05b9cc14544709562f1750664e41aca9e605c889626dba5f4f4d043444658763

Analysis

max time kernel
121s
max time network
121s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
28-04-2024 03:24

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General

Target

2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe
Size

71KB
MD5

0f594581f48775ebc8c44762fd84289f
SHA1

43c19c46f3af21857a93ce47893043a1d186f344
SHA256

05b9cc14544709562f1750664e41aca9e605c889626dba5f4f4d043444658763
SHA512

a0fb976087bd7a9b8efed4ce1fb34b8e853a07b27f01d7b124efc39bae8aa931eee7cfd1871b8134916fef32cc31ba237f3cf5a4a53ef93fd6d363b3d6793c94
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTc:ZRpAyazIliazTc

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1624 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
1624	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_0f594581f48775ebc8c44762fd84289f_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:

2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2888 2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe
Token: SeDebugPrivilege 1624 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2888	2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe
Token: SeDebugPrivilege	1624	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe

description	pid	process	target process
PID 2888 wrote to memory of 1624	2888	2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe	CTS.exe
PID 2888 wrote to memory of 1624	2888	2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe	CTS.exe
PID 2888 wrote to memory of 1624	2888	2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe	CTS.exe
PID 2888 wrote to memory of 1624	2888	2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2888

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:1624

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\e8CunlvjNTf2TgK.exe
Filesize
71KB

MD5
8520a2f33e45cf606ee35cae2a163701

SHA1
63a06f8bdc163cc139b11db2321272c2297488c8

SHA256
5d87110cef248460e1d8ae1cbd5e865e86c8e3f7d345ec5a3657183cfbdcecaa

SHA512
73e5ec858d4d2cf6540ff5331e08281f1d7e5fdc96cdf6333413c3bea8d6bab0cb191ee90373483d1e0907b19ca45d284c22c68a34792cee47d4d9afb97d4d8a

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads