3e11dfbd50ae05e09e6408a6f9b0abfc27faa11ecfc121fccdab5abc18128bac

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
09/05/2024, 14:58 UTC

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General

Target

2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe
Size

135KB
MD5

bbf5bac9498602c3d3a34575a7a80d8a
SHA1

94fc2a3ea37a0dbec1bee2ba7b81871ef023415c
SHA256

3e11dfbd50ae05e09e6408a6f9b0abfc27faa11ecfc121fccdab5abc18128bac
SHA512

5e4522aca1180279ebfdf392ca5a1f459b0674af0d4f65672e5335c427d3a8b4ce212995fecc6fd7fe421e733547a29b8245bacf36c5660953624b6f308f3d3c
SSDEEP

3072:ZhpAyazIlyazTECIFnXHdachgD6cdaB7GjwA8Qq1L:hZMazzIx9acO9dQ7GjwA8NL

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2540	E5bBXk2WN9deRfo.exe
3024	CTS.exe

Loads dropped DLL 2 IoCs

pid	Process
2980	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe
2980	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.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"	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_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	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2980	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe
Token: SeDebugPrivilege	3024	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2980 wrote to memory of 2540	2980	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	28
PID 2980 wrote to memory of 2540	2980	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	28
PID 2980 wrote to memory of 2540	2980	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	28
PID 2980 wrote to memory of 2540	2980	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	28
PID 2980 wrote to memory of 3024	2980	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	29
PID 2980 wrote to memory of 3024	2980	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	29
PID 2980 wrote to memory of 3024	2980	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	29
PID 2980 wrote to memory of 3024	2980	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_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:2980
- C:\Users\Admin\AppData\Local\Temp\E5bBXk2WN9deRfo.exe
  C:\Users\Admin\AppData\Local\Temp\E5bBXk2WN9deRfo.exe
  2⤵
  - Executes dropped EXE
  PID:2540
- 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:3024

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\Temp\E5bBXk2WN9deRfo.exe

Filesize
135KB

MD5
9c74ee5545523425577c5be8a2a71475

SHA1
8d2c4855b1ef5c142b5d60ef9c91c26c5684caf2

SHA256
cf7fb7a80697c744b6c28ab54a4f126330aed8dc388d7c7bfd165ec46f60ae68

SHA512
fafd4db452b4005a2442e8299e99e0199e73d9e5063bf8fece2a8423020ad773742f81451f657444ffdcb447c8b1abff2a3a73f9b8d6e264dfff7b664035df90

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
\Users\Admin\AppData\Local\Temp\E5bBXk2WN9deRfo.exe

Filesize
64KB

MD5
ae6ce17005c63b7e9bf15a2a21abb315

SHA1
9b6bdfb9d648fa422f54ec07b8c8ea70389c09eb

SHA256
4a3387a54eeca83f3a8ff1f5f282f7966c9e7bfe159c8eb45444cab01b3e167e

SHA512
c883a5f599540d636efc8c0abc05aab7bad0aa1b10ab507f43f18e0fba905a10b94ff2f1ba10ae0fee15cc1b90a165a768dc078fda0ac27474f0eef66f6a11af

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads

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