de0b2f9d41b3240a9dba82fcf38cf8dd80487e09ef2fdcb7e6342d46de72d5c1

Analysis

max time kernel
67s
max time network
51s
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 19:28

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General

Target

2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe
Size

96KB
MD5

580c265cf13da7c60f901a165ef8d6f5
SHA1

e2f3685631815a7e1619e7cb057a3bb81be234a2
SHA256

de0b2f9d41b3240a9dba82fcf38cf8dd80487e09ef2fdcb7e6342d46de72d5c1
SHA512

4535f10d5970646f610098066a1bb723ee9a3f292d77af709b65f00e202abe93dd31c753243c938dea3ef32357d1592cdc1156c22eeb424d8ade703e0600ec0c
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTaSvwD5bVV4SN5sQj1:ZhpAyazIlyazTaSYN5Vx5n

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

tUnfw26AFsjmquX.exeCTS.exe

pid process

2200 tUnfw26AFsjmquX.exe
2632 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
2200	tUnfw26AFsjmquX.exe
2632	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_580c265cf13da7c60f901a165ef8d6f5_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_580c265cf13da7c60f901a165ef8d6f5_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_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4268 2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe
Token: SeDebugPrivilege 2632 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4268	2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe
Token: SeDebugPrivilege	2632	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe

description	pid	process	target process
PID 4268 wrote to memory of 2200	4268	2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe	tUnfw26AFsjmquX.exe
PID 4268 wrote to memory of 2200	4268	2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe	tUnfw26AFsjmquX.exe
PID 4268 wrote to memory of 2632	4268	2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe	CTS.exe
PID 4268 wrote to memory of 2632	4268	2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe	CTS.exe
PID 4268 wrote to memory of 2632	4268	2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_580c265cf13da7c60f901a165ef8d6f5_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4268

C:\Users\Admin\AppData\Local\Temp\tUnfw26AFsjmquX.exe
C:\Users\Admin\AppData\Local\Temp\tUnfw26AFsjmquX.exe
2⤵
- Executes dropped EXE
PID:2200

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:2632

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
392KB

MD5
62b87be2198f8b6b44b0f2c721a59f59

SHA1
c1ac736ca0c4a6f4925cb8b5bf05aee890b8edff

SHA256
57c90b4db5ba43cd4cfa141b3233fd661589b3bb3fd105ae78abc91ed5bfd953

SHA512
53aaaa9cfb69f4427f5b75625998c8e3e7daae147281aeed011dd0a3d0f602210f3b5bccb1bc843b13f95830f1eac11d93c2ba6b2b47695feb892cea59130f20

Download Submit
C:\Users\Admin\AppData\Local\Temp\tUnfw26AFsjmquX.exe
Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

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

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/2200-13-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download