4b6ec354e2b5762b42fbd692a2126e1f6a3a216cd5c1a32df7ca377d59acabf7

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
04/10/2024, 15:26

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General

Target

2024-10-04_3de038aa04235403167cde0f8d5812c2_bkransomware.exe
Size

96KB
MD5

3de038aa04235403167cde0f8d5812c2
SHA1

542e20f52fff41ea9f72ca9cb30f8c1b6dfcbdea
SHA256

4b6ec354e2b5762b42fbd692a2126e1f6a3a216cd5c1a32df7ca377d59acabf7
SHA512

98fb300a6b6fbf2e20388c76c8c488e9dd0f0c3f201a5ae50544b8fc2e879275b6774f07320bb32628e9937d57bc56a7523308ae580b6976ae5085407c11c89b
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTdtDBL4W+fD9BylXc9Ftj25LjdBTZX:ZhpAyazIlyazTdovDj+4sBF

Score

7^/10

discovery persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1236	DxeCUDm2qGwUctO.exe
2720	CTS.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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"	2024-10-04_3de038aa04235403167cde0f8d5812c2_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	2024-10-04_3de038aa04235403167cde0f8d5812c2_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-10-04_3de038aa04235403167cde0f8d5812c2_bkransomware.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5092	2024-10-04_3de038aa04235403167cde0f8d5812c2_bkransomware.exe
Token: SeDebugPrivilege	2720	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5092 wrote to memory of 1236	5092	2024-10-04_3de038aa04235403167cde0f8d5812c2_bkransomware.exe	82
PID 5092 wrote to memory of 1236	5092	2024-10-04_3de038aa04235403167cde0f8d5812c2_bkransomware.exe	82
PID 5092 wrote to memory of 2720	5092	2024-10-04_3de038aa04235403167cde0f8d5812c2_bkransomware.exe	83
PID 5092 wrote to memory of 2720	5092	2024-10-04_3de038aa04235403167cde0f8d5812c2_bkransomware.exe	83
PID 5092 wrote to memory of 2720	5092	2024-10-04_3de038aa04235403167cde0f8d5812c2_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-10-04_3de038aa04235403167cde0f8d5812c2_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-10-04_3de038aa04235403167cde0f8d5812c2_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5092
- C:\Users\Admin\AppData\Local\Temp\DxeCUDm2qGwUctO.exe
  C:\Users\Admin\AppData\Local\Temp\DxeCUDm2qGwUctO.exe
  2⤵
  - Executes dropped EXE
  PID:1236
- C:\Windows\CTS.exe
  "C:\Windows\CTS.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2720

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

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
fe15f9321a211f56d2416298c8041cb8

SHA1
3775908d7b1fae44a4280e584fc3638cd65acfe3

SHA256
50c7c28c8caeef299e426adc26a3830a50932f75091ec6c20fcb5937373885b7

SHA512
db1b4d8962a46860de5b58f04b021bc613cbb64bb43887ed262768dae90f28b8c58d3885d13d78e05c75fb03a50ae8e27c72ea4a8b60481ee89417124bf72e98

Download Submit
C:\Users\Admin\AppData\Local\Temp\DxeCUDm2qGwUctO.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/1236-16-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads