30daff20d895e395379b77e7572724915f1180b5140754ab706f262d6b8a7403

Analysis

max time kernel
136s
max time network
105s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24/05/2024, 22:25

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General

Target

2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe
Size

135KB
MD5

3d987fd031a4ac33a4bc130dd168bc4d
SHA1

8e46555e6647ed2350ceaaea94bbc3b3e40b39ff
SHA256

30daff20d895e395379b77e7572724915f1180b5140754ab706f262d6b8a7403
SHA512

01c7f419c6f57734f53d671bf1d3dec46c62f93b152b88d326abe59f599525a5b74b82b4ee3cc2192ab14ad6bdd3b26ea7d5b6c1e87fb12eaa6cdd84720253bf
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTw4Cqbz2KIKfLJgsJeRrHFQI5uVKEVW:ZRpAyazIliazTwMb6/KfacqVEV2wRHC

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3788	2FdObqkRUZQcmrW.exe
2392	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"	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_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	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	936	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe
Token: SeDebugPrivilege	2392	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 936 wrote to memory of 3788	936	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	83
PID 936 wrote to memory of 3788	936	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	83
PID 936 wrote to memory of 3788	936	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	83
PID 936 wrote to memory of 2392	936	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	84
PID 936 wrote to memory of 2392	936	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	84
PID 936 wrote to memory of 2392	936	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:936
- C:\Users\Admin\AppData\Local\Temp\2FdObqkRUZQcmrW.exe
  C:\Users\Admin\AppData\Local\Temp\2FdObqkRUZQcmrW.exe
  2⤵
  - Executes dropped EXE
  PID:3788
- 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:2392

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
e0784da58d98705a8c35960ca89e4028

SHA1
7dd21c7ee072e185551240e1d84c412a23b5c304

SHA256
1cbbc2499d01a9a1c64af15a1acc7a198a5dd4c662246076a1a94d96dd7126ed

SHA512
9f7f059adeccbf27601cd7ec19df66bb04bcc175ca006ed7abc32f05622a147aaf7e10ed912c1829da2eef390c6612a40bcb5e76d553f42d211f87057f4a6877

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C:\Users\Admin\AppData\Local\Temp\2FdObqkRUZQcmrW.exe

Filesize
64KB

MD5
a32a382b8a5a906e03a83b4f3e5b7a9b

SHA1
11e2bdd0798761f93cce363329996af6c17ed796

SHA256
75f12ea2f30d9c0d872dade345f30f562e6d93847b6a509ba53beec6d0b2c346

SHA512
ec87dd957be21b135212454646dcabdd7ef9442cf714e2c1f6b42b81f0c3fa3b1875bde9a8b538e8a0aa2190225649c29e9ed0f25176e7659e55e422dd4efe4c

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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

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Downloads