0e989aedabf3a7ef6efc4a359ffaf9078d5359da19f9d280a02f602004a8e839

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 23:28

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General

Target

2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exe
Size

73KB
MD5

d642e3aa397a73bf313f9fc09c7ee411
SHA1

da259059154641b8ffbc092924de9f99efc18c4e
SHA256

0e989aedabf3a7ef6efc4a359ffaf9078d5359da19f9d280a02f602004a8e839
SHA512

76485a672d69bc02ac975188bb4ea2e808bd5c14eff93cbcf2b6990add184c53e30d8ba0c9b4ce15e2a6e7516cd67c1e88c3efe5190bf0af58d89e500b5db08e
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTLDxd:ZhpAyazIlyazTfxd

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2800 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
2800	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_d642e3aa397a73bf313f9fc09c7ee411_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_d642e3aa397a73bf313f9fc09c7ee411_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:

CTS.exe2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exe

description ioc process

File created C:\Windows\CTS.exe CTS.exe
File created C:\Windows\CTS.exe 2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3336 2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exe
Token: SeDebugPrivilege 2800 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exe

description	pid	process
Token: SeDebugPrivilege	3336	2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exe
Token: SeDebugPrivilege	2800	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exe

description	pid	process	target process
PID 3336 wrote to memory of 2800	3336	2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exe	CTS.exe
PID 3336 wrote to memory of 2800	3336	2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exe	CTS.exe
PID 3336 wrote to memory of 2800	3336	2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_d642e3aa397a73bf313f9fc09c7ee411_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3336

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:2800

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
6bac3a2d31c33d4a200f6a0f0cd8f9a5

SHA1
a1a33e3abba357a8ea9b8ffacfaf0cffe6ea4645

SHA256
5bd947a39e90a0af0519c056d50bb98e45c43f03a7107d686df59e227a71c2bd

SHA512
bdc61788c27e328d53e6649bbf329de2c3de1f1594b65fe95fdd4796ddc99a43385bb7760ef8be0f466b8a2a77f9afcf0c7c7585e9b7609ec94c6f65873c0a39

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C:\Users\Admin\AppData\Local\Temp\aoJ9rvF1zE1jUg8.exe

Filesize
73KB

MD5
ffc3ac44dd7537f2fec366adf1146def

SHA1
697b9f686ab7dd403b5ca0a1e34f8578de1efdbe

SHA256
16329a648f74d4db6b695bf2a9821e9f127b25237d3500bf349b80adc48f6a33

SHA512
a96029a205873e5e02ee503f77f6b2be591fc3fb274fd205a2ac7b4528b75cefc98e51f4b5ec3aacfb54a35344b5bd76081eb614271c75a30beda2a0447a3d93

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C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit