588521f0eea9bce89e593fd591ccab3435353753c4921b0fa6fbd290763a337c

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
28-04-2024 01:26

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General

Target

2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe
Size

71KB
MD5

1efce430c2b21deb3fe238459f07f116
SHA1

4195b928cd9b2e79bb13efef4285b978afa0767b
SHA256

588521f0eea9bce89e593fd591ccab3435353753c4921b0fa6fbd290763a337c
SHA512

dbf3eeb26a20116670b27a469a4938f5f9fa4853b507ce5c42d8995c6353bc04d40b732fa87eaf1c6289d918605a16bb85371991aa2cef0ee696abab6b2f97b1
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTy:ZRpAyazIliazTy

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2388 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
2388	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_1efce430c2b21deb3fe238459f07f116_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_1efce430c2b21deb3fe238459f07f116_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_1efce430c2b21deb3fe238459f07f116_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2208 2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe
Token: SeDebugPrivilege 2388 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2208	2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe
Token: SeDebugPrivilege	2388	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe

description	pid	process	target process
PID 2208 wrote to memory of 2388	2208	2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe	CTS.exe
PID 2208 wrote to memory of 2388	2208	2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe	CTS.exe
PID 2208 wrote to memory of 2388	2208	2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe	CTS.exe
PID 2208 wrote to memory of 2388	2208	2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2208

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:2388

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\Temp\lQZnQH2x2z51ufg.exe

Filesize
71KB

MD5
ee8a83fd78524b1b7a4b8bd885b4bdde

SHA1
7431902058fdcec07610574be4fbae84974a7065

SHA256
c18e35e7ebda61290f2f739ce338fbc09a761dc0a60e573555cc20d615a74243

SHA512
134700f24e7229b5608ead3513bd09570441746b4335e6af5bb55af9c366c8d71e63b5c641f80479eaf4aadb95b3deaadcdec9196e4330f5b682fe320479bc77

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit