stormkitty | e4ce533707f9e1945dffa512023c4c9d4b9343a6e6218844bf8fac3e957b9260

Analysis

max time kernel
52s
max time network
56s
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/stub4.5.1.exe
Size

251KB
MD5

7eea56ea4822ec3da3e86362c32e9304
SHA1

ab8a0d7fd81bb61a63c8caeb52081da2fb3e5709
SHA256

3e383968fbdd567bb56c293837fd2965615246f40b95876a0ff954b06b34b40c
SHA512

61bd378e682519bbfc8dd33fb83865fb9a0e36fb9b1b086593a619992fd6480791d51e4a256f67a31394c6a67db1a5a2e8ee16c3b983c4734288834f9d3a3b57
SSDEEP

6144:gpksnd7L4+m9bQfDFcSEuNYnMuBAnLzuyvwWoSF:g2snJ51FEuNYB8z1wWo4

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
behavioral20/memory/2756-133-0x0000022ABBFE0000-0x0000022ABC024000-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:

stub4.5.1.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	stub4.5.1.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

4632 timeout.exe
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

4448 taskkill.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

stub4.5.1.exetaskkill.exe

description pid process

Token: SeDebugPrivilege 2756 stub4.5.1.exe
Token: SeDebugPrivilege 4448 taskkill.exe

pid	process
4632	timeout.exe

pid	process
4448	taskkill.exe

description	pid	process
Token: SeDebugPrivilege	2756	stub4.5.1.exe
Token: SeDebugPrivilege	4448	taskkill.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

stub4.5.1.execmd.exe

description	pid	process	target process
PID 2756 wrote to memory of 1812	2756	stub4.5.1.exe	cmd.exe
PID 2756 wrote to memory of 1812	2756	stub4.5.1.exe	cmd.exe
PID 1812 wrote to memory of 3736	1812	cmd.exe	chcp.com
PID 1812 wrote to memory of 3736	1812	cmd.exe	chcp.com
PID 1812 wrote to memory of 4448	1812	cmd.exe	taskkill.exe
PID 1812 wrote to memory of 4448	1812	cmd.exe	taskkill.exe
PID 1812 wrote to memory of 4632	1812	cmd.exe	timeout.exe
PID 1812 wrote to memory of 4632	1812	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\stub\stub4.5.1.exe
"C:\Users\Admin\AppData\Local\Temp\stub\stub4.5.1.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2756
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpC73D.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmpC73D.tmp.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1812
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:3736
- - C:\Windows\system32\taskkill.exe
    TaskKill /F /IM 2756
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4448
- - C:\Windows\system32\timeout.exe
    Timeout /T 2 /Nobreak
    3⤵
    - Delays execution with timeout.exe
    PID:4632

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC73D.tmp.bat

Filesize
121B

MD5
537e78fc78e60c75dc5c29523ba9bcc4

SHA1
ca5fead3a59754e9db49c74ec1450f7972a04ec6

SHA256
6eb8941b5ccdc7f80936bd0789c4f2d938e2c17c5f1b322e982c660a31e75685

SHA512
1cbbfbeeca9d647d1d06b000e7ec74b6eab7943402c8da2d16c3164374c7cba5a0c472e71b008d727d00ab0103cf2b02c73d487ed316feb7e33a82c6c7bd7323

Download Submit
memory/2756-133-0x0000022ABBFE0000-0x0000022ABC024000-memory.dmp

Filesize
272KB

Download
memory/2756-135-0x0000022AD72D0000-0x0000022AD72E0000-memory.dmp

Filesize
64KB

Download