c4c77be8ff680ad6f110e7a7f6abafcb0712b391e88db1c4b0129520546255a1

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
23-05-2024 07:53

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General

Target

2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exe
Size

71KB
MD5

5f655bdaada31d9fc11f5da963bb6a31
SHA1

6a9ccec5f385d92fefca9890e166f7340c2c8e80
SHA256

c4c77be8ff680ad6f110e7a7f6abafcb0712b391e88db1c4b0129520546255a1
SHA512

82bcfb501828d7ce05ab811b3fa9c5d38aa960e4b699ae66d7129466d1adbe6d397ebae8120cf6ed3e53b02ceac213508dfb6a083e62b5ce41558f3b186cb3e2
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTs:ZRpAyazIliazTs

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3020 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
3020	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_5f655bdaada31d9fc11f5da963bb6a31_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_5f655bdaada31d9fc11f5da963bb6a31_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_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2936 2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exe
Token: SeDebugPrivilege 3020 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2936	2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exe
Token: SeDebugPrivilege	3020	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exe

description	pid	process	target process
PID 2936 wrote to memory of 3020	2936	2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exe	CTS.exe
PID 2936 wrote to memory of 3020	2936	2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exe	CTS.exe
PID 2936 wrote to memory of 3020	2936	2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exe	CTS.exe
PID 2936 wrote to memory of 3020	2936	2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_5f655bdaada31d9fc11f5da963bb6a31_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2936
- 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:3020

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\CVqL494lHSIacUS.exe

Filesize
71KB

MD5
285939bf81045f911973bb43363ef9f6

SHA1
cfa78427e2de5089b40c66ed5c12762c9163be8e

SHA256
080634c64e2050fba361e9ca1381d0f60138402cbcc034145e8606fa7b334294

SHA512
4ba405f5f6ce0c0f64731b4d6d505612d320db32486f0a749c71587eb61bd328446610a756bba7d6dbd5212c8e8a6cb1e2b49a1d49ea02e2fe0fe827d6bf9a71

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit