51b3773145652b5d559396a08e1282a3a1d92d4df473f774d61791386fca0598

Analysis

max time kernel
361s
max time network
362s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-11-2024 03:09

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General

Target

bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe
Size

791KB
MD5

d1e75b274211a78d9c5d38c8ff2e1778
SHA1

d14954a7b9e0c778909fe8dcad99ad4120365b2e
SHA256

bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f
SHA512

1ec3fbb0bf17d4ad6397ba2e58daa210745f10f88f6722971464a6eeb7573f49be6d65e70a497002d6d00745317f11442bdeaf999b91127b123c11dfe9b088c2
SSDEEP

24576:l2RNuxIAdOx6mNoGSyGMjc6XaMAy9xg5tMZ/Z3RPpEYrTQAU:rIG+lbGuntxktM15RPpEYrTQAU

Score

7^/10

discovery persistence spyware stealer

Malware Config

Signatures

Drops startup file 1 IoCs

Processes:

bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zcrypt.lnk	bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe

Executes dropped EXE 1 IoCs

Processes:

zcrypt.exe

pid process

2340 zcrypt.exe
Loads dropped DLL 1 IoCs

Processes:

bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe

pid process

2684 bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe
Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

pid	process
2340	zcrypt.exe

pid	process
2684	bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\zcrypt = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe\" "	bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe

description	pid	process	target process
PID 2684 wrote to memory of 2340	2684	bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe	zcrypt.exe
PID 2684 wrote to memory of 2340	2684	bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe	zcrypt.exe
PID 2684 wrote to memory of 2340	2684	bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe	zcrypt.exe
PID 2684 wrote to memory of 2340	2684	bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe	zcrypt.exe

C:\Users\Admin\AppData\Local\Temp\bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe
"C:\Users\Admin\AppData\Local\Temp\bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2684
- C:\Users\Admin\AppData\Roaming\zcrypt.exe
  C:\Users\Admin\AppData\Roaming\zcrypt.exe
  2⤵
  - Executes dropped EXE
  PID:2340

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\zcrypt.exe

Filesize
791KB

MD5
d1e75b274211a78d9c5d38c8ff2e1778

SHA1
d14954a7b9e0c778909fe8dcad99ad4120365b2e

SHA256
bc557a7bfec430aab3a1b326f35c8d6c1d2de0532263df872b2280af65f32b8f

SHA512
1ec3fbb0bf17d4ad6397ba2e58daa210745f10f88f6722971464a6eeb7573f49be6d65e70a497002d6d00745317f11442bdeaf999b91127b123c11dfe9b088c2

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