2d657487cf4e4ecb67f7bb9ee1969a8f08c4e40a3e431b877acd800e889d1b56

Analysis

max time kernel
55s
max time network
49s
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 17:29

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General

Target

2024-04-28_ae3b195fdb7be05c827219d633a1244c_bkransomware.exe
Size

71KB
MD5

ae3b195fdb7be05c827219d633a1244c
SHA1

e88d4a685333292e0827ea6b8050bc13b7b650e9
SHA256

2d657487cf4e4ecb67f7bb9ee1969a8f08c4e40a3e431b877acd800e889d1b56
SHA512

07e13871f8b04103879dbc18907f128715b0eeb68d91208eb570ec3937383184431f59238053e581136727da5284c5d742bacc6675901cad5a35bd83d6610214
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTD:ZhpAyazIlyazTD

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4324 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
4324	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_ae3b195fdb7be05c827219d633a1244c_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_ae3b195fdb7be05c827219d633a1244c_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_ae3b195fdb7be05c827219d633a1244c_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_ae3b195fdb7be05c827219d633a1244c_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_ae3b195fdb7be05c827219d633a1244c_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3572 2024-04-28_ae3b195fdb7be05c827219d633a1244c_bkransomware.exe
Token: SeDebugPrivilege 4324 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_ae3b195fdb7be05c827219d633a1244c_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3572	2024-04-28_ae3b195fdb7be05c827219d633a1244c_bkransomware.exe
Token: SeDebugPrivilege	4324	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_ae3b195fdb7be05c827219d633a1244c_bkransomware.exe

description	pid	process	target process
PID 3572 wrote to memory of 4324	3572	2024-04-28_ae3b195fdb7be05c827219d633a1244c_bkransomware.exe	CTS.exe
PID 3572 wrote to memory of 4324	3572	2024-04-28_ae3b195fdb7be05c827219d633a1244c_bkransomware.exe	CTS.exe
PID 3572 wrote to memory of 4324	3572	2024-04-28_ae3b195fdb7be05c827219d633a1244c_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_ae3b195fdb7be05c827219d633a1244c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_ae3b195fdb7be05c827219d633a1244c_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3572

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:4324

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
799c58d1b8ffbec0adb45e987c809ea2

SHA1
379f76244fdc59ee2963df5d48c372a195d1d9d2

SHA256
6a59c9535d50fc3f77b74f8ca75ad5c5ce57cdc10379a2805fc0c2e5c3e5cd74

SHA512
590578bae0039532bd1458b6c85872a436cd142b1e2f887e80baf86698b0bc8082c4f6f1e1f99b0cdf21365dfe6fb61e2434d644838b3fba5d91c1a781d11adc

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C:\Users\Admin\AppData\Local\Temp\Rw7vFKfcBHbxiUY.exe
Filesize
71KB

MD5
26ec309623b7471d0c92305141eae78b

SHA1
bc8c1309bb1abf331a1316ddcb7e7dc46a4653cc

SHA256
a6d3f0ec015ea8743ad2538a9dc9011c318018e60cc230c6409515bc815bcb9d

SHA512
f8021d09f0dc91daa17689a5eb8ae37dd016eb405d1773701afcb369124b450f762e70bec533902ff34e8f6f77e6ba7352b7c8cdb2b72b5ad66c24d72c85524d

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit