fdb00aa2ec83e784356b99390054d8c854a6e90c990d96f4259031365c3d991f

Analysis

max time kernel
93s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
03/06/2024, 21:30

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2024-06-03_4ea73d073e135f15a3d573c335d94e18_bkransomware.exe
Size 96KB
Sample240603-1cewnaaf85
SHA256 fdb00aa2ec83e784356b99390054d8c854a6e90c990d96f4259031365c3d991f
MD5 4ea73d073e135f15a3d573c335d94e18
SHA1 1a8cd8f7b2e96e67c2c1390c45b5a89f239b1686
SHA512 56a99bd7e75bb0224443f2d159d5193353997c4fae198fadac04e040f907ded3419c944206c13bf372f6944ec4342cb14c5654ae2aa65f032a28b156a22d393a
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTliGbOzm/WWi57rQ9vkBPGCt0:ZhpAyazIlyazTQBwWWi57rS
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3512	msBWTJWylN8drcu.exe
2196	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"	2024-06-03_4ea73d073e135f15a3d573c335d94e18_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	2024-06-03_4ea73d073e135f15a3d573c335d94e18_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1436	2024-06-03_4ea73d073e135f15a3d573c335d94e18_bkransomware.exe
Token: SeDebugPrivilege	2196	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1436 wrote to memory of 3512	1436	2024-06-03_4ea73d073e135f15a3d573c335d94e18_bkransomware.exe	82
PID 1436 wrote to memory of 3512	1436	2024-06-03_4ea73d073e135f15a3d573c335d94e18_bkransomware.exe	82
PID 1436 wrote to memory of 2196	1436	2024-06-03_4ea73d073e135f15a3d573c335d94e18_bkransomware.exe	84
PID 1436 wrote to memory of 2196	1436	2024-06-03_4ea73d073e135f15a3d573c335d94e18_bkransomware.exe	84
PID 1436 wrote to memory of 2196	1436	2024-06-03_4ea73d073e135f15a3d573c335d94e18_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-06-03_4ea73d073e135f15a3d573c335d94e18_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_4ea73d073e135f15a3d573c335d94e18_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1436
- C:\Users\Admin\AppData\Local\Temp\msBWTJWylN8drcu.exe
  C:\Users\Admin\AppData\Local\Temp\msBWTJWylN8drcu.exe
  2⤵
  - Executes dropped EXE
  PID:3512
- 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:2196

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

Replay Monitor

Loading Replay Monitor...

Downloads

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 394KB
SHA256 a3e6dd584a2e3cf9b10d6bdb78b5544eae0af60bdd8af36c6c96640720dd6799
MD5 040a65d76c0b1e6fd7c5f07f83fd0f69
SHA1 7424112f1c74a7ffc27be1162c04f736ebad9628
SHA512 bc24f109e451754a7b15ae299fe59c691bfcc9ac8b9fcd534e5ed19be0167ab4efbb1c53358d7195371dfd9eabeb835494fdfd394bb94181abe873caf59c7773
SSDEEP 6144:hZMazCjlcGTqqysSvgxEdIPjsX8W+Iz3gPey5uUXvq3qNXN5qpI:hS0CRTzy3dIVIzuvXCqtN5qm
MD5 SHA1 SHA512 SSDEEP

Submit Download

msBWTJWylN8drcu.exe

Path C:\Users\Admin\AppData\Local\Temp\msBWTJWylN8drcu.exe
Size 25KB
SHA256 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
MD5 abbd49c180a2f8703f6306d6fa731fdc
SHA1 d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA512 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
SSDEEP 384:OSZ/JKNZKZCGRHJPth4VKAvDgDJgoku8:OSQQTRJPzkKAEN
MD5 SHA1 SHA512 SSDEEP

Submit Download

CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
MD5 66df4ffab62e674af2e75b163563fc0b
SHA1 dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA512 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT:ZhpAyazIlyazT
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3512-8-0x0000000000400000-0x000000000040D000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads