stormkitty | 0bc6914fa7a3303d3a3a3682c17402b1fa5a55f95b9f05b8e01b5cd7b589435f

General

Target

XClient21.exe
Size

65KB
MD5

1f0562410589065ddf2069df97270eb0
SHA1

8c96e3b03034a206e5fe6146cbfc08c425215a04
SHA256

0bc6914fa7a3303d3a3a3682c17402b1fa5a55f95b9f05b8e01b5cd7b589435f
SHA512

98e3cc133e91a0fb8c7d169abfc53d461fdb654d656cda7ff259fa88f918288f80f0ea4b2e185b861f211ec6b7246a82d3dccb52ba623ebc7ba0565339c5c59d
SSDEEP

1536:hdS7RGHg/yHtTyn/xb1h+bkCtFZ62yInODbOxI9Pm:fSWgKqxb1h+bkGyInODbOxIlm

Score

10^/10

stormkitty xworm discovery execution persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

C2

teaching-ada.gl.at.ply.gg:30074

Attributes

Install_directory
%Temp%
install_file
svhost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/1744-1-0x0000000000CD0000-0x0000000000CE6000-memory.dmp	family_xworm
behavioral1/files/0x0013000000023ad0-101.dat	family_xworm

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

StormKitty payload 1 IoCs

resource	yara_rule
behavioral1/memory/1744-60-0x000000001E140000-0x000000001E260000-memory.dmp	family_stormkitty

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1416	powershell.exe
3508	powershell.exe
4256	powershell.exe
1556	powershell.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	XClient21.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	XClient21.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	XClient21.exe

Executes dropped EXE 1 IoCs

pid	Process
3448	svhost.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Local\\Temp\\svhost.exe"	XClient21.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
3584	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1416	powershell.exe
1416	powershell.exe
3508	powershell.exe
3508	powershell.exe
4256	powershell.exe
4256	powershell.exe
1556	powershell.exe
1556	powershell.exe
1744	XClient21.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1744	XClient21.exe
Token: SeDebugPrivilege	1416	powershell.exe
Token: SeDebugPrivilege	3508	powershell.exe
Token: SeDebugPrivilege	4256	powershell.exe
Token: SeDebugPrivilege	1556	powershell.exe
Token: SeDebugPrivilege	1744	XClient21.exe
Token: SeDebugPrivilege	3448	svhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1744	XClient21.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1744 wrote to memory of 1416	1744	XClient21.exe	92
PID 1744 wrote to memory of 1416	1744	XClient21.exe	92
PID 1744 wrote to memory of 3508	1744	XClient21.exe	94
PID 1744 wrote to memory of 3508	1744	XClient21.exe	94
PID 1744 wrote to memory of 4256	1744	XClient21.exe	97
PID 1744 wrote to memory of 4256	1744	XClient21.exe	97
PID 1744 wrote to memory of 1556	1744	XClient21.exe	99
PID 1744 wrote to memory of 1556	1744	XClient21.exe	99
PID 1744 wrote to memory of 3584	1744	XClient21.exe	101
PID 1744 wrote to memory of 3584	1744	XClient21.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:\Users\Admin\AppData\Local\Temp\XClient21.exe
"C:\Users\Admin\AppData\Local\Temp\XClient21.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1744
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XClient21.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1416
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient21.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3508
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\svhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4256
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1556
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svhost" /tr "C:\Users\Admin\AppData\Local\Temp\svhost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3584

C:\Users\Admin\AppData\Local\Temp\svhost.exe
C:\Users\Admin\AppData\Local\Temp\svhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Browser Information Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
2979eabc783eaca50de7be23dd4eafcf

SHA1
d709ce5f3a06b7958a67e20870bfd95b83cad2ea

SHA256
006cca90e78fbb571532a83082ac6712721a34ea4b21f490058ffb3f521f4903

SHA512
92bc433990572d9427d0c93eef9bd1cc23fa00ed60dd0c9c983d87d3421e02ce3f156c6f88fe916ef6782dbf185cbce083bc0094f8c527f302be6a37d1c53aba

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

Filesize
944B

MD5
0aa63dbb46d451e47a7a682c64af776d

SHA1
3b0026f2dae8e9c491ccaa40133755779de35aaa

SHA256
9158038718d41172c22a3c1a15852405e3e1c8e2c44fa066328eb1520e5d977b

SHA512
4d2564850c2ab1bc71089412f19147df4a1cd3075aa2039aa894271b333cd9c510b7ba4d70889f24d45d8b366d8b5167abdcf24314e4753420337c7d34e7c43f

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

Filesize
944B

MD5
110b59ca4d00786d0bde151d21865049

SHA1
557e730d93fdf944a0cad874022df1895fb5b2e2

SHA256
77f69011c214ea5a01fd2035d781914c4893aee66d784deadc22179eadfdf77f

SHA512
cb55ac6eca50f4427718bace861679c88b2fdfea94d30209e8d61ca73a6ce9f8c4b5334922d2660a829b0636d20cbdf3bae1497c920e604efe6c636019feb10e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hj42gxpu.am4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\svhost.exe

Filesize
65KB

MD5
1f0562410589065ddf2069df97270eb0

SHA1
8c96e3b03034a206e5fe6146cbfc08c425215a04

SHA256
0bc6914fa7a3303d3a3a3682c17402b1fa5a55f95b9f05b8e01b5cd7b589435f

SHA512
98e3cc133e91a0fb8c7d169abfc53d461fdb654d656cda7ff259fa88f918288f80f0ea4b2e185b861f211ec6b7246a82d3dccb52ba623ebc7ba0565339c5c59d

Download Submit
memory/1416-12-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/1416-17-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/1416-14-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/1416-13-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/1416-7-0x00000134E67B0000-0x00000134E67D2000-memory.dmp

Filesize
136KB

Download
memory/1744-0-0x00007FF878A33000-0x00007FF878A35000-memory.dmp

Filesize
8KB

Download
memory/1744-56-0x00007FF878A33000-0x00007FF878A35000-memory.dmp

Filesize
8KB

Download
memory/1744-57-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/1744-58-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/1744-59-0x000000001B980000-0x000000001B98C000-memory.dmp

Filesize
48KB

Download
memory/1744-60-0x000000001E140000-0x000000001E260000-memory.dmp

Filesize
1.1MB

Download
memory/1744-1-0x0000000000CD0000-0x0000000000CE6000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads