06d6584f45c5204cf03d122f344f333b8a0562872a3dc1ad9260d4595ca605c5

Analysis

max time kernel
134s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
04/06/2024, 00:49

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General

Target
2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe
Size 71KB
Sample240604-a6j5csgb29
SHA256 06d6584f45c5204cf03d122f344f333b8a0562872a3dc1ad9260d4595ca605c5
MD5 7f7b563cc77e13904ee0314a725cd083
SHA1 08f89112dfdbdb88257d8320846d864b48e9048a
SHA512 97728b54f71e8c419b1702e963e13de011271893d4ac1f41ec6439b71d8414019d77204cdbf9f453245bd3c8d2bd2cd79c559a8d93541d6849e9b65035f12087
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT0:ZRpAyazIliazT0
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4584	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"	2024-06-04_7f7b563cc77e13904ee0314a725cd083_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	2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4800	2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe
Token: SeDebugPrivilege	4584	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4800 wrote to memory of 4584	4800	2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe	90
PID 4800 wrote to memory of 4584	4800	2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe	90
PID 4800 wrote to memory of 4584	4800	2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_7f7b563cc77e13904ee0314a725cd083_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4800
- 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:4584

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4604,i,16710585221322798697,8586257254049248207,262144 --variations-seed-version --mojo-platform-channel-handle=1304 /prefetch:8
1⤵
PID:3140

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

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 392KB
SHA256 d6f4769042940c40da5ed3fb5d943ae07c733f5594291d6a7a5f61ddd1833618
MD5 97bfd814f0f1f26d5004e9d0ec1c1525
SHA1 ffdafdc6931b4793f678d2a6641f7a0bf39c147a
SHA512 85ab141eb76ee006699cd6d42db1dd809a98e80d3f6defd1c213501d2afc20114089d35cbd8a59044b0b329b7fa35e5919cc347c76317392dd2ddb21bc05ecd5
SSDEEP 6144:xZ8az4lgIn81xeFURAylB6xmFOb5VynU//P72y8Eeq4jMkLEhCM3+vPPMMb:xC04lgI8WG76xIOVVynU/HHjeM38Pz
MD5 SHA1 SHA512 SSDEEP

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6KP7BEPXN1hJuxa.exe

Path C:\Users\Admin\AppData\Local\Temp\6KP7BEPXN1hJuxa.exe
Size 71KB
SHA256 ad074e25969b956b25f1b58b7342831649bdefb48a6157609bbe8bf96668c295
MD5 eb6e6e8eede8917ac7635e58800412cc
SHA1 e1b940548e4b903fb466a2926c6f7691956a774a
SHA512 da3ec78b165d759b4e9d94b81e9dbefc71ce4216fe5c33fd84d8a56d48d05c3f60660b259555c90a423ac289860dd011693b3415d23735e26acb028a9fa5bc92
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTX:ZRpAyazIliazTX
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT:ZRpAyazIliazT
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads