stealc | 33ec381cf58df623bc6b3879a5aea2914034d42b885a2c61aaf10f6c2ab8cae4

Analysis

max time kernel
96s
max time network
97s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
07/10/2024, 01:02

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General

Target
ab315f59c8c2658c5d87e8125adc2678.exe
Size 502KB
Sample241007-bdsfpszfkf
SHA256 33ec381cf58df623bc6b3879a5aea2914034d42b885a2c61aaf10f6c2ab8cae4
MD5 ab315f59c8c2658c5d87e8125adc2678
SHA1 3b641bdfe96df3a1039567bba3d8390e9308935b
SHA512 fccc05f521c9fe0a69392f5a75a9bada815754ca794aec12f48a0ee13d3d68e37888d94e96ebf7e94dd8fc940a8d2085759fa78059aae68f8b8cd6bbe2caf3b0
SSDEEP 12288:+KSTR6VfHFgPoVgZdx6UjjG64xqNS+3xnkgxvts7SrKY:+K06V/QjjGv+iu67Yh
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc default credential_access discovery spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

default

http://46.8.231.109

Attributes

url_path
/c4754d4f680ead72.php

Signatures

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
4584	MSBuild.exe
4584	MSBuild.exe

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4752 set thread context of 4584	4752	ab315f59c8c2658c5d87e8125adc2678.exe	83

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	ab315f59c8c2658c5d87e8125adc2678.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	MSBuild.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4584	MSBuild.exe
4584	MSBuild.exe
4584	MSBuild.exe
4584	MSBuild.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2084	cmd.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4752 wrote to memory of 920	4752	ab315f59c8c2658c5d87e8125adc2678.exe	82
PID 4752 wrote to memory of 920	4752	ab315f59c8c2658c5d87e8125adc2678.exe	82
PID 4752 wrote to memory of 920	4752	ab315f59c8c2658c5d87e8125adc2678.exe	82
PID 4752 wrote to memory of 4584	4752	ab315f59c8c2658c5d87e8125adc2678.exe	83
PID 4752 wrote to memory of 4584	4752	ab315f59c8c2658c5d87e8125adc2678.exe	83
PID 4752 wrote to memory of 4584	4752	ab315f59c8c2658c5d87e8125adc2678.exe	83
PID 4752 wrote to memory of 4584	4752	ab315f59c8c2658c5d87e8125adc2678.exe	83
PID 4752 wrote to memory of 4584	4752	ab315f59c8c2658c5d87e8125adc2678.exe	83
PID 4752 wrote to memory of 4584	4752	ab315f59c8c2658c5d87e8125adc2678.exe	83
PID 4752 wrote to memory of 4584	4752	ab315f59c8c2658c5d87e8125adc2678.exe	83
PID 4752 wrote to memory of 4584	4752	ab315f59c8c2658c5d87e8125adc2678.exe	83
PID 4752 wrote to memory of 4584	4752	ab315f59c8c2658c5d87e8125adc2678.exe	83
PID 4584 wrote to memory of 2084	4584	MSBuild.exe	85
PID 4584 wrote to memory of 2084	4584	MSBuild.exe	85
PID 4584 wrote to memory of 2084	4584	MSBuild.exe	85

C:\Users\Admin\AppData\Local\Temp\ab315f59c8c2658c5d87e8125adc2678.exe
"C:\Users\Admin\AppData\Local\Temp\ab315f59c8c2658c5d87e8125adc2678.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4752
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  PID:920
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4584
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\AdminGDAAKFIDGI.exe"
    3⤵
    - Checks computer location settings
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2084

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

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

mozglue.dll

Path C:\ProgramData\mozglue.dll
Size 593KB
SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
MD5 c8fd9be83bc728cc04beffafc2907fe9
SHA1 95ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA512 fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
SSDEEP 12288:BlSyAom/gcRKMdRm4wFkRHuyG4RRGJVDjMk/x21R8gY/r:BKgcRKMdRm4wFkVVDGJVv//x21R8br
MD5 SHA1 SHA512 SSDEEP

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nss3.dll

Path C:\ProgramData\nss3.dll
Size 2.0MB
SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
MD5 1cc453cdf74f31e4d913ff9c10acdde2
SHA1 6e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA512 dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
SSDEEP 49152:fECf12gikHlnKGxJRIB+y5nvxnaOSJ3HFNWYrVvE4CQsgzMmQfTU1NrWmy4KoAzh:J7Tf8J1Q+SS5/nr
MD5 SHA1 SHA512 SSDEEP

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memory/4584-3-0x0000000000400000-0x0000000000661000-memory.dmp

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memory/4584-4-0x0000000000400000-0x0000000000661000-memory.dmp

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memory/4584-1-0x0000000000400000-0x0000000000661000-memory.dmp

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memory/4584-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/4584-75-0x0000000000400000-0x0000000000661000-memory.dmp

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memory/4584-76-0x0000000000400000-0x0000000000661000-memory.dmp

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memory/4752-0-0x0000000000B79000-0x0000000000B7A000-memory.dmp

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