d3707a23551226fa6b421be51685a547f535bdc8b45b58fa702fb561bfacd432

Analysis

max time kernel
131s
max time network
100s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
17/05/2024, 13:31

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General

Target

2024-05-17_70bf7b0f1877f7c6053726654774b745_bkransomware.exe
Size

96KB
MD5

70bf7b0f1877f7c6053726654774b745
SHA1

eefdca82dd9f0c8ac1f5a327ef95f6d341b2eb39
SHA256

d3707a23551226fa6b421be51685a547f535bdc8b45b58fa702fb561bfacd432
SHA512

c68d3d1702fc6ffe0055d64ffc2bebcd0f977cb76f78dfd168a63e8ce5ba5dd1b62878c7e291caf8ea197f49a89a796d4184290a17e3efab8b19562e6f35ef81
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTrh5KVKzxm7Cn:ZRpAyazIliazTrhd9m7Cn

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1284	SK5UPTjMVfQpElt.exe
4744	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"	2024-05-17_70bf7b0f1877f7c6053726654774b745_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	2024-05-17_70bf7b0f1877f7c6053726654774b745_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1972	2024-05-17_70bf7b0f1877f7c6053726654774b745_bkransomware.exe
Token: SeDebugPrivilege	4744	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1284	1972	2024-05-17_70bf7b0f1877f7c6053726654774b745_bkransomware.exe	83
PID 1972 wrote to memory of 1284	1972	2024-05-17_70bf7b0f1877f7c6053726654774b745_bkransomware.exe	83
PID 1972 wrote to memory of 4744	1972	2024-05-17_70bf7b0f1877f7c6053726654774b745_bkransomware.exe	85
PID 1972 wrote to memory of 4744	1972	2024-05-17_70bf7b0f1877f7c6053726654774b745_bkransomware.exe	85
PID 1972 wrote to memory of 4744	1972	2024-05-17_70bf7b0f1877f7c6053726654774b745_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-17_70bf7b0f1877f7c6053726654774b745_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-17_70bf7b0f1877f7c6053726654774b745_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Users\Admin\AppData\Local\Temp\SK5UPTjMVfQpElt.exe
  C:\Users\Admin\AppData\Local\Temp\SK5UPTjMVfQpElt.exe
  2⤵
  - Executes dropped EXE
  PID:1284
- 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:4744

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
bd08b9ca8e1baf0d69a7d19115d1a047

SHA1
6a65daadcf7b388e717c88d3467069d6bebd97b5

SHA256
c63d614da7aa5e5f597bc0eb6901a0c680f4acdd6e72d6b7f35b7a613a5d9e1d

SHA512
b374558d31ef0139a930038fe5be1eb87653625c761e2b4f90530a542695b35c3066a5809b71be283be700b71d134c3f17f7dbe97f4f5fb962c28517e1354f0a

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C:\Users\Admin\AppData\Local\Temp\SK5UPTjMVfQpElt.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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memory/1284-11-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads