6a91fe478db119300508b95a775d460b73785e4dbd6b048a23992ec3ac88449f

Analysis

max time kernel
51s
max time network
51s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
11-06-2024 22:30

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General

Target

2024-06-11_757ca758f3b8b7469033dc9f1cdb9a27_bkransomware.exe
Size

71KB
MD5

757ca758f3b8b7469033dc9f1cdb9a27
SHA1

0b1a37593337658abd6017319746d1f7fda21628
SHA256

6a91fe478db119300508b95a775d460b73785e4dbd6b048a23992ec3ac88449f
SHA512

fcd72c149578d5d5764d20de60f3f5ea7feeac4f5cf58c8a0e7d7136437e9536d2151118e97e540a5600a2376a1a743ab5bc4a12ab016f19fb9ce1c7d6df0d12
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTU:ZhpAyazIlyazTU

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
228	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"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-06-11_757ca758f3b8b7469033dc9f1cdb9a27_bkransomware.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-06-11_757ca758f3b8b7469033dc9f1cdb9a27_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4076	2024-06-11_757ca758f3b8b7469033dc9f1cdb9a27_bkransomware.exe
Token: SeDebugPrivilege	228	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4076 wrote to memory of 228	4076	2024-06-11_757ca758f3b8b7469033dc9f1cdb9a27_bkransomware.exe	82
PID 4076 wrote to memory of 228	4076	2024-06-11_757ca758f3b8b7469033dc9f1cdb9a27_bkransomware.exe	82
PID 4076 wrote to memory of 228	4076	2024-06-11_757ca758f3b8b7469033dc9f1cdb9a27_bkransomware.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-11_757ca758f3b8b7469033dc9f1cdb9a27_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-11_757ca758f3b8b7469033dc9f1cdb9a27_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4076
- 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:228

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\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
392KB

MD5
0a0ebf38bfd2b130cb1ffa0ee9c7db46

SHA1
6c9aed13e6fa232f4789f3aabc2484163e44f4e1

SHA256
6720e52e1c4a8886ff5d4d774645f477d7e397c76131798b2634dba16b89f186

SHA512
0849d79c475c2df8e21144677f8c30a5408821484ac627ebfcf69314282fadbf4511f443bc9c4952ec3a21c3aa2b3e2b83d72df2a5b80b6ad797677f3f19d5e2

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C:\Users\Admin\AppData\Local\Temp\YszcogeK6D1ScDH.exe

Filesize
71KB

MD5
ead990a781a020ffaea58834ec71dc6e

SHA1
28fed5b9c4d9ab358a82a1dc33ebe4a07815217a

SHA256
92cb3c235ec16724a751d26e180d8450de5c79ab41ab45bd49cbabc299f6b64b

SHA512
f1d1a054c92fb7bced8c29396f16eb7751e674bd1120508e8cee55431118936d584474b3735ed7b67bd4d8e4bba12f7916aeeee6e3f52c87b5ded5d297f0d96e

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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 Enterprise v15

Replay Monitor

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Downloads