a7842f5cc2ef2d179e90b1f12522ea4a3d649cb672d428bae53add3371fb67fc

Analysis

max time kernel
147s
max time network
149s
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 10:49

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General

Target

2024-04-28_24872400b453dc285ee96b25d0bc1544_bkransomware.exe
Size

76KB
MD5

24872400b453dc285ee96b25d0bc1544
SHA1

947b93cdbe088fdd6ae3ab75a9bf68e8bb3362c7
SHA256

a7842f5cc2ef2d179e90b1f12522ea4a3d649cb672d428bae53add3371fb67fc
SHA512

f13c8d66561b95688e0297ee378cfc4824cff1160c297a9f3edd0c4eb0f186f291ca13db024cf6ff65c58bdd9f6496537e96a6de656f19772f153a6d440af6cf
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazToQmWv9:ZhpAyazIlyazTIWv9

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4516 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
4516	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_24872400b453dc285ee96b25d0bc1544_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_24872400b453dc285ee96b25d0bc1544_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_24872400b453dc285ee96b25d0bc1544_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_24872400b453dc285ee96b25d0bc1544_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_24872400b453dc285ee96b25d0bc1544_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3904 2024-04-28_24872400b453dc285ee96b25d0bc1544_bkransomware.exe
Token: SeDebugPrivilege 4516 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_24872400b453dc285ee96b25d0bc1544_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3904	2024-04-28_24872400b453dc285ee96b25d0bc1544_bkransomware.exe
Token: SeDebugPrivilege	4516	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_24872400b453dc285ee96b25d0bc1544_bkransomware.exe

description	pid	process	target process
PID 3904 wrote to memory of 4516	3904	2024-04-28_24872400b453dc285ee96b25d0bc1544_bkransomware.exe	CTS.exe
PID 3904 wrote to memory of 4516	3904	2024-04-28_24872400b453dc285ee96b25d0bc1544_bkransomware.exe	CTS.exe
PID 3904 wrote to memory of 4516	3904	2024-04-28_24872400b453dc285ee96b25d0bc1544_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_24872400b453dc285ee96b25d0bc1544_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_24872400b453dc285ee96b25d0bc1544_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3904

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:4516

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
0eafa2e3fe65016ed21e59d621fb33f3

SHA1
3fafe2a04481cfff13206e624ad6fbe6ab797047

SHA256
1ef90c83c03e4dee134e7ebb88af0827f7f95036842387e1bf62bd44026fdb6e

SHA512
cce2bbdc301822941b39b78778f4e6ca972566f5566a6349fc57d968aa8a31e6acdf3ccbff6b128910664fba7b5d857056d7df34c5d009a1159256a4277b781c

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C:\Users\Admin\AppData\Local\Temp\fBXZK5DjCXBI5mp.exe

Filesize
76KB

MD5
50e90c21c058e5df9e6763885799fb43

SHA1
0e256de7c582b3f61c49f898bf6d81c3b52b65ac

SHA256
760da3b497f333cce5d07d2d9c0d175173a15ca16daaf67a75bbad3cb3736a14

SHA512
0edf4a10d4355e7bc3afcf67da08d68f90f60d4379c3b35d334296cb3cf2c0ca9f5faac195a077c07afca95e59564899e40ca3d647137250e3660a18a8b4556e

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C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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