2b76b2fb077a6fbe227ab859739a211e71ef49caa15d6de5ce9693569565b7ec

Analysis

max time kernel
118s
max time network
124s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 02:50

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General

Target

2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe
Size

71KB
MD5

ff137592acd8b7d67b31b5be1e7e30c3
SHA1

7f48eca3784bc732ae096af820e992278070f84e
SHA256

2b76b2fb077a6fbe227ab859739a211e71ef49caa15d6de5ce9693569565b7ec
SHA512

b353ac108c79209344bfc310762d4116ce597f6f35ea2acf2ddb24f294ff0893509a1406f819878db6073ff9f6699ba753fd984fcbdfaecc34f0aac47f36ea39
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT1:ZRpAyazIliazT1

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2276 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
2276	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_ff137592acd8b7d67b31b5be1e7e30c3_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_ff137592acd8b7d67b31b5be1e7e30c3_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_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2292 2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe
Token: SeDebugPrivilege 2276 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2292	2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe
Token: SeDebugPrivilege	2276	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe

description	pid	process	target process
PID 2292 wrote to memory of 2276	2292	2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe	CTS.exe
PID 2292 wrote to memory of 2276	2292	2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe	CTS.exe
PID 2292 wrote to memory of 2276	2292	2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe	CTS.exe
PID 2292 wrote to memory of 2276	2292	2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_ff137592acd8b7d67b31b5be1e7e30c3_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2292

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:2276

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

C:\Users\Admin\AppData\Local\Temp\kHHp3TdoZ9V7ckV.exe

Filesize
71KB

MD5
4ccd868c4cf75d6a8c468281c3211805

SHA1
ebfd1c57f281730753a5663c85725a415dd36a3a

SHA256
d400c266a4cdc78eccae522bd28ec30161c61f947834062cf8ca6d0061668618

SHA512
385e22ea7266fbff96ac1c67dc80fd595ef20004c503bfd0e17b378fd0c37279da5366bc73bc465ab0c15536b44ddfc393d5227bdd3e41d82b753a16807db4df

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit