c65f3aad3e76bcb6bb84c97ca7201806fb4a4a4c76c9b082b423733463b38aac

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 16:37

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General

Target

2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exe
Size

71KB
MD5

9f4456aa1bc38efa3fbcfffe2a3b26b7
SHA1

adc72d47681436085c17113d8e11d2cc2faba4a0
SHA256

c65f3aad3e76bcb6bb84c97ca7201806fb4a4a4c76c9b082b423733463b38aac
SHA512

21e0f59d66e0c97af877b12033c38c8f5848f1853bfc96551b739ba3b6792a412f4de0fdeb4113c883618b66547036c9d1a17c76c21d7111d6df70ad2a5f7327
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTN5:ZhpAyazIlyazTf

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2004 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
2004	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_9f4456aa1bc38efa3fbcfffe2a3b26b7_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_9f4456aa1bc38efa3fbcfffe2a3b26b7_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:

2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4816 2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exe
Token: SeDebugPrivilege 2004 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4816	2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exe
Token: SeDebugPrivilege	2004	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exe

description	pid	process	target process
PID 4816 wrote to memory of 2004	4816	2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exe	CTS.exe
PID 4816 wrote to memory of 2004	4816	2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exe	CTS.exe
PID 4816 wrote to memory of 2004	4816	2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_9f4456aa1bc38efa3fbcfffe2a3b26b7_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4816

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:2004

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
278f0176c127fc6ed3b9a8e1b8dc0038

SHA1
0ba84d2490dd46bf78ab3ea545dc7db04ce044a7

SHA256
23b89fe44f07bb2aa5ab05b19e0e8b97c9aab7d044ddd9760026894e3269b565

SHA512
b2b81de4fc08c04e8a994000ee16d3f082ae9ca9ac614dd5dddcbf32feb2f7a55eeeab7072640114404dcbf54861d25d5fed5b0cda2d5b506d0cd5cb5a77e048

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C:\Users\Admin\AppData\Local\Temp\4Xe65MH8NyfIlw7.exe
Filesize
71KB

MD5
05093ba70ea33d89c0bf4a53e99749b6

SHA1
47a84f2d51c891abab5c272613bd33cca7af9662

SHA256
3f935d308f00f1cfce399bfd2416579730634890654a997bda144bfbe7efe8d5

SHA512
287596e033b00c99969eabbf7af12e1f18838a82dab68f38cfa2e38badab2221794823f0d39c845fec08eaa4098aaac4c822da5125311208a9b8e33f725f78f9

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit