140221814ff959affcdb3768ecf67a6618ab056adf6f02d32ea843f71a028650

Analysis

max time kernel
67s
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 14:53

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General

Target

2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe
Size

96KB
MD5

d37b7b5edcfd9d48094e08b0e146839f
SHA1

cfc047e1c5c82533c221c90c052ff7bdf330f3f1
SHA256

140221814ff959affcdb3768ecf67a6618ab056adf6f02d32ea843f71a028650
SHA512

858c7236c0c00dcfae21bf00190115cd7c74629182688923fa3ee3bfa057c73676747d0aa5d680b047b37f563700b8bef4b7cab5182b19f2468f5f45e083fdca
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTUpTQ+QFw3N/1:ZhpAyazIlyazTUf9N

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

bwb8sbrDh6vdxZD.exeCTS.exe

pid process

116 bwb8sbrDh6vdxZD.exe
4460 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
116	bwb8sbrDh6vdxZD.exe
4460	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_d37b7b5edcfd9d48094e08b0e146839f_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_d37b7b5edcfd9d48094e08b0e146839f_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_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4744 2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe
Token: SeDebugPrivilege 4460 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4744	2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe
Token: SeDebugPrivilege	4460	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe

description	pid	process	target process
PID 4744 wrote to memory of 116	4744	2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe	bwb8sbrDh6vdxZD.exe
PID 4744 wrote to memory of 116	4744	2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe	bwb8sbrDh6vdxZD.exe
PID 4744 wrote to memory of 4460	4744	2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe	CTS.exe
PID 4744 wrote to memory of 4460	4744	2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe	CTS.exe
PID 4744 wrote to memory of 4460	4744	2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_d37b7b5edcfd9d48094e08b0e146839f_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4744

C:\Users\Admin\AppData\Local\Temp\bwb8sbrDh6vdxZD.exe
C:\Users\Admin\AppData\Local\Temp\bwb8sbrDh6vdxZD.exe
2⤵
- Executes dropped EXE
PID:116

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:4460

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
394KB

MD5
65c345a5c1b60dbf38255dad80480dc2

SHA1
53ddaa6e1dfc3f5f248be46756c7bd47b7e3f070

SHA256
735ae7fb9df96d40066dbfdd35a5f2eb15f96d31565e2c7fe441fd8c383e4951

SHA512
41218e56a1b39c032b7f46c660fc329fa010185a9f8091c8b531259b020a3cfbfc7a4de60bb06ddebab22acbe22fe0a905ce903e72b62b6d338dd585d9970f64

Download Submit
C:\Users\Admin\AppData\Local\Temp\bwb8sbrDh6vdxZD.exe
Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

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

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/116-14-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download