19b73d25d200aa7e59c9add2c571d0559be5d08f7ba04abfa7b72db48e60730c

Analysis

max time kernel
67s
max time network
50s
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 18:23

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General

Target

2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe
Size

172KB
MD5

8f20d6333c4c49bedd58cd61a0087f56
SHA1

7e0707cfc409ea3a3e396d8f433408d860d50581
SHA256

19b73d25d200aa7e59c9add2c571d0559be5d08f7ba04abfa7b72db48e60730c
SHA512

694432f7df0d742cf20774721f936cb17541598053cf89e209c63ef96a00d084c18325195a35b1d9e891596621ac93c18d8ad68585bdda8254159136170653d7
SSDEEP

3072:ZhpAyazIlyazTgmzGSV6GYDUPnA241pLn60QmLSOPtwEBOwsYgK:hZMaz021VYCAJe0QUSkwEBOwf

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

DiOXJQ9oi348fgh.exeCTS.exe

pid process

4212 DiOXJQ9oi348fgh.exe
1748 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
4212	DiOXJQ9oi348fgh.exe
1748	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_8f20d6333c4c49bedd58cd61a0087f56_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_8f20d6333c4c49bedd58cd61a0087f56_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_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4304 2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe
Token: SeDebugPrivilege 1748 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4304	2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe
Token: SeDebugPrivilege	1748	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe

description	pid	process	target process
PID 4304 wrote to memory of 4212	4304	2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe	DiOXJQ9oi348fgh.exe
PID 4304 wrote to memory of 4212	4304	2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe	DiOXJQ9oi348fgh.exe
PID 4304 wrote to memory of 1748	4304	2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe	CTS.exe
PID 4304 wrote to memory of 1748	4304	2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe	CTS.exe
PID 4304 wrote to memory of 1748	4304	2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_8f20d6333c4c49bedd58cd61a0087f56_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4304
- C:\Users\Admin\AppData\Local\Temp\DiOXJQ9oi348fgh.exe
  C:\Users\Admin\AppData\Local\Temp\DiOXJQ9oi348fgh.exe
  2⤵
  - Executes dropped EXE
  PID:4212
- 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:1748

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
4c1eea74de9633d16be8a88c04a2bb80

SHA1
9318ebafc5114a6ccaa9eda3e9a04fa97349635c

SHA256
72efd7e260604bbfb948e99b26dea5d1008b5f8fc37b236214c0a8c029d83893

SHA512
5f89566efa96a10483c05284df84619544ee8c568d6cdcc46095a1e7eb6e93f7977f0d079b28eaa15e97f4e7d58d37ef801553c43b2959ada47240fa8e83b149

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C:\Users\Admin\AppData\Local\Temp\DiOXJQ9oi348fgh.exe

Filesize
172KB

MD5
1193eb52eaf7b95d0baea5a83ccab4fe

SHA1
70e53c61a19eb7765a41a351cdf3ab4bd0f479b1

SHA256
c3b82ab0a6066018a12d6865ad4c2b3fa6530239d1372f6621831f0511e50542

SHA512
b48f8b92a86fc77f9be83bbdcda3cedddd7541db237641aa427934c2d0767b51669739f3c7d2e41c9f1aef0bd9cf11f40b0a0c0cad82b6dfbc8c3c165a31e655

Download Submit
C:\Users\Admin\AppData\Local\Temp\DiOXJQ9oi348fgh.exe

Filesize
100KB

MD5
db697c943fcb215f757f9c22c907c568

SHA1
c57d891472f5ede8b1ee5d9bd6f5ad8fc8e9e5d7

SHA256
07c96337729e3c4c986e8f5660a97cb475c4c04842606be2654b37892af57de9

SHA512
bfa5c34d8c78015ccf96a2ef1c6d8f82157eb88680139bdbb51c55e3cd2a7c41bf364a364fd62b180b202cdf4f3d7d31c3710b8709c1d25a639bb00dfc97b646

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit