c74a6001e3450355a643b5350475436596b7e09577ef87a875b5c3e96f970985

Analysis

max time kernel
129s
max time network
100s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 11:41

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General

Target

2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exe
Size

71KB
MD5

5d21d3109cf90f7d18935f3d47c28d6c
SHA1

8614d3f6fa286a014819b0d78c56761960ed53c4
SHA256

c74a6001e3450355a643b5350475436596b7e09577ef87a875b5c3e96f970985
SHA512

e6c2b4a1186b6dd7b74f7e422548a7fc619c537c58dffae2c9b12b392eea830e4f5897aacb629374c49d026c38ff3aa39f6334138573dda60b0294d5da98abf2
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTl:ZRpAyazIliazTl

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3712 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
3712	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_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:

2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 5044 2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exe
Token: SeDebugPrivilege 3712 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	5044	2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exe
Token: SeDebugPrivilege	3712	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exe

description	pid	process	target process
PID 5044 wrote to memory of 3712	5044	2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exe	CTS.exe
PID 5044 wrote to memory of 3712	5044	2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exe	CTS.exe
PID 5044 wrote to memory of 3712	5044	2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_5d21d3109cf90f7d18935f3d47c28d6c_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5044

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:3712

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
01b2f6cba49eb3f2013954cd9768abf1

SHA1
88607f222fbc6e821866ff2cd9a982c2451d6a6b

SHA256
a506996a7971f90f498c9d7404db3c53cb646f4e8e10c4bce2f244d71aa19302

SHA512
928d29a220609dddb5f6aee37b129bafdcaa300b91a533d2c9fc3dc56b67701104b56f55695b326d55c5d4b30cefa5eae9b1f40d9d27c379cde4279982d54080

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C:\Users\Admin\AppData\Local\Temp\qjU23eaXOYwETD8.exe
Filesize
71KB

MD5
c08611b95916b8ad4b920a41e6c82e06

SHA1
f73358db404adb9154dd645f647735db57d8ca9e

SHA256
b8369bca25fcf3a89a0cd10a993fbb4e10c237e2badf12fbaa751862053229f5

SHA512
18147533f53fab12a59da9a66850458547cb3c53da0176cbe2c38bf4913187f0e141a4bd0dc0e256b69bedf45214c06a5653fba01a5c6dd34df3cf13f861cecb

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit