e3581f11676fcb5f1c890234451b07a5a0b9dbef2a74ec98f922c18878977910

Analysis

max time kernel
94s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
29/09/2024, 22:33

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General

Target

2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe
Size

71KB
MD5

bf2b422f2fb1b7026c19261c5deb1100
SHA1

9ecdd79886d468993694828f64c07672cc250891
SHA256

e3581f11676fcb5f1c890234451b07a5a0b9dbef2a74ec98f922c18878977910
SHA512

2014c660ed3a1a95ccf1f2bedeec2285453e718600122971a7331c090d2ad0766a4beb3c869e91306232a186060976bfc29d9e2f66698a021bfc06533ed287ad
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTt:ZhpAyazIlyazTt

Score

7^/10

discovery persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4512	CTS.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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"	2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_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	2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4404	2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe
Token: SeDebugPrivilege	4512	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4404 wrote to memory of 4512	4404	2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe	82
PID 4404 wrote to memory of 4512	4404	2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe	82
PID 4404 wrote to memory of 4512	4404	2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4404
- C:\Windows\CTS.exe
  "C:\Windows\CTS.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4512

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

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
4587facdad1090fd7ac6eab2cc87cb82

SHA1
01bf48a2e2fe8273f9ccf7c116f8c0659c339161

SHA256
a6d7495fd4d2503df027a5675bf6f841e39f507d7e8994bb49f47f4108eebf95

SHA512
52962a805b9d721f854f9ae6da06287b6a6a9b5cf1e63e4ba959f9341f54487fefdcf75c5452f651726ad275e5dd0f1352cfb49bb552aab1445eb47ca693de52

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C:\Users\Admin\AppData\Local\Temp\y2cSqpa3Oinl40v.exe

Filesize
71KB

MD5
9811bfdc87a9108e5a61088ec2476de7

SHA1
6bcb3cd2050e3ddc3be87a03dd15ecf2c44c0c91

SHA256
6fbc7b7e66203cb95d3fefef3f76b387b74cb1398318d843331c17d58efdc405

SHA512
c7ce71778e0f2542c788cb0a6e420f2a1dd8539b90e2a7856c0c4fabc8a17e4e7577107e6bb5edd80899247c246d604f535ce8dddf4997f3c7a6c9e50ff98956

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads