4486d0ce4108c9225f7c30d88bfdf59b5430eb2e9eeff3d3ac87fe5ec58ea0c0

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
31/05/2024, 04:52

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General

Target

2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe
Size

159KB
MD5

76f99904ea9b2509e8bba0e22e7c5de3
SHA1

1d3147593c9e2d3d2254db49531ccef209657622
SHA256

4486d0ce4108c9225f7c30d88bfdf59b5430eb2e9eeff3d3ac87fe5ec58ea0c0
SHA512

14eacb757953ea3b3ea9fac35f5d77ae3f8cdc8c8abd3848b1b32e21630fa177b5bdb2353789c76718ab492cfc09168858845147e0de35c4658702047c0ebe05
SSDEEP

3072:ZRpAyazIliazTkXi3sGI1VZQlF2gBu/DlzE:xZ8azh3pk3Q3ZuBzE

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2236	zcDE9DldToUACwQ.exe
2756	CTS.exe

Loads dropped DLL 1 IoCs

pid	Process
2896	2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.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"	2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2896	2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe
Token: SeDebugPrivilege	2756	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2896 wrote to memory of 2236	2896	2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe	28
PID 2896 wrote to memory of 2236	2896	2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe	28
PID 2896 wrote to memory of 2236	2896	2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe	28
PID 2896 wrote to memory of 2236	2896	2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe	28
PID 2896 wrote to memory of 2756	2896	2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe	29
PID 2896 wrote to memory of 2756	2896	2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe	29
PID 2896 wrote to memory of 2756	2896	2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe	29
PID 2896 wrote to memory of 2756	2896	2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_76f99904ea9b2509e8bba0e22e7c5de3_bkransomware.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2896
- C:\Users\Admin\AppData\Local\Temp\zcDE9DldToUACwQ.exe
  C:\Users\Admin\AppData\Local\Temp\zcDE9DldToUACwQ.exe
  2⤵
  - Executes dropped EXE
  PID:2236
- 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:2756

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\Temp\zcDE9DldToUACwQ.exe

Filesize
88KB

MD5
4a895ec6c5a9df94820219ef525cf65a

SHA1
525dd15cdeec20966d61c5f0a81667cd931349cb

SHA256
949b6765d794c53656c9afc45b90d9a2cfcae6bb30444086b29225f19242217b

SHA512
a830996a8aae3d25bd21283f4f19ea295d6caa31ab98d14f5bacc15fee64264170348ca03c7bd390e6107274fb91923e24f4c6a6dca09a5354ae47d4109ed611

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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

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Downloads