3e11dfbd50ae05e09e6408a6f9b0abfc27faa11ecfc121fccdab5abc18128bac

Analysis

max time kernel
141s
max time network
105s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
09/05/2024, 14:58

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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
1656	ilzz7njItouhIyD.exe
3788	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"	2024-05-09_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	1132	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe
Token: SeDebugPrivilege	3788	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1132 wrote to memory of 1656	1132	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	83
PID 1132 wrote to memory of 1656	1132	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	83
PID 1132 wrote to memory of 1656	1132	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	83
PID 1132 wrote to memory of 3788	1132	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	84
PID 1132 wrote to memory of 3788	1132	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	84
PID 1132 wrote to memory of 3788	1132	2024-05-09_bbf5bac9498602c3d3a34575a7a80d8a_bkransomware.exe	84

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⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1132
- C:\Users\Admin\AppData\Local\Temp\ilzz7njItouhIyD.exe
  C:\Users\Admin\AppData\Local\Temp\ilzz7njItouhIyD.exe
  2⤵
  - Executes dropped EXE
  PID:1656
- 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:3788

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
789KB

MD5
6965f4afd5fbfd1cb1675367f20bd3cd

SHA1
b5226723a1d267ef11cb9a9a8950b2282704ea75

SHA256
8913e8293ff88f3c8aea171bb730828a2dbe334cd83f5ec94881d936d6749997

SHA512
8f32b664a8e8ac14d5e1f2402899bc4457978bb4d4c76d86eeea4a12c411f3c3327ad3e12a763351c6f09d4e916cfac319aa104fd4c717851ff46028f9615fd5

Download Submit
C:\Users\Admin\AppData\Local\Temp\ilzz7njItouhIyD.exe

Filesize
64KB

MD5
ae6ce17005c63b7e9bf15a2a21abb315

SHA1
9b6bdfb9d648fa422f54ec07b8c8ea70389c09eb

SHA256
4a3387a54eeca83f3a8ff1f5f282f7966c9e7bfe159c8eb45444cab01b3e167e

SHA512
c883a5f599540d636efc8c0abc05aab7bad0aa1b10ab507f43f18e0fba905a10b94ff2f1ba10ae0fee15cc1b90a165a768dc078fda0ac27474f0eef66f6a11af

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads