ef2d13b1e43fdf1acd0237e797b43a88aef668c3160e054fb92cd8ae1dfb87ab

Analysis

max time kernel
55s
max time network
52s
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 10:03

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exe
Size

73KB
MD5

4bc9ffb3e40815e89c46e511821a207b
SHA1

7dba7735b3a9b3534187975c4fa9cb87d1f11412
SHA256

ef2d13b1e43fdf1acd0237e797b43a88aef668c3160e054fb92cd8ae1dfb87ab
SHA512

14ecd188c3d9d262fd04c5d18e47a40c73d7d8f96735bc1ab7da3cda0bb260924f1a0262753a214fb0532460912a96f59c1858f2bef217625bae32f035080ae2
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTWB:ZRpAyazIliazTm

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

5100 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
5100	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_4bc9ffb3e40815e89c46e511821a207b_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_4bc9ffb3e40815e89c46e511821a207b_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:

2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3200 2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exe
Token: SeDebugPrivilege 5100 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3200	2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exe
Token: SeDebugPrivilege	5100	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exe

description	pid	process	target process
PID 3200 wrote to memory of 5100	3200	2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exe	CTS.exe
PID 3200 wrote to memory of 5100	3200	2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exe	CTS.exe
PID 3200 wrote to memory of 5100	3200	2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_4bc9ffb3e40815e89c46e511821a207b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3200

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:5100

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
21bc5f9daec91b92e69d9e07a7d21a9f

SHA1
ed397bb36827a20894122932220a9f8629ff1004

SHA256
d9e11188927cb0e2a6c9f733419d542c1a7745c33784a5494f1a905db2ee450e

SHA512
c60288dba7cee06f22ead794351900388dd4d8ed48d72dd02f7ac335649cfe6e6c136a063446cf21873e52f79c940d1634bee8aae573a75ed4bc4569e4c595fe

Download Submit
C:\Users\Admin\AppData\Local\Temp\yrtiWhvyHT8IY31.exe
Filesize
73KB

MD5
77350282799fc1150e5b4a3d6e9de218

SHA1
a3f79caca8c80113a65a94de61475f1e0ce3b26b

SHA256
06d4939cebb0cfec3ab6f98fbd7496473ebe161fe1901c5c5de7b1d4474e69a3

SHA512
93cdad75d62ced8169d2a660d13ea04a0de8efca3798045c0f32910118ea64561de0a68a1c33aa2a6e5202a8bd95ae6e6171164f9889b34922a4417aced85cc3

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads