9665ffbe036b6b4d6cf6e02b38b50cb5efd4af90d56eed0c13b0ebd325f8c94f

Analysis

max time kernel
131s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
27-05-2024 06:36

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General

Target

2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
Size

71KB
MD5

aca7b8ee0d6846564ad083cd3758902a
SHA1

18ad718453dc5c34e0002470084511b839a46f54
SHA256

9665ffbe036b6b4d6cf6e02b38b50cb5efd4af90d56eed0c13b0ebd325f8c94f
SHA512

26bae61277fd814ea17c907b49153d579856c1844593824f6303c153209c8c1ac72e75640c3a46c31d39459fb195ce872db77a3c7ab893eb0ed761bc8ce3a1d5
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTe:ZRpAyazIliazTe

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2400 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
2400	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_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:

2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3204 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
Token: SeDebugPrivilege 2400 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3204	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
Token: SeDebugPrivilege	2400	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe

description	pid	process	target process
PID 3204 wrote to memory of 2400	3204	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe	CTS.exe
PID 3204 wrote to memory of 2400	3204	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe	CTS.exe
PID 3204 wrote to memory of 2400	3204	2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3204

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:2400

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
392KB

MD5
f5ccf83df63d51ed13c86ce1f641e290

SHA1
28cbbcaaaa0deac078b5d8fb72b9e00de41508b9

SHA256
8409548c220a9394f7416a7688ff7e996ef1dc8642b915459feee351ec7351d8

SHA512
ebe9dc3e202bd56e689e24ae81d7208d9c89752c56701fdf58ea487b75f7f5d1c3796a5e5f39e16ac3b23479c0229d937dfc69a03da4813f94179956b3065b22

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C:\Users\Admin\AppData\Local\Temp\zh55gDmDEvBBKU4.exe

Filesize
71KB

MD5
d9941a0ed9c1387b0277b45e3b782b40

SHA1
11cfca64e76ed375fd90de87b4b47916a7f79dd3

SHA256
69def515d2e78339d9080ad580dd056c7cdec5d47878429fd23243671f6940db

SHA512
0052317d4e746dab40559e2669e1dfe7b5aba456c5f02d056ec53547bd1fdd1bfbfcdb71dd1b2223ddb8d57a0e0ac7ff7db9731879f868b8d0a05c66b5999ef1

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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