e3f60c146bfdb653f28fcaac5481428180a7215ca9652927cb3bea86f87e4c54

Analysis

max time kernel
67s
max time network
53s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 10:04

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General

Target

2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exe
Size

71KB
MD5

5977a3760473c1d5ddd2bad932ae0d4f
SHA1

7c7dff14e625c37bef059cae8f5eae23226c1232
SHA256

e3f60c146bfdb653f28fcaac5481428180a7215ca9652927cb3bea86f87e4c54
SHA512

ad57a2c34f8b602cca2066da247443120b717e6d6208602580efa02dcdf334d46ed89af57bdd476b46fa07858125e4d3d996f9677d63779e9d9d495aaffdaabe
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTCp:ZRpAyazIliazTy

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1504 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
1504	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_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:

CTS.exe2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exe

description ioc process

File created C:\Windows\CTS.exe CTS.exe
File created C:\Windows\CTS.exe 2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4448 2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exe
Token: SeDebugPrivilege 1504 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exe

description	pid	process
Token: SeDebugPrivilege	4448	2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exe
Token: SeDebugPrivilege	1504	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exe

description	pid	process	target process
PID 4448 wrote to memory of 1504	4448	2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exe	CTS.exe
PID 4448 wrote to memory of 1504	4448	2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exe	CTS.exe
PID 4448 wrote to memory of 1504	4448	2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_5977a3760473c1d5ddd2bad932ae0d4f_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4448

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:1504

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
392KB

MD5
1347d379d08cc28e91300c0b3c0d1ccd

SHA1
024633966a56829c46fa553ac1ca720a10db9f04

SHA256
6373967cd4eb21d73eb517a92ee5e9051b4a25026c698e91489d514d4bda394b

SHA512
1bed19585586a505acd05b65e983a65ae2ece957bba746c57f4bb8b346f87ca9a6113c7cf736fee761487168cff605574634dc82567bfd7cde244286bfb9ab60

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C:\Users\Admin\AppData\Local\Temp\llQSm75Uw0n7WkT.exe
Filesize
71KB

MD5
0f3c64190600d3469698083ee4e3b3bb

SHA1
f82cac92767554fd311f51542bb0c51265dc6865

SHA256
e11937ed89f885d8da1fee625f6a3359eb75535c6b35f5b07bbf4d3f793170c7

SHA512
9ba31e409124b2a4532251cadd14d88083981dc7ce6e5b0c404ac8c3b6cb54abc9a63cd75f7b6bf4a22fcdcf68187558548374169eac6bb473af46f3d3aab971

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit