a1efb2ed219bc10c012cd3fbe23e384fbcf1527edcd7f6ae25839bb790905fee

Analysis

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

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
20-05-2024 14:30

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General

Target

2024-05-20_10461478d2f9b5568be8b35f3f08f30a_bkransomware.exe
Size

71KB
MD5

10461478d2f9b5568be8b35f3f08f30a
SHA1

9928ca67d60318bc76a1bc6bf0f15924619626d3
SHA256

a1efb2ed219bc10c012cd3fbe23e384fbcf1527edcd7f6ae25839bb790905fee
SHA512

432744d9390be9a536599bfb9c12493ce842fcbc616eb89cc3257055e4be576ba47eceb2b596d034bed2b2b92e7e03fddf65ba35153f7223a41a65f97c076605
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTOl:ZRpAyazIliazTU

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1256	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"	2024-05-20_10461478d2f9b5568be8b35f3f08f30a_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	2024-05-20_10461478d2f9b5568be8b35f3f08f30a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4468	2024-05-20_10461478d2f9b5568be8b35f3f08f30a_bkransomware.exe
Token: SeDebugPrivilege	1256	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4468 wrote to memory of 1256	4468	2024-05-20_10461478d2f9b5568be8b35f3f08f30a_bkransomware.exe	82
PID 4468 wrote to memory of 1256	4468	2024-05-20_10461478d2f9b5568be8b35f3f08f30a_bkransomware.exe	82
PID 4468 wrote to memory of 1256	4468	2024-05-20_10461478d2f9b5568be8b35f3f08f30a_bkransomware.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-20_10461478d2f9b5568be8b35f3f08f30a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-20_10461478d2f9b5568be8b35f3f08f30a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4468
- 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:1256

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
14bcf9dea0bb5403a28f81dacc9f8d3e

SHA1
fdaa517ff941c0910c1e632f5d01fccf2a303bb9

SHA256
f762d0350c9f4c89cbdd9e5caddd196a5b682ff6c456bf35c2fb6417f41784b7

SHA512
bc7424ad3f2514fb6d59e7e249db4fd3cbe41165d9c8d3d35b636243610e80a4ca020c7498f015b60aaa13fc36bc01c6a3c507935ce226b147ab52de4f2d8b73

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C:\Users\Admin\AppData\Local\Temp\v8NB82sLhbnseRS.exe

Filesize
71KB

MD5
06ac8ac3f63e5270b07af6f2051ced1e

SHA1
b844f00fc14093e9113380b9e65cef9dae0685f8

SHA256
22970f56c88480bbd38a9f81d492b808fcbc330b7fc7b53a867e0fcedb5df946

SHA512
be07f6c357b39ff709a0888bfcd38690e54bde7979d8a378578b7682f0b72cda4c93c37c29aa46e6b45e73eda4cc2a931c9fc627333cf638e1b55f832cb40417

Download Submit
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