f130d521e051e0b199b3b38ca2c5176cc6661122e971eb2a7139f47fe814464b

Analysis

max time kernel
139s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
20/05/2024, 22:31

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General

Target

2024-05-20_adf537d022df4cb4bd53807cae1c0613_bkransomware.exe
Size

96KB
MD5

adf537d022df4cb4bd53807cae1c0613
SHA1

1f58040692595c945178c7b2ae3bd0bfa0fdf559
SHA256

f130d521e051e0b199b3b38ca2c5176cc6661122e971eb2a7139f47fe814464b
SHA512

60c6e1b193faf7cf49b45b19257e6ab902ed515b3684b5db91eabc18c267710b1d7686ab36fdc3aafcde36972687ee7fe221fe5f2c75e9ec162bab61d59703d7
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTri3zkR8o3EVTFlTZo+HiM+E:ZRpAyazIliazTriwSo0HlZ+E

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
4236	s8E83Y5H9NBktDw.exe
4840	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"	2024-05-20_adf537d022df4cb4bd53807cae1c0613_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	2024-05-20_adf537d022df4cb4bd53807cae1c0613_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1580	2024-05-20_adf537d022df4cb4bd53807cae1c0613_bkransomware.exe
Token: SeDebugPrivilege	4840	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1580 wrote to memory of 4236	1580	2024-05-20_adf537d022df4cb4bd53807cae1c0613_bkransomware.exe	92
PID 1580 wrote to memory of 4236	1580	2024-05-20_adf537d022df4cb4bd53807cae1c0613_bkransomware.exe	92
PID 1580 wrote to memory of 4840	1580	2024-05-20_adf537d022df4cb4bd53807cae1c0613_bkransomware.exe	93
PID 1580 wrote to memory of 4840	1580	2024-05-20_adf537d022df4cb4bd53807cae1c0613_bkransomware.exe	93
PID 1580 wrote to memory of 4840	1580	2024-05-20_adf537d022df4cb4bd53807cae1c0613_bkransomware.exe	93

C:\Users\Admin\AppData\Local\Temp\2024-05-20_adf537d022df4cb4bd53807cae1c0613_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-20_adf537d022df4cb4bd53807cae1c0613_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1580
- C:\Users\Admin\AppData\Local\Temp\s8E83Y5H9NBktDw.exe
  C:\Users\Admin\AppData\Local\Temp\s8E83Y5H9NBktDw.exe
  2⤵
  - Executes dropped EXE
  PID:4236
- 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:4840

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4036,i,10373433614523925616,13586256558317053467,262144 --variations-seed-version --mojo-platform-channel-handle=4204 /prefetch:8
1⤵
PID:3736

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
6a8760d8162ec1c5d904fdd58d9161e8

SHA1
d674cb4662bf385440ba3520679c7dd05bf6e8e4

SHA256
d3423b3c7b2f34df12d00978c90fbe50dcf19026e147c3f379278095d78831d8

SHA512
95a3cd91d3ceab8bb1c93c443a400507689aa1b6559b40f39356f541f5b1be40caa60e5a49e95270be4d8acf3e819922046fc881037b8f6ec29307f9a703b3eb

Download Submit
C:\Users\Admin\AppData\Local\Temp\s8E83Y5H9NBktDw.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/4236-12-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads