1538a9f3d9c0e52ee6cc52b39a2e97ca721471d3317851ec401e0edbbe35aa79

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05/06/2024, 07:23

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General

Target

2024-06-05_0664c11fee663fddf2d7c9c5c73f6125_bkransomware.exe
Size

71KB
MD5

0664c11fee663fddf2d7c9c5c73f6125
SHA1

2e8e73f81d6514e8c4cdfee533462ebfedc81e83
SHA256

1538a9f3d9c0e52ee6cc52b39a2e97ca721471d3317851ec401e0edbbe35aa79
SHA512

db0fda24422eec7956fb23ebd4a0bc7c7f6726f2c1cc99ea2db4b0814d5180139e9199c3ea9d22eee9aaba8ec74d8d633313bc07907b24bc3ebef4563a88f2a3
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTJ:ZRpAyazIliazTJ

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
224	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"	2024-06-05_0664c11fee663fddf2d7c9c5c73f6125_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	2024-06-05_0664c11fee663fddf2d7c9c5c73f6125_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3252	2024-06-05_0664c11fee663fddf2d7c9c5c73f6125_bkransomware.exe
Token: SeDebugPrivilege	224	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3252 wrote to memory of 224	3252	2024-06-05_0664c11fee663fddf2d7c9c5c73f6125_bkransomware.exe	83
PID 3252 wrote to memory of 224	3252	2024-06-05_0664c11fee663fddf2d7c9c5c73f6125_bkransomware.exe	83
PID 3252 wrote to memory of 224	3252	2024-06-05_0664c11fee663fddf2d7c9c5c73f6125_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-05_0664c11fee663fddf2d7c9c5c73f6125_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-05_0664c11fee663fddf2d7c9c5c73f6125_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3252
- 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:224

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
65e37def0a49a44391374a4ab9a19b53

SHA1
2b3f7f5113fef3a51e63fe92727badb6f7f8604f

SHA256
6fe00ea422e4bee85c56ba2da68156bbc63e0b4b149bd905b6b40aff234d73fd

SHA512
42fcf4d7d1b12dc3cade0805a74b676fbe064a08e6cb11b83ce5c351e6f106ef06d52dcb4aec3a60110dbb3e0777ca3bdaeb95df2b2a4b5b67e8a78eebe7c28e

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C:\Users\Admin\AppData\Local\Temp\hdWK7sn4Cp9xXHy.exe

Filesize
71KB

MD5
98d895aa1fbd5517f33af7a90c06d143

SHA1
cf46f411f4ca4dcb36dce4d64f019c96a028d5e8

SHA256
d45a32c2300bf730e6a870fd75e949b8ecd9df84db1c8c870181729eb5dbf787

SHA512
747db441936a0059453dc82b6a8a0dc5d30e2dbb0d363f7f56d21eb55e66e9fb7716722723cbbac9049409e17ff435f336e7737add11ade59ec8ac5a3fbf0e59

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads