stormkitty | e4ce533707f9e1945dffa512023c4c9d4b9343a6e6218844bf8fac3e957b9260

Analysis

max time kernel
55s
max time network
62s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
31-03-2023 05:28

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General

Target

stub/stub4.5.exe
Size

251KB
MD5

787c59882e9b7c46a800f44f6bb56a52
SHA1

92bfffef47597329479dd636d8aa0613740a7e6f
SHA256

3897171f1a25fa0d42e7658b72479e2089dbb51ad36658f2481326f4a9c13544
SHA512

282ba558ef4adf6e011233919389f5a7936b955621062fc9169eb72f83b307bdc4707fa5dec7550658ebbb097f20159e5458722c6c829840e504792ac068438e
SSDEEP

6144:tpksnd7X45m9bQf3FcSEuNYnMuBAnLzuyvwWoSF:t2snJihFEuNYB8z1wWo4

Score

10^/10

stormkitty 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
behavioral21/memory/3736-133-0x000002135A2F0000-0x000002135A334000-memory.dmp	family_stormkitty

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

Processes:

stub4.5.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	stub4.5.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

400 timeout.exe
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

2084 taskkill.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

stub4.5.exetaskkill.exe

description pid process

Token: SeDebugPrivilege 3736 stub4.5.exe
Token: SeDebugPrivilege 2084 taskkill.exe

pid	process
400	timeout.exe

pid	process
2084	taskkill.exe

description	pid	process
Token: SeDebugPrivilege	3736	stub4.5.exe
Token: SeDebugPrivilege	2084	taskkill.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

stub4.5.execmd.exe

description	pid	process	target process
PID 3736 wrote to memory of 4488	3736	stub4.5.exe	cmd.exe
PID 3736 wrote to memory of 4488	3736	stub4.5.exe	cmd.exe
PID 4488 wrote to memory of 3448	4488	cmd.exe	chcp.com
PID 4488 wrote to memory of 3448	4488	cmd.exe	chcp.com
PID 4488 wrote to memory of 2084	4488	cmd.exe	taskkill.exe
PID 4488 wrote to memory of 2084	4488	cmd.exe	taskkill.exe
PID 4488 wrote to memory of 400	4488	cmd.exe	timeout.exe
PID 4488 wrote to memory of 400	4488	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\stub\stub4.5.exe
"C:\Users\Admin\AppData\Local\Temp\stub\stub4.5.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3736

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmp74B8.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmp74B8.tmp.bat
2⤵
- Suspicious use of WriteProcessMemory
PID:4488

C:\Windows\system32\chcp.com
chcp 65001
3⤵
PID:3448

C:\Windows\system32\taskkill.exe
TaskKill /F /IM 3736
3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2084

C:\Windows\system32\timeout.exe
Timeout /T 2 /Nobreak
3⤵
- Delays execution with timeout.exe
PID:400

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp74B8.tmp.bat
Filesize
119B

MD5
5983cc5db026a789a707f72613e5d20e

SHA1
d9c1d28261c1b4f2d48acdc8b3b7f5b1da16de7a

SHA256
e7076b1cb85dafb72384bb5416daa9e11c87529a6ce7d814f77b8068e79776e1

SHA512
f495e71351c6d132efbc87a8c5a23ef3dadd077b7cc9f997c7ff8aee7091d28e1aa8a72be81949ff4481d453815bc7b5ec236e8939908c4192b8b41f7945a7eb

Download Submit
memory/3736-133-0x000002135A2F0000-0x000002135A334000-memory.dmp

Filesize
272KB

Download
memory/3736-135-0x00000213754C0000-0x00000213754D0000-memory.dmp

Filesize
64KB

Download