Analysis

  • max time kernel
    146s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-08-2024 00:07

General

  • Target

    bf3bb84cd01c19a5e1a00c9cf975ad8e5dcee257c43087768760a317b7dca2c3.exe

  • Size

    9.7MB

  • MD5

    b0dc9d6835d6f7709491abf442fd72f5

  • SHA1

    e9a3be12a05c077ceaf1adc4f58f9e76863e9e63

  • SHA256

    bf3bb84cd01c19a5e1a00c9cf975ad8e5dcee257c43087768760a317b7dca2c3

  • SHA512

    87ba3a6a79644f7c224c558594c5d3bc5a60878b006b06fec019d4bc66ee3542e24ce6b3e1e4f17b4c9c8858d5612384bc4cbadc84f2258f37970db60628977b

  • SSDEEP

    196608:OPbB2M/X7E2/swFyCBMoM2j+tOnXYOu/4Djxp:Y2M/XY4swFBBMGytOnG/4D1p

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

95.211.208.153:6606

95.211.208.153:7707

95.211.208.153:8808

5512.sytes.net:6606

5512.sytes.net:7707

5512.sytes.net:8808

Mutex

Llg9a02PERRO

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Obfuscated Files or Information: Command Obfuscation 1 TTPs

    Adversaries may obfuscate content during command execution to impede detection.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bf3bb84cd01c19a5e1a00c9cf975ad8e5dcee257c43087768760a317b7dca2c3.exe
    "C:\Users\Admin\AppData\Local\Temp\bf3bb84cd01c19a5e1a00c9cf975ad8e5dcee257c43087768760a317b7dca2c3.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2484
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGQAdQBjACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGgAbQB4ACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAGkAZwB6ACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAHkAcwBzACMAPgA="
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3964
    • C:\Users\Admin\AppData\Local\Temp\Zcsbaibfhun.exe
      "C:\Users\Admin\AppData\Local\Temp\Zcsbaibfhun.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:860
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1424
    • C:\Users\Admin\AppData\Local\Temp\Set-up.exe
      "C:\Users\Admin\AppData\Local\Temp\Set-up.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Modifies Internet Explorer settings
      • Modifies system certificate store
      PID:428

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Set-up.exe

    Filesize

    7.3MB

    MD5

    0d9e0caef3acad368792e4484b345eba

    SHA1

    f5024d10c036f6ae575c9ea21e567b57498a0df6

    SHA256

    79eec3e5bb9282f7ebab09a8566558e8a52934df174f129677a4771d5383a3db

    SHA512

    0a5fa7f74f4c9984f9b1a9e36d2adfe9bb06a7b9128878766a85e462ea370fd864285a902b68297922ecfd7cf5d0bd6955f51f1abc1db980768ae7bf1a8b1e00

  • C:\Users\Admin\AppData\Local\Temp\Zcsbaibfhun.exe

    Filesize

    2.4MB

    MD5

    5870c41c149fdd038336b2a1b2103e2f

    SHA1

    d3efce3cc94fb928113481aee8d58cdeea24a708

    SHA256

    9b489f300c3797e9d343a47ecd96e83646a61b02c28b5e68071d26a5a666c929

    SHA512

    9fdbc2281e54dc640e8b2598faedabffe70f3fc739d88a603c0d43a8496fc08b07fcebd63fabd11d69c3393edb28eec867ab505a5c694ebe17632d04fe8952a7

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_w5kibgqq.nhk.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/860-85-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-101-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-105-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-4976-0x0000000073860000-0x0000000074010000-memory.dmp

    Filesize

    7.7MB

  • memory/860-4971-0x0000000006F80000-0x0000000006FD4000-memory.dmp

    Filesize

    336KB

  • memory/860-27-0x0000000005490000-0x00000000056B0000-memory.dmp

    Filesize

    2.1MB

  • memory/860-32-0x00000000067E0000-0x0000000006A02000-memory.dmp

    Filesize

    2.1MB

  • memory/860-33-0x0000000073860000-0x0000000074010000-memory.dmp

    Filesize

    7.7MB

  • memory/860-35-0x0000000006FD0000-0x0000000007574000-memory.dmp

    Filesize

    5.6MB

  • memory/860-37-0x0000000006B30000-0x0000000006BC2000-memory.dmp

    Filesize

    584KB

  • memory/860-4969-0x00000000053B0000-0x00000000053FC000-memory.dmp

    Filesize

    304KB

  • memory/860-20-0x0000000000740000-0x00000000009A2000-memory.dmp

    Filesize

    2.4MB

  • memory/860-4968-0x0000000005350000-0x00000000053AC000-memory.dmp

    Filesize

    368KB

  • memory/860-95-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-14-0x000000007386E000-0x000000007386F000-memory.dmp

    Filesize

    4KB

  • memory/860-97-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-83-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-93-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-91-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-89-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-87-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-103-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-79-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-81-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-77-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-75-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-73-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-71-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-69-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-67-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-65-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-64-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-61-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-59-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-57-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-55-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-53-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-51-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-50-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-109-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-113-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-111-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-107-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/860-99-0x00000000067E0000-0x00000000069FC000-memory.dmp

    Filesize

    2.1MB

  • memory/1424-4979-0x0000000005930000-0x00000000059CC000-memory.dmp

    Filesize

    624KB

  • memory/1424-4975-0x0000000000400000-0x0000000000412000-memory.dmp

    Filesize

    72KB

  • memory/3964-36-0x0000000004EB0000-0x0000000004ED2000-memory.dmp

    Filesize

    136KB

  • memory/3964-147-0x0000000005DB0000-0x0000000005DFC000-memory.dmp

    Filesize

    304KB

  • memory/3964-146-0x0000000005D80000-0x0000000005D9E000-memory.dmp

    Filesize

    120KB

  • memory/3964-34-0x0000000073860000-0x0000000074010000-memory.dmp

    Filesize

    7.7MB

  • memory/3964-49-0x00000000057C0000-0x0000000005B14000-memory.dmp

    Filesize

    3.3MB

  • memory/3964-165-0x0000000006D50000-0x0000000006D6E000-memory.dmp

    Filesize

    120KB

  • memory/3964-166-0x0000000006D70000-0x0000000006E13000-memory.dmp

    Filesize

    652KB

  • memory/3964-168-0x00000000070A0000-0x00000000070BA000-memory.dmp

    Filesize

    104KB

  • memory/3964-169-0x0000000007110000-0x000000000711A000-memory.dmp

    Filesize

    40KB

  • memory/3964-170-0x0000000007330000-0x00000000073C6000-memory.dmp

    Filesize

    600KB

  • memory/3964-167-0x00000000076E0000-0x0000000007D5A000-memory.dmp

    Filesize

    6.5MB

  • memory/3964-155-0x0000000074130000-0x000000007417C000-memory.dmp

    Filesize

    304KB

  • memory/3964-154-0x0000000006340000-0x0000000006372000-memory.dmp

    Filesize

    200KB

  • memory/3964-1326-0x0000000004AE0000-0x0000000004AF1000-memory.dmp

    Filesize

    68KB

  • memory/3964-3138-0x0000000007300000-0x000000000730E000-memory.dmp

    Filesize

    56KB

  • memory/3964-3616-0x0000000007310000-0x0000000007324000-memory.dmp

    Filesize

    80KB

  • memory/3964-3989-0x00000000073F0000-0x000000000740A000-memory.dmp

    Filesize

    104KB

  • memory/3964-4190-0x00000000073E0000-0x00000000073E8000-memory.dmp

    Filesize

    32KB

  • memory/3964-38-0x00000000056E0000-0x0000000005746000-memory.dmp

    Filesize

    408KB

  • memory/3964-39-0x0000000005750000-0x00000000057B6000-memory.dmp

    Filesize

    408KB

  • memory/3964-4970-0x0000000073860000-0x0000000074010000-memory.dmp

    Filesize

    7.7MB

  • memory/3964-26-0x0000000073860000-0x0000000074010000-memory.dmp

    Filesize

    7.7MB

  • memory/3964-25-0x0000000004F40000-0x0000000005568000-memory.dmp

    Filesize

    6.2MB

  • memory/3964-21-0x00000000027B0000-0x00000000027E6000-memory.dmp

    Filesize

    216KB

  • memory/3964-24-0x0000000073860000-0x0000000074010000-memory.dmp

    Filesize

    7.7MB