a3653b9eac9d4bd5f8548df2aaa0344d16a0e0550ba354aebbd1fb1f2c6cc372

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 19:27

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General

Target

2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe
Size

71KB
MD5

40345618f38ce5925f9ebf3c3fe03d13
SHA1

31cd498492e6be963e2bd1289ae32c566ba833d0
SHA256

a3653b9eac9d4bd5f8548df2aaa0344d16a0e0550ba354aebbd1fb1f2c6cc372
SHA512

97ecaaed4739418dcfdc6855405571755fadc5374eedbec3918f9ad3086b4057f76edaf6ed6d577e03fe62f8bdd75ed8d9a66d15ce963b9da18affe48efde3ef
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTuQ:ZRpAyazIliazTuQ

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
952	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"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	348	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe
Token: SeDebugPrivilege	952	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 348 wrote to memory of 952	348	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe	84
PID 348 wrote to memory of 952	348	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe	84
PID 348 wrote to memory of 952	348	2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_40345618f38ce5925f9ebf3c3fe03d13_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:348
- 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:952

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
394KB

MD5
c28ce8b5e9bb78143d0ab0f9946b829d

SHA1
6fa1629f63d4bc5b98306a7334682559cb46f7b1

SHA256
87c65c142b2ce9daf71d1dfce8d1beac9f66e9575e20a1628362890ffc62b5dc

SHA512
05232ddbabca71677ffc8fd4d097ca822f712fd75c7490bf4ba56c6ec9b8c2ef504ee6706537333d1f10b78a303cff63b1536b9ce1f567aa62804d5703573521

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C:\Users\Admin\AppData\Local\Temp\DEm9JtVy7MRh2gk.exe

Filesize
71KB

MD5
a9bfab80b9f9f35d28f7dddc78359279

SHA1
0bf680d3a8f82969964da134b5b3734161c63486

SHA256
1f7d3cad752f247319981d1c851b616a19427dd1f9d23ccf8d8947cc23dde460

SHA512
091f53234c7d60eb5435e0785220e6be57f8b5a2f4f4a2cf832b1d73c2ad96aecfd38fa36be3f1a4cfdb789ef47aa4707d7ad15a1e30d9abfa0b1fcbd5fab607

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads