741238aeb16109d98c8fce04d8d69200eb69d2929feb6a40f40b025d2fbe8174

Analysis

max time kernel
132s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
15/05/2024, 14:31

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General

Target

2024-05-15_a97d09a867eddf3885cc5f689436076e_bkransomware.exe
Size

71KB
MD5

a97d09a867eddf3885cc5f689436076e
SHA1

ce0b1e9f94908829bbf2e7298996e4ac3574aa9e
SHA256

741238aeb16109d98c8fce04d8d69200eb69d2929feb6a40f40b025d2fbe8174
SHA512

527967b60febd2c05b466e558c9bbf366f705fba6768d834b6b5df9774805fa5f646af242b9725ac87c8a68d0e093c2b846ad5724c70d26de7132ab8dd828919
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTq:ZRpAyazIliazTq

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
540	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"	2024-05-15_a97d09a867eddf3885cc5f689436076e_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	2024-05-15_a97d09a867eddf3885cc5f689436076e_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2808	2024-05-15_a97d09a867eddf3885cc5f689436076e_bkransomware.exe
Token: SeDebugPrivilege	540	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2808 wrote to memory of 540	2808	2024-05-15_a97d09a867eddf3885cc5f689436076e_bkransomware.exe	82
PID 2808 wrote to memory of 540	2808	2024-05-15_a97d09a867eddf3885cc5f689436076e_bkransomware.exe	82
PID 2808 wrote to memory of 540	2808	2024-05-15_a97d09a867eddf3885cc5f689436076e_bkransomware.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-15_a97d09a867eddf3885cc5f689436076e_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_a97d09a867eddf3885cc5f689436076e_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2808
- 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:540

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
392KB

MD5
34d4a889c97bd5169512ee5a68be6ccb

SHA1
e65830d6ebc34d60153bb948fadb22fd4ac90857

SHA256
7e3f412182baff0bd05885f47745468cffef8841257185d874954a252024b0e9

SHA512
a8fcb46c9437fa01d01c3887ee85cd54b2fb7f54df6b79b53b4bce5a3c44e8cdb89e1d7318eb75046ce2c7247d5d8f05f30193b249741144cdc6a3ddc0a350b3

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C:\Users\Admin\AppData\Local\Temp\kAf5r6gRpwx30y8.exe

Filesize
71KB

MD5
8c5946ea541d5e2eb9bc48bc1875b818

SHA1
30995b50638a096b75808d9f20aa289c5d41d76b

SHA256
cf568e04c3eaa67785d471c4e4e050ae552ad825e1be91537df5992d264bf754

SHA512
4d0a3d3d1b8a1b2b23e1fa9af69f892e7dc12213122190f310ac8ebb45d61ed207b9758ba6115bb7c0600f58ba87707e3dc880e0873e18fe4ff8f9487dfc7a9c

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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