01:02:12 GMT
    Connection: keep-alive
  • flag-unknown
    DNS
    crl.thawte.com
    s399.exe
    Remote address:
    8.8.8.8:53
    Request
    crl.thawte.com
    IN A
    Response
    crl.thawte.com
    IN CNAME
    crl-symcprod.digicert.com
    crl-symcprod.digicert.com
    IN CNAME
    cs9.wac.phicdn.net
    cs9.wac.phicdn.net
    IN A
    72.21.91.29
  • flag-unknown
    DNS
    th.symcd.com
    s399.exe
    Remote address:
    8.8.8.8:53
    Request
    th.symcd.com
    IN A
    Response
    th.symcd.com
    IN CNAME
    ocsp-ds.ws.symantec.com.edgekey.net
    ocsp-ds.ws.symantec.com.edgekey.net
    IN CNAME
    e8218.dscb1.akamaiedge.net
    e8218.dscb1.akamaiedge.net
    IN A
    23.51.123.27
  • flag-unknown
    GET
    http://th.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBRsif7263KedmR2MLuYKv9%2BWQCtWAQU1A1lP3q9NMb%2BR%2BdMDcC98t4Vq3ECEH1FCfATdbNJ8t5mvxWkjNc%3D
    s399.exe
    Remote address:
    23.51.123.27:80
    Request
    GET /MFEwTzBNMEswSTAJBgUrDgMCGgUABBRsif7263KedmR2MLuYKv9%2BWQCtWAQU1A1lP3q9NMb%2BR%2BdMDcC98t4Vq3ECEH1FCfATdbNJ8t5mvxWkjNc%3D HTTP/1.1
    Connection: Keep-Alive
    Accept: */*
    User-Agent: Microsoft-CryptoAPI/6.1
    Host: th.symcd.com
    Response
    HTTP/1.1 200 OK
    Server: nginx
    Content-Type: application/ocsp-response
    Content-Length: 1441
    Cache-Control: public, max-age=86400
    X-XSS-Protection: 1; mode=block
    X-Frame-Options: SAMEORIGIN
    X-Content-Type-Options: nosniff
    Date: Tue, 29 Nov 2022 01:02:22 GMT
    Connection: keep-alive
  • flag-unknown
    DNS
    c8400.northstar.api.socdn.com
    s399.exe
    Remote address:
    8.8.8.8:53
    Request
    c8400.northstar.api.socdn.com
    IN A
    Response
    c8400.northstar.api.socdn.com
    IN CNAME
    615321.parkingcrew.net
    615321.parkingcrew.net
    IN A
    76.223.26.96
    615321.parkingcrew.net
    IN A
    13.248.148.254
  • flag-unknown
    GET
    http://c8400.northstar.api.socdn.com/installer/5475a1dd-a818-4ddb-ae0b-49f50a000013/15801325/config
    s399.exe
    Remote address:
    76.223.26.96:80
    Request
    GET /installer/5475a1dd-a818-4ddb-ae0b-49f50a000013/15801325/config HTTP/1.1
    User-Agent: DownloadMR/3.1.37 (MSIE 9.11;Windows NT 6.1.7601 SP1;WOW64;.NET CLR 2.0.50727 SP2; .NET CLR 3.0 SP2; .NET CLR 3.5 SP1; .NET CLR 4; .NET CLR 4.0;DB IE11;m=System Product Name;u=Admin;northstar;ecc5fae7-ff07-a8a9-c1c2-259a79fe0a76)
    Accept-Language: en-US
    Host: c8400.northstar.api.socdn.com
    Connection: Keep-Alive
    Response
    HTTP/1.1 200 OK
    Date: Tue, 29 Nov 2022 01:02:30 GMT
    Content-Type: text/html; charset=UTF-8
    Transfer-Encoding: chunked
    Connection: keep-alive
    Server: nginx
    Vary: Accept-Encoding
    Vary: Accept-Encoding
    X-Redirect: zeropark_yahoo
    X-Template: tpl_CleanPeppermintBlack_twoclick
    X-Language: english
    Accept-CH: viewport-width
    Accept-CH: dpr
    Accept-CH: device-memory
    Accept-CH: rtt
    Accept-CH: downlink
    Accept-CH: ect
    Accept-CH: ua
    Accept-CH: ua-full-version
    Accept-CH: ua-platform
    Accept-CH: ua-platform-version
    Accept-CH: ua-arch
    Accept-CH: ua-model
    Accept-CH: ua-mobile
    Accept-CH-Lifetime: 30
  • flag-unknown
    POST
    http://c8400.northstar.api.socdn.com/installer/5475a1dd-a818-4ddb-ae0b-49f50a000013/15801325/event
    s399.exe
    Remote address:
    76.223.26.96:80
    Request
    POST /installer/5475a1dd-a818-4ddb-ae0b-49f50a000013/15801325/event HTTP/1.1
    User-Agent: DownloadMR/3.1.37 (MSIE 9.11;Windows NT 6.1.7601 SP1;WOW64;.NET CLR 2.0.50727 SP2; .NET CLR 3.0 SP2; .NET CLR 3.5 SP1; .NET CLR 4; .NET CLR 4.0;DB IE11;m=System Product Name;u=Admin;northstar;ecc5fae7-ff07-a8a9-c1c2-259a79fe0a76)
    Accept-Language: en-US
    Content-Type: application/x-www-form-urlencoded
    Host: c8400.northstar.api.socdn.com
    Content-Length: 12693
    Expect: 100-continue
    Response
    HTTP/1.1 403 Forbidden
    Date: Tue, 29 Nov 2022 01:02:32 GMT
    Content-Type: text/html
    Content-Length: 548
    Connection: keep-alive
    Server: nginx
    Vary: Accept-Encoding
  • 23.51.123.27:80
    http://ocsp.thawte.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQwF4prw9S7mCbCEHD%2Fyl6nWPkczAQUe1tFz6%2FOy3r9MZIaarbzRutXSFACEEeXTXhzpbyrDS%2BzcBkvzl4%3D
    http
    s399.exe
    789 B
     1.1kB
     6
    6

