90ecb39b66c300d8dec72e3eada3ed936d5caa6855c20f4191629fa81ca088b4

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
27-05-2024 06:26

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General

Target

2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exe
Size

71KB
MD5

2742d56a7a2a5b906c723ae86d5309e1
SHA1

e91dc1a8515f4f13e6277c7c308a61c74496234a
SHA256

90ecb39b66c300d8dec72e3eada3ed936d5caa6855c20f4191629fa81ca088b4
SHA512

9b683ae96f8ea2f6cfcee1124c6977aa32b2adc7e0de1419156a4cbfc219858993daf52efb0968605532f9500ccc7ee723764202d1777f43bce3c60dfeb9359a
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTle:ZhpAyazIlyazTQ

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2720 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
2720	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_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:

2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3256 2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exe
Token: SeDebugPrivilege 2720 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3256	2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exe
Token: SeDebugPrivilege	2720	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exe

description	pid	process	target process
PID 3256 wrote to memory of 2720	3256	2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exe	CTS.exe
PID 3256 wrote to memory of 2720	3256	2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exe	CTS.exe
PID 3256 wrote to memory of 2720	3256	2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_2742d56a7a2a5b906c723ae86d5309e1_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3256

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:2720

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

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

Filesize
392KB

MD5
b39a93e1d730f5938233575df50b143c

SHA1
9819d6b0f9bebd4352789a57ec489722e9836a4f

SHA256
002982a5feed715a2ce60ff5f70b763e6fc41e65dd02e6e94908c109c144bd64

SHA512
248a8514e254187cb47904b2d135f742bee7e31ab40aa75151c8483a0d69c029c772f7a1d298749c5c9d8d5d9683aa24175af217ee6f346e18264dbe3f36dd71

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C:\Users\Admin\AppData\Local\Temp\6bc4hiWifUwpQNn.exe

Filesize
71KB

MD5
d1e60800f525a6ac7c97f439f331cd75

SHA1
96a131347ea164a4dbde58ac094d84d3d17288eb

SHA256
8882d6eebe4673ea345ab2f8cb88f81b46d6aa9d9e8e2403fe53f89aad9b07e4

SHA512
6eb2fd66b87acb0e83c2a5b76b72e2909cb7eba0bf286cdc55e4b347e72d1d53cfe6192bc09138409eddeeb4c8822b295285bd1a2bfcaa4bb9c9d8adb3d0fa29

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C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit