9d90ce5e4bfcfa4801f3edb2f40f081ad4da2329359fed1dcbd4ffc51507d3a9

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 19:35

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General

Target

2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exe
Size

71KB
MD5

ddceec2787c1805a8ce892ec7d22aee4
SHA1

7eb5951e28229e2f599f4e74184f2211056ff370
SHA256

9d90ce5e4bfcfa4801f3edb2f40f081ad4da2329359fed1dcbd4ffc51507d3a9
SHA512

1c6302b98168c0a1eda0343c7d51451b8f438454e3b066f0931ad337ab21271190dc3ad10027e2548dd13549fd760f01ed2424276c45982b00f34f8d898aa5ad
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTG:ZhpAyazIlyazTG

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4812 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

pid	process
4812	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_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

Processes:

2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2028 2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exe
Token: SeDebugPrivilege 4812 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2028	2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exe
Token: SeDebugPrivilege	4812	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exe

description	pid	process	target process
PID 2028 wrote to memory of 4812	2028	2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exe	CTS.exe
PID 2028 wrote to memory of 4812	2028	2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exe	CTS.exe
PID 2028 wrote to memory of 4812	2028	2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_ddceec2787c1805a8ce892ec7d22aee4_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2028
- 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:4812

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
789KB

MD5
cbfe33559eaddb8b6c36106b04c098cc

SHA1
8a0bad59fbc29683fb0d0a65c34dd3bdeca786e4

SHA256
5ee3340b6cdfb9c16fb910df367538208053aede7bed8d85f9c6ac3c5e33337b

SHA512
6c649665202b1fcd8536bedff28d869260267c813250f0579dddae29122edf84a96e91b6f97da7a81795f1d46b26da84fc47441047369dc3742a6ef31615478e

Download Submit
C:\Users\Admin\AppData\Local\Temp\56pbXuaZIFvq2t3.exe

Filesize
71KB

MD5
1a29473264541594e117bfe47cc2a5bd

SHA1
0272bf35f3fa68061204337e686e7f97ca38fe01

SHA256
0db15133a81dd39c9a9d169c8fee436940b5b71395c85fb8ff89aed9c4d31cf2

SHA512
a4ae9f5feb33567f30c676019124ed78f6456f2250b21dda84629985193957a3bcfd19e3e9827337b24f3627cd1cfc2bcc32009718446d0f9dac720087ed5f8a

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit