26bf5b3b634c6cc10907b2bf9d0e018bd4c5da983276fb4059527a138e5b7a05

Analysis

max time kernel
55s
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
27-04-2024 22:31

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General

Target

2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe
Size

96KB
MD5

55fa45af8114e00b1f93d483d8f38830
SHA1

8cf8f15c10546fdfa1a26a4143adcd803274e883
SHA256

26bf5b3b634c6cc10907b2bf9d0e018bd4c5da983276fb4059527a138e5b7a05
SHA512

81eb52590250f2ed7e179f02ac1216e9fedd3013d5563490613b4d4d94c9b6561982622f9d038ef271e774be2273f89be9e3fc911bfd5635e96c6e3c89a3ff7d
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTMUdytRPFP/Ag3jMq8cmHD:ZRpAyazIliazTMnRP5/A0wq81

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

3NJuCtijZDXZtwr.exeCTS.exe

pid process

4756 3NJuCtijZDXZtwr.exe
4608 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
4756	3NJuCtijZDXZtwr.exe
4608	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-27_55fa45af8114e00b1f93d483d8f38830_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:

2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4016 2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe
Token: SeDebugPrivilege 4608 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4016	2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe
Token: SeDebugPrivilege	4608	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe

description	pid	process	target process
PID 4016 wrote to memory of 4756	4016	2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe	3NJuCtijZDXZtwr.exe
PID 4016 wrote to memory of 4756	4016	2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe	3NJuCtijZDXZtwr.exe
PID 4016 wrote to memory of 4608	4016	2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe	CTS.exe
PID 4016 wrote to memory of 4608	4016	2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe	CTS.exe
PID 4016 wrote to memory of 4608	4016	2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_55fa45af8114e00b1f93d483d8f38830_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4016

C:\Users\Admin\AppData\Local\Temp\3NJuCtijZDXZtwr.exe
C:\Users\Admin\AppData\Local\Temp\3NJuCtijZDXZtwr.exe
2⤵
- Executes dropped EXE
PID:4756

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:4608

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
bea5d45fb104adbb6e2b15d5278fb5ff

SHA1
4fd91da9058ff6f748b0360699c96a5e59e148e7

SHA256
a6a0cabecd3effa280d369a6a283d86c7c61a1d1636e174658052f0e123a6ea1

SHA512
68a59acf3a44b10e287950da0f3b9c1b5726e5664230a8e2af54f9ef73a4eb2f002c8737922e0f1597fac4dfd37b253ca0c53d8350ee2cf7bb41fe4d1215a483

Download Submit
C:\Users\Admin\AppData\Local\Temp\3NJuCtijZDXZtwr.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/4756-11-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads