b8c1f18cd7d86cbcbe3109cf8fc6140d7ec1f1f11903c5b1b016c0f4e411ec1b

Analysis

max time kernel
136s
max time network
107s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 13:23

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General

Target

2024-05-24_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exe
Size

71KB
MD5

0112052408a58f42677b3ca7f82ae5f1
SHA1

f9b072d49185cd99fcefcb3e9136a26e6b0c98e1
SHA256

b8c1f18cd7d86cbcbe3109cf8fc6140d7ec1f1f11903c5b1b016c0f4e411ec1b
SHA512

a63f1b00e304d1656d94509106ea4765beb3ec2814eca76c7d1e42ee09ba9fcc2426f147b1c260e52e8fd34631f7a8eb20046a8cb5dabcbfa19df482a418e4db
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTx:ZRpAyazIliazTx

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1008 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
1008	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_0112052408a58f42677b3ca7f82ae5f1_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_0112052408a58f42677b3ca7f82ae5f1_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_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1592 2024-05-24_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exe
Token: SeDebugPrivilege 1008 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1592	2024-05-24_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exe
Token: SeDebugPrivilege	1008	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-24_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exe

description	pid	process	target process
PID 1592 wrote to memory of 1008	1592	2024-05-24_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exe	CTS.exe
PID 1592 wrote to memory of 1008	1592	2024-05-24_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exe	CTS.exe
PID 1592 wrote to memory of 1008	1592	2024-05-24_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_0112052408a58f42677b3ca7f82ae5f1_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1592

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:1008

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
a46121395d3e98f4ecdfc7fb387d52e2

SHA1
2adb030a5821a74e7c59d9f7ef6be11922e58824

SHA256
ff567dc12770572db758986305b0c2994be86e304d66bc8d6a488c65bf7bfd61

SHA512
dee51d7a94b2ac180e2bc9310c1f6ed7cc3389846ee33efd51c1a1fa70557859360c1e631e90c3da0e7c4d2fa811e3664ccd38cae57dc8c8448759a4cc55e092

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C:\Users\Admin\AppData\Local\Temp\uqgeGFPCMB3Kszu.exe

Filesize
71KB

MD5
a8476c8a3468ecbd8c94c895b0c79cf4

SHA1
9f90690905d90346e793b9dbe5b3e7c84083de71

SHA256
880208def4366ceec13214504a1a4baf11e98bbbf72f7e36d7755381924935e4

SHA512
3d9986a800ff1c86d70e28b2d17974ed4d40bbd33ea82a00d05e1796cff6ea8ff8d53632cc8ea48f45baf077d29c70de1edecc9f386ae7acec5dc8eef9067939

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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