e3c4d0909a30d5d34fc2ae49d3871b9f81ea43ecfdc4296c42fdce275e4918d6

Analysis

max time kernel
93s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 10:14

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General

Target

2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe
Size

71KB
MD5

bb39e9a2a04d336d456b8476cd3da84c
SHA1

019bb5403f180825773ca2aa4d9f41285eedc428
SHA256

e3c4d0909a30d5d34fc2ae49d3871b9f81ea43ecfdc4296c42fdce275e4918d6
SHA512

f380699033e550b8ac7ff29d5480de24380e93bacceeb91f783ae99863bf1e9eb29d866ac556e3f8a0b5561f468d673677b45c7c708fa03289767fa50783d8e2
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTt3t:ZhpAyazIlyazTL

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3996 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
3996	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_bb39e9a2a04d336d456b8476cd3da84c_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_bb39e9a2a04d336d456b8476cd3da84c_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_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2876 2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe
Token: SeDebugPrivilege 3996 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2876	2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe
Token: SeDebugPrivilege	3996	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe

description	pid	process	target process
PID 2876 wrote to memory of 3996	2876	2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe	CTS.exe
PID 2876 wrote to memory of 3996	2876	2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe	CTS.exe
PID 2876 wrote to memory of 3996	2876	2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_bb39e9a2a04d336d456b8476cd3da84c_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2876

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:3996

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
0f0315896c6849ffdcc761bc1f3202fd

SHA1
321da9816877dfd37c245ca51771d9b666a42715

SHA256
961f5b7eb24bc6023855bfc7608b09d6d55ffc3cb3b4675d1ab4c43b5aa61c70

SHA512
6b01281094cc159c8bad4fb2db71be2dd77d4dcac772ba37269a6acdbeb18c59afdb4bedf1d639ee491fde342a116ad752932f57d3ef42175461c3722c0c2b1f

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C:\Users\Admin\AppData\Local\Temp\PFXw3hsEPciHcwd.exe
Filesize
71KB

MD5
2a48e2ef474c6f613d6631d157bc0c90

SHA1
132b1dbc2fc774a059378a13c1dac14f865af755

SHA256
99c070699b74172046e8504865d4ea9dc361e4e0e5a3cbd8ba16fcc3bf13f8ee

SHA512
2afaf5878ed9fe699dc34b8c9b7fc7d5531873a7cd55c6ef934cb72dfa826bfe401f12406dd1ee73ac408f0a7595e84c6d9106af06fb9c5f02aa3eb2c334f1b4

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit