05b9cc14544709562f1750664e41aca9e605c889626dba5f4f4d043444658763

Analysis

max time kernel
66s
max time network
56s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28/04/2024, 03:24

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General

Target
2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe
Size 71KB
Sample240428-dx3f5afa44
SHA256 05b9cc14544709562f1750664e41aca9e605c889626dba5f4f4d043444658763
MD5 0f594581f48775ebc8c44762fd84289f
SHA1 43c19c46f3af21857a93ce47893043a1d186f344
SHA512 a0fb976087bd7a9b8efed4ce1fb34b8e853a07b27f01d7b124efc39bae8aa931eee7cfd1871b8134916fef32cc31ba237f3cf5a4a53ef93fd6d363b3d6793c94
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTc:ZRpAyazIliazTc
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4452	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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

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

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

description	pid	Process
Token: SeDebugPrivilege	1220	2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe
Token: SeDebugPrivilege	4452	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1220 wrote to memory of 4452	1220	2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe	84
PID 1220 wrote to memory of 4452	1220	2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe	84
PID 1220 wrote to memory of 4452	1220	2024-04-28_0f594581f48775ebc8c44762fd84289f_bkransomware.exe	84

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:1220
- 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:4452

Network

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

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 392KB
SHA256 8bb85465dc43736ceb579f782296f1bcb028598cbfa7c49f3fb75f9960cfbdb5
MD5 1d2b77b8f4ffb4626c01be30f3a94497
SHA1 04741b8eb776434c83e49130e9ced0d283d6f2c7
SHA512 9bc94d542bec90a92ef250259546a9585a9e59d9c2c5691645f2e4ae57f38b4e45ccde8360d217d3ab9fb3b9f35ba012d5285bf4219114e2444368ceeb3e40ca
SSDEEP 6144:xZ8az2ddEZJ5zg3A03+gQbWn19AQ1XIPK5XYg/uO4gsRW6j9qNvGu9:xC0s21MvQaTAQhQK5huLk6j9SGO
MD5 SHA1 SHA512 SSDEEP

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psE3AvdHMXfBlgQ.exe

Path C:\Users\Admin\AppData\Local\Temp\psE3AvdHMXfBlgQ.exe
Size 71KB
SHA256 9baebd8d28ff7ca3c99f02ab4a0e3ac1414b47e4ab108f6464898891d48e3af1
MD5 f49c850c88ebd549197d055fb10cad1a
SHA1 97f92cf9b9726d13fd6c45494b6cadc295669464
SHA512 8f174774598f6bdb46129af482c63262a04dc900f407c523a72d7af234a18116c60965ad2974a216a2d295e7c754a948f753f0ef21b11f502e2a734ac2962967
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTx:ZRpAyazIliazTx
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT:ZRpAyazIliazT
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads