f8b20c87d61ff21fe2b18b18e8762a502771dbe2438607754bec98ab7e26cf65

Analysis

max time kernel
92s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
05/07/2024, 23:37

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General

Target

2024-07-05_cfa38e1cdcda6caf3984b4f7874dee13_bkransomware.exe
Size

71KB
MD5

cfa38e1cdcda6caf3984b4f7874dee13
SHA1

1ddc102437981147814ea6e7f2db343251d1dc47
SHA256

f8b20c87d61ff21fe2b18b18e8762a502771dbe2438607754bec98ab7e26cf65
SHA512

e7d25eccadd4e4ed519478431b72f110451357a63f82aa11290bb02d3b02a67799b69f1db0359c5397a6b2a2a3d471dddd174b3e3f32749c03b79b5e4d8411db
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTG:ZRpAyazIliazTG

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4444	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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-07-05_cfa38e1cdcda6caf3984b4f7874dee13_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

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-07-05_cfa38e1cdcda6caf3984b4f7874dee13_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4880	2024-07-05_cfa38e1cdcda6caf3984b4f7874dee13_bkransomware.exe
Token: SeDebugPrivilege	4444	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4880 wrote to memory of 4444	4880	2024-07-05_cfa38e1cdcda6caf3984b4f7874dee13_bkransomware.exe	82
PID 4880 wrote to memory of 4444	4880	2024-07-05_cfa38e1cdcda6caf3984b4f7874dee13_bkransomware.exe	82
PID 4880 wrote to memory of 4444	4880	2024-07-05_cfa38e1cdcda6caf3984b4f7874dee13_bkransomware.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-07-05_cfa38e1cdcda6caf3984b4f7874dee13_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-07-05_cfa38e1cdcda6caf3984b4f7874dee13_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4880
- 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:4444

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

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Downloads

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

Filesize
392KB

MD5
c68213530051d4d247a9f77c269c1146

SHA1
6d3ff0ba5cb0834af92acfc3355e1a1f9234b869

SHA256
1fe51afd2eee453c5f1fcc131bc067e4d05d4536fb144b99dacfd44d91e656fa

SHA512
4a6fc542fba33815b7f8b39602b991aedead24aa57cd3d6d2edea3805a53ca993010efd029274ddab7d6fab724d9f108a96ff455218eaaee766fdadeb3c76729

Download Submit
C:\Users\Admin\AppData\Local\Temp\yaufysAVTT423Je.exe

Filesize
71KB

MD5
644bb00f9c4c6a87cf1daa7d4392203c

SHA1
e689c22876cf939e9292d26c9fbcefb8bad4b873

SHA256
1efee0acb8f761cac1aae64aa990a315ddf8d5ac50e08505f20a53cc443d8130

SHA512
92fbd62071a5acdaa27ddf012e77492d841504bee3a477449fe428b0cad5d7ce2cf11015e30cedc4b45ce29a3ef72110aeff9eb35f7e4753ef737b23193dbb77

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads