aaf7ecddaef55eda35ed659247b80cbb72ba83d38e8ea4c04e8b201252036ae2

Analysis

max time kernel
55s
max time network
55s
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 19:27

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General

Target

2024-04-28_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exe
Size

71KB
MD5

48c4bcff25a8e36a8fa92d2fd2c36a6e
SHA1

a5dac4c65371e6e159c3f9261140684745834bd7
SHA256

aaf7ecddaef55eda35ed659247b80cbb72ba83d38e8ea4c04e8b201252036ae2
SHA512

4212da433b291211656caa966947e712fdb9e894bb633c0d0e1c20a514cb000792b3a4a3932ca7c60efd71f1064ea5ef9014ca1c97bc7b8686aeed3fe9d292db
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTd:ZhpAyazIlyazTd

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3892 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
3892	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_48c4bcff25a8e36a8fa92d2fd2c36a6e_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_48c4bcff25a8e36a8fa92d2fd2c36a6e_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_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1944 2024-04-28_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exe
Token: SeDebugPrivilege 3892 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1944	2024-04-28_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exe
Token: SeDebugPrivilege	3892	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exe

description	pid	process	target process
PID 1944 wrote to memory of 3892	1944	2024-04-28_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exe	CTS.exe
PID 1944 wrote to memory of 3892	1944	2024-04-28_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exe	CTS.exe
PID 1944 wrote to memory of 3892	1944	2024-04-28_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_48c4bcff25a8e36a8fa92d2fd2c36a6e_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1944

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:3892

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\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
682f99a704fde4429d63c0dd3db9f6ce

SHA1
5998b9e3b71ecda99a671f5e2a6a4578afe1b888

SHA256
344cde15afe97ed9d65ab0ea2d28c282b628ce86d1626f7b3caedbd8f4fb9e76

SHA512
c7b7c7768eed659cb92bee15c419c4c9b77da0fd2c360468306026b862b7cfea73700cfad38b64b57c7d1a26cd49752c3541261efa5e5a57b9ad4a76e0d16000

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C:\Users\Admin\AppData\Local\Temp\MBG8Hk15MyirCjJ.exe
Filesize
71KB

MD5
b3246dbbcbf0b00d5015a8275a92ee0b

SHA1
ea771d582853e5272942864b320940cdc597ef74

SHA256
2e7678d60f7d7cc94394e9a9ed70475e89e6f087fc841adc0d740f3fd4d888a6

SHA512
f952efb26b0ea2f7fca6882e368f7007877e33b2b449a78a0739879a5803eaed069944a54c2d0f008d0993645ab129ceca16ba01800945b7f4a4469b73692cc0

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads