6d67386187f9f6dea82f3d8ac413a5adb2d9436c4eff3e3548f87f561e7b3cc7

Analysis

max time kernel
29s
max time network
33s
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 03:52

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General

Target

2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe
Size

96KB
MD5

d4bb138bdaa20484662f0f011b7af9c9
SHA1

438519418e0b8f83673261ea633bb3d4d52c78df
SHA256

6d67386187f9f6dea82f3d8ac413a5adb2d9436c4eff3e3548f87f561e7b3cc7
SHA512

0e966c813e90c565923d215a888c8f34887f0411ec4d83106c972cae895ec528a3f63e162c679a1bd1b21cf5e73ee33a968a9c5fa33654e09a67a00f3e042fef
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTjDgxly/Z8G8C4PgQ3FnL:ZRpAyazIliazTjDgxlyIVP13dL

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

PMK4FJnEZcbMAjG.exeCTS.exe

pid process

2208 PMK4FJnEZcbMAjG.exe
3872 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
2208	PMK4FJnEZcbMAjG.exe
3872	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.exe2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_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"	2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3608 2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe
Token: SeDebugPrivilege 3872 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3608	2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe
Token: SeDebugPrivilege	3872	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe

description	pid	process	target process
PID 3608 wrote to memory of 2208	3608	2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe	PMK4FJnEZcbMAjG.exe
PID 3608 wrote to memory of 2208	3608	2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe	PMK4FJnEZcbMAjG.exe
PID 3608 wrote to memory of 3872	3608	2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe	CTS.exe
PID 3608 wrote to memory of 3872	3608	2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe	CTS.exe
PID 3608 wrote to memory of 3872	3608	2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_d4bb138bdaa20484662f0f011b7af9c9_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3608

C:\Users\Admin\AppData\Local\Temp\PMK4FJnEZcbMAjG.exe
C:\Users\Admin\AppData\Local\Temp\PMK4FJnEZcbMAjG.exe
2⤵
- Executes dropped EXE
PID:2208

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:3872

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

Replay Monitor

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Downloads

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

MD5
f66c85d334e654da878e34d93cd43a57

SHA1
895a8f39ae154bf34f5e87fa27c5e2a3490d251d

SHA256
5810687bcc0d0addc9769f930c4ee2a6b60eb9d63bc0439793d2599bd530de63

SHA512
665ecd061b7694a1f737a33a85ad16cd26813f3c855611c4f94171e5c3e88dabdabf0825ec7e3300bef7ac5e9fe20af1fca7482aa16b5204f192b23eb3ba1405

Download Submit
C:\Users\Admin\AppData\Local\Temp\PMK4FJnEZcbMAjG.exe
Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
memory/2208-9-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download