c45b654bddcf4e5c567f72c502090149b4e9d73369242c3db18cc898494f4221

Analysis

max time kernel
133s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
25/05/2024, 00:42

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General

Target
2024-05-25_77e0ed0bf7c212c0d8799c11b49d3a42_bkransomware.exe
Size 71KB
Sample240525-a2kv4agh25
SHA256 c45b654bddcf4e5c567f72c502090149b4e9d73369242c3db18cc898494f4221
MD5 77e0ed0bf7c212c0d8799c11b49d3a42
SHA1 f131b058a6439aa95c368424f334c4fee7bb4c9b
SHA512 72f35f28277226052c3b07984f610e6379c2dc2c5f04502d230c1580155162f6b70a196d947a8f4160e87f73d49b41c2b5bd62a4c41b82d9385b24c07edb9e40
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTu:ZhpAyazIlyazTu
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1864	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"	2024-05-25_77e0ed0bf7c212c0d8799c11b49d3a42_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	2024-05-25_77e0ed0bf7c212c0d8799c11b49d3a42_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4648	2024-05-25_77e0ed0bf7c212c0d8799c11b49d3a42_bkransomware.exe
Token: SeDebugPrivilege	1864	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4648 wrote to memory of 1864	4648	2024-05-25_77e0ed0bf7c212c0d8799c11b49d3a42_bkransomware.exe	83
PID 4648 wrote to memory of 1864	4648	2024-05-25_77e0ed0bf7c212c0d8799c11b49d3a42_bkransomware.exe	83
PID 4648 wrote to memory of 1864	4648	2024-05-25_77e0ed0bf7c212c0d8799c11b49d3a42_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-25_77e0ed0bf7c212c0d8799c11b49d3a42_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_77e0ed0bf7c212c0d8799c11b49d3a42_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4648
- 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:1864

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

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 392KB
SHA256 5b99d42baa53965eb9bd8aee17d508c15cb7414fe6204afe7112891d82500558
MD5 cac52578838040a96ceb08f2471f14a0
SHA1 a8a417669703109dcd37e309c24fdcc2d710c713
SHA512 e81d5f1adf742a3bbef7dae27e0b3c40366bde999745f63671e5aff16c1dc486463e1b7a67f284be8f52c8643e299773ff2e988d181dd7d65e7dc0084532cb42
SSDEEP 12288:hS0hCo6hiENOPekWJ6hWJ3NbWdN9KZcxAV6wl:DzAbNOekWJ6hWJAdNFxDwl
MD5 SHA1 SHA512 SSDEEP

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4fBTGVCuG49zQNX.exe

Path C:\Users\Admin\AppData\Local\Temp\4fBTGVCuG49zQNX.exe
Size 71KB
SHA256 1b60f0e820b3f931dda574614df19aab846f2f14ac7b612a208c85b6f3b2d42e
MD5 30dcfd20dd6a2bc52ed71891e05ae49d
SHA1 a48fa3ee49a20705281568218eb8510aaa2ad8d8
SHA512 339fe4cf6c124aee7d7ab2ec142c9acc2239ca3956a1d414c0b78f669c8437762ae5fe9bc9ede30283cd2aebdfe572112410256737c1513054df9461feea7a55
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTP:ZhpAyazIlyazTP
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
MD5 66df4ffab62e674af2e75b163563fc0b
SHA1 dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA512 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT:ZhpAyazIlyazT
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads