66e026ca3bd96a18d2094bca0ad9f142463e66e5ba7d44a735f123cdd4f86f48

Analysis

max time kernel
132s
max time network
102s
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 17:25

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General

Target

2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe
Size

96KB
MD5

1c7ed751797c1a88428869922ffba9f6
SHA1

e5c23f578f3841e8581ff62e89302f9079cfb310
SHA256

66e026ca3bd96a18d2094bca0ad9f142463e66e5ba7d44a735f123cdd4f86f48
SHA512

7daad61e21b8f6557c6f44f6f3e3a20a5d97a95e3788aacc2ec1204b9700927e6e195e67d212f4764a5d3e8fc22fcc48ca5ec08be41bc7f4e76f5cafd643e59c
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTgbc1iwJr6Mg/PMJS:ZRpAyazIliazTgbvwJOk8

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

fU8Ev5dY65aPfd1.exeCTS.exe

pid process

2152 fU8Ev5dY65aPfd1.exe
4292 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
2152	fU8Ev5dY65aPfd1.exe
4292	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_1c7ed751797c1a88428869922ffba9f6_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_1c7ed751797c1a88428869922ffba9f6_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_1c7ed751797c1a88428869922ffba9f6_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4268 2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe
Token: SeDebugPrivilege 4292 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4268	2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe
Token: SeDebugPrivilege	4292	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe

description	pid	process	target process
PID 4268 wrote to memory of 2152	4268	2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe	fU8Ev5dY65aPfd1.exe
PID 4268 wrote to memory of 2152	4268	2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe	fU8Ev5dY65aPfd1.exe
PID 4268 wrote to memory of 4292	4268	2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe	CTS.exe
PID 4268 wrote to memory of 4292	4268	2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe	CTS.exe
PID 4268 wrote to memory of 4292	4268	2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_1c7ed751797c1a88428869922ffba9f6_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4268

C:\Users\Admin\AppData\Local\Temp\fU8Ev5dY65aPfd1.exe
C:\Users\Admin\AppData\Local\Temp\fU8Ev5dY65aPfd1.exe
2⤵
- Executes dropped EXE
PID:2152

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:4292

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
395KB

MD5
69e7545faed14732109806b43a485c87

SHA1
91c72c587b4504b964f9b2f118b3026a51e38ea7

SHA256
9fd2953b0ab620c3c1b79a4e82b38447d92e58c8f0ea9d52522a2b2b275a9485

SHA512
2cd41554e6e2392da08d7cd25ff66689cd927f4206d71c25e9544ca8bd540fdcdcd4c925d8f2e4d66fcfa5e0c5ffe08aafc63ed743b4151701574ef7b40214f7

Download Submit
C:\Users\Admin\AppData\Local\Temp\fU8Ev5dY65aPfd1.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/2152-12-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download