a7ca1e4f4997c6d4a6411335cbf65aeb21fa34fd4842d3248c8a552e8e2d6fab

Analysis

max time kernel
95s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 18:50

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General

Target

2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe
Size

214KB
MD5

6f99d7b0949bf3f1d4c354973dee791b
SHA1

7d51f4560811cc55abf640ca45c9bed8e80a6fcb
SHA256

a7ca1e4f4997c6d4a6411335cbf65aeb21fa34fd4842d3248c8a552e8e2d6fab
SHA512

ac220d92390194a0ea59da72a15c66d8fa6be879a10271015386389283c9a79fec28efd4ab67273a4f34f82836b95ce3ca9ffb16c7f625d0c28dc5c1f2d1affd
SSDEEP

6144:xZ8azQmYAJlUsU6CcQDJZ2CsHW8wXlRbN0ErwaO:xC0pH/jCBj2fHWrXbFnO

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

KTtHsbSWiVN1U8g.exeCTS.exe

pid process

3292 KTtHsbSWiVN1U8g.exe
2036 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
3292	KTtHsbSWiVN1U8g.exe
2036	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_6f99d7b0949bf3f1d4c354973dee791b_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_6f99d7b0949bf3f1d4c354973dee791b_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_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3828 2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe
Token: SeDebugPrivilege 2036 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3828	2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe
Token: SeDebugPrivilege	2036	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe

description	pid	process	target process
PID 3828 wrote to memory of 3292	3828	2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe	KTtHsbSWiVN1U8g.exe
PID 3828 wrote to memory of 3292	3828	2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe	KTtHsbSWiVN1U8g.exe
PID 3828 wrote to memory of 2036	3828	2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe	CTS.exe
PID 3828 wrote to memory of 2036	3828	2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe	CTS.exe
PID 3828 wrote to memory of 2036	3828	2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_6f99d7b0949bf3f1d4c354973dee791b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3828

C:\Users\Admin\AppData\Local\Temp\KTtHsbSWiVN1U8g.exe
C:\Users\Admin\AppData\Local\Temp\KTtHsbSWiVN1U8g.exe
2⤵
- Executes dropped EXE
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:2036

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
75dfaf51fcc1228e01fe7671019753c9

SHA1
f36e05f217f38f567d4a933747025af9c7f1ba2c

SHA256
c3b41bd522e035d9ac106cf39201fe6f1304afd178d11b6c9f70be7c3dffa878

SHA512
a6f006d4540a39f9278e66193e6898c5b6be1f437f1d8c3f72e80794e43d30eeae7f7c16175f5a995f9318e0064d1612c7262ac04cf02ddcf4feacdf8cefe9b2

Download Submit
C:\Users\Admin\AppData\Local\Temp\KTtHsbSWiVN1U8g.exe
Filesize
143KB

MD5
c583d768336377e263ed3de978da7c6e

SHA1
2c48977d57dfe983781ae622056588233d7d67ee

SHA256
54836a96884e0e9b30b1ff5b3ece61ce17dd472a4b09137296cd7915ec4a0fac

SHA512
284adabd0b025057d4f43e860b9cb64fd9505439c658cf011b87fcce5b15c6d6ebeae1134373c48401b559bdb465e882798127edb7c0fbbba59f225f85150b93

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

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
memory/3292-13-0x0000000000680000-0x00000000006A8000-memory.dmp

Filesize
160KB

Download
memory/3292-24-0x00007FFB57090000-0x00007FFB57B51000-memory.dmp

Filesize
10.8MB

Download
memory/3292-32-0x00007FFB57090000-0x00007FFB57B51000-memory.dmp

Filesize
10.8MB

Download