338a2419881ff32babc3e806ff0d2cf6b485eb27a9aa3deb9dedd99c5fffcbc4

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
28-04-2024 11:10

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General

Target

2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exe
Size

71KB
MD5

749479b2a0fb7eae1e1e386a6e5b2fad
SHA1

2d68947ec779a3d50528ccc93fa0519250242aa1
SHA256

338a2419881ff32babc3e806ff0d2cf6b485eb27a9aa3deb9dedd99c5fffcbc4
SHA512

a1df19e04cc1d5a3de6fa6c0924b47d963cb59dc8e373d57a7d6c5f49f8cd9a439932e9dcb235641d8613d52b1a7d7c4e22b7fb584a01b8bc84da6f304d5b46a
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTM:ZRpAyazIliazTM

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2268 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
2268	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_749479b2a0fb7eae1e1e386a6e5b2fad_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_749479b2a0fb7eae1e1e386a6e5b2fad_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_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2868 2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exe
Token: SeDebugPrivilege 2268 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2868	2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exe
Token: SeDebugPrivilege	2268	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exe

description	pid	process	target process
PID 2868 wrote to memory of 2268	2868	2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exe	CTS.exe
PID 2868 wrote to memory of 2268	2868	2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exe	CTS.exe
PID 2868 wrote to memory of 2268	2868	2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exe	CTS.exe
PID 2868 wrote to memory of 2268	2868	2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_749479b2a0fb7eae1e1e386a6e5b2fad_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2868

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:2268

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\0RXDNEGcEkYPRZc.exe

Filesize
71KB

MD5
02b021f9bdbf2a3cade32d4291f4f84a

SHA1
294327987f3971a504ce7947ce6b113058432f8d

SHA256
3d75c63eec91a234e7a2f234de5cc06c199c205fcd35d04a0201307aca1ebc56

SHA512
61660604f984f432349d7c94da4919ac94c34b65601e115a1c34380cb9b6e59d73303f6f37c32bb571c98512eff0050f7d5a761ea58f2807c901c2bd569dabcc

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit