2c4f5ec9ddf31935bdfaa6bc5addd83fb0e1d7f327f9113d727f420c4f56bdde

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
12/05/2024, 21:05

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General

Target

2024-05-11_2eedd3787269c9c34397ebc43c857c2f_bkransomware.exe
Size

153KB
MD5

2eedd3787269c9c34397ebc43c857c2f
SHA1

de0f6affb51e1dfb494954e513655aae55369dd2
SHA256

2c4f5ec9ddf31935bdfaa6bc5addd83fb0e1d7f327f9113d727f420c4f56bdde
SHA512

10be8ac3113eca1002b75e3b8cf68f9fba8ae19a693f9d4d38e106c3d6ba50aca657e4c8309c8781ed7082d3d282d13249dac0765623a515b29e2c682dd03b3a
SSDEEP

3072:ZRpAyazIliazTZ8YfJi53V+TGzcuoLMK14U6U6liRIsbh:xZ8azNxipV+TGQNoK5WM

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4188	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

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"	2024-05-11_2eedd3787269c9c34397ebc43c857c2f_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	2024-05-11_2eedd3787269c9c34397ebc43c857c2f_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1688	2024-05-11_2eedd3787269c9c34397ebc43c857c2f_bkransomware.exe
Token: SeDebugPrivilege	4188	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1688 wrote to memory of 4188	1688	2024-05-11_2eedd3787269c9c34397ebc43c857c2f_bkransomware.exe	81
PID 1688 wrote to memory of 4188	1688	2024-05-11_2eedd3787269c9c34397ebc43c857c2f_bkransomware.exe	81
PID 1688 wrote to memory of 4188	1688	2024-05-11_2eedd3787269c9c34397ebc43c857c2f_bkransomware.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-05-11_2eedd3787269c9c34397ebc43c857c2f_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_2eedd3787269c9c34397ebc43c857c2f_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1688
- 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:4188

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
394KB

MD5
d151a87aeaa45d5677de2c9ad9646f5a

SHA1
5d7cc61b10640ce24d853c99a9a8cee18c069b15

SHA256
56e79ff11470674761817a46d8dda0e6b91ece134b37b3f5872e1916d64bba05

SHA512
29534dc2ebbd985fc4e33d0aa49c785ef032a2620c6e8f99d598e61c6d2f54009982eb9c254844cb119f239f8d85375c425da82c30c079680c333f388c9451b1

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C:\Users\Admin\AppData\Local\Temp\RtTL0SJrkGQUisa.exe

Filesize
153KB

MD5
a43e7e94fc57d9c94a72adc9c29a0464

SHA1
0a18c3c8ea1531980da177aaec9b2763312bbcac

SHA256
a93a60a99bbc4e61504cd43a2a28df96e74b3e71613d45cd1a633f3a02a81117

SHA512
7830204be7e6ecccf9f46674d646826a16e441e26182dfaca6f7e90db907332f6716e11779d92eb38bc01439a9079a9f2d0ed197c975bb4cc2d3ba6f2a1aa3ef

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads