561d4466a277ba7625b56911fe931cf391b524b9f698a3d977d72f6aa9bd4344

Analysis

max time kernel
67s
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 16:45

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General

Target

2024-04-28_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exe
Size

71KB
MD5

ed64d55e4658cdcd93ae9755199fbbfe
SHA1

1560bdbc32c65f3cbb044c7b7c9eace9ebb9b942
SHA256

561d4466a277ba7625b56911fe931cf391b524b9f698a3d977d72f6aa9bd4344
SHA512

b196fcfded3b6a2f93f2123ccfc134cd18b9e97c7449bf01324949deb671a900844f8e811d0bfddac63d67ed91d7012af6e3fcea3c38a8b1a3da57c6c7673488
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTJ:ZhpAyazIlyazTJ

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4836 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
4836	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_ed64d55e4658cdcd93ae9755199fbbfe_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_ed64d55e4658cdcd93ae9755199fbbfe_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_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2036 2024-04-28_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exe
Token: SeDebugPrivilege 4836 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2036	2024-04-28_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exe
Token: SeDebugPrivilege	4836	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exe

description	pid	process	target process
PID 2036 wrote to memory of 4836	2036	2024-04-28_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exe	CTS.exe
PID 2036 wrote to memory of 4836	2036	2024-04-28_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exe	CTS.exe
PID 2036 wrote to memory of 4836	2036	2024-04-28_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_ed64d55e4658cdcd93ae9755199fbbfe_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2036

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:4836

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
d45bfbbfe7604a6c7f4b8c66832f7343

SHA1
f95c2d1d6958c9d2412510b0b240086c44d9cdb4

SHA256
992052bb4bd1e0333d8aea145e43583da0bcfc2ce6a2389c75a28665784402b5

SHA512
82e919771a6ac98d2a2663827881aa63b40531e48c3bce3efeddf97e9da6a84532295cdbad069e4278d248c50ad1d4acca629ebd042046d068702b4a29531794

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C:\Users\Admin\AppData\Local\Temp\4YqxqqYSAczn7Az.exe
Filesize
71KB

MD5
7a7fbbf767679fb4a14ad68131fb7273

SHA1
d684cd02be9648f5099aa72b552d5cf907a5d7aa

SHA256
3227185b7fd9699f85e6f03de38a7c338e790ec63453c726ec96fce053cd0702

SHA512
c4bb5fff07a57c1ef83db03e213fbd4881f9a9d362aa4438264cc8575a227aab6b09c7663fb2a717404b3bae125cf1bcf41a22875d613de2a456702c33f0efc7

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit