9a542017148924bcaf18f0033a66544a4ffc6e75020f09d878c3b9dee216c607

Analysis

max time kernel
150s
max time network
150s
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, 04:28

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General

Target
2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe
Size 235KB
Sample240428-e37hpsga84
SHA256 9a542017148924bcaf18f0033a66544a4ffc6e75020f09d878c3b9dee216c607
MD5 30c1860f9f8f87f9a716edb7613f5df0
SHA1 3743441324963c979a5e5df778f59e2a2f90b52f
SHA512 ac973eec26605f053a62d5393062bdf76c6ccee2812de5b1dc94c101181bf4c5b1c264698f59bbccae0039ca930c98cd795c3449bfa3abcdb7070afd3992445c
SSDEEP 6144:xZ8azD1D3zw478TuuCB0WjQB/MYhxzsPUbK:xC0Z3w47UumWQ7scbK
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4568	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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_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

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2968	2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe
Token: SeDebugPrivilege	4568	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 4568	2968	2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe	81
PID 2968 wrote to memory of 4568	2968	2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe	81
PID 2968 wrote to memory of 4568	2968	2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_30c1860f9f8f87f9a716edb7613f5df0_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2968
- 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:4568

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

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 392KB
SHA256 42643cb05f018345d7fdfa5d4a1fe7b5f615cb12adb7b49bcaece347ff14cd09
MD5 5612d40823b54b1a65c9fae0dc34425e
SHA1 32219a6048ea1f265c99e265b82e0d23e89d5d6d
SHA512 1b9b9dfdf34f50decab19679dac61fbcd0278be108b83f2e9b645df31afdbe1e7abb542e75d26935334a006b50fd495f8c564e821cffd4db28af7e90036f6ca6
SSDEEP 12288:xC0upZkOZCZswLtHLLLmT1EUgOJ/FlubE71F:Dw5CZ3LtH/LKLgWF/1F
MD5 SHA1 SHA512 SSDEEP

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OuRYmUXUaDhdaT8.exe

Path C:\Users\Admin\AppData\Local\Temp\OuRYmUXUaDhdaT8.exe
Size 235KB
SHA256 5ed6e6321607b15ccd733f1c89a4dbc1167e47b522da587da208d5b0d9a38673
MD5 ea98e6ac6509971903fa2bfedee65557
SHA1 8fef2831663d94d9e87aeabfcbfa160eeab53146
SHA512 9340a564a853583eb9ab851bd31023812c95399fecbeb25ef76f3d4725aa9ac5df85b1d7e66be3322439901c123f97bc59d4b6010d1c6643c9e55dd32eed8537
SSDEEP 3072:ZRpAyazIliazTW299C2Mhzw2Gcb1qy8PA5x99PtU6bS98r8KbOoECZLwT6HSN6l:xZ8azx9lMhMGt8PI3PtXbSiAKGYMaSNE
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT:ZRpAyazIliazT
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads