stealc | 6534b09aaf207abaa69df8a5065e0f098f24d547542e6581e52b04d33d276c82

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
09/01/2024, 13:10

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General

Target
file.exe
Size 311KB
Sample240109-qectzacfc2
SHA256 6534b09aaf207abaa69df8a5065e0f098f24d547542e6581e52b04d33d276c82
MD5 7b2b8a3cba68aa1586640d39eb0fdab3
SHA1 0862797ca1fa67141cc19378f6fce653bb689d39
SHA512 ca2c3d8a6208b315e35449f3cf6a87a0747394c4905e715e8bac7db5ce18641f7744d27f0694c5f6aea1e63e1c0aecba1f7d5e26ad351ece8d36a8c769ff238f
SSDEEP 6144:mSZ/LS0aXFu89H//oqKjLPxx/Qv0TpIhFk:BZ/+06VoNLPxC8uF
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

http://5.42.64.41

Attributes

url_path
/40d570f44e84a454.php

rc4.plain

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
1828	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
2076	file.exe
2076	file.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	file.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	file.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1628	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2076	file.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 1828	2076	file.exe	33
PID 2076 wrote to memory of 1828	2076	file.exe	33
PID 2076 wrote to memory of 1828	2076	file.exe	33
PID 2076 wrote to memory of 1828	2076	file.exe	33
PID 1828 wrote to memory of 1628	1828	cmd.exe	32
PID 1828 wrote to memory of 1628	1828	cmd.exe	32
PID 1828 wrote to memory of 1628	1828	cmd.exe	32
PID 1828 wrote to memory of 1628	1828	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2076
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\file.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1828

C:\Windows\SysWOW64\timeout.exe
timeout /t 5
1⤵
- Delays execution with timeout.exe
PID:1628

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

mozglue.dll

Path \ProgramData\mozglue.dll
Size 93KB
SHA256 5852792f1336aa733f1d408b62b49fd8441e42b233c11d9e4598cb16162c703e
MD5 4dbc7954b454fe1da47903b78fbf869b
SHA1 86060e84fee0f0102c33c33585dfb717bd25709b
SHA512 263d8cd065a29756f48790d5a85407712f82c4dc6b4853a2476827a2deeb539a664723744316ea20b3dc1559d175277ef3dff2ebf2c3fd74a980c5a4a19f19e4
SSDEEP 1536:LuB48tCHiONDnVjq5Ux4yAoxdruPgaQ/Y9BZE2G7gttRB:LuWBi+DnlSyAob6PgaQ/YGc9B
MD5 SHA1 SHA512 SSDEEP

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nss3.dll

Path \ProgramData\nss3.dll
Size 72KB
SHA256 5a5b63133f41535fec1104cc4652f154895c3adcbdceba7cd281cde54b88b1bc
MD5 9bcce22104397b77e349fa44526c6c0f
SHA1 ffd1980751a4d16a22ebca458ddcce5a583d166d
SHA512 05fb8b31cc7cb5dea13b0584a0ebc3ac68b9a524c0702cfe0982d42f1604b0acc71dc960297014ee4531385e97683ef401fe9e4930017065930a9ebe79322e55
SSDEEP 1536:SRzsFXhMyGK2FijgQOGPJBFx/ae9L2yYlbRiIYW1HA8F+HmziLb:SOFXiyGKomgtwJBFx/1L2XlbR1YyA8Fe
MD5 SHA1 SHA512 SSDEEP

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memory/2076-2-0x0000000000220000-0x000000000023C000-memory.dmp

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memory/2076-3-0x0000000000400000-0x000000000086F000-memory.dmp

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memory/2076-1-0x0000000000A10000-0x0000000000B10000-memory.dmp

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memory/2076-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/2076-42-0x0000000000400000-0x000000000086F000-memory.dmp

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memory/2076-68-0x0000000000400000-0x000000000086F000-memory.dmp

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memory/2076-69-0x0000000000A10000-0x0000000000B10000-memory.dmp

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memory/2076-73-0x0000000000400000-0x000000000086F000-memory.dmp

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memory/2076-76-0x0000000000400000-0x000000000086F000-memory.dmp

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memory/2076-77-0x0000000000A10000-0x0000000000B10000-memory.dmp

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