00fcbc3fbd7a043cc79f98b5d3f6e3afb6e7b7d98dae5acd6448b9fdee5ea281

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
28-04-2024 19:32

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General

Target

2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe
Size

71KB
MD5

aea3c174f7584ee4861c2cd71651c867
SHA1

cafd1a9718f048c02945a3a4f2060307e86d02dd
SHA256

00fcbc3fbd7a043cc79f98b5d3f6e3afb6e7b7d98dae5acd6448b9fdee5ea281
SHA512

5a1a8ac2b04739d57f39a640097d91b6e7b2dde10beb0ffd49eaaa491e2b55da503199e3e9dd2d18b0fc8ce8fab83cab598b0e8ac527a8fbf68dde006f476ec4
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT9:ZhpAyazIlyazT9

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

852 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
852	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_aea3c174f7584ee4861c2cd71651c867_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_aea3c174f7584ee4861c2cd71651c867_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:

CTS.exe2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe

description ioc process

File created C:\Windows\CTS.exe CTS.exe
File created C:\Windows\CTS.exe 2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2308 2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe
Token: SeDebugPrivilege 852 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe

description	pid	process
Token: SeDebugPrivilege	2308	2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe
Token: SeDebugPrivilege	852	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe

description	pid	process	target process
PID 2308 wrote to memory of 852	2308	2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe	CTS.exe
PID 2308 wrote to memory of 852	2308	2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe	CTS.exe
PID 2308 wrote to memory of 852	2308	2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe	CTS.exe
PID 2308 wrote to memory of 852	2308	2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2308

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:852

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\AvYZSuQGBhPBTXO.exe
Filesize
71KB

MD5
d425797e8a39f0b8278d9afec515bfa4

SHA1
478349bc26f4d2af3ea236ee5b3896b6dbafaecb

SHA256
aa58dbcb7d8aa162a86c3e7c745c4b08f897fcf28c810499876cc255b46f7b92

SHA512
d9061fc11b9ba801d067cc97d531e0c3b7dc9636e9ae405701ad8880a1a647e49ccb45c99cd3ee219199e9d05e294b8e31c4b604a4eeb05b3701347ed66bd6dc

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads