b5c21cc5d71bd5d0bf7a365e766be1ad4b5f589bfaa9962885018bdf0ef77141

General

Target

2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe
Size

96KB
MD5

4f01fba0b2742fe348ea0c52e888bb9e
SHA1

c396e8a2bd755eabef9cb86c37e3cfced1d7b3bb
SHA256

b5c21cc5d71bd5d0bf7a365e766be1ad4b5f589bfaa9962885018bdf0ef77141
SHA512

0026bc70c8344c90dbcdce2304ccd420f7dc41978fa07bbc513077f309883e245850c35f3756951be2e9b20b1fbcefc2f888f5ac0c514e0e13074a1ab874e376
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTw/qI7r+rs+Yls24:ZhpAyazIlyazTw/q4r+124

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1920	Kt4mM3jvjmvOXtt.exe
1612	CTS.exe

Loads dropped DLL 3 IoCs

pid	Process
2188	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe
2188	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe
1728	Process not Found

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_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

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2188	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe
Token: SeDebugPrivilege	1612	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 1920	2188	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe	28
PID 2188 wrote to memory of 1920	2188	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe	28
PID 2188 wrote to memory of 1920	2188	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe	28
PID 2188 wrote to memory of 1920	2188	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe	28
PID 2188 wrote to memory of 1612	2188	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe	30
PID 2188 wrote to memory of 1612	2188	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe	30
PID 2188 wrote to memory of 1612	2188	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe	30
PID 2188 wrote to memory of 1612	2188	2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_4f01fba0b2742fe348ea0c52e888bb9e_bkransomware.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2188
- C:\Users\Admin\AppData\Local\Temp\Kt4mM3jvjmvOXtt.exe
  C:\Users\Admin\AppData\Local\Temp\Kt4mM3jvjmvOXtt.exe
  2⤵
  - Executes dropped EXE
  PID:1920
- 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:1612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Kt4mM3jvjmvOXtt.exe

Filesize
96KB

MD5
c7fbecab3add00bcb7dc10dc05580120

SHA1
5dafe72bc45aea32c2be2866145f762c38809b6d

SHA256
abe634fa68cc55c58d71347c8f8e94417fee7e68dab69e9fdaa2b494a39edf53

SHA512
9646a7c8f108da1336b2f610351a59d64599af110cae34bbcea43546dd6d8bd1253e4512dd04290c23cf36e7bc7237a22aa3eefc7f989d2214bebd8019b2f4e9

Download Submit
C:\Users\Admin\AppData\Local\Temp\Kt4mM3jvjmvOXtt.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/1920-15-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads