a3653b9eac9d4bd5f8548df2aaa0344d16a0e0550ba354aebbd1fb1f2c6cc372

Analysis

max time kernel
121s
max time network
126s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 19:27

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General

Target

2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe
Size

71KB
MD5

40345618f38ce5925f9ebf3c3fe03d13
SHA1

31cd498492e6be963e2bd1289ae32c566ba833d0
SHA256

a3653b9eac9d4bd5f8548df2aaa0344d16a0e0550ba354aebbd1fb1f2c6cc372
SHA512

97ecaaed4739418dcfdc6855405571755fadc5374eedbec3918f9ad3086b4057f76edaf6ed6d577e03fe62f8bdd75ed8d9a66d15ce963b9da18affe48efde3ef
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTuQ:ZRpAyazIliazTuQ

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1760 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
1760	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_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:

2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2140 2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe
Token: SeDebugPrivilege 1760 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2140	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe
Token: SeDebugPrivilege	1760	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe

description	pid	process	target process
PID 2140 wrote to memory of 1760	2140	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe	CTS.exe
PID 2140 wrote to memory of 1760	2140	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe	CTS.exe
PID 2140 wrote to memory of 1760	2140	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe	CTS.exe
PID 2140 wrote to memory of 1760	2140	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2140

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:1760

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\Temp\YVqt4EQVBGl11MQ.exe

Filesize
71KB

MD5
c9e0618545cd62c529482aa1f9812dc5

SHA1
3e0da078f2c5aeb90d1b329b2245f1569f15a721

SHA256
b92a2bc3bee59daa08888781950c5286391e0d279747122dc1b49f2395ffde72

SHA512
8dcbbe41517ef35186d0e00bda600e05398e6431397896bdd873a76622fdec7a131e6e0ba52386c53046a29e5a93eb65bba4d8038b3c8e44f7517cca2b3132f5

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit