692a6d8ec9a70cf626d8404d942f9519f4adc965e0d6c5d769b94db2973c8b7b

Analysis

max time kernel
67s
max time network
53s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
01/05/2024, 05:09

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General

Target

2024-05-01_af0f28daf78597c520576beeacc46d19_bkransomware.exe
Size

208KB
MD5

af0f28daf78597c520576beeacc46d19
SHA1

317e7461607089e32d418573c4eca18bbe927b02
SHA256

692a6d8ec9a70cf626d8404d942f9519f4adc965e0d6c5d769b94db2973c8b7b
SHA512

563ea5b953df87dc23a51f668f7c31077f939ab9d3284197221fb89c68603f92eaa4015830fabcf779de0689310baca828d02c16f5e09528b0d8f8621fbc73ca
SSDEEP

3072:ZRpAyazIliazT3dryxNtINDgginz4tCQx5TpV8Sx2+EsfHnwViP:xZ8azzd9Eg/D5daSMtsPwV8

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2640	fbhZjVkzv9SryY8.exe
1928	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"	2024-05-01_af0f28daf78597c520576beeacc46d19_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	2024-05-01_af0f28daf78597c520576beeacc46d19_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3068	2024-05-01_af0f28daf78597c520576beeacc46d19_bkransomware.exe
Token: SeDebugPrivilege	1928	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 2640	3068	2024-05-01_af0f28daf78597c520576beeacc46d19_bkransomware.exe	83
PID 3068 wrote to memory of 2640	3068	2024-05-01_af0f28daf78597c520576beeacc46d19_bkransomware.exe	83
PID 3068 wrote to memory of 2640	3068	2024-05-01_af0f28daf78597c520576beeacc46d19_bkransomware.exe	83
PID 3068 wrote to memory of 1928	3068	2024-05-01_af0f28daf78597c520576beeacc46d19_bkransomware.exe	84
PID 3068 wrote to memory of 1928	3068	2024-05-01_af0f28daf78597c520576beeacc46d19_bkransomware.exe	84
PID 3068 wrote to memory of 1928	3068	2024-05-01_af0f28daf78597c520576beeacc46d19_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-01_af0f28daf78597c520576beeacc46d19_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-01_af0f28daf78597c520576beeacc46d19_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Users\Admin\AppData\Local\Temp\fbhZjVkzv9SryY8.exe
  C:\Users\Admin\AppData\Local\Temp\fbhZjVkzv9SryY8.exe
  2⤵
  - Executes dropped EXE
  PID:2640
- 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:1928

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
328182815c8081be97db1fe94f9a3693

SHA1
15b3afd94bd07326f228bb2b118722afa0c98741

SHA256
0f2463152a4b4675e07840308dfc0d566e916d8cb7477e3fa411eef128e8e9f2

SHA512
ee40280ec1db2b339d2b02db6c48e99b5b02643560a9752f72c320888855842ca6f486aabc051dd77d9a5c7865360d85f0a2e8a4bdd23b3d6ce973c01389ddbc

Download Submit
C:\Users\Admin\AppData\Local\Temp\fbhZjVkzv9SryY8.exe

Filesize
137KB

MD5
32b8ad6eca9094891e792631baea9717

SHA1
5536b7532400baf27beb2bfd425159264ad71136

SHA256
9efdf94d2ec05d3dad9b39c06f98038d1d407385eff5629ba8d7a920be18da8e

SHA512
a175012b243f118eab0f571beea874503403cec1d080def788a45d36c2cb94515f8c1e278da410d07040c89d8a344e4fba98c40a9bdef7480c7ab33354fbfeba

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads