6032096784a8fad68b47f70b5cfc05e7b997070a83b655e3f7717f8e81ea70a8

Analysis

max time kernel
117s
max time network
122s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
12/06/2024, 15:50

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General

Target

2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe
Size

290KB
MD5

3557f1b951eb1a85cf43a972858bd4e2
SHA1

71f627c9ef94359474f77882798be3d82ffe2513
SHA256

6032096784a8fad68b47f70b5cfc05e7b997070a83b655e3f7717f8e81ea70a8
SHA512

18c74d1d68c12adf7c1be6fdc9b9eeaaf6c33f7e4bc91dc822287e95b2aa19691c87d851cc0cdb23d1784f227043a8945483f9deea938e483a0e612fb2ededd5
SSDEEP

6144:hZMazFlHPfPL1RhcRfb+JPbL43LA9Xm8OuTnQaGGFmGWCkjfF:hS0RsV+Jn40Nm7uTnvVwGWVF

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
1520	Oos8xmAwoBAZ2qE.exe
1104	CTS.exe
1372	Process not Found

Loads dropped DLL 2 IoCs

pid	Process
2192	2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe
1372	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"	2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_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	2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2192	2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe
Token: SeDebugPrivilege	1104	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2192 wrote to memory of 1520	2192	2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe	28
PID 2192 wrote to memory of 1520	2192	2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe	28
PID 2192 wrote to memory of 1520	2192	2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe	28
PID 2192 wrote to memory of 1520	2192	2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe	28
PID 2192 wrote to memory of 1104	2192	2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe	29
PID 2192 wrote to memory of 1104	2192	2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe	29
PID 2192 wrote to memory of 1104	2192	2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe	29
PID 2192 wrote to memory of 1104	2192	2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-12_3557f1b951eb1a85cf43a972858bd4e2_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:2192
- C:\Users\Admin\AppData\Local\Temp\Oos8xmAwoBAZ2qE.exe
  C:\Users\Admin\AppData\Local\Temp\Oos8xmAwoBAZ2qE.exe
  2⤵
  - Executes dropped EXE
  PID:1520
- 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:1104

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

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\Users\Admin\AppData\Local\Temp\Oos8xmAwoBAZ2qE.exe

Filesize
219KB

MD5
e2312f199976d03a7cf41e453c5af246

SHA1
c723bf05f7132c9b66c4f91d6cc363d08b4ed622

SHA256
84fe7824717bb55d7f32c7487e37012a1bc6cd4c8c0202be4bfb07e770f8dc51

SHA512
a5cad97d8bcf893b79eed436ae8df232d7e53df86a0ed38b381c128c5d8c76c0caad41407ed564f2ea2725236eb98ea6d29413886ea22371920bf2b498b49686

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads