f2372222fd942e936440bffa37b90c323ada6989d9826b59d06ef3d8836527ab

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 10:07

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General

Target

2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe
Size

96KB
MD5

6fede314144929bb68f7f1811a418c00
SHA1

8349d6cf26827e8070a9fe03533b7370a7fbc18e
SHA256

f2372222fd942e936440bffa37b90c323ada6989d9826b59d06ef3d8836527ab
SHA512

b57cf846b19c980b419edb26cb7f483fbfa18f8d1b31cffd45434f1b45248e2e971171aa19e4c5f38dbf1361b18e53c5d99377e679c32d1d55342b3ff4f8acfc
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTlmLRm7TYN5JjMyURNjkjV:ZRpAyazIliazTmRyYHFME

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

Du6o9dZw0q66KkC.exeCTS.exe

pid process

932 Du6o9dZw0q66KkC.exe
748 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
932	Du6o9dZw0q66KkC.exe
748	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_6fede314144929bb68f7f1811a418c00_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_6fede314144929bb68f7f1811a418c00_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_6fede314144929bb68f7f1811a418c00_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1508 2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe
Token: SeDebugPrivilege 748 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1508	2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe
Token: SeDebugPrivilege	748	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe

description	pid	process	target process
PID 1508 wrote to memory of 932	1508	2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe	Du6o9dZw0q66KkC.exe
PID 1508 wrote to memory of 932	1508	2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe	Du6o9dZw0q66KkC.exe
PID 1508 wrote to memory of 748	1508	2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe	CTS.exe
PID 1508 wrote to memory of 748	1508	2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe	CTS.exe
PID 1508 wrote to memory of 748	1508	2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_6fede314144929bb68f7f1811a418c00_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1508

C:\Users\Admin\AppData\Local\Temp\Du6o9dZw0q66KkC.exe
C:\Users\Admin\AppData\Local\Temp\Du6o9dZw0q66KkC.exe
2⤵
- Executes dropped EXE
PID:932

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:748

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

Replay Monitor

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Downloads

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

MD5
df10364be13fa2c8eb50fbe3a1d334ef

SHA1
9428dfa78658c767b4da84e63ef9cfdea148c410

SHA256
ade602ee7f48751f7424b809a9cea234feee3653b4f53923e2cb9bedf71cd5c8

SHA512
c50506edc498bf62613b10ef8721b08e55f5507e70a6aedbaf854271268779d29aa6a0a064992c56dc6f7f5ea0eef5b928afd697ed47032adb6eff7cfe80714b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Du6o9dZw0q66KkC.exe
Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

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

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
memory/932-10-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download