12209fa669ba9f82600b7d248f89bab50b2e29fd965175b2bf39665bb91bcc2a

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
28-04-2024 23:24

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General

Target

2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exe
Size

71KB
MD5

665ab626fee61b7f84e20e6bc99ad96b
SHA1

214b3a2196172e6b56bef598ca03b1dc64117768
SHA256

12209fa669ba9f82600b7d248f89bab50b2e29fd965175b2bf39665bb91bcc2a
SHA512

8e1f593a94dae74adb31b8fbc7ceb201058513951ca2b9a9bf43de2017c43f33b167dc5d1dcb5c84e6fc209ea75f4637c8368c089fd7184c7717135de39a9689
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

1872 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
1872	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_665ab626fee61b7f84e20e6bc99ad96b_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_665ab626fee61b7f84e20e6bc99ad96b_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_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2084 2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exe
Token: SeDebugPrivilege 1872 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2084	2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exe
Token: SeDebugPrivilege	1872	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exe

description	pid	process	target process
PID 2084 wrote to memory of 1872	2084	2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exe	CTS.exe
PID 2084 wrote to memory of 1872	2084	2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exe	CTS.exe
PID 2084 wrote to memory of 1872	2084	2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exe	CTS.exe
PID 2084 wrote to memory of 1872	2084	2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_665ab626fee61b7f84e20e6bc99ad96b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2084

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:1872

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\HrSGym8EIaM8B1F.exe

Filesize
71KB

MD5
7d2fe50e02a62063c063f08165299a6a

SHA1
5c90d85cb421dad484a4931d150aaf0287570762

SHA256
1a93dd5fe516de2ca4e411fa16a719f6c03ce80add1278099616538e20510749

SHA512
9eaeb4db3e8fa9c6e988a1c7e000d39187764ca4d1657749167c7ea899f3baadc042ea56bfb1b3a9fe6234830523b4ab39e1f7f3cf1fe9d2232ed69e65848ead

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit