72b9c995ece99c2f1d2327664ade881275c863c1125cea3312d706ea143062a7

Analysis

max time kernel
133s
max time network
101s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
05/05/2024, 04:41

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General

Target

2024-05-05_090e23a53b766958eb9f283932ea287a_bkransomware.exe
Size

71KB
MD5

090e23a53b766958eb9f283932ea287a
SHA1

33ff8fa3608909ab1e24fb3c8edae34d65d766c7
SHA256

72b9c995ece99c2f1d2327664ade881275c863c1125cea3312d706ea143062a7
SHA512

ce2fe5370850af341fa523a8c7b51374655c49f101d7f74a0634e266039f87304bd87a809215e63a874e8518e7a1243460968e879d92318f681442f45f82767e
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTU:ZRpAyazIliazTU

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3896	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"	2024-05-05_090e23a53b766958eb9f283932ea287a_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	2024-05-05_090e23a53b766958eb9f283932ea287a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3812	2024-05-05_090e23a53b766958eb9f283932ea287a_bkransomware.exe
Token: SeDebugPrivilege	3896	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3812 wrote to memory of 3896	3812	2024-05-05_090e23a53b766958eb9f283932ea287a_bkransomware.exe	84
PID 3812 wrote to memory of 3896	3812	2024-05-05_090e23a53b766958eb9f283932ea287a_bkransomware.exe	84
PID 3812 wrote to memory of 3896	3812	2024-05-05_090e23a53b766958eb9f283932ea287a_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-05_090e23a53b766958eb9f283932ea287a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-05_090e23a53b766958eb9f283932ea287a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3812
- 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:3896

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
392KB

MD5
079d83df23114985a08437ddb1fd1389

SHA1
e66117a349d2018833755dd946723300f060cd52

SHA256
53ec17a2f6ffe042f498cee350f4a09bd3157e5adb189fb6ae8d6e2819b2ca19

SHA512
e21fc9ea8fa21ea178d44f9755ead65e3d6c829670b795a885fd66a69b27cb2d9bcf3b27820ffa3d62d1f8fcb8948fba30eb26bd022f53469acb9a69e6649aa8

Download Submit
C:\Users\Admin\AppData\Local\Temp\Ko4V7jUh2RCHe4K.exe

Filesize
71KB

MD5
360f6b3fef6d92b457497dd5ad733273

SHA1
7a8c50704bc7b677c6eecb182829b6be93cede12

SHA256
40751ff77317b5d3134292760b10ee92c77b1b43df69fee1e5e87c72cd1507be

SHA512
5f7ac7ed6343b6a7d64c270bf0c1685dfb4a9bafcffa3ec32f8ff24b8dc1438af915a874ec2592dc04f852c5e58a76032926ad609555bb701ba08d36f3a11b08

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads