f870c82ad644e2b456ebbfe1a10534047f62fbd2658b565169ba484ae9a6ffeb

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24-05-2024 05:24

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General

Target

2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe
Size

96KB
MD5

1a90192d4b52eb536447d5a6b5e9b3d2
SHA1

28d73dcda2d4ff604baaa35a8b4648bd476052f3
SHA256

f870c82ad644e2b456ebbfe1a10534047f62fbd2658b565169ba484ae9a6ffeb
SHA512

b4669c62172b819843cbd16f58f25c9c0609a793a9d2e3a64e2ab0d79c7ca462f1b32ba722b2e73eac1405630edb53f854a76071195bbd5f4e07740440f2b8c4
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTYwmqAGVFvms9h:ZhpAyazIlyazTY2AYFvFh

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1672	m5jsX8Dr6yDZLhF.exe
1216	CTS.exe

Loads dropped DLL 3 IoCs

pid	Process
1724	2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe
1724	2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe
2560	Process not Found

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_1a90192d4b52eb536447d5a6b5e9b3d2_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_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1724	2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe
Token: SeDebugPrivilege	1216	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1724 wrote to memory of 1672	1724	2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe	28
PID 1724 wrote to memory of 1672	1724	2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe	28
PID 1724 wrote to memory of 1672	1724	2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe	28
PID 1724 wrote to memory of 1672	1724	2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe	28
PID 1724 wrote to memory of 1216	1724	2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe	29
PID 1724 wrote to memory of 1216	1724	2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe	29
PID 1724 wrote to memory of 1216	1724	2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe	29
PID 1724 wrote to memory of 1216	1724	2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_1a90192d4b52eb536447d5a6b5e9b3d2_bkransomware.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1724
- C:\Users\Admin\AppData\Local\Temp\m5jsX8Dr6yDZLhF.exe
  C:\Users\Admin\AppData\Local\Temp\m5jsX8Dr6yDZLhF.exe
  2⤵
  - Executes dropped EXE
  PID:1672
- 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:1216

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:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
\Users\Admin\AppData\Local\Temp\m5jsX8Dr6yDZLhF.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
memory/1672-16-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads