a275f2b743c33398dfda87aa1b7ffdd3947034be5faaa109e2a470dfa46ec553

Analysis

max time kernel
132s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 21:37

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General

Target

2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe
Size

71KB
MD5

7ecf7ff4c92145dd9cc31c32232b37c8
SHA1

3384a8808c8f5fdc5a7fe4880e23cb9ee35d977a
SHA256

a275f2b743c33398dfda87aa1b7ffdd3947034be5faaa109e2a470dfa46ec553
SHA512

f8ecd7799a7c51336522a13869bf147cc50c6b24eb578f36ef1302f04f247f307c02f062d41ff5350f367335d9ebafbf3e2e479ef95559acefda20d7b6a7152c
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTu:ZRpAyazIliazTu

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4376 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
4376	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

CTS.exe2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1836 2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe
Token: SeDebugPrivilege 4376 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1836	2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe
Token: SeDebugPrivilege	4376	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe

description	pid	process	target process
PID 1836 wrote to memory of 4376	1836	2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe	CTS.exe
PID 1836 wrote to memory of 4376	1836	2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe	CTS.exe
PID 1836 wrote to memory of 4376	1836	2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_7ecf7ff4c92145dd9cc31c32232b37c8_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1836

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:4376

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

Replay Monitor

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Downloads

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

MD5
3a52ee70474ec089a77e67f84f3976a0

SHA1
b5deea2ac8be3d57def27c3348ab0125b9ae515c

SHA256
849545599955d9e24ea0b7b772028f4f471f5d3c61e8b5fdece3c4eee44365f7

SHA512
ac3014a899bfc09d613b561636172b6034475a02666856c6159eacaa78ecc16c03e7d8f2b24f625e770cf7ff66b097f342af86900878a6bd11e7afe0c4a16fa3

Download Submit
C:\Users\Admin\AppData\Local\Temp\a1ywSYBPMOsbFPJ.exe
Filesize
71KB

MD5
28e8856f1e3b8b958aabe104ff0cbf0f

SHA1
9f25cfafe6e4bfd4f25760e3255a845f67caf835

SHA256
ee8431f7870a115f2dae5bb85ba9b5fcab1015945ccac6359025512fe9764b0c

SHA512
cf5dd6cbbebb3d316c3cf71989f054a6da7108da97f947535ddbf0637bf7c6c756d980825239767421c432373610e4340b565944f1abf0824ecb99eaa73cd035

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit