34cb019cecb7d1c6a9dbe2f938715b3587d8e4fa6de6efbb0065ce266d99f8b6

Analysis

max time kernel
63s
max time network
52s
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 05:28

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General

Target

2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe
Size

176KB
MD5

41e05fee3238cb7890d5c2a34f85f2fb
SHA1

be76d6ae9ebd605f9ed8d56367f411b24c0310f6
SHA256

34cb019cecb7d1c6a9dbe2f938715b3587d8e4fa6de6efbb0065ce266d99f8b6
SHA512

13a87d58b53bf654739828446da2f9e33911309140e97f47d13ad2404486ba44c919503501507aa05c687f1f50abb3b25c65061fdd5331d741d33bf738af9550
SSDEEP

3072:ZhpAyazIlyazTjpGObU0nR85BzSPC1PiNdJoYVB3JIuLOa:hZMaznEOisPC1iNdxv3muLOa

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

Ud5RZRw1p62jni9.exeCTS.exe

pid process

4508 Ud5RZRw1p62jni9.exe
4420 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
4508	Ud5RZRw1p62jni9.exe
4420	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_41e05fee3238cb7890d5c2a34f85f2fb_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_41e05fee3238cb7890d5c2a34f85f2fb_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_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4624 2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe
Token: SeDebugPrivilege 4420 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4624	2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe
Token: SeDebugPrivilege	4420	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe

description	pid	process	target process
PID 4624 wrote to memory of 4508	4624	2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe	Ud5RZRw1p62jni9.exe
PID 4624 wrote to memory of 4508	4624	2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe	Ud5RZRw1p62jni9.exe
PID 4624 wrote to memory of 4420	4624	2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe	CTS.exe
PID 4624 wrote to memory of 4420	4624	2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe	CTS.exe
PID 4624 wrote to memory of 4420	4624	2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_41e05fee3238cb7890d5c2a34f85f2fb_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4624

C:\Users\Admin\AppData\Local\Temp\Ud5RZRw1p62jni9.exe
C:\Users\Admin\AppData\Local\Temp\Ud5RZRw1p62jni9.exe
2⤵
- Executes dropped EXE
PID:4508

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:4420

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
8501a1ce7b317854ff47ae2e5028eaff

SHA1
a3ff3e191a04fb9e6dd031b325814bd17285437a

SHA256
e3b6cc673b9026bb9d824cc9ec18e569f7337f23ac90b41fac1f53c6dddeb77a

SHA512
5f2614aa3d56fed0b64192873c1f6724a21691a2c61d4f9bbdd4cffdf00e216b204f69f2745fb528fa44516d021a2e9a9539ff0f5609faf8557a837227a77c16

Download Submit
C:\Users\Admin\AppData\Local\Temp\Ud5RZRw1p62jni9.exe
Filesize
105KB

MD5
19d621a4b2d26d8fa8002548a1b04a32

SHA1
0d0c5e3b06f56ad12a77da46ab3fdab81acda628

SHA256
81a618f21cb87db9076134e70388b6e9cb7c2106739011b6a51772d22cae06b7

SHA512
78da0a9f19b4eb39db3eb678ac71e170cf279deb37282e9f3069e74c8bb2597c6067eb14810bd67f7a43ddf1395ae19157456163c88554d21a01113be34136a9

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

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads