5a38d404102e8441d24e705780889b48fd242b88867cf2debead987cf3611026

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 16:40

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General

Target

2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe
Size

174KB
MD5

b56ae20acf9f0f501640d831f651c0b4
SHA1

5f51204a0d60d54e476df951f974ad33855a409e
SHA256

5a38d404102e8441d24e705780889b48fd242b88867cf2debead987cf3611026
SHA512

f79a122cc9c5eb3dd581a277aed2975b499a64cc99d6a7ee07bd5bcc4aaf30ff0baac41e64f7ce66ce555337d04411d4303368996e7a659c87ee8ae5543df62d
SSDEEP

3072:ZhpAyazIlyazTbkHdnBUGli30f7B2AO8MP0zEPTs2mJY12Bor:hZMaz+BUuFfgctEo2v1yw

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

Gpto5wFpfccL9eM.exeCTS.exe

pid process

3012 Gpto5wFpfccL9eM.exe
632 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
3012	Gpto5wFpfccL9eM.exe
632	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_b56ae20acf9f0f501640d831f651c0b4_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:

2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 448 2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe
Token: SeDebugPrivilege 632 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	448	2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe
Token: SeDebugPrivilege	632	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe

description	pid	process	target process
PID 448 wrote to memory of 3012	448	2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe	Gpto5wFpfccL9eM.exe
PID 448 wrote to memory of 3012	448	2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe	Gpto5wFpfccL9eM.exe
PID 448 wrote to memory of 632	448	2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe	CTS.exe
PID 448 wrote to memory of 632	448	2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe	CTS.exe
PID 448 wrote to memory of 632	448	2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_b56ae20acf9f0f501640d831f651c0b4_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:448

C:\Users\Admin\AppData\Local\Temp\Gpto5wFpfccL9eM.exe
C:\Users\Admin\AppData\Local\Temp\Gpto5wFpfccL9eM.exe
2⤵
- Executes dropped EXE
PID:3012

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:632

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
392KB

MD5
4f3cd19586d99d60dd8084de94c925e8

SHA1
8971eed6c77533120fcb0987ee6ef1a05dcdc87c

SHA256
53e80b0526c9c8bf394810ed2cf334cc910cd4284739597ab5d84d7336d6d78d

SHA512
81a3e0e254c6102c1ccf2de5ea1211396479e16360475982fc1610b4a7a8bd08611faf0f1b78e338c30ee7c05536577abd6bf8bca9873c8f3f287d3b926dc4b9

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C:\Users\Admin\AppData\Local\Temp\Gpto5wFpfccL9eM.exe
Filesize
103KB

MD5
40e6081a84568a750c469df520dd0ae1

SHA1
fcc160e9f213a7ce674861c9f4efab2b9f0b13d5

SHA256
b33db48ce11539130b143caa2eec3a38c439de13a2aeffed07cb9b89bcc82fd4

SHA512
91feb528a2c033d0f5261a6c244b640a988d1a42caf0b8bd144a458555a1172e9ac7b23d2ff9304366559008cf3f92445ce59398a3756c0ed3ef343b824f82a2

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit