25f8a420e5e1c4cbdb6b181b631beac5341f2d9efd51bcd1e78cc709f857bdd0

Analysis

max time kernel
129s
max time network
99s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 15:27

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General

Target

2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe
Size

96KB
MD5

833bb40c2adc4c8e667bd4cb817fd567
SHA1

d5fa33c274fa8c2c543fad21b238dd99c263eb3a
SHA256

25f8a420e5e1c4cbdb6b181b631beac5341f2d9efd51bcd1e78cc709f857bdd0
SHA512

1c1f681e36f4d615c7e7e3b50dba7c58575f9f9c1d2da0c7449ce6f9bb41730c151912d9c770457da942bab8f71bed174954f17684026e53b0b7da316ecaf298
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTTOvlLSAlB:ZRpAyazIliazTT+SAn

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

egiChIkYzrqWiqb.exeCTS.exe

pid process

2108 egiChIkYzrqWiqb.exe
1172 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
2108	egiChIkYzrqWiqb.exe
1172	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_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:

2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4400 2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe
Token: SeDebugPrivilege 1172 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4400	2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe
Token: SeDebugPrivilege	1172	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe

description	pid	process	target process
PID 4400 wrote to memory of 2108	4400	2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe	egiChIkYzrqWiqb.exe
PID 4400 wrote to memory of 2108	4400	2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe	egiChIkYzrqWiqb.exe
PID 4400 wrote to memory of 1172	4400	2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe	CTS.exe
PID 4400 wrote to memory of 1172	4400	2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe	CTS.exe
PID 4400 wrote to memory of 1172	4400	2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_833bb40c2adc4c8e667bd4cb817fd567_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4400

C:\Users\Admin\AppData\Local\Temp\egiChIkYzrqWiqb.exe
C:\Users\Admin\AppData\Local\Temp\egiChIkYzrqWiqb.exe
2⤵
- Executes dropped EXE
PID:2108

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:1172

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
2186faef62a8a7d1fb280423be621550

SHA1
28190be3ec7b7da7456da55d6811544f3f87db3a

SHA256
3ec59cd44d8ed2e938b68ad77ec67d0112833b6ab70dae33f050155d864a2912

SHA512
96a48b0c31c75bc9e50b2d60d5b0c146767717ba6711353bac8852f846bb215b11cce31703f7e4fdf2c6dfc959c3bd7e3ba6e91219aeb0ee45964c95331c0a81

Download Submit
C:\Users\Admin\AppData\Local\Temp\egiChIkYzrqWiqb.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/2108-10-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

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