8e40a1c2a6c88b03d501dbbf70b3930425674aa16d14c1b6d897fed813ca3169

Analysis

max time kernel
134s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 12:49

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General

Target

2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exe
Size

71KB
MD5

a59dea7caecf76edba19eefc36f687f0
SHA1

81bd244fccc9a6ffcfec48cad61fa4cae567b328
SHA256

8e40a1c2a6c88b03d501dbbf70b3930425674aa16d14c1b6d897fed813ca3169
SHA512

7af5bfd36271e5d495862a948ffba62dd868e9b9be74852c942e6dea5a510bb299c357c57b09af6e378427a60917f025eb1bb1bb4183b25a7c8d37f7434ada04
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTF:ZRpAyazIliazTF

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3360 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
3360	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_a59dea7caecf76edba19eefc36f687f0_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:

2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2252 2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exe
Token: SeDebugPrivilege 3360 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2252	2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exe
Token: SeDebugPrivilege	3360	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exe

description	pid	process	target process
PID 2252 wrote to memory of 3360	2252	2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exe	CTS.exe
PID 2252 wrote to memory of 3360	2252	2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exe	CTS.exe
PID 2252 wrote to memory of 3360	2252	2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_a59dea7caecf76edba19eefc36f687f0_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2252

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:3360

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
7fcd9f25cabefcad9c719f61ba947a7b

SHA1
c6baecf8060342f12f9b3cb9e7d9ec1af91a5c09

SHA256
abb9e851ee9c498f23b3cc50643b424e18be7119cea95586cd51f39d3781a810

SHA512
59455485061a95cfc49e73a4f80937d4b748682fb23c4f0c9ba2e9cb493a069f7f06d7c98c0be6fc2d266a72bd6d23420f5e58b3ee6b17b7af42ed11a573f08e

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C:\Users\Admin\AppData\Local\Temp\ecLr6jXsW2TOBgt.exe

Filesize
71KB

MD5
9e0d48bfdccf618cc9869b936c78468e

SHA1
a9a57be8f7e30dec62b65872f77f259e1e137b46

SHA256
5b4a57f39c681a4c8b45efe15e47aaf2ee345c59e8522a0f20aa32353c060efc

SHA512
e18c0345b62a4470220fd5121bc994eac0bc7af765c6911c855f757f77477fbbf7a21ad5c36adf2d05f7edfb897cf69c0bee1265a9bd3a8b8f7022cf25bdb884

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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