a87e038267ad53af1667b1b916551f6187025dd5003636037b48efd1528ca143

Analysis

max time kernel
93s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 19:30

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General

Target

2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe
Size

71KB
MD5

82539b818249f926538925b85e154b84
SHA1

885227b6b251405989062ef25a41a0f1b5c5fa5a
SHA256

a87e038267ad53af1667b1b916551f6187025dd5003636037b48efd1528ca143
SHA512

37599def62590d6bc731c6eb153ab4488739d4dac822d968a81a1ca05d5a47b0c4c520a990644db55f29ca007ee54e446f32e63fff4670a69e26d52938587df8
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTq5f:ZhpAyazIlyazTq5f

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

792 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
792	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_82539b818249f926538925b85e154b84_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_82539b818249f926538925b85e154b84_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_82539b818249f926538925b85e154b84_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3576 2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe
Token: SeDebugPrivilege 792 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3576	2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe
Token: SeDebugPrivilege	792	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe

description	pid	process	target process
PID 3576 wrote to memory of 792	3576	2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe	CTS.exe
PID 3576 wrote to memory of 792	3576	2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe	CTS.exe
PID 3576 wrote to memory of 792	3576	2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3576
- 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:792

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\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
395KB

MD5
f2d352903a8362203f7bc865e845f133

SHA1
3007d294e054962d32dbf053c5878a8771c49773

SHA256
a8d594bd4954fd55371e25e67ca77097b4f21bb2295108757357ff38122bd5ce

SHA512
35df70bb71ea8eaf60b7aa6ec98b0b863549a4f44234cfff48fe1cdca3aed11f7c2a2d691df73f17e73132375a30b4891c673dde82aaa65648047c698685b33f

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C:\Users\Admin\AppData\Local\Temp\al42elqO1s6uOEV.exe

Filesize
71KB

MD5
91ccb148b7d2dba0db68a275c8c96301

SHA1
3948e3fb9cc8f9598b2f233f6afeb6312f0eba4a

SHA256
ddf75587c6055bf1f5510fec1901a4ff4951a148996aee3abf181335a6c6a436

SHA512
4790e41fadcf7a9b5f7a1ec1295fb23a9fdd2f833d2a2665f2e2da6417d187061534566fa9c50fe3d6f7d2d0fe581c3241513a6518fdbe88d5f74ecf3891bba0

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C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit