stormkitty | b47e2ebd5df87d6fe2b540f94aa188eae6f45f0df94815c35d4f2a9e4db08f38

General

Target

CookieScript.exe
Size

70KB
MD5

db991a8bbad955983d68121fea62aa1a
SHA1

d103e2def0fb83b53edc95e81eb4e7e7a33f46f9
SHA256

b47e2ebd5df87d6fe2b540f94aa188eae6f45f0df94815c35d4f2a9e4db08f38
SHA512

f2a60a290c5079e559d8e1d3210822a1a8f01d6d5c3bea5863038fe489b44d9e368d7adb5646e4c9004a5d8500ca1de95240340336fb4635c4bf96feb004a00b
SSDEEP

1536:sQJ+vIofChluDAR7D9Iqtd+b3XhWkODXfzHbiOeUI:s1VKhl4A19Xf+b3XhEreOeZ

Score

10^/10

stormkitty xworm discovery persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

C2

letter-diamonds.gl.at.ply.gg:59777

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2868-1-0x0000000000030000-0x0000000000048000-memory.dmp	family_xworm
behavioral1/files/0x0012000000016d3f-10.dat	family_xworm
behavioral1/memory/2548-12-0x0000000001020000-0x0000000001038000-memory.dmp	family_xworm
behavioral1/memory/1964-30-0x0000000000040000-0x0000000000058000-memory.dmp	family_xworm
behavioral1/memory/888-33-0x0000000001370000-0x0000000001388000-memory.dmp	family_xworm

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

StormKitty payload 1 IoCs

resource	yara_rule
behavioral1/memory/2868-34-0x000000001B3B0000-0x000000001B4D0000-memory.dmp	family_stormkitty

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

Drops startup file 2 IoCs

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

Executes dropped EXE 4 IoCs

pid	Process
2548	XClient.exe
1964	XClient.exe
888	XClient.exe
1348	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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	CookieScript.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
2852	schtasks.exe

Suspicious behavior: EnumeratesProcesses 46 IoCs

pid	Process
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe
2868	CookieScript.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2868	CookieScript.exe
Token: SeDebugPrivilege	2548	XClient.exe
Token: 33	2224	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	2224	AUDIODG.EXE
Token: 33	2224	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	2224	AUDIODG.EXE
Token: SeDebugPrivilege	1964	XClient.exe
Token: SeDebugPrivilege	888	XClient.exe
Token: SeDebugPrivilege	1348	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2868	CookieScript.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2868 wrote to memory of 2852	2868	CookieScript.exe	30
PID 2868 wrote to memory of 2852	2868	CookieScript.exe	30
PID 2868 wrote to memory of 2852	2868	CookieScript.exe	30
PID 2168 wrote to memory of 2548	2168	taskeng.exe	34
PID 2168 wrote to memory of 2548	2168	taskeng.exe	34
PID 2168 wrote to memory of 2548	2168	taskeng.exe	34
PID 2168 wrote to memory of 1964	2168	taskeng.exe	38
PID 2168 wrote to memory of 1964	2168	taskeng.exe	38
PID 2168 wrote to memory of 1964	2168	taskeng.exe	38
PID 2168 wrote to memory of 1348	2168	taskeng.exe	40
PID 2168 wrote to memory of 1348	2168	taskeng.exe	40
PID 2168 wrote to memory of 1348	2168	taskeng.exe	40

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\CookieScript.exe
"C:\Users\Admin\AppData\Local\Temp\CookieScript.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:2868
- 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:2852

C:\Windows\system32\taskeng.exe
taskeng.exe {143A4E06-F59B-4B44-9C54-8B85D49FD169} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2548
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1964
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1348

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x53c
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2224

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:888

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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\Roaming\XClient.exe

Filesize
70KB

MD5
db991a8bbad955983d68121fea62aa1a

SHA1
d103e2def0fb83b53edc95e81eb4e7e7a33f46f9

SHA256
b47e2ebd5df87d6fe2b540f94aa188eae6f45f0df94815c35d4f2a9e4db08f38

SHA512
f2a60a290c5079e559d8e1d3210822a1a8f01d6d5c3bea5863038fe489b44d9e368d7adb5646e4c9004a5d8500ca1de95240340336fb4635c4bf96feb004a00b

Download Submit
memory/888-33-0x0000000001370000-0x0000000001388000-memory.dmp

Filesize
96KB

Download
memory/1964-30-0x0000000000040000-0x0000000000058000-memory.dmp

Filesize
96KB

Download
memory/2548-12-0x0000000001020000-0x0000000001038000-memory.dmp

Filesize
96KB

Download
memory/2868-0-0x000007FEF5A53000-0x000007FEF5A54000-memory.dmp

Filesize
4KB

Download
memory/2868-1-0x0000000000030000-0x0000000000048000-memory.dmp

Filesize
96KB

Download
memory/2868-6-0x000007FEF5A50000-0x000007FEF643C000-memory.dmp

Filesize
9.9MB

Download
memory/2868-7-0x000007FEF5A53000-0x000007FEF5A54000-memory.dmp

Filesize
4KB

Download
memory/2868-8-0x000007FEF5A50000-0x000007FEF643C000-memory.dmp

Filesize
9.9MB

Download
memory/2868-13-0x0000000002140000-0x000000000214C000-memory.dmp

Filesize
48KB

Download
memory/2868-31-0x000000001B150000-0x000000001B1DE000-memory.dmp

Filesize
568KB

Download
memory/2868-34-0x000000001B3B0000-0x000000001B4D0000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads