2f48fe50ce7a322942f8ae657eedfb263d7bb108c3cef9a37c62d576c5e5c593

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 07:49

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General

Target

2024-04-28_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exe
Size

71KB
MD5

a0e9c0ae6d195257cdd4a6cf1cc05598
SHA1

23bb95bec9937caeae4c735311dd272e703db55b
SHA256

2f48fe50ce7a322942f8ae657eedfb263d7bb108c3cef9a37c62d576c5e5c593
SHA512

b25e9c0881a64c04dab53f45087a5b549d153847be0561b0baa8e96ee21ded08cd48036e5cc96e2295a78cb1e4bb63a8fa74e9714750ed92982f352448831672
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTV:ZRpAyazIliazTV

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

508 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
508	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_a0e9c0ae6d195257cdd4a6cf1cc05598_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_a0e9c0ae6d195257cdd4a6cf1cc05598_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_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4640 2024-04-28_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exe
Token: SeDebugPrivilege 508 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4640	2024-04-28_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exe
Token: SeDebugPrivilege	508	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exe

description	pid	process	target process
PID 4640 wrote to memory of 508	4640	2024-04-28_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exe	CTS.exe
PID 4640 wrote to memory of 508	4640	2024-04-28_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exe	CTS.exe
PID 4640 wrote to memory of 508	4640	2024-04-28_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_a0e9c0ae6d195257cdd4a6cf1cc05598_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4640

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:508

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
392KB

MD5
23d473006c9649acc8b646c8680b4e61

SHA1
d229b55596dd556c9f1e9be0bbd3793188546516

SHA256
5d94b14c3f54aedd15f58a965eb2887d14cc6f9ede564526afae33c7eaf7d02a

SHA512
6b0b4657ae9b5cc8b88769b95683c5a4b13e9ec4528cb1e3265add348778ba62b8a734fff88675e6e9a5d0b123083e4ce59fc60e65d585cfd63e9cc4793efec6

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C:\Users\Admin\AppData\Local\Temp\818Qdj8depbrOi1.exe
Filesize
71KB

MD5
6269ec85ac94e36b81e71d50c4c020ce

SHA1
df8785ad0fdb3d67c452cfe617d1054e28119dd8

SHA256
c3cd8d7312f43d6cb0783d8cd1549ffc7705472677e9bc79a1d688d9578b187e

SHA512
6d9e4712490c62cb472f23a673eafd84b2b5a9a8e9e95c23faf0d0d50af399f02d2d364e40fc27370ecc8bd907d14569af121bb671ab64658d0afec6fe1c1bce

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit