252d8c1d88c2a702e0b082506f30e603b7fb54bb1081f121aa81e32b49dbd2df

Analysis

max time kernel
93s
max time network
122s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 03:47

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General

Target

2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe
Size

71KB
MD5

a5c6f0537e7a3371b7cf4799e09d710c
SHA1

72f0c2dc4c404774e3fe83c87bbad4fc96283397
SHA256

252d8c1d88c2a702e0b082506f30e603b7fb54bb1081f121aa81e32b49dbd2df
SHA512

70f38764f863c98788e594c81376786011538ea809d2d899876fe12fc07ceb81909f16eca1f31fdddf7db0fba2187184d61c610966c4615b6841dd14320e34f0
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTL:ZRpAyazIliazTL

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1500 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
1500	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

CTS.exe2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4272 2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe
Token: SeDebugPrivilege 1500 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4272	2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe
Token: SeDebugPrivilege	1500	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe

description	pid	process	target process
PID 4272 wrote to memory of 1500	4272	2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe	CTS.exe
PID 4272 wrote to memory of 1500	4272	2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe	CTS.exe
PID 4272 wrote to memory of 1500	4272	2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_a5c6f0537e7a3371b7cf4799e09d710c_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4272

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:1500

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
394KB

MD5
76cf0b9efad0007577ea5a4835f71af5

SHA1
f98c030a912b1c5a5b156193a697c26b3e66db88

SHA256
0a54c170fa82d930e23d34e94000a002f082388f89ee490179d915c18c9dcc3d

SHA512
ef6ce88bc430694e2aafb7209a489ab0c6364c57f9a92d5238b5aa9b2f94138c92a96da363511735e442df9a5a2e0fb8181f93d8f20ac334575f6e3451935b56

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

MD5
8305cb1f41921e0e2dae10da38dca014

SHA1
a09fc53d72050ea36711f222205250fb6807530a

SHA256
d6327ecf57c4b46a06bf73b71858a4f2f207c1b4b4338476bbc37f69b2ea793d

SHA512
6b73e955be7804cc2b160c02f7cf254339493ecc783bcfa3a547a8aff80c458b0799208ead53039692019620d47f5196a984d0d48413994e0da7fde23653a83b

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit