a8aa414de5d416d93e66ad6803ce45a7e8b605487224b070f910dd7313127dd9

Analysis

max time kernel
137s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10/05/2024, 04:15

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General

Target

2024-05-10_f0f95e1d19ca36bbd552da27eea5e4ec_bkransomware.exe
Size

71KB
MD5

f0f95e1d19ca36bbd552da27eea5e4ec
SHA1

0c231cf2a496231572576193ae96e82d91e342cf
SHA256

a8aa414de5d416d93e66ad6803ce45a7e8b605487224b070f910dd7313127dd9
SHA512

8d71b556cd1f7139a4381fa78084fb809761b7090cd73a115a6375c11826a413c819493ccaeb9289e19b832f37d6cba90e3dbcfadee41ccce4a8650fad276a63
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTu:ZRpAyazIliazTu

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4160	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"	2024-05-10_f0f95e1d19ca36bbd552da27eea5e4ec_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	2024-05-10_f0f95e1d19ca36bbd552da27eea5e4ec_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3928	2024-05-10_f0f95e1d19ca36bbd552da27eea5e4ec_bkransomware.exe
Token: SeDebugPrivilege	4160	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3928 wrote to memory of 4160	3928	2024-05-10_f0f95e1d19ca36bbd552da27eea5e4ec_bkransomware.exe	92
PID 3928 wrote to memory of 4160	3928	2024-05-10_f0f95e1d19ca36bbd552da27eea5e4ec_bkransomware.exe	92
PID 3928 wrote to memory of 4160	3928	2024-05-10_f0f95e1d19ca36bbd552da27eea5e4ec_bkransomware.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-05-10_f0f95e1d19ca36bbd552da27eea5e4ec_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_f0f95e1d19ca36bbd552da27eea5e4ec_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3928
- 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:4160

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=3660 --field-trial-handle=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8
1⤵
PID:4020

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
789KB

MD5
8a3cb2c89b9d9e73a48071df8a8ec86a

SHA1
ee536d2ce8216498b26d55b271296084dffa15dd

SHA256
650f6aba32990635a11984fadddc6341ed1701bae1f9d3828d90376f1acec036

SHA512
fe16948d061fe452ddec3e648fd11f4a33a83186bf7aafb23af4c72c7aa0f464029dac7e3e27fb7f2556fe74bd75a623e84a818b810579dc023347661d980ed7

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C:\Users\Admin\AppData\Local\Temp\FOvwCA89hmvgO77.exe

Filesize
71KB

MD5
75e8ae963a72de3248fb0c126219d656

SHA1
ccd6c70b623c7b417490a4421370987ef65045b3

SHA256
3b89e5d97c37511e03c5d4f75e7fd6fb7c47536e0eeb9068ebcc4c14c6d9c549

SHA512
e5a7700b3226b685aa27f9e64c02a0ec7d4bfb60ee816d00120791aa9df34b91908ffaf373f0551a454ffe4119c8b3f14fb5fc18907e7f3287f41476cc08b6d7

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads