5134dfd26c4f1b93c680a63db6d6920918e344b0507653753c37bf8af6a3be34

Analysis

max time kernel
66s
max time network
54s
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 18:46

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General

Target

2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe
Size

214KB
MD5

4035f73a48da99faa334a8f5d71698a9
SHA1

c57575681716ede981ac8c6ebe943dd0d1173912
SHA256

5134dfd26c4f1b93c680a63db6d6920918e344b0507653753c37bf8af6a3be34
SHA512

9b631236ac712cdfd5078eac24778b884d26d12153f247a15f6335e1dd741734409b106d960a1045281fc5627470b588c05b82ea66676709c92ca29dd1507edc
SSDEEP

3072:ZhpAyazIlyazTDB8DBxmksRcGWbLBrwQewCt2uLm8sSdjMypPXJkC1n6f:hZMazpujmk+a2tjq8ZgypN6f

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

8aLcLIVMR3CupLT.exeCTS.exe

pid process

4620 8aLcLIVMR3CupLT.exe
4368 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
4620	8aLcLIVMR3CupLT.exe
4368	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_4035f73a48da99faa334a8f5d71698a9_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_4035f73a48da99faa334a8f5d71698a9_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:

CTS.exe2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe

description ioc process

File created C:\Windows\CTS.exe CTS.exe
File created C:\Windows\CTS.exe 2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2944 2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe
Token: SeDebugPrivilege 4368 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe

description	pid	process
Token: SeDebugPrivilege	2944	2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe
Token: SeDebugPrivilege	4368	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe

description	pid	process	target process
PID 2944 wrote to memory of 4620	2944	2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe	8aLcLIVMR3CupLT.exe
PID 2944 wrote to memory of 4620	2944	2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe	8aLcLIVMR3CupLT.exe
PID 2944 wrote to memory of 4368	2944	2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe	CTS.exe
PID 2944 wrote to memory of 4368	2944	2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe	CTS.exe
PID 2944 wrote to memory of 4368	2944	2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_4035f73a48da99faa334a8f5d71698a9_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2944

C:\Users\Admin\AppData\Local\Temp\8aLcLIVMR3CupLT.exe
C:\Users\Admin\AppData\Local\Temp\8aLcLIVMR3CupLT.exe
2⤵
- Executes dropped EXE
PID:4620

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:4368

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
28d593ccf8118244560823df1dec44aa

SHA1
df70927533d26f24f0dcb3d10f2ab1b7bab955f7

SHA256
3e8594db1885a009b64d153657c30221ba88e1b041ce9b48e39d84973e4e103d

SHA512
5ae1550c4324f927a02ce52d9bba489ff9d74adb73db3b76ab8ca88da98fd26c67368c3b8de340de659fd77c00c7fc78e156948d02ca9e380cea46eac3cf45c2

Download Submit
C:\Users\Admin\AppData\Local\Temp\8aLcLIVMR3CupLT.exe
Filesize
143KB

MD5
b27ea830fb39bc056e65f9a2260ae216

SHA1
b69e40ee5cabe0721d2d1e9fbdd4088fd87592d6

SHA256
fb7fab836f744d669451dcd38aa7d2a9c74c6af893c258d079439b58abce70d8

SHA512
22cad79d90a949174828ee5e3ce621113591c7c991c55c1a6a44a4555002adeb3bcbd9bab6cfbbfdefd663b76ac2dae96d70a01c527b312c7e8d223334a30219

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

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/4620-11-0x0000000000890000-0x00000000008B8000-memory.dmp

Filesize
160KB

Download
memory/4620-23-0x00007FFF6E0A0000-0x00007FFF6EB61000-memory.dmp

Filesize
10.8MB

Download
memory/4620-32-0x00007FFF6E0A0000-0x00007FFF6EB61000-memory.dmp

Filesize
10.8MB

Download