a87e038267ad53af1667b1b916551f6187025dd5003636037b48efd1528ca143

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
28-04-2024 19:30

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General

Target

2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe
Size

71KB
MD5

82539b818249f926538925b85e154b84
SHA1

885227b6b251405989062ef25a41a0f1b5c5fa5a
SHA256

a87e038267ad53af1667b1b916551f6187025dd5003636037b48efd1528ca143
SHA512

37599def62590d6bc731c6eb153ab4488739d4dac822d968a81a1ca05d5a47b0c4c520a990644db55f29ca007ee54e446f32e63fff4670a69e26d52938587df8
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTq5f:ZhpAyazIlyazTq5f

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3064 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

pid	process
3064	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_82539b818249f926538925b85e154b84_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

Processes:

2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2996 2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe
Token: SeDebugPrivilege 3064 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2996	2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe
Token: SeDebugPrivilege	3064	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe

description	pid	process	target process
PID 2996 wrote to memory of 3064	2996	2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe	CTS.exe
PID 2996 wrote to memory of 3064	2996	2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe	CTS.exe
PID 2996 wrote to memory of 3064	2996	2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe	CTS.exe
PID 2996 wrote to memory of 3064	2996	2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_82539b818249f926538925b85e154b84_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2996
- 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:3064

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\xMTTNSN7VHb95GS.exe

Filesize
71KB

MD5
94d05ef74dcdb547d9833125a8159168

SHA1
6a1b47e88462fcfaff48087de68f176b780aca05

SHA256
da05e1047fe97f4310960ae8dc93e7846322ef1598784a9d721cff70b0df4959

SHA512
be6e7792637da0d4040f794f57d3d77c68fc3c916cd82ad0503af5dc927c5be5b438bc29648a76a35da64c8a31e975ef6fd0c34e8579466f46cd9c37001caf7f

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit