fd69be68cd5ca7efd879b49f80f4b7a6cc983b18802bcb2f32a8281d13350db0

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:28

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General

Target

2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe
Size

96KB
MD5

24322deab767a6c3a8c92a8cc22caae6
SHA1

7f059764e49d92995f92a84f75589d42205197d7
SHA256

fd69be68cd5ca7efd879b49f80f4b7a6cc983b18802bcb2f32a8281d13350db0
SHA512

5c2cc5eeb9a340404f4fb6c8ea5ec242bb01397e563fc0de7a34b4f6978f7013d908b10b5ea0f4bc33d3fe9ec45f70aac3430b7b0bab747d22b61d0f3f53dab7
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTJ6pC2VoRfpkjuUvkF:ZRpAyazIliazTJ6pC2Vgf2uUvkF

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

AjShblm4r49d3W8.exeCTS.exe

pid process

1156 AjShblm4r49d3W8.exe
2680 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
1156	AjShblm4r49d3W8.exe
2680	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-23_24322deab767a6c3a8c92a8cc22caae6_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:

CTS.exe2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe

description ioc process

File created C:\Windows\CTS.exe CTS.exe
File created C:\Windows\CTS.exe 2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1704 2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe
Token: SeDebugPrivilege 2680 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe

description	pid	process
Token: SeDebugPrivilege	1704	2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe
Token: SeDebugPrivilege	2680	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe

description	pid	process	target process
PID 1704 wrote to memory of 1156	1704	2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe	AjShblm4r49d3W8.exe
PID 1704 wrote to memory of 1156	1704	2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe	AjShblm4r49d3W8.exe
PID 1704 wrote to memory of 2680	1704	2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe	CTS.exe
PID 1704 wrote to memory of 2680	1704	2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe	CTS.exe
PID 1704 wrote to memory of 2680	1704	2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_24322deab767a6c3a8c92a8cc22caae6_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1704

C:\Users\Admin\AppData\Local\Temp\AjShblm4r49d3W8.exe
C:\Users\Admin\AppData\Local\Temp\AjShblm4r49d3W8.exe
2⤵
- Executes dropped EXE
PID:1156

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:2680

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

Replay Monitor

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Downloads

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

Filesize
394KB

MD5
d6a4e1919389d84146ae39d32795afa7

SHA1
2843f4ac21d3bb01c78013259069455f8c56d2e8

SHA256
96a1f690c6e29ea59d8c61e8ed16f92ed1d29b744d41e406f6c843fad0993c18

SHA512
115cc7c64eaa9c711652c6587986877bc3de245d5877215998d6d56f2267ac077154c92fb12e783a47bb30f7424fca9075fe0df0930d8d13e0a23a81e8abbc85

Download Submit
C:\Users\Admin\AppData\Local\Temp\AjShblm4r49d3W8.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
memory/1156-14-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download