stealc | 3bc752d2803f660c3216bcfa6fcd3cfb03b21b8753d4bec32f4e679af854028a

Analysis

max time kernel
94s
max time network
119s
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, 02:43

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General

Target
f06e4aeb68de3502871c2899e96cd410.exe
Size 502KB
Sample241007-c7khmaveld
SHA256 3bc752d2803f660c3216bcfa6fcd3cfb03b21b8753d4bec32f4e679af854028a
MD5 f06e4aeb68de3502871c2899e96cd410
SHA1 2caf84657845bfe75b60f83f9fa01d1212f8670b
SHA512 cc5b94c108300b8eedbdff51d6849683d7ece59c91a6daf2afaeddcb0b8d2cdf214c0bb6751ba158ebdbc3a7cde811eff225947728493c17c61ee87ebae6ced3
SSDEEP 12288:EK2bpydeHVFhfXu7UG/SPbc7Rb9CdNGZrKC:EKIydidXfGKwRofGVb
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-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
3356	MSBuild.exe
3356	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 1948 set thread context of 3356	1948	f06e4aeb68de3502871c2899e96cd410.exe	82

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	f06e4aeb68de3502871c2899e96cd410.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
3356	MSBuild.exe
3356	MSBuild.exe
3356	MSBuild.exe
3356	MSBuild.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2752	cmd.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1948 wrote to memory of 3356	1948	f06e4aeb68de3502871c2899e96cd410.exe	82
PID 1948 wrote to memory of 3356	1948	f06e4aeb68de3502871c2899e96cd410.exe	82
PID 1948 wrote to memory of 3356	1948	f06e4aeb68de3502871c2899e96cd410.exe	82
PID 1948 wrote to memory of 3356	1948	f06e4aeb68de3502871c2899e96cd410.exe	82
PID 1948 wrote to memory of 3356	1948	f06e4aeb68de3502871c2899e96cd410.exe	82
PID 1948 wrote to memory of 3356	1948	f06e4aeb68de3502871c2899e96cd410.exe	82
PID 1948 wrote to memory of 3356	1948	f06e4aeb68de3502871c2899e96cd410.exe	82
PID 1948 wrote to memory of 3356	1948	f06e4aeb68de3502871c2899e96cd410.exe	82
PID 1948 wrote to memory of 3356	1948	f06e4aeb68de3502871c2899e96cd410.exe	82
PID 3356 wrote to memory of 2752	3356	MSBuild.exe	83
PID 3356 wrote to memory of 2752	3356	MSBuild.exe	83
PID 3356 wrote to memory of 2752	3356	MSBuild.exe	83

C:\Users\Admin\AppData\Local\Temp\f06e4aeb68de3502871c2899e96cd410.exe
"C:\Users\Admin\AppData\Local\Temp\f06e4aeb68de3502871c2899e96cd410.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1948
- 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:3356
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\AdminAKECBFBAEB.exe"
    3⤵
    - Checks computer location settings
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2752

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/1948-0-0x0000000000619000-0x000000000061A000-memory.dmp

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memory/3356-1-0x0000000000400000-0x0000000000661000-memory.dmp

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memory/3356-3-0x0000000000400000-0x0000000000661000-memory.dmp

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memory/3356-4-0x0000000000400000-0x0000000000661000-memory.dmp

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memory/3356-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/3356-75-0x0000000000400000-0x0000000000661000-memory.dmp

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memory/3356-76-0x0000000000400000-0x0000000000661000-memory.dmp

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