6096f8b923caa302fd2f4a3c03581b4fbe2bc4788270537e5cf0d735ec6174f9

Analysis

max time kernel
119s
max time network
124s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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
1448	hgyF5NfhNWr302B.exe
1536	CTS.exe

Loads dropped DLL 2 IoCs

pid	Process
2240	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe
2240	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.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"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.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	2240	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe
Token: SeDebugPrivilege	1536	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 1448	2240	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	28
PID 2240 wrote to memory of 1448	2240	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	28
PID 2240 wrote to memory of 1448	2240	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	28
PID 2240 wrote to memory of 1448	2240	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	28
PID 2240 wrote to memory of 1536	2240	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	29
PID 2240 wrote to memory of 1536	2240	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	29
PID 2240 wrote to memory of 1536	2240	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	29
PID 2240 wrote to memory of 1536	2240	2024-05-31_b83e98f0083e2369f05f169e399f7167_bkransomware.exe	29

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⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Users\Admin\AppData\Local\Temp\hgyF5NfhNWr302B.exe
  C:\Users\Admin\AppData\Local\Temp\hgyF5NfhNWr302B.exe
  2⤵
  - Executes dropped EXE
  PID:1448
- 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:1536

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\Temp\hgyF5NfhNWr302B.exe

Filesize
135KB

MD5
fbebed3ee61274a917e6ac1075ef283a

SHA1
6fa77a6404151d8f0d8aa98e898eb653df1829a6

SHA256
3afce13a682c4c943d099167c22836ed9f57ecb95f5df0260c49a3968e8a02c2

SHA512
cf4e6d23d15031d6e5a778435baf32ef7c46b2386540545940374698100b9503ca0907b7a7f58f62fb73a204865863d442889c3b641b8adbd594ded6311295f8

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C:\Users\Admin\AppData\Local\Temp\hgyF5NfhNWr302B.exe

Filesize
64KB

MD5
e97c622b03fb2a2598bf019fbbe29f2c

SHA1
32698bd1d3a0ff6cf441770d1b2b816285068d19

SHA256
5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160

SHA512
db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d

Download Submit
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