59269fb043a3f8f4525e79547596a80485eb4cccf6afa6eb647deceb5acd260d

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
24/04/2024, 21:34

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General

Target
2024-04-24_d8f90553286bfa71d339287671a27f70_bkransomware.exe
Size 71KB
Sample240424-1e7pfsaa31
SHA256 59269fb043a3f8f4525e79547596a80485eb4cccf6afa6eb647deceb5acd260d
MD5 d8f90553286bfa71d339287671a27f70
SHA1 1d6b64f29ef764807c509e25a029c6544d9c8551
SHA512 f0fdbb4efa3e95dc7345df8bf55efece6ec90b5753692882e18b486d62b057e9b59e98d7108b456d9e72734bc244bb2ce44b5d0f85d7b2e65e8c6c90b3d66876
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTV:ZRpAyazIliazTV
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1176	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"	2024-04-24_d8f90553286bfa71d339287671a27f70_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	CTS.exe
File created	C:\Windows\CTS.exe	2024-04-24_d8f90553286bfa71d339287671a27f70_bkransomware.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4376	2024-04-24_d8f90553286bfa71d339287671a27f70_bkransomware.exe
Token: SeDebugPrivilege	1176	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4376 wrote to memory of 1176	4376	2024-04-24_d8f90553286bfa71d339287671a27f70_bkransomware.exe	85
PID 4376 wrote to memory of 1176	4376	2024-04-24_d8f90553286bfa71d339287671a27f70_bkransomware.exe	85
PID 4376 wrote to memory of 1176	4376	2024-04-24_d8f90553286bfa71d339287671a27f70_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-24_d8f90553286bfa71d339287671a27f70_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_d8f90553286bfa71d339287671a27f70_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4376
- 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:1176

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

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 394KB
SHA256 bb03c69030f1f82f43f4433489b9a9f12c622a1f61029cbdcc4450c0fc153549
MD5 85981a1f58199c2ea37a5c3216aac808
SHA1 44feac9d72801c139f6aeb0e204449be677761ca
SHA512 faeb0e229c3ab08822af2e79e442dfd65d8f387da0cbc47b9d121873b3aa337a8e48b51bc94f63facbf43caa6925ee1288c5c3d17f19e12c01767266fdb85aa6
SSDEEP 6144:xZ8az5Ju22vB18XXMAFgipfkHPeVojFZIblRnEW2uu1g09MdCzKqWCw8CtTWE8+9:xC0p2LsNF/pfkvIoRqpRnEW2zIdgsv9
MD5 SHA1 SHA512 SSDEEP

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6uGUu96JyGBRlaR.exe

Path C:\Users\Admin\AppData\Local\Temp\6uGUu96JyGBRlaR.exe
Size 71KB
SHA256 af723dac0c6b27fb11d9be6c8f9bbb017db4bd3e0f622961b06647e7fd46c936
MD5 16a3c3367bc6a40e8658e30cf975a397
SHA1 698378f96c9297c2fec73d6f614363d47d08a067
SHA512 4c8f0f0e6fc35817d6d907a486984c21f8189cc6dbe8398b1e41c40d80cfeeb85a05c86b57371682486133ff0cf0530f9e1689af0fd4ca3fc569ae8c2726aacc
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT9:ZRpAyazIliazT9
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT:ZRpAyazIliazT
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads