stealc | 66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849

General

Target

66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe
Size

493KB
MD5

9d12c4ebf544f59c5778b070defbe130
SHA1

7bd747844eab8ff263b75ace7537c8b7d163e20d
SHA256

66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849
SHA512

a20b043bbbccde6a8551ecad395d705707afc83516465b5ffaae258e4a22b4782760f1ae59b9612764b47fe339ed0de0b73e302bbc0e25b0f910aee533213997
SSDEEP

12288:C/l9sitPVq0+PC7yuotJWyCi3vS9J1LHyh8mr5W5Eeo4S:CsitS4FkJWye9J1sJ5W57p

Score

10^/10

stealc default credential_access discovery spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

default

C2

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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
4520	MSBuild.exe
4520	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 4408 set thread context of 4520	4408	66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe	83

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5092	4408	WerFault.exe	82

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	66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.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
4520	MSBuild.exe
4520	MSBuild.exe
4520	MSBuild.exe
4520	MSBuild.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4408	cmd.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4408 wrote to memory of 4520	4408	66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe	83
PID 4408 wrote to memory of 4520	4408	66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe	83
PID 4408 wrote to memory of 4520	4408	66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe	83
PID 4408 wrote to memory of 4520	4408	66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe	83
PID 4408 wrote to memory of 4520	4408	66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe	83
PID 4408 wrote to memory of 4520	4408	66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe	83
PID 4408 wrote to memory of 4520	4408	66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe	83
PID 4408 wrote to memory of 4520	4408	66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe	83
PID 4408 wrote to memory of 4520	4408	66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe	83
PID 4520 wrote to memory of 4408	4520	MSBuild.exe	95
PID 4520 wrote to memory of 4408	4520	MSBuild.exe	95
PID 4520 wrote to memory of 4408	4520	MSBuild.exe	95

C:\Users\Admin\AppData\Local\Temp\66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe
"C:\Users\Admin\AppData\Local\Temp\66fbc128c741b0d895e723e7ef1bc7f2a953beda60cbebf55b8f8139926d4849.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4408
- 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:4520
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\ProgramData\IJKFIIIJJK.exe"
    3⤵
    - Checks computer location settings
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:4408
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4408 -s 216
  2⤵
  - Program crash
  PID:5092

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4408 -ip 4408
1⤵
PID:1960

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

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/4408-0-0x000000000069A000-0x000000000069B000-memory.dmp

Filesize
4KB

Download
memory/4520-2-0x0000000000400000-0x0000000000661000-memory.dmp

Filesize
2.4MB

Download
memory/4520-3-0x0000000000400000-0x0000000000661000-memory.dmp

Filesize
2.4MB

Download
memory/4520-4-0x0000000000400000-0x0000000000661000-memory.dmp

Filesize
2.4MB

Download
memory/4520-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/4520-44-0x0000000000400000-0x0000000000661000-memory.dmp

Filesize
2.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads