24ed54adf9d08de4adb2d425c7147a4fd4c3029e3065b853a1a96a1ee3166b0d

Analysis

max time kernel
129s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2024, 15:59

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General

Target
2024-05-31_c2d23c3087deb8ab25d1143dcb212b1e_bkransomware.exe
Size 71KB
Sample240531-tff5kaea34
SHA256 24ed54adf9d08de4adb2d425c7147a4fd4c3029e3065b853a1a96a1ee3166b0d
MD5 c2d23c3087deb8ab25d1143dcb212b1e
SHA1 35ad54f9a09a286f4480cc287d6c1b7541543869
SHA512 759bd1a8b59935caae4eea4ba347043a25e38116400ec664573ba6beabbe7e198b535f13f52183a0f60b8fa58372cf29b2fe081f50dd706351cf257ac5904cdd
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTs:ZRpAyazIliazTs
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2600	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"	2024-05-31_c2d23c3087deb8ab25d1143dcb212b1e_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	2024-05-31_c2d23c3087deb8ab25d1143dcb212b1e_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4736	2024-05-31_c2d23c3087deb8ab25d1143dcb212b1e_bkransomware.exe
Token: SeDebugPrivilege	2600	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4736 wrote to memory of 2600	4736	2024-05-31_c2d23c3087deb8ab25d1143dcb212b1e_bkransomware.exe	83
PID 4736 wrote to memory of 2600	4736	2024-05-31_c2d23c3087deb8ab25d1143dcb212b1e_bkransomware.exe	83
PID 4736 wrote to memory of 2600	4736	2024-05-31_c2d23c3087deb8ab25d1143dcb212b1e_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-31_c2d23c3087deb8ab25d1143dcb212b1e_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_c2d23c3087deb8ab25d1143dcb212b1e_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4736
- 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:2600

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

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 394KB
SHA256 d2b46e4cb4a43750aaeb5e6a3163690bb4fe8be38cb1a281f64560cccbe37dff
MD5 9479cfa820d6aa7e576be0f213a47990
SHA1 655c8ebd4da60ea4221277c3ca2038dfa4136b02
SHA512 198691ef2a16ed2a09584b4d60c56d759840117e5fd8a80aad0a16dd730e02acc32f94b445e1f5c9d359916fc67f6823235293c875730b50ca21aa23db09cefb
SSDEEP 6144:xZ8azGkb+rMCVE26dlZAmDSAP3P5S5EFX7obA9vlhghG46tqBeaqkI:xC0zb+Y2EZAmDSAPRS5EFX7CAq5Ep
MD5 SHA1 SHA512 SSDEEP

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wdAtzm3KfDmyKZT.exe

Path C:\Users\Admin\AppData\Local\Temp\wdAtzm3KfDmyKZT.exe
Size 71KB
SHA256 104c2b80e007223b7f26bdc04d30554249a0e4f6e1ea729d54c80b8ffbb5d50c
MD5 da95ca43f9a5cd11e16633287732f0ba
SHA1 5709e2e2aabdd52a4e10f76db21933d0daa0d930
SHA512 b0d10fa741b99f539365c91fef530e09c0fe68648157b491c694f1f30b8d854c81505866deebb539098dcf7c0a845bc3c664488f89b879be78c680598f52bf78
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT3:ZRpAyazIliazT3
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT:ZRpAyazIliazT
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads