ff75a73a7a841d20cc79927bde6adbcaa52a907804de14406ffba7683d20fa00

Analysis

max time kernel
147s
max time network
150s
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 10:49

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General

Target

2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe
Size

214KB
MD5

2810f130f7c9476332d676d4269800ca
SHA1

01b2955d41b5668c1b01ad4acd820c237e3f0ba6
SHA256

ff75a73a7a841d20cc79927bde6adbcaa52a907804de14406ffba7683d20fa00
SHA512

764e73aee1e595682dd3c8d1d77c0cee408235c775b9aced46e430e1575929d0a21c36a03ac13dfa86bb870588408e602f182e72f8e7a86b890613668e281e28
SSDEEP

6144:xZ8azvnv4dXkMBVJYsVG/OGygj4WAW0ms:xC0fakMBVOyLEj4M0B

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

BHCjwU2xIizu0WN.exeCTS.exe

pid process

2056 BHCjwU2xIizu0WN.exe
4288 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
2056	BHCjwU2xIizu0WN.exe
4288	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_2810f130f7c9476332d676d4269800ca_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_2810f130f7c9476332d676d4269800ca_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_2810f130f7c9476332d676d4269800ca_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2340 2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe
Token: SeDebugPrivilege 4288 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2340	2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe
Token: SeDebugPrivilege	4288	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe

description	pid	process	target process
PID 2340 wrote to memory of 2056	2340	2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe	BHCjwU2xIizu0WN.exe
PID 2340 wrote to memory of 2056	2340	2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe	BHCjwU2xIizu0WN.exe
PID 2340 wrote to memory of 4288	2340	2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe	CTS.exe
PID 2340 wrote to memory of 4288	2340	2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe	CTS.exe
PID 2340 wrote to memory of 4288	2340	2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_2810f130f7c9476332d676d4269800ca_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2340

C:\Users\Admin\AppData\Local\Temp\BHCjwU2xIizu0WN.exe
C:\Users\Admin\AppData\Local\Temp\BHCjwU2xIizu0WN.exe
2⤵
- Executes dropped EXE
PID:2056

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:4288

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
392KB

MD5
f908b5945f02cec07c408bcb5d05da64

SHA1
42c7a14e58b1de395c1a5ebf869823a48855cfad

SHA256
c22e1461d4c1c90107247aefc8072c3977d645dce2ed5877fb5deccd1783a24e

SHA512
4cff6b4f2def345d7ff37f9e0b889a7f989d4c081569670529e1bf0719fe16bf4d0ec292acedb749e57738c0a3e0c9a2adb76e59ef3c46c9851e028950a8f402

Download Submit
C:\Users\Admin\AppData\Local\Temp\BHCjwU2xIizu0WN.exe

Filesize
143KB

MD5
c1d5e48111f4984433e6318466ee1bce

SHA1
d3379a99f504b38794f491e4fff6c77cfab53eac

SHA256
dfdf187874d7368a92bbebb68c8cdc5c183af47d954b5b27ddaeca6774ae4822

SHA512
dfce97a9dc92521c2d576b3d21071cb04df4a6d927676a2b95abc0093b67a044aab8d3f8612a4a70f9128cf2555d3a554a1c3f941647a64d30298ab28bba7441

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
memory/2056-13-0x00000000004C0000-0x00000000004E8000-memory.dmp

Filesize
160KB

Download
memory/2056-20-0x00007FF896300000-0x00007FF896DC1000-memory.dmp

Filesize
10.8MB

Download
memory/2056-31-0x00007FF896300000-0x00007FF896DC1000-memory.dmp

Filesize
10.8MB

Download