stormkitty | 7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d

General

Target

7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe
Size

178KB
MD5

718db92b63e8d468d2486f8222427c77
SHA1

e0d354a3159477957ff06435ecfa38bce32f1f2e
SHA256

7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d
SHA512

4f936667e6dbb0d08709ebab96829c874a9c1285d9665e23379b15047335cc3109b0aaf53e32d9df39a52ed6beecc6dc4d615c84e2add4701abd160feb1990f1
SSDEEP

3072:r/H9jF3sXqPXlXmbGQz1i8dOyucD1sM+lmsolAIrRuw+mqv9j1MWLQI:jHHsOmbrhwK+lDAA

Score

10^/10

stormkitty xworm discovery persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

C2

198.7.115.133:7772

Attributes

Install_directory
%AppData%
install_file
MSClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/2796-1-0x00000000002A0000-0x00000000002D2000-memory.dmp	family_xworm
behavioral2/files/0x000300000001e0fb-49.dat	family_xworm

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

StormKitty payload 1 IoCs

resource	yara_rule
behavioral2/memory/2796-8-0x000000001DCF0000-0x000000001DE10000-memory.dmp	family_stormkitty

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

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	7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MSClient.lnk	7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MSClient.lnk	7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe

Executes dropped EXE 2 IoCs

pid	Process
2868	MSClient.exe
5068	MSClient.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\MSClient = "C:\\Users\\Admin\\AppData\\Roaming\\MSClient.exe"	7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.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
3708	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2796	7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2796	7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2796	7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe
Token: SeDebugPrivilege	2796	7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe
Token: SeDebugPrivilege	2868	MSClient.exe
Token: SeDebugPrivilege	5068	MSClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2796	7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2796 wrote to memory of 3708	2796	7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe	89
PID 2796 wrote to memory of 3708	2796	7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe	89

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\7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe
"C:\Users\Admin\AppData\Local\Temp\7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2796
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "MSClient" /tr "C:\Users\Admin\AppData\Roaming\MSClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3708

C:\Users\Admin\AppData\Roaming\MSClient.exe
C:\Users\Admin\AppData\Roaming\MSClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2868

C:\Users\Admin\AppData\Roaming\MSClient.exe
C:\Users\Admin\AppData\Roaming\MSClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5068

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

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\MSClient.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
178KB

MD5
718db92b63e8d468d2486f8222427c77

SHA1
e0d354a3159477957ff06435ecfa38bce32f1f2e

SHA256
7d47a0ba9eeeb8fb9d25bc2c6acdc99408460d6d6b15957b487b3df724e9184d

SHA512
4f936667e6dbb0d08709ebab96829c874a9c1285d9665e23379b15047335cc3109b0aaf53e32d9df39a52ed6beecc6dc4d615c84e2add4701abd160feb1990f1

Download Submit
memory/2796-0-0x00007FFEAEFA3000-0x00007FFEAEFA5000-memory.dmp

Filesize
8KB

Download
memory/2796-1-0x00000000002A0000-0x00000000002D2000-memory.dmp

Filesize
200KB

Download
memory/2796-6-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

Filesize
10.8MB

Download
memory/2796-7-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

Filesize
10.8MB

Download
memory/2796-8-0x000000001DCF0000-0x000000001DE10000-memory.dmp

Filesize
1.1MB

Download
memory/2796-47-0x000000001DC60000-0x000000001DC82000-memory.dmp

Filesize
136KB

Download
memory/2868-51-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

Filesize
10.8MB

Download
memory/2868-52-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

Filesize
10.8MB

Download
memory/2868-54-0x00007FFEAEFA0000-0x00007FFEAFA61000-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