b5dab42797ee606a56349691b2a06e3eaf9c1f5b8a28d53e001268dcbf6265a1

Analysis

max time kernel
55s
max time network
51s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30-04-2024 11:16

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General

Target

2024-04-30_7c30221242e28e316a6bf319d6077e93_bkransomware.exe
Size

174KB
MD5

7c30221242e28e316a6bf319d6077e93
SHA1

6dc072baef88ddfe927ced46bfbb48d13d7e4bf6
SHA256

b5dab42797ee606a56349691b2a06e3eaf9c1f5b8a28d53e001268dcbf6265a1
SHA512

544670b1f053e3d8ffaa3c521e00b8286c7b2496dbeeedf9c893bc4f8ec76788a85c12691cbb7489dd8f1720ee85726d638fdc385a2f0ab8a18b30d9233cd2ea
SSDEEP

3072:ZRpAyazIliazTGZ+mmg834hQbnQff09wh1r7HyywbO3NDPHnuMBbYn:xZ8azihK3FbnQnjvruXchPH3Yn

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
4780	NrDzE9sDEFrQkZC.exe
3576	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"	2024-04-30_7c30221242e28e316a6bf319d6077e93_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	2024-04-30_7c30221242e28e316a6bf319d6077e93_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4692	2024-04-30_7c30221242e28e316a6bf319d6077e93_bkransomware.exe
Token: SeDebugPrivilege	3576	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4692 wrote to memory of 4780	4692	2024-04-30_7c30221242e28e316a6bf319d6077e93_bkransomware.exe	83
PID 4692 wrote to memory of 4780	4692	2024-04-30_7c30221242e28e316a6bf319d6077e93_bkransomware.exe	83
PID 4692 wrote to memory of 3576	4692	2024-04-30_7c30221242e28e316a6bf319d6077e93_bkransomware.exe	84
PID 4692 wrote to memory of 3576	4692	2024-04-30_7c30221242e28e316a6bf319d6077e93_bkransomware.exe	84
PID 4692 wrote to memory of 3576	4692	2024-04-30_7c30221242e28e316a6bf319d6077e93_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-30_7c30221242e28e316a6bf319d6077e93_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_7c30221242e28e316a6bf319d6077e93_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4692
- C:\Users\Admin\AppData\Local\Temp\NrDzE9sDEFrQkZC.exe
  C:\Users\Admin\AppData\Local\Temp\NrDzE9sDEFrQkZC.exe
  2⤵
  - Executes dropped EXE
  PID:4780
- 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:3576

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
8744322b9d8ca2ef712de743cac75189

SHA1
e954c46a17ef3be1983dc2ea61e010aa7805990f

SHA256
25bd217c8e3d9b9cdf61e619171b76a41e94361eb8465c35cc7b28907b399728

SHA512
e82df8c1f45e4f49cc7c0bdfc1005e0959879ff53e38dfc43b3bdd0b540d4e88cbb5a6889627e91b01b73650569c85ee249646fdf81f02aa45eb39a0c7f00135

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C:\Users\Admin\AppData\Local\Temp\NrDzE9sDEFrQkZC.exe

Filesize
103KB

MD5
40e6081a84568a750c469df520dd0ae1

SHA1
fcc160e9f213a7ce674861c9f4efab2b9f0b13d5

SHA256
b33db48ce11539130b143caa2eec3a38c439de13a2aeffed07cb9b89bcc82fd4

SHA512
91feb528a2c033d0f5261a6c244b640a988d1a42caf0b8bd144a458555a1172e9ac7b23d2ff9304366559008cf3f92445ce59398a3756c0ed3ef343b824f82a2

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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

Replay Monitor

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Downloads