515919e39d74f861a0fc56e3c4bd950f266a8caef7a421bd3410741fb1d8bda3

Analysis

max time kernel
94s
max time network
96s
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 03:48

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General

Target

2024-04-28_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exe
Size

71KB
MD5

a7541b7c8fd4cd4ed49b8a8d5039b6a0
SHA1

448fba6b9a520b8e8f266d61b20442f789b6a7a7
SHA256

515919e39d74f861a0fc56e3c4bd950f266a8caef7a421bd3410741fb1d8bda3
SHA512

8be83a99e568990b082af11df45dc22ba0b2f7255cf7300626b4059e11da3a48024f8ecf77c00e249e282d22ed6623aed429f67b6d5581ade9e4a919ab294967
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTC:ZRpAyazIliazTC

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3360 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
3360	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_a7541b7c8fd4cd4ed49b8a8d5039b6a0_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_a7541b7c8fd4cd4ed49b8a8d5039b6a0_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_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3028 2024-04-28_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exe
Token: SeDebugPrivilege 3360 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3028	2024-04-28_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exe
Token: SeDebugPrivilege	3360	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exe

description	pid	process	target process
PID 3028 wrote to memory of 3360	3028	2024-04-28_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exe	CTS.exe
PID 3028 wrote to memory of 3360	3028	2024-04-28_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exe	CTS.exe
PID 3028 wrote to memory of 3360	3028	2024-04-28_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_a7541b7c8fd4cd4ed49b8a8d5039b6a0_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3028

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:3360

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
84197b31720fcda108a9fe3ee159625a

SHA1
02ff569a61f2ccc643a00ac01cc79eb8de416c02

SHA256
36a73eb51935d84de1c55327f1ed690aac252cf325697974df6e65b25c4a6a27

SHA512
2a4b9d60012177e1a90f9cb3746bd650478731efde99acbb078f7ca76283b22a48b84bf295f2379f46749b6f1ccd875f5d9fc720acff1d374b80b1e865d7535b

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C:\Users\Admin\AppData\Local\Temp\BMidwDWf48w87Tc.exe
Filesize
71KB

MD5
015a903f77a0142a5cf26db8b07fc658

SHA1
492a583858b110308dad3bca4e445ea39d430fdb

SHA256
311ea8e1a7b4283736d4c0320013dd3f2d1b7f4a31d3978caaf40f6ca1c40437

SHA512
a478623bb5f708a3c96fb6bffabeef3d1c88de3d445096c79546637af3b11e68fc2b3f30d6b1a201737d343709557c5284e3bdb7b547db369330dbb45159bc33

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit