34a825824740f4998c26f3c78744d8311ff27afcd014c69b29ccbcb84224a352

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 07:33

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General

Target

2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exe
Size

71KB
MD5

b8c0f8695d049b62169fc995b1d5b771
SHA1

7983149c20311c3c300b8b687bfee03bb03b7e38
SHA256

34a825824740f4998c26f3c78744d8311ff27afcd014c69b29ccbcb84224a352
SHA512

3936c3112d8d75b0f00ec614e28f44a36e81d178dd3849a1c121dfa3a3a4dd60012e05870857b06a4c81b2fe18dc347025ebaecc9fccd1bc2042caa75322bdfe
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTG:ZhpAyazIlyazTG

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

5080 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
5080	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-23_b8c0f8695d049b62169fc995b1d5b771_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:

2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 752 2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exe
Token: SeDebugPrivilege 5080 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	752	2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exe
Token: SeDebugPrivilege	5080	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exe

description	pid	process	target process
PID 752 wrote to memory of 5080	752	2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exe	CTS.exe
PID 752 wrote to memory of 5080	752	2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exe	CTS.exe
PID 752 wrote to memory of 5080	752	2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_b8c0f8695d049b62169fc995b1d5b771_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:752

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:5080

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
94d1e54b6e02d6260f3b428c6ce949de

SHA1
7f092ac79ebe22a78032b0d4878ea224751310c1

SHA256
11d1f391dc19dc4e1d92752c54fa4ccb745eddafd04b3baec6b68e0d4ade9424

SHA512
c247e0a7c32785f9ce58e7641d7041aa8bd04671af9e4fbac4b79006ad6d6514fcab8bb78ba9909c099a6d8612bc708270087ef33bcb8c663bc243f5e50bb91e

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C:\Users\Admin\AppData\Local\Temp\bWVQyXynCipq7NC.exe
Filesize
71KB

MD5
d9e84321a5b99a90b575143c0342fa6a

SHA1
4831d84e8deddd6748093180661ab89ff0ee0c89

SHA256
6c12fb48310a580a87a8421212eb7494f8ab2db8181358dad61a39e09031de3d

SHA512
45dcacfac8f56ab1815ba1ecdec31b54b570a3904d3728c3cf5175acd22394fe6462ea92f06f0176de26bb61f4972a873a7822370dc9b4afbb4b4233ac8e6748

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit