5186286e3efff1bf48947b160ab91bf5f93b447e64cf280547ed767fc25d68fe

Analysis

max time kernel
132s
max time network
101s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
05/05/2024, 03:42

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General

Target

2024-05-05_e8324521457b68999db7ff2716ec6eaa_bkransomware.exe
Size

288KB
MD5

e8324521457b68999db7ff2716ec6eaa
SHA1

1f70c5b4b151cdc08c687d3e934bfff10b38c1f3
SHA256

5186286e3efff1bf48947b160ab91bf5f93b447e64cf280547ed767fc25d68fe
SHA512

8a64aa62d260b3e71038e9b3114bb37e01ab3959ea04cb6243e8bc76692267fd8e222ddec9b175537ffb2df57b69f6397c969a7a8969a504ccf460384e125701
SSDEEP

6144:xZ8az6rVGEDWWnpYXlls66ZrOm95oOg+mc8KdZBv:xC0ENyWpYXXuZqmpZmq

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
844	03uCoVf9QEy6q7a.exe
3636	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"	2024-05-05_e8324521457b68999db7ff2716ec6eaa_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	2024-05-05_e8324521457b68999db7ff2716ec6eaa_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2392	2024-05-05_e8324521457b68999db7ff2716ec6eaa_bkransomware.exe
Token: SeDebugPrivilege	3636	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2392 wrote to memory of 844	2392	2024-05-05_e8324521457b68999db7ff2716ec6eaa_bkransomware.exe	83
PID 2392 wrote to memory of 844	2392	2024-05-05_e8324521457b68999db7ff2716ec6eaa_bkransomware.exe	83
PID 2392 wrote to memory of 3636	2392	2024-05-05_e8324521457b68999db7ff2716ec6eaa_bkransomware.exe	84
PID 2392 wrote to memory of 3636	2392	2024-05-05_e8324521457b68999db7ff2716ec6eaa_bkransomware.exe	84
PID 2392 wrote to memory of 3636	2392	2024-05-05_e8324521457b68999db7ff2716ec6eaa_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-05_e8324521457b68999db7ff2716ec6eaa_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-05_e8324521457b68999db7ff2716ec6eaa_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2392
- C:\Users\Admin\AppData\Local\Temp\03uCoVf9QEy6q7a.exe
  C:\Users\Admin\AppData\Local\Temp\03uCoVf9QEy6q7a.exe
  2⤵
  - Executes dropped EXE
  PID:844
- 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:3636

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
394KB

MD5
dc9e70f2cbcd061dde9af31f93d64226

SHA1
22f59fb585f23cced8cb5a34409e003fcc9bd2e8

SHA256
2ba8ceab284fe9c9df916873ddc6b5aefd7b40f5b6fbd4f898d246bbdf820459

SHA512
f660c44494b5e923dbe580e4bb8f09eace3958ae4246f3eac762c139aca54db11612d7d366707f4f45b50ca5f66a567a466cc1789bcae579cb9fef7797ab9e96

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C:\Users\Admin\AppData\Local\Temp\03uCoVf9QEy6q7a.exe

Filesize
217KB

MD5
f8a38fd27da720881c0af1ac99b8c1ad

SHA1
2ed31938119e2ebdeb0f5539c985e9965aef72d7

SHA256
b2e32b3fa44b3a9a8fdfa906627355f6f48b4821929f9bce5ded2d07894361d4

SHA512
aafa05bc5bd68687b998fe4d9a619caecc65d14f317af7a05ac0ecab7e231891e8719029245dc84eddce20bdd4c0cc6f4ffafdf8200227746b28cc6628564495

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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