9665ffbe036b6b4d6cf6e02b38b50cb5efd4af90d56eed0c13b0ebd325f8c94f

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
27-05-2024 06:36

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General

Target

2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
Size

71KB
MD5

aca7b8ee0d6846564ad083cd3758902a
SHA1

18ad718453dc5c34e0002470084511b839a46f54
SHA256

9665ffbe036b6b4d6cf6e02b38b50cb5efd4af90d56eed0c13b0ebd325f8c94f
SHA512

26bae61277fd814ea17c907b49153d579856c1844593824f6303c153209c8c1ac72e75640c3a46c31d39459fb195ce872db77a3c7ab893eb0ed761bc8ce3a1d5
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTe:ZRpAyazIliazTe

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1712 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
1712	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_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:

2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1704 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
Token: SeDebugPrivilege 1712 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1704	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
Token: SeDebugPrivilege	1712	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe

description	pid	process	target process
PID 1704 wrote to memory of 1712	1704	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe	CTS.exe
PID 1704 wrote to memory of 1712	1704	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe	CTS.exe
PID 1704 wrote to memory of 1712	1704	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe	CTS.exe
PID 1704 wrote to memory of 1712	1704	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1704

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:1712

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\Temp\fYy7CTZTJXiEx5I.exe

Filesize
71KB

MD5
6688793da019bfec061abe082e1eaa94

SHA1
8a42a8a56b870797094cde70442b0f50c4e85f67

SHA256
8c4dea29d3c2cb88bbb45f19f8c2416da400dc860e319cedabc7fbe3a2606f74

SHA512
a98ccb63ada216071afd4bbb3b491a43d493cfaf391392053ba4e2d5f72055eb82445a7563832a1c250a01df5c04955b171d8e2b62a1458ccf716b58817b3ce5

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit