cdcdc988e934b722671489420b2ea7ab82a7a4972b855716d644482336e6520a

Analysis

max time kernel
135s
max time network
103s
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 07:52

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General

Target

2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exe
Size

71KB
MD5

42f6b6fa9494b07851589d1cc1c3dea2
SHA1

2bb915d1bb87a81f2daf164b7d58ce9be554ed29
SHA256

cdcdc988e934b722671489420b2ea7ab82a7a4972b855716d644482336e6520a
SHA512

8b058e151e39541d9bba75e713ef737b4ddcc6d445a87070bdeff776092e287d18f3968ded20edea8f4c6e139f669a712c4e793ff92b6d0beafa3cd144c3fb54
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTrhl:ZhpAyazIlyazTrhl

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1320 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
1320	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_42f6b6fa9494b07851589d1cc1c3dea2_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_42f6b6fa9494b07851589d1cc1c3dea2_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:

2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2980 2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exe
Token: SeDebugPrivilege 1320 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2980	2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exe
Token: SeDebugPrivilege	1320	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exe

description	pid	process	target process
PID 2980 wrote to memory of 1320	2980	2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exe	CTS.exe
PID 2980 wrote to memory of 1320	2980	2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exe	CTS.exe
PID 2980 wrote to memory of 1320	2980	2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_42f6b6fa9494b07851589d1cc1c3dea2_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2980

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:1320

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
a02a22a0da73c4ebbc87c3a57117519f

SHA1
c05694ba12e0a1bd434ab1e4011d3b65dd79c922

SHA256
9336e22199044e62ca9fe577f94ad5c6fb5df68664d995096befaecfdf91f308

SHA512
f3774d4285be8a28287b9811bb0acbcd3ea87e27d7d00f3ea2cd646b69b33990c6fb5d44883f0cc31f60c43ea944f1c5062fd682a6e5749b677f49fb9494e1ee

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C:\Users\Admin\AppData\Local\Temp\m9j6zfVjseI3Dcz.exe
Filesize
71KB

MD5
5029b14ee9c437ba62a3f4d61bb27628

SHA1
74c62e6156c78b8c63ec073c6aa6873b37f3ba49

SHA256
f30df658cfc9e6167f4411205058eb6547049f4918b0b30d5ebb7a69d5a47421

SHA512
aea5312c9ad577ddbaadcf5ad9ead2e31a84155eceb4d434cc1165fa7e454da2fc81455ff6006d56d65d59c3c323d8d96ead0311013de9ff7cbebf13c582c745

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit