ec7141a3a0fb7b791e2441cc154f2572a333700ce79fa476ea52bce6f8208718

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2024, 10:29

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General

Target
2024-05-31_3c68ffb7fe05c98c9ea89489360fbe0b_bkransomware.exe
Size 71KB
Sample240531-mjeycaef7s
SHA256 ec7141a3a0fb7b791e2441cc154f2572a333700ce79fa476ea52bce6f8208718
MD5 3c68ffb7fe05c98c9ea89489360fbe0b
SHA1 36356552c0c683d3b229750d5490009c32793def
SHA512 fdc8a8019a9cab176ea0ff5de783c53d15d9c3106f23356cc8f681e601df4d2a5244860a8a948dc86837e93bf2fc1d5bd6998b92396d73f65c76e8c45c156f0a
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTKizF:ZRpAyazIliazTp
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
5108	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"	2024-05-31_3c68ffb7fe05c98c9ea89489360fbe0b_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	2024-05-31_3c68ffb7fe05c98c9ea89489360fbe0b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3596	2024-05-31_3c68ffb7fe05c98c9ea89489360fbe0b_bkransomware.exe
Token: SeDebugPrivilege	5108	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3596 wrote to memory of 5108	3596	2024-05-31_3c68ffb7fe05c98c9ea89489360fbe0b_bkransomware.exe	85
PID 3596 wrote to memory of 5108	3596	2024-05-31_3c68ffb7fe05c98c9ea89489360fbe0b_bkransomware.exe	85
PID 3596 wrote to memory of 5108	3596	2024-05-31_3c68ffb7fe05c98c9ea89489360fbe0b_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-31_3c68ffb7fe05c98c9ea89489360fbe0b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_3c68ffb7fe05c98c9ea89489360fbe0b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3596
- 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:5108

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 7fb23a686c5b2aa5e638f76d0d5718cf1a27daee37dcc01fdde63dc68f69a8f2
MD5 441d69945bbee3109cf270befe5f00d2
SHA1 555a4939b914ec126543985268849821c72201e7
SHA512 a3153de65c0f012006b2ffc50156a1f012c8d7d509299ae22afb7916899f9edcbb2276a5bf5df27fa8272fd9d96c927d2ce21c16317ff70d913948dbf80dd1c2
SSDEEP 6144:xZ8aziefEKY022LM1yo5E1PDSQg6mTq1IgIQkyWnZdXY3QK4LJrzfvoPVDSf+:xC0fM7R2LsFJqSgvR4LFzn+
MD5 SHA1 SHA512 SSDEEP

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MR8M7wPCicYHM8c.exe

Path C:\Users\Admin\AppData\Local\Temp\MR8M7wPCicYHM8c.exe
Size 71KB
SHA256 12920f96be24b8493ac9a0d4c65dd651b318c12cfe5922c454b6e2fe05977630
MD5 cd013f0c5f90848cd85b00ad8dc66cea
SHA1 a3125d585ee5ee64354c584418fb3352845379b1
SHA512 275cd5c8478907a4931ff9ccf3151b5bd993eb30105472fc2c8be67bb15d20c87a5a9ef457f03088d41f5c78fa200e3920016ab75e872f74b7d53fa956314f5c
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTM:ZRpAyazIliazTM
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