a32b8e880db00391bfe393156ebabda9739e3c584138975f047fa97d1743b71a

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
27/04/2024, 10:13

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General

Target

2024-04-27_45e927ddb6438ae542715cab26a97794_bkransomware.exe
Size

71KB
MD5

45e927ddb6438ae542715cab26a97794
SHA1

86377251423ecb0fa6a9722dae7d4b9c07614f66
SHA256

a32b8e880db00391bfe393156ebabda9739e3c584138975f047fa97d1743b71a
SHA512

803055882f95fbc6028f09d363ca42c18ea39fd1c44e582137db65263af3169eb6d31c628478fb605db605589a6818274b51284fadfcfeb59b9e7eedfedfe72f
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT4:ZRpAyazIliazT4

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2468	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"	2024-04-27_45e927ddb6438ae542715cab26a97794_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	2024-04-27_45e927ddb6438ae542715cab26a97794_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4728	2024-04-27_45e927ddb6438ae542715cab26a97794_bkransomware.exe
Token: SeDebugPrivilege	2468	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4728 wrote to memory of 2468	4728	2024-04-27_45e927ddb6438ae542715cab26a97794_bkransomware.exe	80
PID 4728 wrote to memory of 2468	4728	2024-04-27_45e927ddb6438ae542715cab26a97794_bkransomware.exe	80
PID 4728 wrote to memory of 2468	4728	2024-04-27_45e927ddb6438ae542715cab26a97794_bkransomware.exe	80

C:\Users\Admin\AppData\Local\Temp\2024-04-27_45e927ddb6438ae542715cab26a97794_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_45e927ddb6438ae542715cab26a97794_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4728
- 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:2468

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
f6a8e56320c9ab210fa4c545474d8226

SHA1
4339d4d7a0f086f30fb456916fe840d93cfb1662

SHA256
73758f2a248dc28935434bb39447a1cf8241f63308a4c7fa8c26785c2fdbb519

SHA512
551e0d2b78ce4e2c3c79b6db7cf35b0f6925f587cbcfadd1244888c7dbd0e953a6e1c55d065b3ca6732425a143932689e92e3c1a383ad17d58678a6a1cc8f114

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C:\Users\Admin\AppData\Local\Temp\CRXoJ2IP07vT3KS.exe

Filesize
71KB

MD5
183287dedf81880b452f1208de2011d9

SHA1
d85b51b69af72959401561fc40e02117454d51c3

SHA256
d1830b62c01da04e6510c81340495c1ceb72759444668509fc240b2933006acd

SHA512
a0f2ebd921076ab3ceec5cdb20dca7602172003a06ec87d2d3bd58dc8bd27795a20b47cdac95db04de06ac1432f147af90d1ac1327d4c1cac5368e9e3324a8e3

Download Submit
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

Replay Monitor

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Downloads