06f31221c84782e02b2604666fa7068b33996203ea8a0164d379f0a1586f0cd0

Analysis

max time kernel
67s
max time network
50s
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 19:35

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General

Target

2024-04-28_d956f665b861f33790f68309ece84f91_bkransomware.exe
Size

71KB
MD5

d956f665b861f33790f68309ece84f91
SHA1

0afc5f6706df84e60391b16e19d51844258636aa
SHA256

06f31221c84782e02b2604666fa7068b33996203ea8a0164d379f0a1586f0cd0
SHA512

12a534324df2b06dd03bdea97af4fb4534c4f49a4ae3698f74670d7d58d787cf43857b5b5c9ca6f504db05c67621e14ab768c9a8469d5a3f29ef00cd591edaf4
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTGF:ZRpAyazIliazTq

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4288 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
4288	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_d956f665b861f33790f68309ece84f91_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_d956f665b861f33790f68309ece84f91_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_d956f665b861f33790f68309ece84f91_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_d956f665b861f33790f68309ece84f91_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_d956f665b861f33790f68309ece84f91_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2060 2024-04-28_d956f665b861f33790f68309ece84f91_bkransomware.exe
Token: SeDebugPrivilege 4288 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_d956f665b861f33790f68309ece84f91_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2060	2024-04-28_d956f665b861f33790f68309ece84f91_bkransomware.exe
Token: SeDebugPrivilege	4288	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_d956f665b861f33790f68309ece84f91_bkransomware.exe

description	pid	process	target process
PID 2060 wrote to memory of 4288	2060	2024-04-28_d956f665b861f33790f68309ece84f91_bkransomware.exe	CTS.exe
PID 2060 wrote to memory of 4288	2060	2024-04-28_d956f665b861f33790f68309ece84f91_bkransomware.exe	CTS.exe
PID 2060 wrote to memory of 4288	2060	2024-04-28_d956f665b861f33790f68309ece84f91_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_d956f665b861f33790f68309ece84f91_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_d956f665b861f33790f68309ece84f91_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2060

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:4288

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

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Downloads

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

MD5
bcdb9d6f207fe276dd34b86c97829e90

SHA1
33bdb0ebf3692d1cfd601aee40991bd90742d187

SHA256
f868d1906c9a50dcb6f463a514b59bd69ab90c29b78aee2c9ce7ec70ac479780

SHA512
74cf6245674931a601501c193838f47c68795933ee84123316ece141456567b83cfa12e7ff9a7ce7ffa06279749fa2af4c72df99965da1fbb73dc3e70a935dcd

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C:\Users\Admin\AppData\Local\Temp\LUXyRhq3ZJd5X8O.exe
Filesize
71KB

MD5
8a2e108b292fa54212bcfb48551da5cf

SHA1
ddb6a0e2dea4810635554bc1b19c66e2cd7d843f

SHA256
08ca52ff72ecff5975747c71ccf52605004318abc95ce2b327a106aa02394126

SHA512
7e4bea5d74b8bcf6c355f6c63e79101e3cbbdfe7799601efbc393f2b818fb4983e69e820de398b7ecc0858c5821599fd06e2200dd382ce2e73aada005422702d

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit