631b34d8ed91665e29597ee1d80ea29fd713a8d92c809ce29826bce969aa8027

Analysis

max time kernel
149s
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
21-05-2024 16:05

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General

Target

2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe
Size

96KB
MD5

ef846a72a62332fdedb7fec0375b6d7b
SHA1

1926eb7099c6bbdc50c03c97f1e71642ecc809bf
SHA256

631b34d8ed91665e29597ee1d80ea29fd713a8d92c809ce29826bce969aa8027
SHA512

936576e43959f1067575bf5cf458bcc70ad376dcb7550a49be7f26f75871bafda1d6018bd76a5b6d4bfdbd5529da7a3481d1ea5e93ea9bf1e9650bfe56135168
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTK3Qdu++54H0wg2:ZhpAyazIlyazTKghLHhg2

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

XQKYIVuXc2sVV8N.exeCTS.exe

pid process

1916 XQKYIVuXc2sVV8N.exe
768 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
1916	XQKYIVuXc2sVV8N.exe
768	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.exe2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_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"	2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2128 2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe
Token: SeDebugPrivilege 768 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2128	2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe
Token: SeDebugPrivilege	768	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe

description	pid	process	target process
PID 2128 wrote to memory of 1916	2128	2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe	XQKYIVuXc2sVV8N.exe
PID 2128 wrote to memory of 1916	2128	2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe	XQKYIVuXc2sVV8N.exe
PID 2128 wrote to memory of 768	2128	2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe	CTS.exe
PID 2128 wrote to memory of 768	2128	2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe	CTS.exe
PID 2128 wrote to memory of 768	2128	2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_ef846a72a62332fdedb7fec0375b6d7b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2128

C:\Users\Admin\AppData\Local\Temp\XQKYIVuXc2sVV8N.exe
C:\Users\Admin\AppData\Local\Temp\XQKYIVuXc2sVV8N.exe
2⤵
- Executes dropped EXE
PID:1916

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:768

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
394KB

MD5
7b5cb61ad370025905472f95065e1924

SHA1
1030b591187e183f353e1144a86e021818ef862e

SHA256
81ecfe24d241dbd8eef898824c61c48d0b66e8bb03d354edd2aeb89913d227a1

SHA512
fa804c90f7a545dbb0af077cc7fda8ea1298b31e8d1c9e9edfac4e0f8bdd86d3597ad2240fbf47d4da2add5636ecf9431ad37fe8e33e832607ddb905348fba92

Download Submit
C:\Users\Admin\AppData\Local\Temp\XQKYIVuXc2sVV8N.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/1916-9-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download