stormkitty | 89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4

General

Target

89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe
Size

743KB
MD5

b9c45a591e76542c29df77cd6d02daea
SHA1

7ee76c8ab9c1362e8c8af7da4b822a14f05e1bf1
SHA256

89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4
SHA512

a9656322806765e2be3f5b6174d2ca4458017c1ac341658ff777e802d3cae1c953969a21993eb7ac21720b5745dc162b98119530d844138934051a5c783c8f62
SSDEEP

12288:e8eejGIgzgwtqzsXCzJnBdyPRUF4umqpWGW57M:R5khSzRSA8VBM

Score

10^/10

stormkitty collection discovery spyware 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/2808-134-0x0000000000400000-0x0000000000456000-memory.dmp	family_stormkitty

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops desktop.ini file(s) 5 IoCs

Processes:

RegAsm.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Local\IYMUGYHL\FileGrabber\Pictures\desktop.ini	RegAsm.exe
File created	C:\Users\Admin\AppData\Local\IYMUGYHL\FileGrabber\Desktop\desktop.ini	RegAsm.exe
File opened for modification	C:\Users\Admin\AppData\Local\IYMUGYHL\FileGrabber\Desktop\desktop.ini	RegAsm.exe
File created	C:\Users\Admin\AppData\Local\IYMUGYHL\FileGrabber\Documents\desktop.ini	RegAsm.exe
File created	C:\Users\Admin\AppData\Local\IYMUGYHL\FileGrabber\Downloads\desktop.ini	RegAsm.exe

Looks up external IP address via web service 5 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

37 api.ipify.org
38 ip-api.com
10 freegeoip.app
11 freegeoip.app
36 api.ipify.org

flow	ioc
37	api.ipify.org
38	ip-api.com
10	freegeoip.app
11	freegeoip.app
36	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

Processes:

89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe

description	pid	process	target process
PID 4880 set thread context of 2808	4880	89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe	RegAsm.exe

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:

RegAsm.exe

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

Suspicious behavior: EnumeratesProcesses 26 IoCs

Processes:

RegAsm.exe

pid	process
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe
2808	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegAsm.exe

description pid process

Token: SeDebugPrivilege 2808 RegAsm.exe

description	pid	process
Token: SeDebugPrivilege	2808	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe

description	pid	process	target process
PID 4880 wrote to memory of 2808	4880	89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe	RegAsm.exe
PID 4880 wrote to memory of 2808	4880	89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe	RegAsm.exe
PID 4880 wrote to memory of 2808	4880	89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe	RegAsm.exe
PID 4880 wrote to memory of 2808	4880	89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe	RegAsm.exe
PID 4880 wrote to memory of 2808	4880	89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe	RegAsm.exe
PID 4880 wrote to memory of 2808	4880	89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe	RegAsm.exe
PID 4880 wrote to memory of 2808	4880	89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe	RegAsm.exe
PID 4880 wrote to memory of 2808	4880	89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe	RegAsm.exe

outlook_office_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe
"C:\Users\Admin\AppData\Local\Temp\89bcd9a2a0e9ff0b086bf9c973a3ef07f41d992793f77f359b1a3fce08c18ad4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4880

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Drops desktop.ini file(s)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:2808

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

memory/2808-133-0x0000000000000000-mapping.dmp

Download
memory/2808-134-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/2808-135-0x00000000061B0000-0x0000000006242000-memory.dmp

Filesize
584KB

Download
memory/2808-136-0x0000000006800000-0x0000000006DA4000-memory.dmp

Filesize
5.6MB

Download
memory/2808-137-0x00000000066A0000-0x0000000006706000-memory.dmp

Filesize
408KB

Download
memory/4880-132-0x0000000000580000-0x0000000000640000-memory.dmp

Filesize
768KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads