31cd90d982c494e1f05ac4383b169718b60090b61a669582383817c28963ec08

Analysis

max time kernel
93s
max time network
122s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
27/06/2024, 20:24

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General

Target

2024-06-27_5c360a29cb295230d637d85f03b0674d_bkransomware.exe
Size

71KB
MD5

5c360a29cb295230d637d85f03b0674d
SHA1

50d518b2f0bd64a7b555b36041e9e9774fa8cb04
SHA256

31cd90d982c494e1f05ac4383b169718b60090b61a669582383817c28963ec08
SHA512

a963eca8f1194beef7219f146c8a4d65d64ea4b989ea09ed8320ff15e8b847ef8c2d88543a7f6597b94bfc75714231fd8c389671a3df8f8b9e914d7c6990f767
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTwH:ZhpAyazIlyazTM

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
5072	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"	2024-06-27_5c360a29cb295230d637d85f03b0674d_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	CTS.exe
File created	C:\Windows\CTS.exe	2024-06-27_5c360a29cb295230d637d85f03b0674d_bkransomware.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	964	2024-06-27_5c360a29cb295230d637d85f03b0674d_bkransomware.exe
Token: SeDebugPrivilege	5072	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 964 wrote to memory of 5072	964	2024-06-27_5c360a29cb295230d637d85f03b0674d_bkransomware.exe	80
PID 964 wrote to memory of 5072	964	2024-06-27_5c360a29cb295230d637d85f03b0674d_bkransomware.exe	80
PID 964 wrote to memory of 5072	964	2024-06-27_5c360a29cb295230d637d85f03b0674d_bkransomware.exe	80

C:\Users\Admin\AppData\Local\Temp\2024-06-27_5c360a29cb295230d637d85f03b0674d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-27_5c360a29cb295230d637d85f03b0674d_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:964
- 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:5072

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
75b1815b9dab8e1ba2af6e199bda32c7

SHA1
ad0b26a318c36899b260157235bf286bf7f18179

SHA256
1dc20e60bc556ffc60e40b4387fd5dd50aeb7c129854a83286a8abae14be24c9

SHA512
234d34221392b2e0faf6eb97d8cc47fbeafa624f1e777cf042fe8fc05f479c718477ee3f9b48a7f64b21f532fd25755f980bb8cd74531da564c4224ff48b3f9a

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C:\Users\Admin\AppData\Local\Temp\KjlV1RwC421yNbN.exe

Filesize
71KB

MD5
1cdb26a289ddebb6f6fb7fe803cae63a

SHA1
289c09b15e6be1e1823a3a7ab3481e4270f4276b

SHA256
058fceacc84323c13995890fc0eebeb87fea09c865ce795c3eede41d48d34f0e

SHA512
d0505dfc42f8cb56ece305c2aa8efb105af318fcea37a696ef5b07d70b68dec435b4993e790dd8a0eed5e0a1d627e63f61e07bb0f96da024bfa3fd18cce448a0

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

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Downloads