90c4e94c7a8dac3584717c07f38e13b57ceb62356586a7089de34a5a100d0ec8

Analysis

max time kernel
66s
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 10:12

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General

Target

2024-04-28_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exe
Size

71KB
MD5

ab7824f38f49e2dec840aeb54f5f70cc
SHA1

62a5057a172a446d64518f8ca5cf82bcfdcf7c65
SHA256

90c4e94c7a8dac3584717c07f38e13b57ceb62356586a7089de34a5a100d0ec8
SHA512

92b1c0a5bb50a2f10824ed285d909bc01b2fb1b3e46a2c4142986bef97df45f41b343e5c8e00abb278a6de9a4d28cce486d11f22a2dc4314a129b912645c36b2
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT5:ZhpAyazIlyazT5

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1188 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
1188	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_ab7824f38f49e2dec840aeb54f5f70cc_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_ab7824f38f49e2dec840aeb54f5f70cc_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_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4320 2024-04-28_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exe
Token: SeDebugPrivilege 1188 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4320	2024-04-28_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exe
Token: SeDebugPrivilege	1188	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exe

description	pid	process	target process
PID 4320 wrote to memory of 1188	4320	2024-04-28_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exe	CTS.exe
PID 4320 wrote to memory of 1188	4320	2024-04-28_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exe	CTS.exe
PID 4320 wrote to memory of 1188	4320	2024-04-28_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_ab7824f38f49e2dec840aeb54f5f70cc_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4320

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:1188

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
392KB

MD5
61a642009c933d9b79daa8dc67fbfac6

SHA1
ca5cd8854664c6b98ebae5396dfd212fb4d51813

SHA256
9a141ec727be03ce6f6c56ae8811976d4c5edef75059e82aa5d782c9d632ceb1

SHA512
3b891c904979283d813069437c8b83938ad2b9a4cb5c6b547c6f00bd352ca21726dce99fc7043d6d60784f85c6fd47f0954e5453f8581acbb10d3358353b1cfa

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C:\Users\Admin\AppData\Local\Temp\QUtl7bfduZJ3z3L.exe
Filesize
71KB

MD5
82b05f5a0ea66e5e49caf7261c7337be

SHA1
0b3c5e2e32ad5a080132cd0eea44fde06451eb27

SHA256
9f65027f34f80bb6cf9c4d0d87441ea70ea22447f601c77287bd7a73c1bc604c

SHA512
51bf24d9ec1a5c9e718ed9a50eb5accfe6a28c3a7934eb1027a7daf547eca89ba370220b0403368edf1ad06d2824d0467336fc7a4325fb7561e98a99f6fea3c8

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit