588521f0eea9bce89e593fd591ccab3435353753c4921b0fa6fbd290763a337c

Analysis

max time kernel
148s
max time network
149s
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 01:26

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General

Target

2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe
Size

71KB
MD5

1efce430c2b21deb3fe238459f07f116
SHA1

4195b928cd9b2e79bb13efef4285b978afa0767b
SHA256

588521f0eea9bce89e593fd591ccab3435353753c4921b0fa6fbd290763a337c
SHA512

dbf3eeb26a20116670b27a469a4938f5f9fa4853b507ce5c42d8995c6353bc04d40b732fa87eaf1c6289d918605a16bb85371991aa2cef0ee696abab6b2f97b1
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTy:ZRpAyazIliazTy

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1732 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
1732	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_1efce430c2b21deb3fe238459f07f116_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_1efce430c2b21deb3fe238459f07f116_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_1efce430c2b21deb3fe238459f07f116_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4264 2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe
Token: SeDebugPrivilege 1732 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4264	2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe
Token: SeDebugPrivilege	1732	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe

description	pid	process	target process
PID 4264 wrote to memory of 1732	4264	2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe	CTS.exe
PID 4264 wrote to memory of 1732	4264	2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe	CTS.exe
PID 4264 wrote to memory of 1732	4264	2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_1efce430c2b21deb3fe238459f07f116_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4264

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:1732

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
91d9d7dc168d18bc7bff1b73ee6f4529

SHA1
14d92a025aa4b4c0c61fa669cbe139e6761c1ba5

SHA256
4fecff1cc74f4f153dc3ae449d08cb4806609273d985798f861d06e5bef6e69d

SHA512
19e03dc7e7d05f308af40dae7c526ba794e304d30796def508b0830841b036cb342f9b08e88d99c4e0741f6fe439ccd1915ed3f0d8ac369398c9ee5cd5c8b117

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C:\Users\Admin\AppData\Local\Temp\ogX4SRCt0TucmVi.exe

Filesize
71KB

MD5
61632ac95cf4793c247bb8d995c71dad

SHA1
820df92655ecb6e86aac73539866b62f2424053b

SHA256
c4aa444d44c0c6c8b13ee5452042cd659d276e3b5f334e9c8d9460bf79b8e7a6

SHA512
ff6ce3e328b3e797dbbd7d2e96ccf199a3e9c5f1fc16f2d8c406b4483589045a1a183a227eba6314126f446db354a353adb0763a0774151567f70fc88e4a9de9

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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