701eb98eca2a5282657503f29b3285a09ca3f40fcbb878c4f2f7c5106c135cf7

Analysis

max time kernel
133s
max time network
102s
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 22:06

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General

Target

2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe
Size

656KB
MD5

17d78877a0b061aee8e242903af7825e
SHA1

b40f5c296134a9cf00c3baab5a8afcbd84799e85
SHA256

701eb98eca2a5282657503f29b3285a09ca3f40fcbb878c4f2f7c5106c135cf7
SHA512

6dfd2cc62e2f54867f9e5078f0ab97e7d5d7da33b88f0e12674c76a0982cf846ccb9ab73993829668eadc8701694bd389421e3c29cdffeb2ff458b06c24109da
SSDEEP

12288:xC03+RlXPt7sMaQv/cuiW5+c2uOr0Akf00MT75TfgIvz1nHg:D3+RdIQv/jV+CA7XzgYz1Hg

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

tB1NUYgxjPkeRZB.exeCTS.exe

pid process

320 tB1NUYgxjPkeRZB.exe
1236 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
320	tB1NUYgxjPkeRZB.exe
1236	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_17d78877a0b061aee8e242903af7825e_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:

2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3372 2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe
Token: SeDebugPrivilege 1236 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3372	2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe
Token: SeDebugPrivilege	1236	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe

description	pid	process	target process
PID 3372 wrote to memory of 320	3372	2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe	tB1NUYgxjPkeRZB.exe
PID 3372 wrote to memory of 320	3372	2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe	tB1NUYgxjPkeRZB.exe
PID 3372 wrote to memory of 1236	3372	2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe	CTS.exe
PID 3372 wrote to memory of 1236	3372	2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe	CTS.exe
PID 3372 wrote to memory of 1236	3372	2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_17d78877a0b061aee8e242903af7825e_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3372

C:\Users\Admin\AppData\Local\Temp\tB1NUYgxjPkeRZB.exe
C:\Users\Admin\AppData\Local\Temp\tB1NUYgxjPkeRZB.exe
2⤵
- Executes dropped EXE
PID:320

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:1236

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
d57e07381501da38d3b88d929a4c3551

SHA1
1073ad2453e8fedc5d451761588cb86e8a0ab323

SHA256
1577072c7aef3dda74f8280ab8e43797e7b5f75be4be9bb2fc467b8bdd9c5f62

SHA512
6ac2edb41e89de4958963ce0005df1529d7e22fb138173ca0f7417deacbe92bc5d269377f9a23d498d48cde5aa48110b5a8e6f0da87dbc9fd43f46ebe82b42bb

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C:\Users\Admin\AppData\Local\Temp\tB1NUYgxjPkeRZB.exe
Filesize
656KB

MD5
9c79adb0dabc9130d5655f2d0cc90d95

SHA1
5aa9ce671feb1f1fe52b04638a26b98f7eeefc9b

SHA256
202336ce7c09366f29207d2d0e5c2fdc016b22b3887e7ccd225632278583e318

SHA512
e0efddd21286730725bd7867336978653f4dad81f69abae6e6d140076f1aef8fd95155eed70f076471b43962cc7c8f0108dfaa2c7e566d5701153ea765bd1da7

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C:\Users\Admin\AppData\Local\Temp\tB1NUYgxjPkeRZB.exe
Filesize
584KB

MD5
487138792576238d76ad63497f050803

SHA1
48379948ed6a93c4df1116b51d33e15627d67945

SHA256
3515e307cf21fe8f37112b3a6e79c3c3b50aa202cc000df4bbf3343f083a2f70

SHA512
b163fd09be5db2e20ec91745fdcc1615d6c71758d1309a33d4a27c5f57c6259ff11a120d4d58e281b26e59fcf90f982d1bd91a21b5e4883dc8e9537eccc46425

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

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit