565462b36e41374e3fd497ae5cee5d065645c8298fc11405e2b4264149896b2f

Analysis

max time kernel
66s
max time network
53s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 19:29

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General

Target

2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exe
Size

76KB
MD5

5f9719c57238b5973839d8a084008740
SHA1

b63f778e77dbcc6c87be13b55a07bbacc710b1e7
SHA256

565462b36e41374e3fd497ae5cee5d065645c8298fc11405e2b4264149896b2f
SHA512

41e8be352409932e3d7f344e2866dce61133c3d955a7e9aeee092ad0ff6dbf441e34f7bfc2352b78f1a2fb5a32bd78efad2dbb5c92f871a1c095c294b68e2b99
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTLgXS6G:ZhpAyazIlyazTAS6G

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3556 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

pid	process
3556	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_5f9719c57238b5973839d8a084008740_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

Processes:

CTS.exe2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exe

description ioc process

File created C:\Windows\CTS.exe CTS.exe
File created C:\Windows\CTS.exe 2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 636 2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exe
Token: SeDebugPrivilege 3556 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exe

description	pid	process
Token: SeDebugPrivilege	636	2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exe
Token: SeDebugPrivilege	3556	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exe

description	pid	process	target process
PID 636 wrote to memory of 3556	636	2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exe	CTS.exe
PID 636 wrote to memory of 3556	636	2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exe	CTS.exe
PID 636 wrote to memory of 3556	636	2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_5f9719c57238b5973839d8a084008740_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:636

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:3556

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
88e5a5d18fb682f823d81d75e23683c2

SHA1
c4040a824e4516f5a21e61e364ca2be43b20befc

SHA256
06fcfd4d85a8e09bdf996bffbcee8f70777a7f44ae5d4cfcad15bb31598255b3

SHA512
dcf7f4f59fe41bc6cac0c2937a4b3666a6affee7e3707a47c5931ed165814d23818d8c693ed5a741ba9a8e254de8be2d8ade6c17140db2774941c74d525f8d0d

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C:\Users\Admin\AppData\Local\Temp\VcPqd55xEcApMBN.exe
Filesize
76KB

MD5
68afb095688c2faa0cd4819c8bff19f4

SHA1
950925202cc7e7eb38287b03b13fabc6b1a303b6

SHA256
0e9e64c1d5c25a627e0d1c03f1b52c7b1d3066e3100d3a09351043e63f9cca5f

SHA512
2b6743d9b29ddd7487bc27b6d32e94cf931b40bb9b7f8cc0a47984345effc906b4855612feec82517d429a684ab32ac8f78114c82e4b20def214d97c19d73f66

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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