a4cfa794cb3aaee018fc2977efe08a013a1b1aa6d5f05ce33e110689e326e0dd

Analysis

max time kernel
140s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
16/05/2024, 10:28

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General

Target

2024-05-16_3235842e545be8f633812fd36132a37d_bkransomware.exe
Size

135KB
MD5

3235842e545be8f633812fd36132a37d
SHA1

31894b9499251510e80b3f4b3ed6020feba05c73
SHA256

a4cfa794cb3aaee018fc2977efe08a013a1b1aa6d5f05ce33e110689e326e0dd
SHA512

718c83bc8477544a0e19103d2c51e3fe8ac0ddd5d1fcf51ba272dea9b888ccf2c1f632b1dae65611e0f3d6262b53ad904814943362ba2460470a58831575ce48
SSDEEP

3072:ZRpAyazIliazTUzujtxg0Lukqb8KGKTPNzYrzS:xZ8azkujtx9LuvwKGKTPNzKS

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2724	JeJyZ8Q8vAfEWpk.exe
2452	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"	2024-05-16_3235842e545be8f633812fd36132a37d_bkransomware.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-05-16_3235842e545be8f633812fd36132a37d_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4392	2024-05-16_3235842e545be8f633812fd36132a37d_bkransomware.exe
Token: SeDebugPrivilege	2452	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4392 wrote to memory of 2724	4392	2024-05-16_3235842e545be8f633812fd36132a37d_bkransomware.exe	85
PID 4392 wrote to memory of 2724	4392	2024-05-16_3235842e545be8f633812fd36132a37d_bkransomware.exe	85
PID 4392 wrote to memory of 2724	4392	2024-05-16_3235842e545be8f633812fd36132a37d_bkransomware.exe	85
PID 4392 wrote to memory of 2452	4392	2024-05-16_3235842e545be8f633812fd36132a37d_bkransomware.exe	86
PID 4392 wrote to memory of 2452	4392	2024-05-16_3235842e545be8f633812fd36132a37d_bkransomware.exe	86
PID 4392 wrote to memory of 2452	4392	2024-05-16_3235842e545be8f633812fd36132a37d_bkransomware.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-05-16_3235842e545be8f633812fd36132a37d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-16_3235842e545be8f633812fd36132a37d_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4392
- C:\Users\Admin\AppData\Local\Temp\JeJyZ8Q8vAfEWpk.exe
  C:\Users\Admin\AppData\Local\Temp\JeJyZ8Q8vAfEWpk.exe
  2⤵
  - Executes dropped EXE
  PID:2724
- 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:2452

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
395KB

MD5
ef5c07cdfa73a8e3d415147a153e2441

SHA1
e87a2b8ed8d949017cc3e3ed5682cf6046fe6c65

SHA256
ea90be52cc8cabd95bdf957295f5311f88ce2fe7e5ace2ff5afc62aa74e34db3

SHA512
a1330c941870d4017f15eb948bd775b77607178f839a81154065ffcaac16057101b845c608f25b644594cde1a523eef2766d3e4886cdc2e513ed5bdd8e2b60e8

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C:\Users\Admin\AppData\Local\Temp\JeJyZ8Q8vAfEWpk.exe

Filesize
64KB

MD5
a32a382b8a5a906e03a83b4f3e5b7a9b

SHA1
11e2bdd0798761f93cce363329996af6c17ed796

SHA256
75f12ea2f30d9c0d872dade345f30f562e6d93847b6a509ba53beec6d0b2c346

SHA512
ec87dd957be21b135212454646dcabdd7ef9442cf714e2c1f6b42b81f0c3fa3b1875bde9a8b538e8a0aa2190225649c29e9ed0f25176e7659e55e422dd4efe4c

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