fbb15eccc4603d3ebce8c19e24f46bbcb39d197ab4a08f80f6ad30c558e564b7

Analysis

max time kernel
129s
max time network
98s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
07-06-2024 08:24

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General

Target

2024-06-07_6ecdcbf8f1855426d579502dcd04dad6_bkransomware.exe
Size

74KB
MD5

6ecdcbf8f1855426d579502dcd04dad6
SHA1

dd3e172f612dba243ca1a73b28ef4572dd130deb
SHA256

fbb15eccc4603d3ebce8c19e24f46bbcb39d197ab4a08f80f6ad30c558e564b7
SHA512

c5050f59625a93e4ad65aea4a6173ac4c62a19c1128a4ff9f821c32d71b9f49de317f2ffcba141ab3149fa0293709a954ebe6f61518820b6a8132ff4409fb704
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTeD:ZRpAyazIliazTq

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4840	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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-06-07_6ecdcbf8f1855426d579502dcd04dad6_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

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-06-07_6ecdcbf8f1855426d579502dcd04dad6_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4928	2024-06-07_6ecdcbf8f1855426d579502dcd04dad6_bkransomware.exe
Token: SeDebugPrivilege	4840	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4928 wrote to memory of 4840	4928	2024-06-07_6ecdcbf8f1855426d579502dcd04dad6_bkransomware.exe	83
PID 4928 wrote to memory of 4840	4928	2024-06-07_6ecdcbf8f1855426d579502dcd04dad6_bkransomware.exe	83
PID 4928 wrote to memory of 4840	4928	2024-06-07_6ecdcbf8f1855426d579502dcd04dad6_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-07_6ecdcbf8f1855426d579502dcd04dad6_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-07_6ecdcbf8f1855426d579502dcd04dad6_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4928
- 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:4840

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\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
392KB

MD5
e70c45a5ddcdb3a68f251307544957ee

SHA1
067791818d89a3cf69eeb20ee84bc9e8638703f5

SHA256
ebdff59fbdab5b5f9bc67eee32cef09c45496eee973ee9787758594abd428c62

SHA512
5648c7a1fe291e195ad13e391373f7770edf571606d7b2579e454b7f48e7ee0868fe39530e05b79e79b9426a574aa4929821390f8c1509f52818483049fb10e1

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads