fc737c06f39636c60d85be8b7612337e8c132cf089e250458d9e88b76046586a

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 20:45

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General

Target

2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe
Size

321KB
MD5

c5b6e457b5fb55f74a3b0dc1c260c5f5
SHA1

0e13f5f96d9ab579f77da700a118a85eb9b4b62e
SHA256

fc737c06f39636c60d85be8b7612337e8c132cf089e250458d9e88b76046586a
SHA512

0bea6327fe8ba4f4da4d1e13c20c99d9766676f8bcd1a6da993d107be83a8e4be67b578b0a53d4a7279022f3b17fa900a35f243682e6f5a035187d2683843838
SSDEEP

6144:xZ8azcOCNXarguTb0GvvlKyIGwb0bsuPArdVpD/WJc:xC0cTq0OD3JIRwfAxVL

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

blAE7Rtrb1EWQ0V.exeCTS.exe

pid process

940 blAE7Rtrb1EWQ0V.exe
2836 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
940	blAE7Rtrb1EWQ0V.exe
2836	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_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:

2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 968 2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe
Token: SeDebugPrivilege 2836 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	968	2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe
Token: SeDebugPrivilege	2836	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe

description	pid	process	target process
PID 968 wrote to memory of 940	968	2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe	blAE7Rtrb1EWQ0V.exe
PID 968 wrote to memory of 940	968	2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe	blAE7Rtrb1EWQ0V.exe
PID 968 wrote to memory of 2836	968	2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe	CTS.exe
PID 968 wrote to memory of 2836	968	2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe	CTS.exe
PID 968 wrote to memory of 2836	968	2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_c5b6e457b5fb55f74a3b0dc1c260c5f5_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:968

C:\Users\Admin\AppData\Local\Temp\blAE7Rtrb1EWQ0V.exe
C:\Users\Admin\AppData\Local\Temp\blAE7Rtrb1EWQ0V.exe
2⤵
- Executes dropped EXE
PID:940

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:2836

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
616c981a49a244c6bb453f837b82150e

SHA1
a14d165de54e488ac4c677b02dbd98c95498161b

SHA256
5194cef428417aee1682a2a9917d460012d787f9980985de4b1ab733e8ccce9f

SHA512
0289aac6e96c4282d461f704980cece39ff2ffda29fc3d75cb03d3f5911d3b94bb572a4b706969999bd8cb5b14ec2399527312fda764a164d2ea842cc50c7192

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C:\Users\Admin\AppData\Local\Temp\blAE7Rtrb1EWQ0V.exe

Filesize
250KB

MD5
9386c7ffb682c69eadb492071138f495

SHA1
cd4cda7c97645a9ce694f9543b989e5fb898bbe7

SHA256
a4c297fc0b96651ebb71b15398025f80d1f6f592330792ba3eb01d9cd56f9f99

SHA512
9b7c2ee269d6f6f33f8656d9e3958036b441246304dce499e9ada4c7dc844a8d4b42deafc5e1d25dc50d069393f0ce9cdc5765a7ca7b3393511d1defba4f7d21

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit