54a4ea1994f12418819fe0fb38c6e63065df677ae34caca945153de5a2b3a594

Analysis

max time kernel
134s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
05/05/2024, 15:35

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General

Target

2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe
Size

71KB
MD5

8ac34719cb003de2defb7e044fc097e0
SHA1

beded5e6f4b094fa778f01e3429645f0d1aa236c
SHA256

54a4ea1994f12418819fe0fb38c6e63065df677ae34caca945153de5a2b3a594
SHA512

63359b6df19b39ea059dc2ddbbb769d12b37cc3240f597f92e703baa6d9f60bf59f3f5d425385ef7efeb5e31cf869ac9f60385cbd5842c36eaec2b3c34d3dd2b
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTE:ZRpAyazIliazTE

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4884	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"	2024-05-05_8ac34719cb003de2defb7e044fc097e0_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	2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2584	2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe
Token: SeDebugPrivilege	4884	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2584 wrote to memory of 4884	2584	2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe	84
PID 2584 wrote to memory of 4884	2584	2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe	84
PID 2584 wrote to memory of 4884	2584	2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2584
- 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:4884

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
394KB

MD5
e4d4bb7480ee9cce446639f1f03359a9

SHA1
203a8fed4b6bdfdf3efcce240e3a2eb41e71fa72

SHA256
cadf916e5fd4fcba40191b858032f2b4bb4562b78add3b846c1d3d20d3401bd5

SHA512
8a15e90daf947e046be6e70deaa86b4b98bfc2327e6c65a6e663f7d7fea650a7f4ec98fb32b8a33380e3c5b3199f51c66c4c9f5e070c68980fe38fdd109f9634

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C:\Users\Admin\AppData\Local\Temp\B1rPJ2FcM9xv5nQ.exe

Filesize
71KB

MD5
47c2d97d1bd4764341a1fc0ca3df5a14

SHA1
300aa772f4c5fc31da508209a13c58a985fd0758

SHA256
65644519c47bf78fa5a4a83345d73898b4483abb80bb7f344f1f30f59027335f

SHA512
3459f97af8381477f07c3eeccd960647ee36f59c4cced2256936aff382409dd7c529fdf7170e00180f5ff8f6366af6f89a15a36239dad360990cfb9352665521

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads