676113e6889a3d42495deb705ebd3a82baf4a5d908f7e40f2ac291428b58516e

Analysis

max time kernel
133s
max time network
103s
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 11:54

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General

Target

2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe
Size

73KB
MD5

9cb9e394ab54a7f7c83d85fbe2e4c784
SHA1

5d57356c08d88dd63a98e6f3858438537ac352f2
SHA256

676113e6889a3d42495deb705ebd3a82baf4a5d908f7e40f2ac291428b58516e
SHA512

68872278376ef56362e8783ee95df6636ddd3cbbd320a5066e7caad1178bd583b0604382a104c5e20aa70a141da9ee5ce0a6ea3d1a6025a0e57ad89eb4d0086f
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazToFP:ZRpAyazIliazToZ

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2580 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
2580	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

CTS.exe2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2628 2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe
Token: SeDebugPrivilege 2580 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2628	2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe
Token: SeDebugPrivilege	2580	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe

description	pid	process	target process
PID 2628 wrote to memory of 2580	2628	2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe	CTS.exe
PID 2628 wrote to memory of 2580	2628	2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe	CTS.exe
PID 2628 wrote to memory of 2580	2628	2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_9cb9e394ab54a7f7c83d85fbe2e4c784_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2628

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:2580

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
392KB

MD5
7626ddf004b504ab2c01a1022c4867c5

SHA1
de5cae6ea207807a402e743cc6b224f932726931

SHA256
a38e62736efc683bfc363078f84baabc8612d0dd9a37495958e3cd135a2420ff

SHA512
db6b9cdaf58d4cef11c3433690043a1e4884c7890f78ace2a8e7f7585d3870abbb5ec7af794a71753ce17eaf360dea6d7623a9dfd13e8b3d4de37aa733616589

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C:\Users\Admin\AppData\Local\Temp\jZR9V2vcl1jyP0V.exe

Filesize
73KB

MD5
45a33475095989b0574c3568fbc311ea

SHA1
9105dda1ef58d265c92548b6aed36db7be4dc021

SHA256
e38ad920f2a1d1296fe334c2f4d831dbd6541dc0cc36e5fc67b1cd85e969c4e9

SHA512
6c84281b27ddbf4c058d638474f9c6725e4e19fd9c57a507edcbaa69e2a4f86cf7af3e73866c1c1f1a17df7bc999eb52629826db8e4e51d5593821b68f088bfb

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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