8ff06101ea1ff74b44fb41fe369bc6c071f7f7ff081676b538bd06f5dc7632a1

Analysis

max time kernel
66s
max time network
54s
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 05:28

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General

Target

2024-04-28_420635441a6a865683f2644ac72339c7_bkransomware.exe
Size

249KB
MD5

420635441a6a865683f2644ac72339c7
SHA1

5142e10f82d34b8cfe4a89ded5c61c51f150e427
SHA256

8ff06101ea1ff74b44fb41fe369bc6c071f7f7ff081676b538bd06f5dc7632a1
SHA512

3f9553a6c83121388b18101eb61ab92618f3b5f07e894ae56932287707c2f78e2fffd655ebdcc729b08e95eeee963493ccb36c4b85c856c79ceb766202a4a6cb
SSDEEP

3072:ZRpAyazIliazTISf+C6YQhQBI6PDIvhdRxEkBTl78QVSabls3KADWd5WJoq2w:xZ8az1mQQ+IFXQeTlbHs3KACiJoqN

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4620 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
4620	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_420635441a6a865683f2644ac72339c7_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_420635441a6a865683f2644ac72339c7_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_420635441a6a865683f2644ac72339c7_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_420635441a6a865683f2644ac72339c7_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_420635441a6a865683f2644ac72339c7_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3292 2024-04-28_420635441a6a865683f2644ac72339c7_bkransomware.exe
Token: SeDebugPrivilege 4620 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_420635441a6a865683f2644ac72339c7_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3292	2024-04-28_420635441a6a865683f2644ac72339c7_bkransomware.exe
Token: SeDebugPrivilege	4620	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_420635441a6a865683f2644ac72339c7_bkransomware.exe

description	pid	process	target process
PID 3292 wrote to memory of 4620	3292	2024-04-28_420635441a6a865683f2644ac72339c7_bkransomware.exe	CTS.exe
PID 3292 wrote to memory of 4620	3292	2024-04-28_420635441a6a865683f2644ac72339c7_bkransomware.exe	CTS.exe
PID 3292 wrote to memory of 4620	3292	2024-04-28_420635441a6a865683f2644ac72339c7_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_420635441a6a865683f2644ac72339c7_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_420635441a6a865683f2644ac72339c7_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3292

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:4620

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

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Downloads

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

MD5
be4f1d992c546a756b73f2627d215754

SHA1
f58384042209bcb62c704f33816260f777f1272d

SHA256
fae42d2fec79786271541b236ad0c08cc036d465551204941d8b1afc8a2a7b3a

SHA512
bdfd8047119694d2fc3f6be7018529ab4efca3c877066819b837039ab0d2a91ccc3d9ee7588238f4ec42ce3dd5c6f31b6f52e485c6abdadff463623846e12904

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C:\Users\Admin\AppData\Local\Temp\zXmUiOh9nXz354Q.exe
Filesize
249KB

MD5
8a4f2cfdce9bd1fd9aab84dde2db93a4

SHA1
7f56ad37ef5db7bfc006938e8fc0e89186373b0b

SHA256
265ad707f8e36f6fa70479b6f701ebb0b8d00f85bb0450d2fd343f3aea36fe16

SHA512
0419f37c87e0904c011441498111b6c6b22fdf4dc72dcbf50d61173437e74d0ac73cab1668f6f7050cac00ff3725a8ee645e4dc54d2a21ac563b0e3344439c2b

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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