834f6a3d60fc1e64fcb15957d9778deacafa56673c39955722f908f3865421bb

Analysis

max time kernel
94s
max time network
105s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 22:29

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General

Target

2024-06-02_f04b255ec9d9c96ccb2d03a8e679cbb8_bkransomware.exe
Size

96KB
MD5

f04b255ec9d9c96ccb2d03a8e679cbb8
SHA1

e816186a3e48bbdc3f0420f440498a8c7e50cbd7
SHA256

834f6a3d60fc1e64fcb15957d9778deacafa56673c39955722f908f3865421bb
SHA512

055dceb7663158493e43071614cba09da5fb57492d8decadff2fa8036eed253e1828b50ce9a7d96eeda975b82ca777caf9bdf4e8446ad975b832f8dc0426adb6
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTD4qB0JGdo4zqq75Qj:ZRpAyazIliazTEzGdopq75Qj

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1688	JZN6eOm7lgHrXvT.exe
4068	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"	2024-06-02_f04b255ec9d9c96ccb2d03a8e679cbb8_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	2024-06-02_f04b255ec9d9c96ccb2d03a8e679cbb8_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4396	2024-06-02_f04b255ec9d9c96ccb2d03a8e679cbb8_bkransomware.exe
Token: SeDebugPrivilege	4068	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4396 wrote to memory of 1688	4396	2024-06-02_f04b255ec9d9c96ccb2d03a8e679cbb8_bkransomware.exe	82
PID 4396 wrote to memory of 1688	4396	2024-06-02_f04b255ec9d9c96ccb2d03a8e679cbb8_bkransomware.exe	82
PID 4396 wrote to memory of 4068	4396	2024-06-02_f04b255ec9d9c96ccb2d03a8e679cbb8_bkransomware.exe	84
PID 4396 wrote to memory of 4068	4396	2024-06-02_f04b255ec9d9c96ccb2d03a8e679cbb8_bkransomware.exe	84
PID 4396 wrote to memory of 4068	4396	2024-06-02_f04b255ec9d9c96ccb2d03a8e679cbb8_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-06-02_f04b255ec9d9c96ccb2d03a8e679cbb8_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_f04b255ec9d9c96ccb2d03a8e679cbb8_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4396
- C:\Users\Admin\AppData\Local\Temp\JZN6eOm7lgHrXvT.exe
  C:\Users\Admin\AppData\Local\Temp\JZN6eOm7lgHrXvT.exe
  2⤵
  - Executes dropped EXE
  PID:1688
- 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:4068

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
8652ee4814721819775a35cf403dcfd4

SHA1
47d9a4b93f37b6559422c261f05dd81a20ee6273

SHA256
7c8abead37b13e88a37d1f34d8c0b7f8a335786c3206380ce7284f74096cb787

SHA512
b1bdbf312f171eb427d5b6176e95d02def7014aab92b59620b5079a4db58006de66cec2dc7b2f9e327dc333dc93202ae0929b469bc83f7f85fedc9c2b1e3a450

Download Submit
C:\Users\Admin\AppData\Local\Temp\JZN6eOm7lgHrXvT.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/1688-11-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads