b879835d2196ec3124bdd23cac9119aa5100f6cbd4b942c7f8ab8c1b960bcfc4

Analysis

max time kernel
143s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
24/04/2024, 21:31

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General

Target

2024-04-24_a8cb661bcd4b1e12026533385ac84544_bkransomware.exe
Size

71KB
MD5

a8cb661bcd4b1e12026533385ac84544
SHA1

c9aeb346c4d1042b5a1acb656d60b48e1903bbfa
SHA256

b879835d2196ec3124bdd23cac9119aa5100f6cbd4b942c7f8ab8c1b960bcfc4
SHA512

51328339c681273df3820ec2f909779c248b25bd4a1f167945e0b3582267104e9e294bb6e4170047fdd51d52a6ce6cea660b321a609d7e48687acdc7b237615e
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTi:ZRpAyazIliazTi

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4104	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"	2024-04-24_a8cb661bcd4b1e12026533385ac84544_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	CTS.exe
File created	C:\Windows\CTS.exe	2024-04-24_a8cb661bcd4b1e12026533385ac84544_bkransomware.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	868	2024-04-24_a8cb661bcd4b1e12026533385ac84544_bkransomware.exe
Token: SeDebugPrivilege	4104	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 868 wrote to memory of 4104	868	2024-04-24_a8cb661bcd4b1e12026533385ac84544_bkransomware.exe	91
PID 868 wrote to memory of 4104	868	2024-04-24_a8cb661bcd4b1e12026533385ac84544_bkransomware.exe	91
PID 868 wrote to memory of 4104	868	2024-04-24_a8cb661bcd4b1e12026533385ac84544_bkransomware.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-24_a8cb661bcd4b1e12026533385ac84544_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_a8cb661bcd4b1e12026533385ac84544_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:868
- 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:4104

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 --mojo-platform-channel-handle=3700 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
1⤵
PID:2308

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

Replay Monitor

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Downloads

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

Filesize
789KB

MD5
a56432784a17639eb9fc2a0f80caa1b8

SHA1
f6093ee5847789d489ef4e18cd8364f6303061c3

SHA256
8db37229180dc3c5317b3fceee95f59ba1b2a9a04c09bd6a06b92cb9848b74e6

SHA512
3168a1c3fe42369eecbb239219c1dd0464cb5eb9d36c4a6874ab0de740d7d5dfeeaf1c80a128fd63735cb325c21e7bc9d24b073bbb7aad55cf520da5fee99885

Download Submit
C:\Users\Admin\AppData\Local\Temp\KX4SZHGyg7FEo7b.exe

Filesize
71KB

MD5
245a53646acb9869f01f493d462b2be9

SHA1
beccc6d7884414af9b4025affc4a78744c60d02a

SHA256
1cbd18cc3ed1c9942eeaf44065b454a40e416f4b34e13227e6bbbb60edfc17ba

SHA512
e186cc74e5c66a0519acce9697644e2bca76a73b146cfef9d98b240fcfc700e237a4a855ac765ef81edade9575d63c5f3bf346af7bb1cac09364abbf9d403def

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads