7681cba6912a74387ae4bf5a3b2a1c6d91f55211c8b4c0c3ccc1b134675c2d22

Analysis

max time kernel
66s
max time network
55s
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 04:35

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General

Target

2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe
Size

96KB
MD5

4b072564d101007f7e728132f338aa2e
SHA1

006ff4794f89c246974f925042b3f5fc6238f943
SHA256

7681cba6912a74387ae4bf5a3b2a1c6d91f55211c8b4c0c3ccc1b134675c2d22
SHA512

052c5cf1e989016baf812ece70f6b94a4298ff6df209f51e05c3e1b141f85aecf880854e0433e8d09a7f9d61b3c80920f1bb2ffcb4c00fcc509ae17ddf6ce315
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTen6ymMvvLgF6nL5d7saND:ZRpAyazIliazTe62n62dYk

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

6lEN6M7hv0bqUW3.exeCTS.exe

pid process

1952 6lEN6M7hv0bqUW3.exe
4896 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
1952	6lEN6M7hv0bqUW3.exe
4896	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_4b072564d101007f7e728132f338aa2e_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_4b072564d101007f7e728132f338aa2e_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_4b072564d101007f7e728132f338aa2e_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3440 2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe
Token: SeDebugPrivilege 4896 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3440	2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe
Token: SeDebugPrivilege	4896	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe

description	pid	process	target process
PID 3440 wrote to memory of 1952	3440	2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe	6lEN6M7hv0bqUW3.exe
PID 3440 wrote to memory of 1952	3440	2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe	6lEN6M7hv0bqUW3.exe
PID 3440 wrote to memory of 4896	3440	2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe	CTS.exe
PID 3440 wrote to memory of 4896	3440	2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe	CTS.exe
PID 3440 wrote to memory of 4896	3440	2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_4b072564d101007f7e728132f338aa2e_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3440

C:\Users\Admin\AppData\Local\Temp\6lEN6M7hv0bqUW3.exe
C:\Users\Admin\AppData\Local\Temp\6lEN6M7hv0bqUW3.exe
2⤵
- Executes dropped EXE
PID:1952

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:4896

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
2be60f79253d665db9b55cacfd9ed943

SHA1
74449e32a2e88e96d346bba1ed611dd6c88836c5

SHA256
360b4e99fe6e9d99925c4fecdf1c9e704d8404d3258298b020745f5442dbfb3a

SHA512
d460ff8fb36425697ca76e546595052d361eda3bc461bd152a3bbab970d756c32c4d6a8d175f2ea26d482410a6fdb62e7982382d5d0c341f15b924179d6d5612

Download Submit
C:\Users\Admin\AppData\Local\Temp\6lEN6M7hv0bqUW3.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/1952-10-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

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