52e365e7638b188f2c87d07a0a453d969eed5a2d700b97f4457e28f1e3bca91a

Analysis

max time kernel
134s
max time network
105s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
21/05/2024, 10:31

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General

Target

2024-05-21_eb9c00715e3d9501e281a935223f5ea0_bkransomware.exe
Size

72KB
MD5

eb9c00715e3d9501e281a935223f5ea0
SHA1

5fd873a635d825bcb023828a20b07e554d2fb5b0
SHA256

52e365e7638b188f2c87d07a0a453d969eed5a2d700b97f4457e28f1e3bca91a
SHA512

9aaea45610057d6295dfe1bb7424eb6f32266bb70744a887ee708b8eeae4ee2428b8e3a0af47f6d3136b549f8c737779d0c972c4b32d87f05268bd29fe998da7
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTwHi:ZRpAyazIliazTb

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3620	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"	2024-05-21_eb9c00715e3d9501e281a935223f5ea0_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	2024-05-21_eb9c00715e3d9501e281a935223f5ea0_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1080	2024-05-21_eb9c00715e3d9501e281a935223f5ea0_bkransomware.exe
Token: SeDebugPrivilege	3620	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1080 wrote to memory of 3620	1080	2024-05-21_eb9c00715e3d9501e281a935223f5ea0_bkransomware.exe	86
PID 1080 wrote to memory of 3620	1080	2024-05-21_eb9c00715e3d9501e281a935223f5ea0_bkransomware.exe	86
PID 1080 wrote to memory of 3620	1080	2024-05-21_eb9c00715e3d9501e281a935223f5ea0_bkransomware.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-05-21_eb9c00715e3d9501e281a935223f5ea0_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_eb9c00715e3d9501e281a935223f5ea0_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1080
- 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:3620

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
395KB

MD5
4e9f8116f2a78a3593f50e2710aed776

SHA1
682bfa99793f884834861ece95a0389deec66b90

SHA256
bb7d54fd532bfbff42882a994ab38510b6453ce5ca24f0c10d47c2cdc55b75f0

SHA512
19f6de61bfe237f97985cbf940c2f66ea8d3da900993f3b5f0ed5a61b28b6a0c9162db296525821066ddee58c942f47bbca0c264ed19b366935e63338bfbf991

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C:\Users\Admin\AppData\Local\Temp\8m2hlIwPaQ08oUm.exe

Filesize
72KB

MD5
915e10748a0abdde066e976b9e977dc3

SHA1
17ad771c8f8661c238790674c797115707a268e3

SHA256
2cdabd96825ecd3ebd272f6ac65e386fee8482090d912fa8eb690b7ee2924c38

SHA512
28109d9b95b78dcb71186f25f71171a6ebae4fff896fadd4b4cc86e6047becf0c6ed23124006be72fa84ec55650e3e5c51f6b707f98b337843344705b6547cbb

Download Submit
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