449ce51e0407a5fbbdb2f12a6aaefd55c737440aaecf126d326ee6933583aca8

Analysis

max time kernel
149s
max time network
151s
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 18:59

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General

Target

2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe
Size

144KB
MD5

ba3458134c36049a67847db908eb51dd
SHA1

6d77fb9827c24ebabeaaf4b3ce2c4cd23bde9a4d
SHA256

449ce51e0407a5fbbdb2f12a6aaefd55c737440aaecf126d326ee6933583aca8
SHA512

590220f248b92f210ad365538e5d383385266a4c4eaf79b8172b5d7e9f8ef9a7e6e022cefcd78986a4630f6ae68444665d043bed35da148fef876dab6f4d5fe6
SSDEEP

3072:ZRpAyazIliazTfRIjdDNU+SccHq/0QiOPYI+x:xZ8azzRkfYQD4x

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

t7C9VFOHLnfN1nH.exeCTS.exe

pid process

3556 t7C9VFOHLnfN1nH.exe
4016 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
3556	t7C9VFOHLnfN1nH.exe
4016	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

CTS.exe2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe

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"	2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 812 2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe
Token: SeDebugPrivilege 4016 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	812	2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe
Token: SeDebugPrivilege	4016	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe

description	pid	process	target process
PID 812 wrote to memory of 3556	812	2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe	t7C9VFOHLnfN1nH.exe
PID 812 wrote to memory of 3556	812	2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe	t7C9VFOHLnfN1nH.exe
PID 812 wrote to memory of 4016	812	2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe	CTS.exe
PID 812 wrote to memory of 4016	812	2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe	CTS.exe
PID 812 wrote to memory of 4016	812	2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_ba3458134c36049a67847db908eb51dd_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:812
- C:\Users\Admin\AppData\Local\Temp\t7C9VFOHLnfN1nH.exe
  C:\Users\Admin\AppData\Local\Temp\t7C9VFOHLnfN1nH.exe
  2⤵
  - Executes dropped EXE
  PID:3556
- 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:4016

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
0799ac87afe50e086b27ac04dd0ac302

SHA1
a082d4a83d8ca2dcd53651a05cebd19e662b9c81

SHA256
3a7c76489813fb7430453aa208466259494cb38c906605183021131ae4c32fa5

SHA512
47a32cc4aab46cd9d53d9cc8b2f08ae05c70e27237d84c487ee2cbeaf915a77b73b0bd53e69c64180354295e93a8caa0bb018726b7fa5cc0400824891f81b584

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C:\Users\Admin\AppData\Local\Temp\t7C9VFOHLnfN1nH.exe

Filesize
73KB

MD5
d2778164ef643ba8f44cc202ec7ef157

SHA1
31eee7114eed6b0d2fb77c9f3605057639050786

SHA256
28b001bb9a72ae7a24242bfab248d767a1ac5dec981c672a3944f7a072375e9a

SHA512
cb2a5a2aeba9d6f6bfc4a3a4576961244c109aafb59f02134b03ebac4d16602ee7f141cc4adc519f15030c20e7e7d6585778870706b2ea4c74c1161729101635

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit