cd964411456dd766c814b09b2c1d7cca9f2ce82b222dd8ce9c2dacc39a0f2929

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 14:31

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General

Target

2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exe
Size

71KB
MD5

7ef373d1db140fc56f8c79bbf50fa37a
SHA1

a546498d72acb17ab21e5ec61e6d342c8b218c1b
SHA256

cd964411456dd766c814b09b2c1d7cca9f2ce82b222dd8ce9c2dacc39a0f2929
SHA512

0f0848ed34d36855b0d4070d38bd6067e646c04b793f8a25babf70a00f8cdf9c9e5a8cf32738525025d6d87db7cbad1a9a17fe3bf6ea7b7ed6a14495904ec710
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTk:ZRpAyazIliazTk

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4576 CTS.exe
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
T1552.001

pid	process
4576	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3532 2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exe
Token: SeDebugPrivilege 4576 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3532	2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exe
Token: SeDebugPrivilege	4576	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exe

description	pid	process	target process
PID 3532 wrote to memory of 4576	3532	2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exe	CTS.exe
PID 3532 wrote to memory of 4576	3532	2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exe	CTS.exe
PID 3532 wrote to memory of 4576	3532	2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_7ef373d1db140fc56f8c79bbf50fa37a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3532

C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:4576

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
6a6d1c7a38113de3ecf35e9fe53f64ea

SHA1
e9957b6a6df9fbb833364ff8373dbf0eca272bb8

SHA256
8674505fb9e77ddf2e9878d16920b2a04a45df2af278374068cbd53806b7b333

SHA512
1ae220106c60988d3bb2dc2620bdf63e21e800f40fbb550930d708ef773e7b0d6176fee178787168e8d9e3378298fecf121b07a5245fb8b71760f545cec748a6

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C:\Users\Admin\AppData\Local\Temp\SadYCvL5Rd0u2Wm.exe
Filesize
71KB

MD5
80272d16e846fd5f616b6da422cd0a35

SHA1
e0c18c32be98ef72de156476b8374f6b64b8891f

SHA256
578ede851dd8e31efcc6175265218e3c2efe51de01abb8939b2f4143f842e318

SHA512
985fb5f4ef32a47abf8fe4b38dd9a6a5d265f5afb070cc4da10443b2fafbe35d789a44c7889ef055c171b8e4c9f99671aad072a6021d0637a0909cab81f544fa

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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