f79c5fe0323d559e04fe8f6dfe07f04b0d27cc2ed76dfc6004ca1d6d780c2ebc

Analysis

max time kernel
120s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
29/04/2024, 01:04

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General

Target

2024-04-29_dc6b86f94fdfd66ae253ebee6aff4a8d_bkransomware.exe
Size

96KB
MD5

dc6b86f94fdfd66ae253ebee6aff4a8d
SHA1

691180ddc186125ad9fa81ea6c70b338ea6a7461
SHA256

f79c5fe0323d559e04fe8f6dfe07f04b0d27cc2ed76dfc6004ca1d6d780c2ebc
SHA512

877e93b520c36ac52c45a538662d81a11700a88f84c111a12f621b6aa874b1badbe019c7b8d1bc74d3441f3a726c44e854ea253eecb90563869e645e25283aec
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTr/uo0Iuu6P+j7kKEyG:ZRpAyazIliazTr/b0UWS7kKEX

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2996	3IZnjNLZX8nls6U.exe
3052	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"	2024-04-29_dc6b86f94fdfd66ae253ebee6aff4a8d_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	2024-04-29_dc6b86f94fdfd66ae253ebee6aff4a8d_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4896	2024-04-29_dc6b86f94fdfd66ae253ebee6aff4a8d_bkransomware.exe
Token: SeDebugPrivilege	3052	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4896 wrote to memory of 2996	4896	2024-04-29_dc6b86f94fdfd66ae253ebee6aff4a8d_bkransomware.exe	82
PID 4896 wrote to memory of 2996	4896	2024-04-29_dc6b86f94fdfd66ae253ebee6aff4a8d_bkransomware.exe	82
PID 4896 wrote to memory of 3052	4896	2024-04-29_dc6b86f94fdfd66ae253ebee6aff4a8d_bkransomware.exe	84
PID 4896 wrote to memory of 3052	4896	2024-04-29_dc6b86f94fdfd66ae253ebee6aff4a8d_bkransomware.exe	84
PID 4896 wrote to memory of 3052	4896	2024-04-29_dc6b86f94fdfd66ae253ebee6aff4a8d_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-29_dc6b86f94fdfd66ae253ebee6aff4a8d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-29_dc6b86f94fdfd66ae253ebee6aff4a8d_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4896
- C:\Users\Admin\AppData\Local\Temp\3IZnjNLZX8nls6U.exe
  C:\Users\Admin\AppData\Local\Temp\3IZnjNLZX8nls6U.exe
  2⤵
  - Executes dropped EXE
  PID:2996
- 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:3052

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
cacda7f6a35237024e51133cf7d895bb

SHA1
09693c2a44c3953d67845c8efe66bc6af3009cba

SHA256
0fc8d772239c6cab05458822830c299d70250727bdf6ccae8e8b6e3d6c80b101

SHA512
5a3dc9623031c2f1eff82253d9f7dbad06576dd1bf9fc8c4adabb322cfbdc1b6a872c8f0128aa40f7d7be5e84f58fe31317206466d28298fd400e10c7e8e5f66

Download Submit
C:\Users\Admin\AppData\Local\Temp\3IZnjNLZX8nls6U.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
memory/2996-12-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads