2c88ab44e641076f484808752229729163e200b9137dd417a8d174075902e1f5

Analysis

max time kernel
131s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 22:14

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General

Target

2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe
Size

71KB
MD5

c9d2725ba3321b45c0cde2c13b6af927
SHA1

75bfc4bf942d0f6a329041f96721df70721f11bf
SHA256

2c88ab44e641076f484808752229729163e200b9137dd417a8d174075902e1f5
SHA512

f542d7aa66aaaa1e24352448bcb4e5b363f4ba3c7e46d5d6eb40fd96696e03556763336de10bf193cae60beddef1c0f347c3f70a910ee47b40e243522d7597c3
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTcE:ZRpAyazIliazTL

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4228 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

pid	process
4228	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_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

Processes:

2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4828 2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe
Token: SeDebugPrivilege 4228 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4828	2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe
Token: SeDebugPrivilege	4228	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe

description	pid	process	target process
PID 4828 wrote to memory of 4228	4828	2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe	CTS.exe
PID 4828 wrote to memory of 4228	4828	2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe	CTS.exe
PID 4828 wrote to memory of 4228	4828	2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_c9d2725ba3321b45c0cde2c13b6af927_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4828

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:4228

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
4959851d42037251b2f86724e8c021f3

SHA1
25c0353ea9161184932f1dbef40ab94ff4bc101f

SHA256
4f2eda069aef717172cca31433c61c2b8f4a602e473b2c1bc28484a6645d2ac5

SHA512
bbd5f9e94ad05ef21e7f2e0958478d66c468fb2ca91a2834d46f352be55c85ae9830201f354f876109bc5be5e200c4abc4984f97ce04a59c3b70dd80f92bac94

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C:\Users\Admin\AppData\Local\Temp\Wq2Sahy9zxZIMhJ.exe
Filesize
71KB

MD5
62a7509a089bc2992908bac688d8ad9a

SHA1
cd0f0c6022c1587884b2cb2ad4b7023923d64a9c

SHA256
e1fd55bed0339af6a69be9965140b2bf31d05ffc4ba3f8cf6739866bca2a4ab7

SHA512
fc0bb0c406d888521df3ab5da6acfe3c75fb3ccff2a6586d84a9b227490557cf0c26a87c474528fc604854dfa9bb035ee79fe6b7f0a792ff3a1ce24539bdec19

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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