4a9eec14633026561afb6957de0cbe6d3af9b03f44b4ed902d974d2372297bd6

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 21:01

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General

Target

2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe
Size

214KB
MD5

5a48bcb96d6c4ab8a0dcf64258987fab
SHA1

4ca37c6cfbf90ad6da24e0d99dc24cbe98cc5493
SHA256

4a9eec14633026561afb6957de0cbe6d3af9b03f44b4ed902d974d2372297bd6
SHA512

e337981b4761e43922e38c5bf3fd3925e27f1815f9a0cbf2be7a9fc20f214d347f6889bdc5cc572cb9ee8a41659c4065341293c01ef0aba2e542115431421063
SSDEEP

6144:hZMazT0LKL9BalCBDDQIMtcpKpBjQM7j729:hS0wLKx2J/SpKLjQqj7S

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

x5HC6gP8e11MZ6b.exeCTS.exe

pid process

1020 x5HC6gP8e11MZ6b.exe
776 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
1020	x5HC6gP8e11MZ6b.exe
776	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_5a48bcb96d6c4ab8a0dcf64258987fab_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_5a48bcb96d6c4ab8a0dcf64258987fab_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_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3488 2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe
Token: SeDebugPrivilege 776 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3488	2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe
Token: SeDebugPrivilege	776	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe

description	pid	process	target process
PID 3488 wrote to memory of 1020	3488	2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe	x5HC6gP8e11MZ6b.exe
PID 3488 wrote to memory of 1020	3488	2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe	x5HC6gP8e11MZ6b.exe
PID 3488 wrote to memory of 776	3488	2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe	CTS.exe
PID 3488 wrote to memory of 776	3488	2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe	CTS.exe
PID 3488 wrote to memory of 776	3488	2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_5a48bcb96d6c4ab8a0dcf64258987fab_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3488

C:\Users\Admin\AppData\Local\Temp\x5HC6gP8e11MZ6b.exe
C:\Users\Admin\AppData\Local\Temp\x5HC6gP8e11MZ6b.exe
2⤵
- Executes dropped EXE
PID:1020

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:776

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
394KB

MD5
b4570c204cf5925f01a52b3d8bda8e21

SHA1
d1cb6d8ba4deeac3737c27510bee9dd774fcad7c

SHA256
1d7baad77b2d95c7f1d5c33f4d5d61948b512621db3987960771b6faac9b8943

SHA512
358425bfc8c6354abdec9e848a2fa7317318e5ae76f0e0573a265b693e6cc6fbdf1b55dade7568170c9683950e6649457553619dbaa49fa92300fc9d06c0c1db

Download Submit
C:\Users\Admin\AppData\Local\Temp\x5HC6gP8e11MZ6b.exe
Filesize
143KB

MD5
2fdb371d45181dff59577110ba1064e2

SHA1
42a5833cb0ac90e38d734d1327bb3f7c7a6aa453

SHA256
80d7ec8ce3913d81ea5d4f304b8609e56f0e49778c52af9279e742ea54f4a155

SHA512
52982041ba9ca552b90b79b251501ec6c33c5251d09ca9969a1b179af2ec17aca6eb81db6e588e12751bcea04208e1da8d5a754a979dd98ceb3f50780aadea20

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/1020-14-0x0000000000BE0000-0x0000000000C08000-memory.dmp

Filesize
160KB

Download
memory/1020-21-0x00007FFA95280000-0x00007FFA95D41000-memory.dmp

Filesize
10.8MB

Download
memory/1020-32-0x00007FFA95280000-0x00007FFA95D41000-memory.dmp

Filesize
10.8MB

Download