25ebc88987e855138fef4e90f30feb24c2c54a7c34b838e9fec9651c2a10c8cb

Analysis

max time kernel
149s
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
28-04-2024 10:48

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General

Target

2024-04-28_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exe
Size

71KB
MD5

1d387e3bae73a7c9917878a3c8371d99
SHA1

b31e212be120efbbde95c473b9b79e26ca7db046
SHA256

25ebc88987e855138fef4e90f30feb24c2c54a7c34b838e9fec9651c2a10c8cb
SHA512

a938af16bfa6e7ec696b46f0319e37fe3090384187bf8ba3815c285f9a90e0a43a560247e147a165ef07e63310c36d333f39ee86ae237aa8775421367c1a2d50
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

3380 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
3380	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_1d387e3bae73a7c9917878a3c8371d99_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_1d387e3bae73a7c9917878a3c8371d99_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_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3660 2024-04-28_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exe
Token: SeDebugPrivilege 3380 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3660	2024-04-28_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exe
Token: SeDebugPrivilege	3380	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exe

description	pid	process	target process
PID 3660 wrote to memory of 3380	3660	2024-04-28_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exe	CTS.exe
PID 3660 wrote to memory of 3380	3660	2024-04-28_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exe	CTS.exe
PID 3660 wrote to memory of 3380	3660	2024-04-28_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_1d387e3bae73a7c9917878a3c8371d99_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3660

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:3380

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
c80777cf4b597c2bab495101cddd8d5f

SHA1
fec85f7e04e697d590e297be13cc49d271cf0400

SHA256
d68bd787c27fbb209f507713561af0a579339eea20e95a30b586027de87c1b57

SHA512
12873418b2b2429da3a86c63a485599c4c07b382ed1ef3593d21dd2a146eb2890aae3d0b4517e466f32b3be48b7869a5f6a7d12e5fc46f731e1eab7744240423

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C:\Users\Admin\AppData\Local\Temp\u5drfE3ZTuGXkqk.exe

Filesize
71KB

MD5
88592eb251a05bf778bbc36ee96ecaca

SHA1
b9079e903548d21db1d5d8c9c48a1524e76a6740

SHA256
9de2a3cb172646b96efac6c2b435a23c5db5b792c71e7d53876b04552dff7296

SHA512
df0ee4cba80b5ceed0391194f30082f6edbb5fece34dcdf791934ffbaae28a92262ba0b7e66f4cc52495bb032352d7c2c0bae987037cee98fd8ec8aa5308f653

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit