258f37a762151c23752a0e61f1acb89d726275633c69b82a6d9f2140a0e6b948

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 14:24

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General

Target

2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe
Size

96KB
MD5

0f867c3ce1c998c463388fd48a949996
SHA1

6e6ed7d5ed5febaa83b7312a7f556619359c3777
SHA256

258f37a762151c23752a0e61f1acb89d726275633c69b82a6d9f2140a0e6b948
SHA512

eea499cc7bde30a4b4c70273cd95cef9723ae1e64f6d336a3835a83ef626c104edb88e54b8578e3b9db1667d93cb5fa8e19219fcc8eb38cde4d013f176d803c0
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTXy9QdpS4KKgNIuhRwh:ZRpAyazIliazTXeQ7S4fgtDwh

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

HQ60PVvEzDrcWwZ.exeCTS.exe

pid process

4900 HQ60PVvEzDrcWwZ.exe
1504 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
4900	HQ60PVvEzDrcWwZ.exe
1504	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.exe2024-04-28_0f867c3ce1c998c463388fd48a949996_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"	2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4596 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe
Token: SeDebugPrivilege 1504 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4596	2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe
Token: SeDebugPrivilege	1504	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe

description	pid	process	target process
PID 4596 wrote to memory of 4900	4596	2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe	HQ60PVvEzDrcWwZ.exe
PID 4596 wrote to memory of 4900	4596	2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe	HQ60PVvEzDrcWwZ.exe
PID 4596 wrote to memory of 1504	4596	2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe	CTS.exe
PID 4596 wrote to memory of 1504	4596	2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe	CTS.exe
PID 4596 wrote to memory of 1504	4596	2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4596

C:\Users\Admin\AppData\Local\Temp\HQ60PVvEzDrcWwZ.exe
C:\Users\Admin\AppData\Local\Temp\HQ60PVvEzDrcWwZ.exe
2⤵
- Executes dropped EXE
PID:4900

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:1504

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
02b040ed910212ccf118cca263ba8087

SHA1
49775c237d3b5c4848599740208c9ffe09f1336d

SHA256
f1e25bd3924ebdd4c25adfbf9f4b1faef755ad1c32000d241e5ead8021849479

SHA512
001bcce106e28278e7641c6bce7f9efb7d4a2bb458cb2d3010e73d3db89fb8eff17b77c2dc4bba672f459368a4da4ebc3b946dfb409c4ff83be01bf0dca9ed77

Download Submit
C:\Users\Admin\AppData\Local\Temp\HQ60PVvEzDrcWwZ.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/4900-12-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download