52ae68635b5bec801a0a6c69f834cdd44ba23d14e1272ba83865c4ce2543700f

Analysis

max time kernel
67s
max time network
54s
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 01:29

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General

Target

2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe
Size

73KB
MD5

562d8e8a1ccaa173214c2684f19811f0
SHA1

8eaaedf16c5d73c9366c883be1eb63d6709eac75
SHA256

52ae68635b5bec801a0a6c69f834cdd44ba23d14e1272ba83865c4ce2543700f
SHA512

805594493735d58509db32e19a4c2810581bd43220066578e125c1cf679f208b11590f2fce15438808907e6bf0fa89c0b2510e0f923e4dd9cdfec013bce24a96
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTmWY0J:ZRpAyazIliazTe0J

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1512 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
1512	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_562d8e8a1ccaa173214c2684f19811f0_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_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

CTS.exe2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe

description ioc process

File created C:\Windows\CTS.exe CTS.exe
File created C:\Windows\CTS.exe 2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2272 2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe
Token: SeDebugPrivilege 1512 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe

description	pid	process
Token: SeDebugPrivilege	2272	2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe
Token: SeDebugPrivilege	1512	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe

description	pid	process	target process
PID 2272 wrote to memory of 1512	2272	2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe	CTS.exe
PID 2272 wrote to memory of 1512	2272	2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe	CTS.exe
PID 2272 wrote to memory of 1512	2272	2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_562d8e8a1ccaa173214c2684f19811f0_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2272

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:1512

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
392KB

MD5
fc979b4dcda16df31442a8c518922c0a

SHA1
fef79322fd31d9295b492abc3db71a7013c6762d

SHA256
d7aa460965ea8a3df630eecfe7454bb18677c365c54e3d01d4d03724940e2589

SHA512
a5bc0c1f12b5601692cf790b096043997749eeb9a40287bba9fb4a9f0eb02a9d6e41358935c81eb85289882b587e2e425e38dc74f9efc55114ad3ed1e58046d6

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C:\Users\Admin\AppData\Local\Temp\NOwn0cT2kWpvyMn.exe
Filesize
73KB

MD5
9ac393d79e6d4e41d8026bd594a3dd96

SHA1
e4a5b87729d571bd6b620759abfd9f6d4d4e0989

SHA256
cb622825617f3b5e964f41d24347e62245b2d4838b3efc637c1c9d5e044881d1

SHA512
b5a2c7ba57ce217d7155e806c02d8168665d1a54486785864c6a04976f3889e8ffaf801fa9ed76381e950d1941e0f4de0204ff9a3caf8cd73d138560dcd84bb0

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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