    HTTP Request

    GET http://ocsp.thawte.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQwF4prw9S7mCbCEHD%2Fyl6nWPkczAQUe1tFz6%2FOy3r9MZIaarbzRutXSFACEEeXTXhzpbyrDS%2BzcBkvzl4%3D

    HTTP Response

    200

    HTTP Request

    GET http://ocsp.thawte.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQwF4prw9S7mCbCEHD%2Fyl6nWPkczAQUe1tFz6%2FOy3r9MZIaarbzRutXSFACEEeXTXhzpbyrDS%2BzcBkvzl4%3D

    HTTP Response

    200
  • 72.21.91.29:80
    crl.thawte.com
    s399.exe
    152 B
     3
  • 23.51.123.27:80
    http://th.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBRsif7263KedmR2MLuYKv9%2BWQCtWAQU1A1lP3q9NMb%2BR%2BdMDcC98t4Vq3ECEH1FCfATdbNJ8t5mvxWkjNc%3D
    http
    s399.exe
    462 B
     1.9kB
     5
    4

    HTTP Request

    GET http://th.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBRsif7263KedmR2MLuYKv9%2BWQCtWAQU1A1lP3q9NMb%2BR%2BdMDcC98t4Vq3ECEH1FCfATdbNJ8t5mvxWkjNc%3D

    HTTP Response

    200
  • 76.223.26.96:80
    http://c8400.northstar.api.socdn.com/installer/5475a1dd-a818-4ddb-ae0b-49f50a000013/15801325/event
    http
    s399.exe
    14.6kB
     11.0kB
     23
    23

    HTTP Request

    GET http://c8400.northstar.api.socdn.com/installer/5475a1dd-a818-4ddb-ae0b-49f50a000013/15801325/config

    HTTP Response

    200

    HTTP Request

    POST http://c8400.northstar.api.socdn.com/installer/5475a1dd-a818-4ddb-ae0b-49f50a000013/15801325/event

    HTTP Response

    403
  • 8.8.8.8:53
    ocsp.thawte.com
    dns
    s399.exe
    61 B
     163 B
     1
    1

    DNS Request

    ocsp.thawte.com

    DNS Response

    23.51.123.27

  • 8.8.8.8:53
    crl.thawte.com
    dns
    s399.exe
    60 B
     144 B
     1
    1

    DNS Request

    crl.thawte.com

    DNS Response

    72.21.91.29

  • 8.8.8.8:53
    th.symcd.com
    dns
    s399.exe
    58 B
     160 B
     1
    1

    DNS Request

    th.symcd.com

    DNS Response

    23.51.123.27

  • 8.8.8.8:53
    c8400.northstar.api.socdn.com
    dns
    s399.exe
    75 B
     143 B
     1
    1

    DNS Request

    c8400.northstar.api.socdn.com

    DNS Response

    76.223.26.96
    13.248.148.254

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\n399\s399.exe
    Filesize

    230KB

    MD5

    abaf13cb23de482dc944ab5b51ca3aac

    SHA1

    76837356db96dd56b647aba60f1adbbdc7b200fe

    SHA256

    b02fad5ac5234401505e1682c86f526951e8ded726687088c30987321f7c105e

    SHA512

    cc2aac30490511e49e1268f5df9139d176a3b849e663ad3b739e2f1cb50a6e084c465772ded5f694d5ec6f19ac40a57e5e64f7c47515f212476c20cbe9d6bce3

    Download Submit

  • C:\Users\Admin\AppData\Local\Temp\n399\s399.exe
    Filesize

    230KB

    MD5

    abaf13cb23de482dc944ab5b51ca3aac

    SHA1

    76837356db96dd56b647aba60f1adbbdc7b200fe

    SHA256

    b02fad5ac5234401505e1682c86f526951e8ded726687088c30987321f7c105e

    SHA512

    cc2aac30490511e49e1268f5df9139d176a3b849e663ad3b739e2f1cb50a6e084c465772ded5f694d5ec6f19ac40a57e5e64f7c47515f212476c20cbe9d6bce3

    Download Submit

  • \Users\Admin\AppData\Local\Temp\n399\s399.exe
    Filesize

    230KB

    MD5

    abaf13cb23de482dc944ab5b51ca3aac

    SHA1

    76837356db96dd56b647aba60f1adbbdc7b200fe

    SHA256

    b02fad5ac5234401505e1682c86f526951e8ded726687088c30987321f7c105e

    SHA512

    cc2aac30490511e49e1268f5df9139d176a3b849e663ad3b739e2f1cb50a6e084c465772ded5f694d5ec6f19ac40a57e5e64f7c47515f212476c20cbe9d6bce3

    Download Submit

  • \Users\Admin\AppData\Local\Temp\n399\s399.exe
    Filesize

    230KB

    MD5

    abaf13cb23de482dc944ab5b51ca3aac

    SHA1

    76837356db96dd56b647aba60f1adbbdc7b200fe

    SHA256

    b02fad5ac5234401505e1682c86f526951e8ded726687088c30987321f7c105e

    SHA512

    cc2aac30490511e49e1268f5df9139d176a3b849e663ad3b739e2f1cb50a6e084c465772ded5f694d5ec6f19ac40a57e5e64f7c47515f212476c20cbe9d6bce3

    Download Submit

  • \Users\Admin\AppData\Local\Temp\n399\s399.exe
    Filesize

    230KB

    MD5

    abaf13cb23de482dc944ab5b51ca3aac

    SHA1

    76837356db96dd56b647aba60f1adbbdc7b200fe

    SHA256

    b02fad5ac5234401505e1682c86f526951e8ded726687088c30987321f7c105e

    SHA512

    cc2aac30490511e49e1268f5df9139d176a3b849e663ad3b739e2f1cb50a6e084c465772ded5f694d5ec6f19ac40a57e5e64f7c47515f212476c20cbe9d6bce3

    Download Submit

  • \Users\Admin\AppData\Local\Temp\n399\s399.exe
    Filesize

    230KB

    MD5

    abaf13cb23de482dc944ab5b51ca3aac

    SHA1

    76837356db96dd56b647aba60f1adbbdc7b200fe

    SHA256

    b02fad5ac5234401505e1682c86f526951e8ded726687088c30987321f7c105e

    SHA512

    cc2aac30490511e49e1268f5df9139d176a3b849e663ad3b739e2f1cb50a6e084c465772ded5f694d5ec6f19ac40a57e5e64f7c47515f212476c20cbe9d6bce3

    Download Submit

  • memory/1036-62-0x000007FEF3D60000-0x000007FEF4783000-memory.dmp

    Filesize

    10.1MB

    Download

  • memory/1036-63-0x000007FEF2CC0000-0x000007FEF3D56000-memory.dmp

    Filesize

    16.6MB

    Download

  • memory/1036-64-0x0000000001FF6000-0x0000000002015000-memory.dmp

    Filesize

    124KB

    Download

  • memory/1036-65-0x000007FEED9F0000-0x000007FEEE87F000-memory.dmp

    Filesize

    14.6MB

    Download

  • memory/1036-66-0x000007FEF21E0000-0x000007FEF24CA000-memory.dmp

    Filesize

    2.9MB

    Download

  • memory/1036-67-0x0000000001FF6000-0x0000000002015000-memory.dmp

    Filesize

    124KB

    Download

  • memory/1340-54-0x0000000074DE1000-0x0000000074DE3000-memory.dmp

    Filesize

    8KB

    Download

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