e3581f11676fcb5f1c890234451b07a5a0b9dbef2a74ec98f922c18878977910

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-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
1320	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 1 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

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2248	2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe
Token: SeDebugPrivilege	1320	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2248 wrote to memory of 1320	2248	2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe	28
PID 2248 wrote to memory of 1320	2248	2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe	28
PID 2248 wrote to memory of 1320	2248	2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe	28
PID 2248 wrote to memory of 1320	2248	2024-09-29_bf2b422f2fb1b7026c19261c5deb1100_bkransomware.exe	28

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:2248
- 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:1320

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\Temp\wl6KE8HAKNC99Wq.exe

Filesize
71KB

MD5
5ce19ab9987da5eda9d883763f8124f5

SHA1
38357212d3a6a66b0f472a09b595c247d0dab5f3

SHA256
724cf8f0051f6d022af9285b6476f209c7b4c87fe7c3de5a38dbbe27e756b519

SHA512
cf46f9da8d8bc264ca08f1202d14b4a541c7dae3ba5b13588587c5b80552c91c749531553d320da73323bd6e2d5c7d8eeafff8b67928d1129c47419e6ca238db

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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