4a3e7e753b93543b3394c1b9c907adbbf3cd006ebbfe04edbb799c611af555a5

Analysis

max time kernel
55s
max time network
50s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 16:40

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General

Target

2024-04-30_5195b6a0c6596d7e6df9f71c47cb0e7d_bkransomware.exe
Size

135KB
MD5

5195b6a0c6596d7e6df9f71c47cb0e7d
SHA1

3ea934ee14c221e2c64e3cbcff7b9128fea2d89f
SHA256

4a3e7e753b93543b3394c1b9c907adbbf3cd006ebbfe04edbb799c611af555a5
SHA512

f4d312c9abcee3d625ad0f1e4e973c66f5d0ff899f8db91882ad58b123504c785d4a8dbc005953295313c1a95c3c69de7a5a41e98d41cad61c15c90435339d3e
SSDEEP

3072:ZRpAyazIliazT1YXpyHinD3kqXp3yYobWXy:xZ8azBdiRobgy

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
4328	RicIMXrd5d206u7.exe
2680	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"	2024-04-30_5195b6a0c6596d7e6df9f71c47cb0e7d_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	2024-04-30_5195b6a0c6596d7e6df9f71c47cb0e7d_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1936	2024-04-30_5195b6a0c6596d7e6df9f71c47cb0e7d_bkransomware.exe
Token: SeDebugPrivilege	2680	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1936 wrote to memory of 4328	1936	2024-04-30_5195b6a0c6596d7e6df9f71c47cb0e7d_bkransomware.exe	86
PID 1936 wrote to memory of 4328	1936	2024-04-30_5195b6a0c6596d7e6df9f71c47cb0e7d_bkransomware.exe	86
PID 1936 wrote to memory of 4328	1936	2024-04-30_5195b6a0c6596d7e6df9f71c47cb0e7d_bkransomware.exe	86
PID 1936 wrote to memory of 2680	1936	2024-04-30_5195b6a0c6596d7e6df9f71c47cb0e7d_bkransomware.exe	87
PID 1936 wrote to memory of 2680	1936	2024-04-30_5195b6a0c6596d7e6df9f71c47cb0e7d_bkransomware.exe	87
PID 1936 wrote to memory of 2680	1936	2024-04-30_5195b6a0c6596d7e6df9f71c47cb0e7d_bkransomware.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-30_5195b6a0c6596d7e6df9f71c47cb0e7d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_5195b6a0c6596d7e6df9f71c47cb0e7d_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1936
- C:\Users\Admin\AppData\Local\Temp\RicIMXrd5d206u7.exe
  C:\Users\Admin\AppData\Local\Temp\RicIMXrd5d206u7.exe
  2⤵
  - Executes dropped EXE
  PID:4328
- 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:2680

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
9dd823689877209a5dd29c6be6a2433a

SHA1
02bb5accbca9fabf269c00d8376871a22b165937

SHA256
f6de9a66824895ed74fcbc79de27dca26555662707238c51ff72939d7c3124be

SHA512
c018e077d6053985acf13c60179b8223505eca51b0db163cb3cc7c71567ba13d48723ab391a4fe4e52ad871aab707ccf864fbef8f14b32dd411455bbeda12afb

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C:\Users\Admin\AppData\Local\Temp\RicIMXrd5d206u7.exe

Filesize
64KB

MD5
e97c622b03fb2a2598bf019fbbe29f2c

SHA1
32698bd1d3a0ff6cf441770d1b2b816285068d19

SHA256
5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160

SHA512
db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d

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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

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Downloads