0cefbc48321311c0f1b393371365f21ecbc335665d97da582fb480e975836110

Analysis

max time kernel
133s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
03/05/2024, 23:27

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General

Target

2024-05-03_5aa805a750a98d81b7430dd758d6205c_bkransomware.exe
Size

108KB
MD5

5aa805a750a98d81b7430dd758d6205c
SHA1

dca9a0fb5f19b1267a9a84c5c9ee60346de4b6bb
SHA256

0cefbc48321311c0f1b393371365f21ecbc335665d97da582fb480e975836110
SHA512

50f09e7768df9167ba82309af3676a6f2291f01feb17c4b32c808bcd1a7b284ff687c41bf166a81d378aa632acff2850f46ef54c12d72b705f5601862dc4015b
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTAJdYCg0vBtA7E4b7EztosZ1fqg:ZhpAyazIlyazTAJvL5tmEltBfN

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3012	bFXdqZLDKX2UPdM.exe
1228	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"	2024-05-03_5aa805a750a98d81b7430dd758d6205c_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	2024-05-03_5aa805a750a98d81b7430dd758d6205c_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1072	2024-05-03_5aa805a750a98d81b7430dd758d6205c_bkransomware.exe
Token: SeDebugPrivilege	1228	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1072 wrote to memory of 3012	1072	2024-05-03_5aa805a750a98d81b7430dd758d6205c_bkransomware.exe	83
PID 1072 wrote to memory of 3012	1072	2024-05-03_5aa805a750a98d81b7430dd758d6205c_bkransomware.exe	83
PID 1072 wrote to memory of 1228	1072	2024-05-03_5aa805a750a98d81b7430dd758d6205c_bkransomware.exe	84
PID 1072 wrote to memory of 1228	1072	2024-05-03_5aa805a750a98d81b7430dd758d6205c_bkransomware.exe	84
PID 1072 wrote to memory of 1228	1072	2024-05-03_5aa805a750a98d81b7430dd758d6205c_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-03_5aa805a750a98d81b7430dd758d6205c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_5aa805a750a98d81b7430dd758d6205c_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1072
- C:\Users\Admin\AppData\Local\Temp\bFXdqZLDKX2UPdM.exe
  C:\Users\Admin\AppData\Local\Temp\bFXdqZLDKX2UPdM.exe
  2⤵
  - Executes dropped EXE
  PID:3012
- 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:1228

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
7cc34aa3807d403716f57abcda71a300

SHA1
6e3980461c5e6adc82eefcc69ad53df9709ffaa2

SHA256
f1fdc3da57ef8b63da45fedef707484afdd450346b5e126071a5b994d706a60c

SHA512
26a22d814a465be132b79ba13408f6fe2241be8b30a4894900c1812cbfe2e9c0c43a131d4ad7510734117ef91fbd5c3865e78293a353603e01549bc0d537a696

Download Submit
C:\Users\Admin\AppData\Local\Temp\bFXdqZLDKX2UPdM.exe

Filesize
37KB

MD5
371627fd939bb54ed26f473ca54e718f

SHA1
3a6910295ae9d1fe388b7572736b8bdfc6e0d111

SHA256
b5481e424246a174456add0132427df3a7cd4105f5769835cdf597966c7c0b61

SHA512
ff7ea5ae445089ffa808c97e23c620313dd267994b343176c0cb9f8098aace1d12d9212b96611fdf97c974ef94f866b817aed9c0e5f4f195234e7d8d4ec3f8cd

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/3012-12-0x00007FFE2B313000-0x00007FFE2B315000-memory.dmp

Filesize
8KB

Download
memory/3012-11-0x0000000000210000-0x000000000021E000-memory.dmp

Filesize
56KB

Download
memory/3012-27-0x00007FFE2B310000-0x00007FFE2BDD1000-memory.dmp

Filesize
10.8MB

Download
memory/3012-32-0x00007FFE2B310000-0x00007FFE2BDD1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads