aa7ba767eddc92eb05c97623c5c0c0a4c5e016b8ae59743806e10dc116265710

Analysis

max time kernel
92s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10/05/2024, 16:30

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General

Target

2024-05-10_bb67884c73f0b65bca139475e0dc1b08_bkransomware.exe
Size

71KB
MD5

bb67884c73f0b65bca139475e0dc1b08
SHA1

4d6be9a72ff864a081679f6c120555887c136fea
SHA256

aa7ba767eddc92eb05c97623c5c0c0a4c5e016b8ae59743806e10dc116265710
SHA512

bea877b21a9bf34be743478284659184608f7c52b575e4fb9b7b6a2648b582caca016bf5ff5c17ac5903ccc353d5605aef017420099b0787726a640a23f3c66c
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTt:ZhpAyazIlyazTt

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4388	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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-10_bb67884c73f0b65bca139475e0dc1b08_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

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-05-10_bb67884c73f0b65bca139475e0dc1b08_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	452	2024-05-10_bb67884c73f0b65bca139475e0dc1b08_bkransomware.exe
Token: SeDebugPrivilege	4388	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 452 wrote to memory of 4388	452	2024-05-10_bb67884c73f0b65bca139475e0dc1b08_bkransomware.exe	82
PID 452 wrote to memory of 4388	452	2024-05-10_bb67884c73f0b65bca139475e0dc1b08_bkransomware.exe	82
PID 452 wrote to memory of 4388	452	2024-05-10_bb67884c73f0b65bca139475e0dc1b08_bkransomware.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-10_bb67884c73f0b65bca139475e0dc1b08_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_bb67884c73f0b65bca139475e0dc1b08_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:452
- 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:4388

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
0ee741beb60db80b58e065c7a9813d23

SHA1
0d5ad1b64e5f1a1ecf6b5d8acba112212005493c

SHA256
d8d3cb183770053ea4628b0ff722a731fb4ed149974ff4aaf570c9170cbfcc21

SHA512
44ce1176af2606714e42fcb7ea033af9bc8d2389593a1a8fcb4ec49c210eed71d54d6ba338f9c9070aca863fa8f9bbad7d29993e7b076dbe68ac52a96f55218f

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C:\Users\Admin\AppData\Local\Temp\mqGRvkmmg4AKXTG.exe

Filesize
71KB

MD5
6d95ed8bebfcb89bf157302c290e2e28

SHA1
046b0d97bf6085f32e1027536491fa3c622bda48

SHA256
183d50a9c822b16aca2ba21ba35330045586c8e2277fd6d89e6f9fc80b11947b

SHA512
2341b754cee6a5276de0a43c70924e2f93b508f1b8a47dfc2f8db2e3d131d6c0447153fae2d095707c5022050cbaaec7d808150e2c185e19621b144a24c62ac0

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads