22ebbe56ebc6132337779f73a77a4350ea4e1a64146973de4dab8e94969c2a89

Analysis

max time kernel
141s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
25/04/2024, 02:33

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General

Target
2024-04-25_378930e335484108b119956be486ffb7_bkransomware.exe
Size 71KB
Sample240425-c2a21adf93
SHA256 22ebbe56ebc6132337779f73a77a4350ea4e1a64146973de4dab8e94969c2a89
MD5 378930e335484108b119956be486ffb7
SHA1 1d346a86fd76e30a3399ebc42416d21800823609
SHA512 106c5141e27485b198b8e8bec1cc958672dc36a9699295e5ffedab0b928f33c85daccb43bfd9dc95b95a38e1ba4f9d9d3d6a0e8b6fe427af27648deadf75c074
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTw:ZRpAyazIliazTw
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2876	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"	2024-04-25_378930e335484108b119956be486ffb7_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	2024-04-25_378930e335484108b119956be486ffb7_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	636	2024-04-25_378930e335484108b119956be486ffb7_bkransomware.exe
Token: SeDebugPrivilege	2876	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 636 wrote to memory of 2876	636	2024-04-25_378930e335484108b119956be486ffb7_bkransomware.exe	84
PID 636 wrote to memory of 2876	636	2024-04-25_378930e335484108b119956be486ffb7_bkransomware.exe	84
PID 636 wrote to memory of 2876	636	2024-04-25_378930e335484108b119956be486ffb7_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-25_378930e335484108b119956be486ffb7_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-25_378930e335484108b119956be486ffb7_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:636
- 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:2876

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

msoia.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\msoia.exe_Rules.xml
Size 71KB
SHA256 2a2bb3458f760b6bb72dbb719e2f66d4fe007817f8af83042d62362d1bd6246b
MD5 009aca9d70083a7f58268c2a5480d4fe
SHA1 3d7ae12c9ce8534acf3aafdcf77bb95ea0fea6f4
SHA512 b488c8688fbda21e482e4bf98db6b1fcbbe11251530c558a4078102fb485b5dc94abb87497eb3dc1c0d505629b8d02c3047ff22a00de4000a9d44789b07e0153
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTM:ZRpAyazIliazTM
MD5 SHA1 SHA512 SSDEEP

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SmWZJEzD8buji4y.exe

Path C:\Users\Admin\AppData\Local\Temp\SmWZJEzD8buji4y.exe
Size 71KB
SHA256 93c856cedd52a9fc853d8344da69e91c7a2b3fdd1230aab6a5a58536dac69a80
MD5 ef01c8e25a0265b0c40bbb01ff6b7c9f
SHA1 6bfd3920f3114853b613ea5fa4d7246d0ff030a2
SHA512 7b1e72bc562744cab43bbfcb25bbd233ad5d9e5430c9fe6620482badf2500be3aa69c5c77430ab1993469475657a7b01006efc14235c55c5323c1ba6c1647c3f
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTx:ZRpAyazIliazTx
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