stealc | 8129223972fb532baa3fd67b5a20d3c4d12f3fe42d8a7547e38f75e3a52df37e

General

Target

64484fbd938448a71202c90d151fc8e4.exe
Size

817KB
MD5

64484fbd938448a71202c90d151fc8e4
SHA1

e52bd39a933ab6762292e38caa2001c1dfeea5b9
SHA256

8129223972fb532baa3fd67b5a20d3c4d12f3fe42d8a7547e38f75e3a52df37e
SHA512

5f53808393f00cedc552462c53045cfb8e8fe6bc7a32eced72fce255b454fde24fe350841e800b46424747af16fdf615d709532d11fd67a926ee15a5dadae676
SSDEEP

24576:FgLNqLM6+dQtWfgi4HShiO8nYq0MYduMTxG:PM6+dQtWfbCO8nYHMY1

Score

10^/10

stealc leg discovery spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

Leg

C2

http://40.86.87.10

Attributes

url_path
/108e010e8f91c38c.php

Signatures

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

Loads dropped DLL 2 IoCs

pid	Process
1036	RegAsm.exe
1036	RegAsm.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2940 set thread context of 1036	2940	64484fbd938448a71202c90d151fc8e4.exe	86

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1036	RegAsm.exe
1036	RegAsm.exe
1036	RegAsm.exe
1036	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2940 wrote to memory of 1056	2940	64484fbd938448a71202c90d151fc8e4.exe	84
PID 2940 wrote to memory of 1056	2940	64484fbd938448a71202c90d151fc8e4.exe	84
PID 2940 wrote to memory of 1056	2940	64484fbd938448a71202c90d151fc8e4.exe	84
PID 2940 wrote to memory of 3384	2940	64484fbd938448a71202c90d151fc8e4.exe	85
PID 2940 wrote to memory of 3384	2940	64484fbd938448a71202c90d151fc8e4.exe	85
PID 2940 wrote to memory of 3384	2940	64484fbd938448a71202c90d151fc8e4.exe	85
PID 2940 wrote to memory of 1036	2940	64484fbd938448a71202c90d151fc8e4.exe	86
PID 2940 wrote to memory of 1036	2940	64484fbd938448a71202c90d151fc8e4.exe	86
PID 2940 wrote to memory of 1036	2940	64484fbd938448a71202c90d151fc8e4.exe	86
PID 2940 wrote to memory of 1036	2940	64484fbd938448a71202c90d151fc8e4.exe	86
PID 2940 wrote to memory of 1036	2940	64484fbd938448a71202c90d151fc8e4.exe	86
PID 2940 wrote to memory of 1036	2940	64484fbd938448a71202c90d151fc8e4.exe	86
PID 2940 wrote to memory of 1036	2940	64484fbd938448a71202c90d151fc8e4.exe	86
PID 2940 wrote to memory of 1036	2940	64484fbd938448a71202c90d151fc8e4.exe	86
PID 2940 wrote to memory of 1036	2940	64484fbd938448a71202c90d151fc8e4.exe	86

C:\Users\Admin\AppData\Local\Temp\64484fbd938448a71202c90d151fc8e4.exe
"C:\Users\Admin\AppData\Local\Temp\64484fbd938448a71202c90d151fc8e4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2940
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:1056
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:3384
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1036

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
C:\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
memory/1036-1-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download
memory/1036-3-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download
memory/1036-4-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download
memory/1036-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1036-77-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download
memory/2940-0-0x0000000003150000-0x0000000003151000-memory.dmp

Filesize
4KB

Download

Analysis

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