2b08dc9c6e3f445eb58d4f7f64c91f9dcab863e4801f9360e35b3d0e1936d875

Analysis

max time kernel
93s
max time network
100s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
08/06/2024, 16:59

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General

Target
2024-06-08_43addcb6930f1e09a5a0aa6a994e5e1c_bkransomware.exe
Size 135KB
Sample240608-vhtdcade7t
SHA256 2b08dc9c6e3f445eb58d4f7f64c91f9dcab863e4801f9360e35b3d0e1936d875
MD5 43addcb6930f1e09a5a0aa6a994e5e1c
SHA1 6dc080ce535882780b36188b7f5f50fc0da8eb6a
SHA512 2f954ed9279130561f3c0fde01ddf07d9ac41aa50a03ba6e2002f1fc635412156bf86545fb5b6ea7cda53898ab583aa6700399df6ad45825655bd10fd56ad594
SSDEEP 3072:ZRpAyazIliazTqFO4clhcNSMQZ8LFhOyL/rqMq:xZ8azOlclGN9Qwnrzrdq
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3444	sKbXZ3fSs1IdAeU.exe
3504	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"	2024-06-08_43addcb6930f1e09a5a0aa6a994e5e1c_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	2024-06-08_43addcb6930f1e09a5a0aa6a994e5e1c_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2724	2024-06-08_43addcb6930f1e09a5a0aa6a994e5e1c_bkransomware.exe
Token: SeDebugPrivilege	3504	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2724 wrote to memory of 3444	2724	2024-06-08_43addcb6930f1e09a5a0aa6a994e5e1c_bkransomware.exe	82
PID 2724 wrote to memory of 3444	2724	2024-06-08_43addcb6930f1e09a5a0aa6a994e5e1c_bkransomware.exe	82
PID 2724 wrote to memory of 3444	2724	2024-06-08_43addcb6930f1e09a5a0aa6a994e5e1c_bkransomware.exe	82
PID 2724 wrote to memory of 3504	2724	2024-06-08_43addcb6930f1e09a5a0aa6a994e5e1c_bkransomware.exe	83
PID 2724 wrote to memory of 3504	2724	2024-06-08_43addcb6930f1e09a5a0aa6a994e5e1c_bkransomware.exe	83
PID 2724 wrote to memory of 3504	2724	2024-06-08_43addcb6930f1e09a5a0aa6a994e5e1c_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-08_43addcb6930f1e09a5a0aa6a994e5e1c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-08_43addcb6930f1e09a5a0aa6a994e5e1c_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2724
- C:\Users\Admin\AppData\Local\Temp\sKbXZ3fSs1IdAeU.exe
  C:\Users\Admin\AppData\Local\Temp\sKbXZ3fSs1IdAeU.exe
  2⤵
  - Executes dropped EXE
  PID:3444
- 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:3504

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 51b82149a035aac61650391bf3644f485ffeaca4c3eaf65558470b40ada1054a
MD5 45fd2b3022f2b7758a1810692435ba7a
SHA1 4a6f274c9b2c334dc2bbea5d03963b747d0966a5
SHA512 399fe4020e682dd719b650e4c5847d40b009ce07306ce65f73a050e8c5449b528d7ffde0b8279502d560e56db7d77338994a870a8e3d203b26d55d0334b06f54
SSDEEP 12288:xC0PTu96oeHoV+pWLCTiJUMHkC7nwotuhv:Dq6oeb0QiJerotu5
MD5 SHA1 SHA512 SSDEEP

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sKbXZ3fSs1IdAeU.exe

Path C:\Users\Admin\AppData\Local\Temp\sKbXZ3fSs1IdAeU.exe
Size 64KB
SHA256 5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160
MD5 e97c622b03fb2a2598bf019fbbe29f2c
SHA1 32698bd1d3a0ff6cf441770d1b2b816285068d19
SHA512 db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d
SSDEEP 768:nMgEYaPKRsVvd7M826QXqVXDjPXHyRhQcBU+zGqJS967GMctEvdGA9SYxQ:Mg/6/tM8NXDjPX0QWlfGMckTQ
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