stealc | 4081885454a7f63784d5e6dfe56827bc1f6c994d2e146556ff77cc61d86c53c6

General

Target

f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe
Size

296KB
MD5

945a7cd9f48b9258a0d6a66f3e53e995
SHA1

731e7a27e0eb01010c7c6e98d1cdbc572bbd59e4
SHA256

f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972
SHA512

9e341dc9f54bb23ab32888c33153eae79d4e04f55a220bce517afdd237ed487d744d39137cb39ffdba0e1829a4772bccfb152cb76c8847956363ec7f080c8707
SSDEEP

3072:O3xF1vhTaXLw1jIgGPSv9IjrGuV+P46YgWRgZO65AKk0hEl:olhTa7ajTGPRrGuEP46Y35mKl

Score

10^/10

stealc default credential_access discovery spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

default

C2

http://62.204.41.151

Attributes

url_path
/edd20096ecef326d.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
2012	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
3068	f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe
3068	f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.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
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

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

System Location Discovery: System Language Discovery 1 TTPs 3 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

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	f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2880	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3068	f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe
3068	f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 2012	3068	f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe	31
PID 3068 wrote to memory of 2012	3068	f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe	31
PID 3068 wrote to memory of 2012	3068	f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe	31
PID 3068 wrote to memory of 2012	3068	f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe	31
PID 2012 wrote to memory of 2880	2012	cmd.exe	33
PID 2012 wrote to memory of 2880	2012	cmd.exe	33
PID 2012 wrote to memory of 2880	2012	cmd.exe	33
PID 2012 wrote to memory of 2880	2012	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe
"C:\Users\Admin\AppData\Local\Temp\f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\f6b9b4d109149a7788c23795978cb0a581e2c3c82c67b6df87e5939f148f9972.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2012
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2880

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

4

T1552

Credentials In Files

4

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\UnpublishBlock.xlsx

Filesize
10KB

MD5
dc35c9700e2c45d5728f4c64d9b2fd61

SHA1
7e244e7f13c6cd0d34b4a3e68c7561e15e76da6c

SHA256
41725105cc04b02c7cad83084d418371b46b55d58a0dddac6160b6e7c10f91e6

SHA512
e860dcc01e45b2a90166eea475ec8b8b24221b40ff1adfa9c414b11ea37e3bb5f152b082672712e61a652a6e661e3daf328fa21ee5e6a2550fdb5ea69ad337e7

Download Submit
C:\ProgramData\WaitSet.docx

Filesize
20KB

MD5
6aa99718efd805f35a2e54e9c365e784

SHA1
8043159557855c800973c6391c128683ee5969ef

SHA256
9fff0f9977283446fc5fb7237e08a12f6f97d407ed41220cb425fc2d05ebd73b

SHA512
45c58db71ad1f28e3b86afe342c04124b798976d97cef41cfca5d77ec60cdd8c2f392922023574b30941488ca8c535751a448ed2930bd90ef4f892bc56e881c0

Download Submit
\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
memory/3068-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/3068-45-0x0000000000720000-0x0000000000820000-memory.dmp

Filesize
1024KB

Download
memory/3068-1-0x0000000000720000-0x0000000000820000-memory.dmp

Filesize
1024KB

Download
memory/3068-76-0x0000000000220000-0x0000000000250000-memory.dmp

Filesize
192KB

Download
memory/3068-77-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/3068-3-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/3068-2-0x0000000000220000-0x0000000000250000-memory.dmp

Filesize
192KB

Download
memory/3068-95-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/3068-96-0x0000000000720000-0x0000000000820000-memory.dmp

Filesize
1024KB

Download

Analysis

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