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Overview

overview

10

Static

static

10

3b03a24bfd...fc.exe

windows7-x64

10

3b03a24bfd...fc.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/08/2024, 01:18 UTC

Sharing

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General

  • Target

    3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe

  • Size

    204KB

  • MD5

    dfcfcd78d212140c3b087d315d5ed33b

  • SHA1

    a3a5f02aa532c70f3452763ed6fbdfa03a7fac44

  • SHA256

    3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc

  • SHA512

    8dd40a9d957745926f519f97a03a5727f79f120477aa624e7f8f48d6b5275f6b45df4ee998868dd4ff738f9851a0aac32df13b1674ca528cdf5fefc731ed4da7

  • SSDEEP

    3072:dURcxswS6PMVSsl3H1bNSGQNWwfBtOEp7ybMj/0vU7yZED+CDgbB+Y:d3S6PMVNVbR0W6mEpmbMjgU7yZf8

Score
10/10
asyncratrat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Mutex

server.underground-cheat.xyz

Attributes
  • delay

    1

  • install

    true

  • install_file

    WinUpdate.exe

  • install_folder

    %AppData%

aes.plain
1
Vm0xf52KQ66Nj5QxIiMQ4ayZZmFGAOUj

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

    ratasyncrat
  • Async RAT payload 1 IoCs
    rat
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 10 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.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe
    "C:\Users\Admin\AppData\Local\Temp\3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2512
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3184
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1776
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD30F.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4984
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3432
      • C:\Users\Admin\AppData\Roaming\WinUpdate.exe
        "C:\Users\Admin\AppData\Roaming\WinUpdate.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:2448

Network

  • flag-us
    DNS
    g.bing.com
    Remote address:
    8.8.8.8:53
    Request
    g.bing.com
    IN A
    Response
    g.bing.com
    IN CNAME
    g-bing-com.dual-a-0034.a-msedge.net
    g-bing-com.dual-a-0034.a-msedge.net
    IN CNAME
    dual-a-0034.a-msedge.net
    dual-a-0034.a-msedge.net
    IN A
    204.79.197.237
    dual-a-0034.a-msedge.net
    IN A
    13.107.21.237
  • flag-us
    GET
    https://g.bing.com/neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=8d760ded0b824124b9c066399f3d862d&localId=w:58F15D5C-450D-8348-2910-A8A47129F4C2&deviceId=6825833575955334&anid=
    Remote address:
    204.79.197.237:443
    Request
    GET /neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=8d760ded0b824124b9c066399f3d862d&localId=w:58F15D5C-450D-8348-2910-A8A47129F4C2&deviceId=6825833575955334&anid= HTTP/2.0
    host: g.bing.com
    accept-encoding: gzip, deflate
    user-agent: WindowsShellClient/9.0.40929.0 (Windows)
    Response
    HTTP/2.0 204
    cache-control: no-cache, must-revalidate
    pragma: no-cache
    expires: Fri, 01 Jan 1990 00:00:00 GMT
    set-cookie: MUID=33FC0DE25F6E6AEC0AE919305E8E6BBB; domain=.bing.com; expires=Sat, 30-Aug-2025 01:18:49 GMT; path=/; SameSite=None; Secure; Priority=High;
    strict-transport-security: max-age=31536000; includeSubDomains; preload
    access-control-allow-origin: *
    x-cache: CONFIG_NOCACHE
    accept-ch: Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version
    x-msedge-ref: Ref A: A74F3485D39A4DE9844B98D9DE0AEDE1 Ref B: LON04EDGE1016 Ref C: 2024-08-05T01:18:49Z
    date: Mon, 05 Aug 2024 01:18:48 GMT
  • flag-us
    GET
    https://g.bing.com/neg/0?action=emptycreative&adUnitId=11730597&publisherId=251978541&rid=8d760ded0b824124b9c066399f3d862d&localId=w:58F15D5C-450D-8348-2910-A8A47129F4C2&deviceId=6825833575955334&anid=
    Remote address:
    204.79.197.237:443
    Request
    GET /neg/0?action=emptycreative&adUnitId=11730597&publisherId=251978541&rid=8d760ded0b824124b9c066399f3d862d&localId=w:58F15D5C-450D-8348-2910-A8A47129F4C2&deviceId=6825833575955334&anid= HTTP/2.0
    host: g.bing.com
    accept-encoding: gzip, deflate
    user-agent: WindowsShellClient/9.0.40929.0 (Windows)
    cookie: MUID=33FC0DE25F6E6AEC0AE919305E8E6BBB
    Response
    HTTP/2.0 204
    cache-control: no-cache, must-revalidate
    pragma: no-cache
    expires: Fri, 01 Jan 1990 00:00:00 GMT
    set-cookie: MSPTC=7tCUJee-Di3hLtTVoEI0quawZ9j1dQQgW7A1WfQPRSI; domain=.bing.com; expires=Sat, 30-Aug-2025 01:18:49 GMT; path=/; Partitioned; secure; SameSite=None
    strict-transport-security: max-age=31536000; includeSubDomains; preload
    access-control-allow-origin: *
    x-cache: CONFIG_NOCACHE
    accept-ch: Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version
    x-msedge-ref: Ref A: 24303D640BE246FBB0B33318F8E99A97 Ref B: LON04EDGE1016 Ref C: 2024-08-05T01:18:49Z
    date: Mon, 05 Aug 2024 01:18:48 GMT
  • flag-us
    GET
    https://g.bing.com/neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=8d760ded0b824124b9c066399f3d862d&localId=w:58F15D5C-450D-8348-2910-A8A47129F4C2&deviceId=6825833575955334&anid=
    Remote address:
    204.79.197.237:443
    Request
    GET /neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=8d760ded0b824124b9c066399f3d862d&localId=w:58F15D5C-450D-8348-2910-A8A47129F4C2&deviceId=6825833575955334&anid= HTTP/2.0
    host: g.bing.com
    accept-encoding: gzip, deflate
    user-agent: WindowsShellClient/9.0.40929.0 (Windows)
    cookie: MUID=33FC0DE25F6E6AEC0AE919305E8E6BBB; MSPTC=7tCUJee-Di3hLtTVoEI0quawZ9j1dQQgW7A1WfQPRSI
    Response
    HTTP/2.0 204
    cache-control: no-cache, must-revalidate
    pragma: no-cache
    expires: Fri, 01 Jan 1990 00:00:00 GMT
    strict-transport-security: max-age=31536000; includeSubDomains; preload
    access-control-allow-origin: *
    x-cache: CONFIG_NOCACHE
    accept-ch: Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version
    x-msedge-ref: Ref A: E8449EAA8B2C4BC5B05853AB846117CC Ref B: LON04EDGE1016 Ref C: 2024-08-05T01:18:49Z
    date: Mon, 05 Aug 2024 01:18:48 GMT
  • flag-us
    DNS
    4.159.190.20.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    4.159.190.20.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    237.197.79.204.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    237.197.79.204.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    240.221.184.93.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    240.221.184.93.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    86.23.85.13.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    86.23.85.13.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    15.164.165.52.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    15.164.165.52.in-addr.arpa
    IN PTR
    Response
  • flag-us
    DNS
    147.142.123.92.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    147.142.123.92.in-addr.arpa
    IN PTR
    Response
    147.142.123.92.in-addr.arpa
    IN PTR
    a92-123-142-147deploystaticakamaitechnologiescom
  • flag-us
    DNS
    48.229.111.52.in-addr.arpa
    Remote address:
    8.8.8.8:53
    Request
    48.229.111.52.in-addr.arpa
    IN PTR
    Response
  • 204.79.197.237:443
    https://g.bing.com/neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=8d760ded0b824124b9c066399f3d862d&localId=w:58F15D5C-450D-8348-2910-A8A47129F4C2&deviceId=6825833575955334&anid=
    tls, http2
    2.0kB
     9.3kB
     21
    18

    HTTP Request

    GET https://g.bing.com/neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=8d760ded0b824124b9c066399f3d862d&localId=w:58F15D5C-450D-8348-2910-A8A47129F4C2&deviceId=6825833575955334&anid=

    HTTP Response

    204

    HTTP Request

    GET https://g.bing.com/neg/0?action=emptycreative&adUnitId=11730597&publisherId=251978541&rid=8d760ded0b824124b9c066399f3d862d&localId=w:58F15D5C-450D-8348-2910-A8A47129F4C2&deviceId=6825833575955334&anid=

    HTTP Response

    204

    HTTP Request

    GET https://g.bing.com/neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=8d760ded0b824124b9c066399f3d862d&localId=w:58F15D5C-450D-8348-2910-A8A47129F4C2&deviceId=6825833575955334&anid=

    HTTP Response

    204
  • 52.111.227.14:443
    322 B
     7
  • 8.8.8.8:53
    g.bing.com
    dns
    56 B
     151 B
     1
    1

    DNS Request

    g.bing.com

    DNS Response

    204.79.197.237
    13.107.21.237

  • 8.8.8.8:53
    4.159.190.20.in-addr.arpa
    dns
    71 B
     157 B
     1
    1

    DNS Request

    4.159.190.20.in-addr.arpa

  • 8.8.8.8:53
    237.197.79.204.in-addr.arpa
    dns
    73 B
     143 B
     1
    1

    DNS Request

    237.197.79.204.in-addr.arpa

  • 8.8.8.8:53
    240.221.184.93.in-addr.arpa
    dns
    73 B
     144 B
     1
    1

    DNS Request

    240.221.184.93.in-addr.arpa

  • 8.8.8.8:53
    86.23.85.13.in-addr.arpa
    dns
    70 B
     144 B
     1
    1

    DNS Request

    86.23.85.13.in-addr.arpa

  • 8.8.8.8:53
    15.164.165.52.in-addr.arpa
    dns
    72 B
     146 B
     1
    1

    DNS Request

    15.164.165.52.in-addr.arpa

  • 8.8.8.8:53
    147.142.123.92.in-addr.arpa
    dns
    73 B
     139 B
     1
    1

    DNS Request

    147.142.123.92.in-addr.arpa

  • 8.8.8.8:53
    48.229.111.52.in-addr.arpa
    dns
    72 B
     158 B
     1
    1

    DNS Request

    48.229.111.52.in-addr.arpa

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpD30F.tmp.bat
    Filesize

    153B

    MD5

    d9027aa23428f789c5324fe20baab584

    SHA1

    7cfefedd35cfc2b234c7f200d1e5b572e6119183

    SHA256

    6ab2c6b595b424742d414dc3c88567abdbe3c06882906697145f07a5b2fe0671

    SHA512

    1138d4b90ff57ed2863f8ae97139fd5b1942cc1f96aef92e6f6585d11dae1e8e81415a271981628c95d38cc5dcf0cf8eaa96b99c696104ef0b45b82140912c3a

    Download Submit

  • C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
    Filesize

    8B

    MD5

    cf759e4c5f14fe3eec41b87ed756cea8

    SHA1

    c27c796bb3c2fac929359563676f4ba1ffada1f5

    SHA256

    c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

    SHA512

    c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

    Download Submit

  • C:\Users\Admin\AppData\Roaming\WinUpdate.exe
    Filesize

    204KB

    MD5

    dfcfcd78d212140c3b087d315d5ed33b

    SHA1

    a3a5f02aa532c70f3452763ed6fbdfa03a7fac44

    SHA256

    3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc

    SHA512

    8dd40a9d957745926f519f97a03a5727f79f120477aa624e7f8f48d6b5275f6b45df4ee998868dd4ff738f9851a0aac32df13b1674ca528cdf5fefc731ed4da7

    Download Submit

  • memory/2512-0-0x00007FFCECE23000-0x00007FFCECE25000-memory.dmp

    Filesize

    8KB

    Download

  • memory/2512-1-0x00000000001B0000-0x00000000001E8000-memory.dmp

    Filesize

    224KB

    Download

  • memory/2512-3-0x00007FFCECE20000-0x00007FFCED8E1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/2512-8-0x00007FFCECE20000-0x00007FFCED8E1000-memory.dmp

    Filesize

    10.8MB

    Download

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