351c7e4f08b76d1b2a54249c670046bb3fe332cba286603ea6c20d1e194bfbed

Analysis

max time kernel
66s
max time network
53s
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 04:32

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General

Target

2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe
Size

214KB
MD5

353b5e1da9e9898c161c020964a02398
SHA1

185029c8792e452cb0dc87f877114d7708716d1b
SHA256

351c7e4f08b76d1b2a54249c670046bb3fe332cba286603ea6c20d1e194bfbed
SHA512

91d85dac114d3356196a33a33b91cf2ae41a84e6fbe59340de131c16f84b5e4ee08fc703cef867fea1988b107bbaa3f7f2badaa062e6ff304fc1d8a40748018a
SSDEEP

3072:ZRpAyazIliazTgvFiPDEtK+WP9HRX2lTfBh8JTUr40aiJ67fleIQswR8vbOd:xZ8azakP/+qB2lrB6N3iJAMT

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

nl7UgNxquh0cAmf.exeCTS.exe

pid process

4516 nl7UgNxquh0cAmf.exe
4796 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
4516	nl7UgNxquh0cAmf.exe
4796	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_353b5e1da9e9898c161c020964a02398_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_353b5e1da9e9898c161c020964a02398_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_353b5e1da9e9898c161c020964a02398_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4776 2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe
Token: SeDebugPrivilege 4796 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4776	2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe
Token: SeDebugPrivilege	4796	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe

description	pid	process	target process
PID 4776 wrote to memory of 4516	4776	2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe	nl7UgNxquh0cAmf.exe
PID 4776 wrote to memory of 4516	4776	2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe	nl7UgNxquh0cAmf.exe
PID 4776 wrote to memory of 4796	4776	2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe	CTS.exe
PID 4776 wrote to memory of 4796	4776	2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe	CTS.exe
PID 4776 wrote to memory of 4796	4776	2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_353b5e1da9e9898c161c020964a02398_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4776

C:\Users\Admin\AppData\Local\Temp\nl7UgNxquh0cAmf.exe
C:\Users\Admin\AppData\Local\Temp\nl7UgNxquh0cAmf.exe
2⤵
- Executes dropped EXE
PID:4516

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:4796

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

Replay Monitor

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Downloads

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

MD5
d4c62b1204f84482a926f430e9f16f12

SHA1
aabdc06ed98657f45a9783ad4b7f51c703f1352a

SHA256
74bb210bcbfb5eb83748ed87f375b374227475789a5ed3405f81dff5f7a96ef6

SHA512
f4c95a660fb13523280df45de763ebd8a772aa717b60745285b7a3cad159139c18656a95f8a405178c922c518355525d649995e14934953ae07519ccbe7aadaf

Download Submit
C:\Users\Admin\AppData\Local\Temp\nl7UgNxquh0cAmf.exe
Filesize
143KB

MD5
2fdb371d45181dff59577110ba1064e2

SHA1
42a5833cb0ac90e38d734d1327bb3f7c7a6aa453

SHA256
80d7ec8ce3913d81ea5d4f304b8609e56f0e49778c52af9279e742ea54f4a155

SHA512
52982041ba9ca552b90b79b251501ec6c33c5251d09ca9969a1b179af2ec17aca6eb81db6e588e12751bcea04208e1da8d5a754a979dd98ceb3f50780aadea20

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

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
memory/4516-12-0x00000000004B0000-0x00000000004D8000-memory.dmp

Filesize
160KB

Download
memory/4516-22-0x00007FFAD5290000-0x00007FFAD5D51000-memory.dmp

Filesize
10.8MB

Download
memory/4516-32-0x00007FFAD5290000-0x00007FFAD5D51000-memory.dmp

Filesize
10.8MB

Download