75b1a0e97ea954bd18c7a4a5aacc0a1a857b52ab32be11258f2575094e9ce777

Analysis

max time kernel
94s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
06/07/2024, 21:25

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General

Target

2024-07-06_637ac1df69a04c8180e4a442b673c03f_bkransomware.exe
Size

71KB
MD5

637ac1df69a04c8180e4a442b673c03f
SHA1

ffb9b4c82084f7fee37ae38111c9d349b34a408c
SHA256

75b1a0e97ea954bd18c7a4a5aacc0a1a857b52ab32be11258f2575094e9ce777
SHA512

418314bb6272a934efc5366fbeb7705a77a03ce4d0ff9446eabda916efd16a2f540b5816de4ee0be33a74913be75690c1bff552091f3b0751cf4da7e14f17232
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTa5:ZhpAyazIlyazTA

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3044	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"	2024-07-06_637ac1df69a04c8180e4a442b673c03f_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	2024-07-06_637ac1df69a04c8180e4a442b673c03f_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2800	2024-07-06_637ac1df69a04c8180e4a442b673c03f_bkransomware.exe
Token: SeDebugPrivilege	3044	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2800 wrote to memory of 3044	2800	2024-07-06_637ac1df69a04c8180e4a442b673c03f_bkransomware.exe	84
PID 2800 wrote to memory of 3044	2800	2024-07-06_637ac1df69a04c8180e4a442b673c03f_bkransomware.exe	84
PID 2800 wrote to memory of 3044	2800	2024-07-06_637ac1df69a04c8180e4a442b673c03f_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-07-06_637ac1df69a04c8180e4a442b673c03f_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-07-06_637ac1df69a04c8180e4a442b673c03f_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2800
- 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:3044

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
78480bbe63a050b4b20af4fdc8ebc983

SHA1
1ab8c019d88fed244e7d3448ea68c132c49008cb

SHA256
a59980f55395353c752275b6890c30c1460b8c1862fe1f2e87e006fcc2554ed6

SHA512
955e6977d7ff240af07401044c3a0f7acd3ea496326b530e97a4431eee5af13d6e65930bbc8e88cb634af3698ac9cea22874a6957af757229949e193e6467ed0

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C:\Users\Admin\AppData\Local\Temp\rGaZHj3iGFn71MA.exe

Filesize
71KB

MD5
3bc0f103dc8dc0d181735534f2a65e0c

SHA1
7232ed2d7d80cff90b733514cfb0a67d2c9bf6c5

SHA256
9c1c98bd6704d7c3500f21fd8ad8a32207e110a08e889909c41161e21b1a21d3

SHA512
0189fd97bac4f4ec7a8e72eef24a703491648d1efd165fc23ae973390ad8c6810a880fdce6d8d94a45b7201996f0371cabc46d15eff883e7681fddea7565e959

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads