a866ac6a9730ca33291d2e54a5a42ba170512e0a7d5c72db67818b5316a68c17

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
01/05/2024, 13:46

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General

Target

2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe
Size

71KB
MD5

5e5e54dd46b67c7716ca25261b03d1f9
SHA1

eeee30a15fb173a19b0df4d5b40c2bc7357b1aa0
SHA256

a866ac6a9730ca33291d2e54a5a42ba170512e0a7d5c72db67818b5316a68c17
SHA512

c07401672f21ac844a45e25bddf07cf3d65a18eca5fba6dc6b0c84b108fecff229560b403b30458e6ed8ae66cafb4f2e23ac10a672dcf8e9a2947b8f1304b0bb
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT7:ZRpAyazIliazT7

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2724	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"	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_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	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1660	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe
Token: SeDebugPrivilege	2724	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1660 wrote to memory of 2724	1660	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe	28
PID 1660 wrote to memory of 2724	1660	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe	28
PID 1660 wrote to memory of 2724	1660	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe	28
PID 1660 wrote to memory of 2724	1660	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1660
- 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:2724

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\Temp\4bcuSjCKx107BWd.exe

Filesize
71KB

MD5
4750c5b9c7e40a39066e6a418c70b1d1

SHA1
6d4783e0c91a747338664c9ef199d345f9fc31c8

SHA256
1effaffe0011bc49cfbd37cbfd7450e93b1941fde02881de57a0da3efd81d939

SHA512
c6593173205712886bf1f03c3986804110c69941bdd214c9d735d5250814f5f8bdb0a4834484fbdfb535ee5018f3809a6d32e90247859e05030e6264ff6923e5

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

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Downloads