8781094b53864d227fa1023e05d5b1249b9ee7424389bf9228dce175a8d210f8

Analysis

max time kernel
67s
max time network
53s
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 09:57

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General

Target

2024-04-28_27952827f6c6916b3fde803a189d7d39_bkransomware.exe
Size

71KB
MD5

27952827f6c6916b3fde803a189d7d39
SHA1

ba0acacf2c2e4d84c528ed61eaf8f87305d44bfa
SHA256

8781094b53864d227fa1023e05d5b1249b9ee7424389bf9228dce175a8d210f8
SHA512

da69379a177eee6ee920c22ea98685de37d71c51f371c1b565829169dd8abb03387192d7adbeae561362f70cfb5a91cd24da2c87d9063364efa6c5d3472218dc
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTQ:ZhpAyazIlyazTQ

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2212 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
2212	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_27952827f6c6916b3fde803a189d7d39_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_27952827f6c6916b3fde803a189d7d39_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_27952827f6c6916b3fde803a189d7d39_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_27952827f6c6916b3fde803a189d7d39_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_27952827f6c6916b3fde803a189d7d39_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 452 2024-04-28_27952827f6c6916b3fde803a189d7d39_bkransomware.exe
Token: SeDebugPrivilege 2212 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_27952827f6c6916b3fde803a189d7d39_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	452	2024-04-28_27952827f6c6916b3fde803a189d7d39_bkransomware.exe
Token: SeDebugPrivilege	2212	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_27952827f6c6916b3fde803a189d7d39_bkransomware.exe

description	pid	process	target process
PID 452 wrote to memory of 2212	452	2024-04-28_27952827f6c6916b3fde803a189d7d39_bkransomware.exe	CTS.exe
PID 452 wrote to memory of 2212	452	2024-04-28_27952827f6c6916b3fde803a189d7d39_bkransomware.exe	CTS.exe
PID 452 wrote to memory of 2212	452	2024-04-28_27952827f6c6916b3fde803a189d7d39_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_27952827f6c6916b3fde803a189d7d39_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_27952827f6c6916b3fde803a189d7d39_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:452

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:2212

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
392KB

MD5
edb2827be413e3bc6641c3e0dc3ee1b9

SHA1
8a138aaaf8c07477a435d801b02add2dda4bfc76

SHA256
afcc94de02ebb3d2701718049543594c0c121054ce8f4a4e088defae5b608d62

SHA512
940e314f02b958fbe32cef2bf8c74a6e0514d3c084a213b5b6e0517f99de0d5d3b06224ba8e9a17918c224bc18949d2c4b0a219e23e583d4f57fdd538cba632b

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C:\Users\Admin\AppData\Local\Temp\VOKn1lYGLUZ1Yj1.exe
Filesize
71KB

MD5
9d1b80e2f72e39b09daf72903a437c86

SHA1
3cb430e4718ef36e92e845433b3afaaf0480554d

SHA256
c0657f24664aa36a404d3420c62347dd219b9b075b1f56b9f2670011e0408638

SHA512
9e57cb3e9c2ed6d54cafea07fff403bf22a9ad5ec1a53bd8b6618763a50d355684e6c63778672fa97af0b105e15e765ae3810153db102dc8bf40e509d967e9cd

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit