Analysis

  • max time kernel
    146s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-06-2024 23:03

General

  • Target

    Nitro Generator v1.exe

  • Size

    225KB

  • MD5

    a2da88430b3dd46d547cd75126ecee69

  • SHA1

    c41229461c4b6ddc695c8a01940e76a0f0b930b7

  • SHA256

    c95d4d86a71f2b53bf73a48d9b04f924f2527c7886b7db877b2d339ecda9ef12

  • SHA512

    c3dcfa26d3c2a10f5ac58cd22f2c5bf5fbb986c11a43a547e0ea1f4ac016819de46bfadab6d111e83c2c9f572285a7f3ea4e275944ef7c16bf98426283fac859

  • SSDEEP

    3072:LVAzYZD5kDzAgXKnj8meFDm8Zk5WFEw2zlXPcARAK4Mtx1Nnva/Vk5uAOcU3aQg7:LVBZ+DsfnwmlMkQEaARV4MT6dY9Mg59

Malware Config

Extracted

Family

xworm

C2

runderscore00-25851.portmap.host:25851

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    USB.exe

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 4 IoCs
  • Adds Run key to start application 2 TTPs 1 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.

  • Drops file in Windows directory 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Using powershell.exe command.

  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Nitro Generator v1.exe
    "C:\Users\Admin\AppData\Local\Temp\Nitro Generator v1.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:2716
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGoAaQBuACMAPgBBAGQAZAAtAFQAeQBwAGUAIAAtAEEAcwBzAGUAbQBiAGwAeQBOAGEAbQBlACAAUwB5AHMAdABlAG0ALgBXAGkAbgBkAG8AdwBzAC4ARgBvAHIAbQBzADsAPAAjAGYAYQB6ACMAPgBbAFMAeQBzAHQAZQBtAC4AVwBpAG4AZABvAHcAcwAuAEYAbwByAG0AcwAuAE0AZQBzAHMAYQBnAGUAQgBvAHgAXQA6ADoAUwBoAG8AdwAoACcASQBuAHYAYQBsAGkAZAAgAE8AUwAgAFQAeQBwAGUAIAB4ADgANgAsACAAPwA/AD8APwA/ACcALAAnACcALAAnAE8ASwAnACwAJwBFAHIAcgBvAHIAJwApADwAIwBzAG0AdgAjAD4A"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4852
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHMAYwBnACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGUAegBjACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAHoAcAB1ACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAHIAYQBmACMAPgA="
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:5044
    • C:\Users\Admin\AppData\Local\Temp\NitroGen.exe
      "C:\Users\Admin\AppData\Local\Temp\NitroGen.exe"
      2⤵
      • Executes dropped EXE
      PID:880
    • C:\Windows\Nitro Generator.exe
      "C:\Windows\Nitro Generator.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:244
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:968
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:648
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3148

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

    Filesize

    2KB

    MD5

    627073ee3ca9676911bee35548eff2b8

    SHA1

    4c4b68c65e2cab9864b51167d710aa29ebdcff2e

    SHA256

    85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

    SHA512

    3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svchost.log

    Filesize

    654B

    MD5

    2cbbb74b7da1f720b48ed31085cbd5b8

    SHA1

    79caa9a3ea8abe1b9c4326c3633da64a5f724964

    SHA256

    e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

    SHA512

    ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    1KB

    MD5

    0f0f33b5dc59d6998bdba6a65e602a1c

    SHA1

    80c26491daacdd38a1f174ea5a6be01532bc1da9

    SHA256

    a5e18203246fdf1199469165357bd5329f0e8f4a77282045c01a43cba0a7e2ed

    SHA512

    12027f852b46df30587773e35cd2e380a4876557b2b857dcbbbf3650e44c8c88e4c0ea085d125e5c19258d860e0a4bf27f48c7f0a9ec4181f03534df1d91ef4f

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

    Filesize

    139KB

    MD5

    16c70bc93e70148d8e32877fb69c5163

    SHA1

    9997631ad75d02297a4c7a06c37db115a0a1c0ec

    SHA256

    b0c0ffb63ae352291b03770b081847a349f1c221a6f3a0cca1570050261f9f3d

    SHA512

    02242bdaa7b78378d3f8fc85f6a9d51eb8672a348c718ac4483dcddcf061994d8dc7dc8ead58a0b6903d44d9dc06ff17e4782598f25ac5e4ffd8a528a05373dd

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_c14k0kjf.zq3.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Windows\Nitro Generator.exe

    Filesize

    77KB

    MD5

    8bbf53c41f2625a3c4e608ad13cb2c55

    SHA1

    3335287d42f6e674eb1d4465949e02d262bb8391

    SHA256

    ae5a9dec7624bf30d8b8f9659dd6969973969a88933790fedff2f5717745e299

    SHA512

    9c568dff7a8cbeb26997fdb17c7cc1c2a1fc3d060cf83fdbf1a5b994da8e04cf2e03a2f6a5406005d8edd77d3a497617f89c9cc2575b76c0ac0f0ceef97b60ec

  • memory/244-46-0x0000000000530000-0x000000000054A000-memory.dmp

    Filesize

    104KB

  • memory/2716-0-0x00000000005C0000-0x00000000005FE000-memory.dmp

    Filesize

    248KB

  • memory/2716-1-0x00007FFF96EB3000-0x00007FFF96EB5000-memory.dmp

    Filesize

    8KB

  • memory/2716-2-0x00007FFF96EB0000-0x00007FFF97972000-memory.dmp

    Filesize

    10.8MB

  • memory/2716-48-0x00007FFF96EB0000-0x00007FFF97972000-memory.dmp

    Filesize

    10.8MB

  • memory/4852-7-0x000001CB69FA0000-0x000001CB69FC2000-memory.dmp

    Filesize

    136KB

  • memory/4852-15-0x00007FFF96EB0000-0x00007FFF97972000-memory.dmp

    Filesize

    10.8MB

  • memory/4852-54-0x00007FFF96EB0000-0x00007FFF97972000-memory.dmp

    Filesize

    10.8MB

  • memory/4852-14-0x00007FFF96EB0000-0x00007FFF97972000-memory.dmp

    Filesize

    10.8MB

  • memory/4852-13-0x00007FFF96EB0000-0x00007FFF97972000-memory.dmp

    Filesize

    10.8MB

  • memory/4852-12-0x00007FFF96EB0000-0x00007FFF97972000-memory.dmp

    Filesize

    10.8MB