efe34fec097c9d0abd6586238e87c81fe5c858432f6cfc3b3f4d7d2c497aede1

Analysis

max time kernel
134s
max time network
103s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 21:52

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General

Target

2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exe
Size

71KB
MD5

a6986119a8ce3f27239a777542273d8c
SHA1

a2651fce15380f7a14524ba6439fe5fb66ef69f8
SHA256

efe34fec097c9d0abd6586238e87c81fe5c858432f6cfc3b3f4d7d2c497aede1
SHA512

470ed3f825a751aa76dc49a1d1e3002c4514ec601e55e3548511adb14c0f8739210cb7fad73cbd6922e301a41e10605fa10805ff2cccf5122560d4c27caeae4d
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT1:ZRpAyazIliazT1

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1056 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
1056	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-22_a6986119a8ce3f27239a777542273d8c_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:

CTS.exe2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exe

description ioc process

File created C:\Windows\CTS.exe CTS.exe
File created C:\Windows\CTS.exe 2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2508 2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exe
Token: SeDebugPrivilege 1056 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exe

description	pid	process
Token: SeDebugPrivilege	2508	2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exe
Token: SeDebugPrivilege	1056	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exe

description	pid	process	target process
PID 2508 wrote to memory of 1056	2508	2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exe	CTS.exe
PID 2508 wrote to memory of 1056	2508	2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exe	CTS.exe
PID 2508 wrote to memory of 1056	2508	2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_a6986119a8ce3f27239a777542273d8c_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2508
- 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:1056

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

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

Filesize
392KB

MD5
6fcf6e7b1b5ef8fd8c4f4aa2dafb083a

SHA1
86a54981b9821090c86873326cb5b71b9108d1db

SHA256
db66842db1e8e2bbbedca63f6816fed84199666ea36e54be691d8df2e700264f

SHA512
b7bb37ccf11d2e82af817f7260b815392839a4a4a3bc465c1f3033aa089ae3210505ad79d754a378a95f7236ad1fdb8fab0788ea35164c47bd73179c86e15b04

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

Filesize
71KB

MD5
13467ee87c41d107de3b0e5502df0cf2

SHA1
6f6dd60074a9729c6b2acacf5ef05efdfecbf04b

SHA256
afa969bd0cdfa0b5e78819968fe2f8028f3009da3050fefe2e440c5c3f3566b9

SHA512
23d9afb785f126c5f8a9ad88a637a70c6a7880087677bef35d5fd96bc43d1817114b4740d1b8e4f150bf7d67b1a69a648c7837f633b1aa0129da285a7745e1d8

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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