f5f39afafd04b7ee684e4d82468d9bea613ab98ff50f9b12a37ebad75b8371ca

Analysis

max time kernel
149s
max time network
151s
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 21:27

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General

Target

2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe
Size

96KB
MD5

2353087a62ffefed7787a4a564229d00
SHA1

e174e48f98004c8025d434d81897e5185ee3c8f0
SHA256

f5f39afafd04b7ee684e4d82468d9bea613ab98ff50f9b12a37ebad75b8371ca
SHA512

588fd7f5c8b4f76255e0b348fe04256eae91ed0c1489f7da310e68aedd6a20d607b33f51a4f4ec4870a36e05e09ad20a32ec065ea89cee1c33885f76a9226e83
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTWgapbJHuqn5sOWvV8Vg2/KM:ZRpAyazIliazTWgcNHuUYN8L

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

1LsncopLGhVZF4a.exeCTS.exe

pid process

3480 1LsncopLGhVZF4a.exe
4664 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
3480	1LsncopLGhVZF4a.exe
4664	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_2353087a62ffefed7787a4a564229d00_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_2353087a62ffefed7787a4a564229d00_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_2353087a62ffefed7787a4a564229d00_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4528 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe
Token: SeDebugPrivilege 4664 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4528	2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe
Token: SeDebugPrivilege	4664	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe

description	pid	process	target process
PID 4528 wrote to memory of 3480	4528	2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe	1LsncopLGhVZF4a.exe
PID 4528 wrote to memory of 3480	4528	2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe	1LsncopLGhVZF4a.exe
PID 4528 wrote to memory of 4664	4528	2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe	CTS.exe
PID 4528 wrote to memory of 4664	4528	2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe	CTS.exe
PID 4528 wrote to memory of 4664	4528	2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4528

C:\Users\Admin\AppData\Local\Temp\1LsncopLGhVZF4a.exe
C:\Users\Admin\AppData\Local\Temp\1LsncopLGhVZF4a.exe
2⤵
- Executes dropped EXE
PID:3480

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:4664

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
a9548290a48da1e428e28e3f030441ed

SHA1
01a6122b51d68b4d2fcd782919fb931207c1b760

SHA256
4c964b2521bec4f2a06494691289154cfb9c51011ddca4a693185d0a0d4ee33d

SHA512
1790f19cbbabaed2f0b130f1e4d498041f3c0de80b9a17d0535e251ffefee3d388c4927913ac7d814860ce0e1ef2e68642c4165c1e5877d73829353272c16f8e

Download Submit
C:\Users\Admin\AppData\Local\Temp\1LsncopLGhVZF4a.exe
Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

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

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
memory/3480-14-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download