00fcbc3fbd7a043cc79f98b5d3f6e3afb6e7b7d98dae5acd6448b9fdee5ea281

Analysis

max time kernel
66s
max time network
53s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-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

3964 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
3964	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:

2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exeCTS.exe

description ioc process

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

Processes:

2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4084 2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe
Token: SeDebugPrivilege 3964 CTS.exe

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

description	pid	process
Token: SeDebugPrivilege	4084	2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe
Token: SeDebugPrivilege	3964	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe

description	pid	process	target process
PID 4084 wrote to memory of 3964	4084	2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe	CTS.exe
PID 4084 wrote to memory of 3964	4084	2024-04-28_aea3c174f7584ee4861c2cd71651c867_bkransomware.exe	CTS.exe
PID 4084 wrote to memory of 3964	4084	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:4084

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:3964

Network

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
81eb1341d02d4172c6543303e69e662a

SHA1
f11042cfed025e51638e9b854fbf7bbc60a99830

SHA256
7734a6e15a18f0fa8517671d41b00b9476487462149c9aeb5162b575e8da9179

SHA512
6b36c30a63378e3a03916b1d764c9f1a72de62c1eaf6b860527c6560ee54a2a4425562bc6fe7badfd4a0e3b5967cb4e3910d84a94bb70261b659cbe2e4f78c64

Download Submit
C:\Users\Admin\AppData\Local\Temp\11CKl4CROg5Aw8F.exe
Filesize
71KB

MD5
b122551fabdd0655cd6468c3d54baca8

SHA1
4a75259de8ca9d99a0fc062d21dd2c278fe9019c

SHA256
863bfecfb976190e28e1f7f10ad1d1665ba78e3e40bc8d6a5097f419464a2b71

SHA512
323274d1bf7078ad5f77c534a6722bb35fdeb2941aa0298053311be0682965191ed5fe5b9f20d94ba87e46efeaab098af711870ad5987a2f66e0f650ccccef20

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit