881f5b88ff2f6ed73adc11e43fb56fd11c6bb492944d8f970b8b8d09575ba8db

Analysis

max time kernel
66s
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 03:49

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General

Target

2024-04-28_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exe
Size

71KB
MD5

ba3674fcc2fc0b03f9e9d26070bb599a
SHA1

0675be34fbbbd3e1227fb24da37466beaca50ad9
SHA256

881f5b88ff2f6ed73adc11e43fb56fd11c6bb492944d8f970b8b8d09575ba8db
SHA512

e447ecb100b9c05ac8486c26bd826ade208a4bf02f32c78f9e99a62eacbd68fac1f86942adcf4546ffb869eae80fb16cc9db916abce9287da2cba6d961818c90
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT9:ZhpAyazIlyazT9

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

60 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
60	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_ba3674fcc2fc0b03f9e9d26070bb599a_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_ba3674fcc2fc0b03f9e9d26070bb599a_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_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1820 2024-04-28_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exe
Token: SeDebugPrivilege 60 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1820	2024-04-28_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exe
Token: SeDebugPrivilege	60	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exe

description	pid	process	target process
PID 1820 wrote to memory of 60	1820	2024-04-28_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exe	CTS.exe
PID 1820 wrote to memory of 60	1820	2024-04-28_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exe	CTS.exe
PID 1820 wrote to memory of 60	1820	2024-04-28_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_ba3674fcc2fc0b03f9e9d26070bb599a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1820

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:60

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

Replay Monitor

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Downloads

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

MD5
348e62b0de3085db1c8126e9d30d8d7a

SHA1
948fba397b827f82bd51dc7575e09d1ca0b4c507

SHA256
f346890f92555492e3a5094e72b12d0574b17aaf5afad436dbb9bfc0b180325c

SHA512
47e23473bcdaeb53bbd73a20780075a513c20fcd4877fe57fdea405f2c26ac57c5a4d481247e5b7d4c9fe74362038364bf333e8cac73f8ed4fc4880c9b83e9b0

Download Submit
C:\Users\Admin\AppData\Local\Temp\Z1ILzp2QDaRQCb0.exe
Filesize
71KB

MD5
4c56657e751b3664deb630886932da5c

SHA1
53ef429fec8848ccbdd12c2ba0e03055f44b4b2c

SHA256
a7cfaf850615a019b8bc312fa313ac1e2751b8a26e9c923edd5ad630a9540520

SHA512
85e2e3bf04479c436972b244777706edf88aa4ccc7d66f566bb8e03169dca915b3286898dc8ecfc94a776803e7cef0c732272a28863c553c2737601a0efa6dbd

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

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit