f3d44069bf0ae8113082dee57c4028dd3a0d5b352936a2c5e242cdafbe582378

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19/11/2024, 19:40

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General

Target

2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe
Size

4.9MB
MD5

c398beb81ac2e36aacd7842c7e38a87e
SHA1

dff19de837280957c6dfd6741ca932877ed83436
SHA256

f3d44069bf0ae8113082dee57c4028dd3a0d5b352936a2c5e242cdafbe582378
SHA512

1f4698ba386c8274e51ad2f6e2af151ba440db0172e091286eeadb06f46a21cfabd8450cec18ec0a33a768dff5139ad0cdb5187906317b73ed67523381fd2187
SSDEEP

49152:qH22XshK+YmrPwVwyBdlhMC7ahrAZmJX+N9hQXpKskuxy52tm6/5sQnVPcvKwoKm:+sFcTl2C7zZK6Lts5KKjJ1

Score

7^/10

spyware stealer

Malware Config

Signatures

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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.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

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\yandex_browser_installer.log	2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe
File opened for modification	C:\Program Files\yandex_browser_installer.log	2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3224 wrote to memory of 2164	3224	2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe	82
PID 3224 wrote to memory of 2164	3224	2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe	82
PID 2164 wrote to memory of 3216	2164	2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe	84
PID 2164 wrote to memory of 3216	2164	2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe
"C:\Users\Admin\AppData\Local\Temp\2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:3224
- C:\Users\Admin\AppData\Local\Temp\2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe
  "C:\Users\Admin\AppData\Local\Temp\2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe" --verbose-logging --run-as-admin --target-path="C:\Users\Admin\AppData\Local\Yandex\YandexBrowser\Application" --child-setup-process --restart-as-admin-time=484180568
  2⤵
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2164
- - C:\Users\Admin\AppData\Local\Temp\2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe
    C:\Users\Admin\AppData\Local\Temp\2024-11-19_c398beb81ac2e36aacd7842c7e38a87e_cobalt-strike_ryuk.exe --type=crashpad-handler /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Yandex\YandexBrowser\User Data\Crashpad" --url=https://crash-reports.browser.yandex.net/submit --annotation=channel=beta --annotation=machine_id=488dca4c15f9a1d330ad312b391a804e --annotation=main_process_pid=2164 --annotation=plat=Win64 --annotation=prod=Yandex --annotation=session_logout=False --annotation=ver=24.10.4.462 --initial-client-data=0x28c,0x290,0x294,0x268,0x298,0x7ff6fcb754b8,0x7ff6fcb754c4,0x7ff6fcb754d0
    3⤵
    PID:3216

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files\yandex_browser_installer.log

Filesize
2KB

MD5
8ae2e32fa501bfeef148d739f700762b

SHA1
9ddf9fbd1b228a3faf2a56953ae5e2533eb33824

SHA256
fad9d15ae98ea5c7ca411381049697b028b904e13ee41162d17118f5e9424639

SHA512
7a7e947abe1e8874358e5f0793a48dc4d1907e430e46d7c5ce2780ef0621763a28d3b55607ec0936486b661d595adaf29ba6dde5de2197c4245bc0bc2867da86

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