b46b8a99c7044c22d8d28ef1c750397ba8fb5bcfe9a778ddc2804fd775d45a03

Analysis

max time kernel
119s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
08-06-2024 16:23

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General

Target

2024-06-08_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe
Size

655KB
MD5

8e459953ea55d8c22ea8e8194310014f
SHA1

529a53f1e0b7e99ca6318b182dc95ce69396cf56
SHA256

b46b8a99c7044c22d8d28ef1c750397ba8fb5bcfe9a778ddc2804fd775d45a03
SHA512

fc3f9a8b7c4f5586eea4076563af3c29a0c72d7f5e04805add9134dcc5efe7fc8c7a9dc70f0b73948a3b8dbb929ae04e72fe16509c92a9e602e87413241316b3
SSDEEP

12288:xC0GAykEegQYaivLfmC7QO3gwxRENKSPIISfl0Nibo0QkeTQFffk8:DbEeXYPva7O3Fs0fvo05emfh

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
2772	UlBNZcpwJnxok1j.exe
2844	CTS.exe
1264	Process not Found

Loads dropped DLL 2 IoCs

pid	Process
2224	2024-06-08_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe
1264	Process not Found

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_8e459953ea55d8c22ea8e8194310014f_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_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2224	2024-06-08_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe
Token: SeDebugPrivilege	2844	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2224 wrote to memory of 2772	2224	2024-06-08_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe	28
PID 2224 wrote to memory of 2772	2224	2024-06-08_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe	28
PID 2224 wrote to memory of 2772	2224	2024-06-08_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe	28
PID 2224 wrote to memory of 2772	2224	2024-06-08_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe	28
PID 2224 wrote to memory of 2844	2224	2024-06-08_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe	29
PID 2224 wrote to memory of 2844	2224	2024-06-08_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe	29
PID 2224 wrote to memory of 2844	2224	2024-06-08_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe	29
PID 2224 wrote to memory of 2844	2224	2024-06-08_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-06-08_8e459953ea55d8c22ea8e8194310014f_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-08_8e459953ea55d8c22ea8e8194310014f_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:2224
- C:\Users\Admin\AppData\Local\Temp\UlBNZcpwJnxok1j.exe
  C:\Users\Admin\AppData\Local\Temp\UlBNZcpwJnxok1j.exe
  2⤵
  - Executes dropped EXE
  PID:2772
- 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:2844

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:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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\Users\Admin\AppData\Local\Temp\UlBNZcpwJnxok1j.exe

Filesize
584KB

MD5
7627ddb33671ffec78cf08066ddf45db

SHA1
6501bb294700721c17d6c6655c3cbf0fd3dfaaeb

SHA256
590a0a5cf16617bdfdaee71d8cbb4eca8f5dac99346dc0fbfea6a3a6e07ad9c5

SHA512
5e99d70991f1cb01283a8271e9caff23bcf3d7c51dc2d08f6a05fe3ae074384d9620d8e13d2d1758729d27218db25856425f121286ce7c0d363911068dd5f8c1

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads