6096f8b923caa302fd2f4a3c03581b4fbe2bc4788270537e5cf0d735ec6174f9

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
31-05-2024 21:29

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General

Target

2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe
Size

135KB
MD5

b83e98f0083e2369f05f169e399f7167
SHA1

3bd25e38715f8cbbf33d55ab306d73c350972890
SHA256

6096f8b923caa302fd2f4a3c03581b4fbe2bc4788270537e5cf0d735ec6174f9
SHA512

6c594df53ed407566d145b04285cac60915d5fa899b9e5a8fedd9213d465f0dec8c404b6471b0be0343acfd5018eaf787697bf631ce5a3b0694e06def21d139a
SSDEEP

3072:ZRpAyazIliazT9SUoCyp0aI8hj6zLu5WBUqXz1y8XWL:xZ8azxSUo/rJ6zq5WBUqXz1yH

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3308	ywDrSt9GrOFTZjO.exe
1600	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"	2024-05-31_b83e98f0083e2369f05f169e399f7167_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	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4080	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe
Token: SeDebugPrivilege	1600	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4080 wrote to memory of 3308	4080	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	84
PID 4080 wrote to memory of 3308	4080	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	84
PID 4080 wrote to memory of 3308	4080	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	84
PID 4080 wrote to memory of 1600	4080	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	85
PID 4080 wrote to memory of 1600	4080	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	85
PID 4080 wrote to memory of 1600	4080	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4080
- C:\Users\Admin\AppData\Local\Temp\ywDrSt9GrOFTZjO.exe
  C:\Users\Admin\AppData\Local\Temp\ywDrSt9GrOFTZjO.exe
  2⤵
  - Executes dropped EXE
  PID:3308
- 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:1600

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
e7e0ada9416c4349d5dd4ee51f72e656

SHA1
56c6b8c8d27580d8a43ede835d9dd25b50a8c52a

SHA256
b76380608a57e8a083c607157824c5a2cf3f2c547f6fa6cba9fe8c76a1c2b76a

SHA512
ef4f416141563f300728b1472db8d352c66df6f5012c3c2c22de854fa0d7a27b692f8d52fba03fa85f516ba48b68856beffa0786f09b66d7761aa05803eefd53

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C:\Users\Admin\AppData\Local\Temp\ywDrSt9GrOFTZjO.exe

Filesize
64KB

MD5
e97c622b03fb2a2598bf019fbbe29f2c

SHA1
32698bd1d3a0ff6cf441770d1b2b816285068d19

SHA256
5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160

SHA512
db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d

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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

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Downloads