b8821b04205634de7defb29d4e2d1c212b35043177cea00c07b2f1284734991a

Analysis

max time kernel
66s
max time network
50s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 03:41

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General

Target

2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe
Size

332KB
MD5

88418d70b2d47bf926cb1ae0e1a22630
SHA1

1b29961fba93dad90ee9b67a18a5827bdf254a73
SHA256

b8821b04205634de7defb29d4e2d1c212b35043177cea00c07b2f1284734991a
SHA512

d617ad22b055df21d4cc5020652f5a3e77af859f314f38cc589a49c74b04313ef63501c2b3d2a37a67a51a5c27504895c595d73d813ae6eea09ef902862d1ac0
SSDEEP

6144:hZMazt7P9IZWPIa5VTKpwL4Pz6w5Bt3I3j7r1S5lVZ7tpzk1oyb+boVyZY18DX1G:hS0tr95Ia5mws6w5Bt3I3jn1Sr3zYbY4

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

9K19ez2atcLAp8P.exeCTS.exe

pid process

4124 9K19ez2atcLAp8P.exe
116 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
4124	9K19ez2atcLAp8P.exe
116	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_88418d70b2d47bf926cb1ae0e1a22630_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_88418d70b2d47bf926cb1ae0e1a22630_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_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3916 2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe
Token: SeDebugPrivilege 116 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3916	2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe
Token: SeDebugPrivilege	116	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe

description	pid	process	target process
PID 3916 wrote to memory of 4124	3916	2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe	9K19ez2atcLAp8P.exe
PID 3916 wrote to memory of 4124	3916	2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe	9K19ez2atcLAp8P.exe
PID 3916 wrote to memory of 116	3916	2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe	CTS.exe
PID 3916 wrote to memory of 116	3916	2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe	CTS.exe
PID 3916 wrote to memory of 116	3916	2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_88418d70b2d47bf926cb1ae0e1a22630_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3916

C:\Users\Admin\AppData\Local\Temp\9K19ez2atcLAp8P.exe
C:\Users\Admin\AppData\Local\Temp\9K19ez2atcLAp8P.exe
2⤵
- Executes dropped EXE
PID:4124

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:116

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
394KB

MD5
3954afb707a5a664e2f84077d36cfb63

SHA1
5f25d605156e471cf382194cb20bf530731b28ae

SHA256
fbdb6f0505bbafc180c37ab59fd329f38ca61f8eb3dd353e410c0a2704fe71f4

SHA512
baa23f038352c376cc6e58988a1ce438d4bf77ac8ddab4473e93b6fd529a3583056d67885001c82ad6a358690548ab5b43bbbd276625bb546dfae1c150941cf3

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C:\Users\Admin\AppData\Local\Temp\9K19ez2atcLAp8P.exe
Filesize
332KB

MD5
d11580ae76a946ad3fc4bb7f2dcf2bb6

SHA1
22a24736e24ca9452b1dbefc4d4cbee7ed8e70ce

SHA256
ccda488ef4558861443ae9e7093c94e2bb54adaa7554ce76a0eabaa120350902

SHA512
030dfac5dd79d3f6eb86d6f317c1c6529de4a49ece02bd014e8e354899dee75564de84d1ced9e844209c8955a3474d7229a41d969362c5a6a4e0a361edf07575

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C:\Users\Admin\AppData\Local\Temp\9K19ez2atcLAp8P.exe
Filesize
261KB

MD5
9dce6a120d094e5c925b967c4bb36277

SHA1
1ab60840e8d8ed14619fab2d1559f989f01f01a9

SHA256
3052784f3683c2bbe95f59560eb311e75f1eac7aa5476a91bbd9fe4d2aef880a

SHA512
20a7a4b8ecb1262ed730c8299ad0ada2ad93327f0886e5fdefc89564ff7510595ec53ac5aa88747e0548315c3037125d83756e3ae4d9a813cc553c12991c94df

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

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit