4a71ac5dcead7769bfbb7cb2e8591380f55509aec570463caba3db174f1fb44c

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 03:27

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General

Target

2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe
Size

71KB
MD5

1e1e811a22a8d2de12f347ae8df4199b
SHA1

31463572231e85500b00d9247c8e27c8da4f4599
SHA256

4a71ac5dcead7769bfbb7cb2e8591380f55509aec570463caba3db174f1fb44c
SHA512

838f0585919dfcd804396671993b33c0b8f07763973d5124c87d46fc912474320298d9cf0b300de14785c551582f94ab3b74058d51803d94d34ff76edf3ae6e6
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT7:ZhpAyazIlyazT7

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4928 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
4928	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

CTS.exe2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe

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"	2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

CTS.exe2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe

description ioc process

File created C:\Windows\CTS.exe CTS.exe
File created C:\Windows\CTS.exe 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4732 2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe
Token: SeDebugPrivilege 4928 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe

description	pid	process
Token: SeDebugPrivilege	4732	2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe
Token: SeDebugPrivilege	4928	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe

description	pid	process	target process
PID 4732 wrote to memory of 4928	4732	2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe	CTS.exe
PID 4732 wrote to memory of 4928	4732	2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe	CTS.exe
PID 4732 wrote to memory of 4928	4732	2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_1e1e811a22a8d2de12f347ae8df4199b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4732

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:4928

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

Replay Monitor

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Downloads

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

MD5
e951c15d614f89bffbd76a6761b80c26

SHA1
906aefabe3091d1d3dd8a22ab8fc1ebc65a7eb2c

SHA256
3a37094db8741fd1de33bd056ff2b5d94a1386dc19e42db58a8431c4372c2645

SHA512
1d14607c3e8e1d7e99346865e02a4b588d5d3b1f4d89c089f0bf1f520fdd626dac3d15b202a0d8c4f4e10bff3e5509b8950022c99d3883c7df9acc4b19e0a63c

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C:\Users\Admin\AppData\Local\Temp\9J1uZU2xTsuMmUB.exe
Filesize
71KB

MD5
3619c6792cb5a14b4c1275dd7e7cc87c

SHA1
56e36480bb4df8c8f98e002606cb66c6b349ae15

SHA256
a84ecb58284cf02e1181db486988de1836a0c34cfaf1784c05a96ea24e0af4eb

SHA512
3ed0c5262495fa01090f670122d3db572785b329244c6cca42491ef3fa1b07bf9e011e70ef5ddf9419303b638b62634cb4dea1d6f52eea916b8ca2ee9f8eef93

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit