fb2f60148e7abc328515313b4eab43b841164d76212641d821a5ffc65bde0463

Analysis

max time kernel
132s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:42

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General

Target

2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe
Size

71KB
MD5

8711fdc59c26eac3fce8923e38ce9d18
SHA1

fceddd73c2c75773f227177db7754ea64d1a1d36
SHA256

fb2f60148e7abc328515313b4eab43b841164d76212641d821a5ffc65bde0463
SHA512

26146997148b4008eda6cccf0a0c43cda598c9d6fb4d46c723d87291983760f85a5fa708c019d78ffa2b8bcbd11f8aadecb7d547becfa56cde69ad285c3e4793
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTL:ZRpAyazIliazTL

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3796 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
3796	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

CTS.exe2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1292 2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe
Token: SeDebugPrivilege 3796 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1292	2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe
Token: SeDebugPrivilege	3796	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe

description	pid	process	target process
PID 1292 wrote to memory of 3796	1292	2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe	CTS.exe
PID 1292 wrote to memory of 3796	1292	2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe	CTS.exe
PID 1292 wrote to memory of 3796	1292	2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_8711fdc59c26eac3fce8923e38ce9d18_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1292

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:3796

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

Replay Monitor

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Downloads

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

Filesize
394KB

MD5
d4d6f088fa6394471e086bfdbd9081dd

SHA1
24de60cb93f1ea1e78921e902430a10ebaa220fc

SHA256
897e630faa3a73a914805ebd9bdc5c8b36862a1b2fa1495014a5da5ea5675dea

SHA512
592db02259d11082fa869b63628651ce25afbada1e863afff3ae141e332c8fab129fc20edd02dbd77c13a727a5dbc50ce8826a441518a49d3900de498b25df21

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C:\Users\Admin\AppData\Local\Temp\4Qa6hE4HnCgJaxp.exe

Filesize
71KB

MD5
1d947ed56a37a3169d8c7a7b615f3e57

SHA1
8617e0f23c62a8e399e86131b217bae7a494c2cd

SHA256
3b62e5fd12ec692a297fd136f6cdaa613385670b0f554cbd61de10e56f1daf69

SHA512
a40f65e533d3bcf0602baa0b4e07cb9ed5ee1b4cb035962ff9e3319b690cae428caf717b059a20dc4dab3c77293d87a9fbc1f6f51db42ba86cb4ae54c935411f

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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