stormkitty | 0e24f1d56bc9acda5afb857fdb2c96ee295fd9b34efab29e95eae849367bd5de

General

Target

XClient.exe
Size

145KB
MD5

9ed864b6eaabf32d1fa70cc6b0c0c39c
SHA1

7c657049d6b5dd79d1937fb33abfd8f6d58e4a9a
SHA256

0e24f1d56bc9acda5afb857fdb2c96ee295fd9b34efab29e95eae849367bd5de
SHA512

759201eaf5f4da105badbbce6a5db8c32e2c8a05a7a09ab45fdae38bc8573b1a51f5cb3633260ceb8e33cba6917bc38b13c910d76398988a532976ef2b2eba34
SSDEEP

1536:kztwdf7oj8bdGdU3RTbfGhaKDcWS6JRQOVdIeBdFfw/joT3/4o:S2s2dGdixbfFKZRQOVWe1fw7oLX

Score

10^/10

stormkitty xworm discovery execution persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

C2

afiffebri123-60395.portmap.io:60395

Attributes

Install_directory
%AppData%
install_file
XClient.exe
telegram
https://api.telegram.org/bot7486317179:AAEtNWUGA1lxUf1Hicy6OwAGMFiLZF8KznM/sendMessage?chat_id=1253599693

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/1992-1-0x00000000001D0000-0x00000000001FA000-memory.dmp	family_xworm
behavioral1/files/0x002000000002ab73-60.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/1992-68-0x000000001B130000-0x000000001B250000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
336	powershell.exe
2256	powershell.exe
2860	powershell.exe
5436	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
668	XClient.exe
5776	XClient.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-1-5-21-4018527317-446799424-2810249686-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.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.

flow	ioc
1	ip-api.com

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
3868	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2860	powershell.exe
2860	powershell.exe
5436	powershell.exe
5436	powershell.exe
336	powershell.exe
336	powershell.exe
2256	powershell.exe
2256	powershell.exe
1992	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1992	XClient.exe
Token: SeDebugPrivilege	2860	powershell.exe
Token: SeDebugPrivilege	5436	powershell.exe
Token: SeDebugPrivilege	336	powershell.exe
Token: SeDebugPrivilege	2256	powershell.exe
Token: SeDebugPrivilege	1992	XClient.exe
Token: SeDebugPrivilege	668	XClient.exe
Token: SeDebugPrivilege	5776	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1992	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 2860	1992	XClient.exe	78
PID 1992 wrote to memory of 2860	1992	XClient.exe	78
PID 1992 wrote to memory of 5436	1992	XClient.exe	80
PID 1992 wrote to memory of 5436	1992	XClient.exe	80
PID 1992 wrote to memory of 336	1992	XClient.exe	82
PID 1992 wrote to memory of 336	1992	XClient.exe	82
PID 1992 wrote to memory of 2256	1992	XClient.exe	84
PID 1992 wrote to memory of 2256	1992	XClient.exe	84
PID 1992 wrote to memory of 3868	1992	XClient.exe	86
PID 1992 wrote to memory of 3868	1992	XClient.exe	86

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- 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:1992
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2860
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5436
- 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\Roaming\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:336
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2256
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3868

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:668

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5776

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

1

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\XClient.exe.log

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

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

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
2e8eb51096d6f6781456fef7df731d97

SHA1
ec2aaf851a618fb43c3d040a13a71997c25bda43

SHA256
96bfd9dd5883329927fe8c08b8956355a1a6ceb30ceeb5d4252b346df32bc864

SHA512
0a73dc9a49f92d9dd556c2ca2e36761890b3538f355ee1f013e7cf648d8c4d065f28046cd4a167db3dea304d1fbcbcea68d11ce6e12a3f20f8b6c018a60422d2

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

Filesize
944B

MD5
781da0576417bf414dc558e5a315e2be

SHA1
215451c1e370be595f1c389f587efeaa93108b4c

SHA256
41a5aef8b0bbeea2766f40a7bba2c78322379f167c610f7055ccb69e7db030fe

SHA512
24e283aa30a2903ebe154dad49b26067a45e46fec57549ad080d3b9ec3f272044efaaed3822d067837f5521262192f466c47195ffe7f75f8c7c5dcf3159ea737

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

Filesize
944B

MD5
21017c68eaf9461301de459f4f07e888

SHA1
41ff30fc8446508d4c3407c79e798cf6eaa5bb73

SHA256
03b321e48ff3328d9c230308914961fe110c4c7bc96c0a85a296745437bcb888

SHA512
956990c11c6c1baa3665ef7ef23ef6073e0a7fcff77a93b5e605a83ff1e60b916d80d45dafb06977aed90868a273569a865cf2c623e295b5157bfff0fb2be35d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0qyppu04.ok1.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe

Filesize
145KB

MD5
9ed864b6eaabf32d1fa70cc6b0c0c39c

SHA1
7c657049d6b5dd79d1937fb33abfd8f6d58e4a9a

SHA256
0e24f1d56bc9acda5afb857fdb2c96ee295fd9b34efab29e95eae849367bd5de

SHA512
759201eaf5f4da105badbbce6a5db8c32e2c8a05a7a09ab45fdae38bc8573b1a51f5cb3633260ceb8e33cba6917bc38b13c910d76398988a532976ef2b2eba34

Download Submit
memory/1992-58-0x000000001C910000-0x000000001C91A000-memory.dmp

Filesize
40KB

Download
memory/1992-63-0x000000001C620000-0x000000001C62A000-memory.dmp

Filesize
40KB

Download
memory/1992-68-0x000000001B130000-0x000000001B250000-memory.dmp

Filesize
1.1MB

Download
memory/1992-1-0x00000000001D0000-0x00000000001FA000-memory.dmp

Filesize
168KB

Download
memory/1992-65-0x0000000002180000-0x000000000218A000-memory.dmp

Filesize
40KB

Download
memory/1992-64-0x000000001C730000-0x000000001C73A000-memory.dmp

Filesize
40KB

Download
memory/1992-2-0x00007FFBBC780000-0x00007FFBBD242000-memory.dmp

Filesize
10.8MB

Download
memory/1992-0-0x00007FFBBC783000-0x00007FFBBC785000-memory.dmp

Filesize
8KB

Download
memory/1992-55-0x00007FFBBC780000-0x00007FFBBD242000-memory.dmp

Filesize
10.8MB

Download
memory/1992-56-0x000000001B040000-0x000000001B04C000-memory.dmp

Filesize
48KB

Download
memory/1992-57-0x000000001C610000-0x000000001C61A000-memory.dmp

Filesize
40KB

Download
memory/2860-11-0x000002026E170000-0x000002026E192000-memory.dmp

Filesize
136KB

Download
memory/2860-12-0x00007FFBBC780000-0x00007FFBBD242000-memory.dmp

Filesize
10.8MB

Download
memory/2860-15-0x00007FFBBC780000-0x00007FFBBD242000-memory.dmp

Filesize
10.8MB

Download
memory/2860-13-0x00007FFBBC780000-0x00007FFBBD242000-memory.dmp

Filesize
10.8MB

Download
memory/2860-14-0x00007FFBBC780000-0x00007FFBBD242000-memory.dmp

Filesize
10.8MB

Download
memory/2860-19-0x00007FFBBC780000-0x00007FFBBD242000-memory.dmp

Filesize
10.8MB

Download
memory/2860-16-0x00007FFBBC780000-0x00007FFBBD242000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads