15da68cd48dc28430336705726915197009f6c5244d51354f8041156d0cbd92f

Analysis

max time kernel
62s
max time network
51s
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 05:52

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General

Target

2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe
Size

96KB
MD5

303a48219c6e6e216be49784de716d16
SHA1

08e529e2f2f32d590003f50ac941d000b008ccb8
SHA256

15da68cd48dc28430336705726915197009f6c5244d51354f8041156d0cbd92f
SHA512

3dd90c3b8a7fb4adbfcecea127e9213598f3f0144bdaa03c46f9c7ef1c3744e4d0e6113322c8ddea9fd56a5152bdcca78390844ea5ea3db4d8728003e4da83b5
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTMXrGy2B1gEMlP4PJ:ZRpAyazIliazTMXrGyS1g9lgx

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

fjSilUEevw5fUk7.exeCTS.exe

pid process

4308 fjSilUEevw5fUk7.exe
5056 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
4308	fjSilUEevw5fUk7.exe
5056	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_303a48219c6e6e216be49784de716d16_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_303a48219c6e6e216be49784de716d16_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_303a48219c6e6e216be49784de716d16_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3644 2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe
Token: SeDebugPrivilege 5056 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3644	2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe
Token: SeDebugPrivilege	5056	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe

description	pid	process	target process
PID 3644 wrote to memory of 4308	3644	2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe	fjSilUEevw5fUk7.exe
PID 3644 wrote to memory of 4308	3644	2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe	fjSilUEevw5fUk7.exe
PID 3644 wrote to memory of 5056	3644	2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe	CTS.exe
PID 3644 wrote to memory of 5056	3644	2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe	CTS.exe
PID 3644 wrote to memory of 5056	3644	2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_303a48219c6e6e216be49784de716d16_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3644

C:\Users\Admin\AppData\Local\Temp\fjSilUEevw5fUk7.exe
C:\Users\Admin\AppData\Local\Temp\fjSilUEevw5fUk7.exe
2⤵
- Executes dropped EXE
PID:4308

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:5056

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
395KB

MD5
3816e515578f8d88e529a89e284de248

SHA1
52075b80c863fc8d8036b21a19ab00f3cd892617

SHA256
03b170de7adb1716b2b88c58abdf3f31e3e5194eb41038633629cc7781c82daa

SHA512
68d86f4eff7a806437e61d713ef5b78121957db1625ab04087cd123fe959abfb930f1fa2dc722ea1588a9ab86663a1980edf527843bda70e65551e966a90dace

Download Submit
C:\Users\Admin\AppData\Local\Temp\fjSilUEevw5fUk7.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/4308-12-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

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