stealc | 2d63ff4e2c1bde1601315d12ea75a52c90b7e203f8a8e6140ab1da2e0d8a9554

General

Target

file.exe
Size

327KB
MD5

1c5c4583fac0f0a8d4d5cce4f09fea4b
SHA1

93cbd37b219bca4782868d1cff6b009f7d83a81f
SHA256

2d63ff4e2c1bde1601315d12ea75a52c90b7e203f8a8e6140ab1da2e0d8a9554
SHA512

98ecba4533f4cf3ab99338783e4899a01b15358113982139f676ee64841ae08a3729660c2f8feaa6789af0926955d1ff3ed694c791effd3370f936ca95d19b11
SSDEEP

6144:PrJ+KUXaXzLZYZEcpbz03Tiaz/5b+hyDt0DfIgL3yUG80dS4Dk+xkAQpA6hh/xJ:PV+KMaXfZYZEcpbID9RL2ss3yN8Z4Qnd

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-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	RegAsm.exe

Loads dropped DLL 2 IoCs

pid	Process
4888	RegAsm.exe
4888	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 3 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

Credentials from Web Browsers
T1555.003
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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2992 set thread context of 4888	2992	file.exe	84

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4888	RegAsm.exe
4888	RegAsm.exe
4888	RegAsm.exe
4888	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 4964	2992	file.exe	83
PID 2992 wrote to memory of 4964	2992	file.exe	83
PID 2992 wrote to memory of 4964	2992	file.exe	83
PID 2992 wrote to memory of 4888	2992	file.exe	84
PID 2992 wrote to memory of 4888	2992	file.exe	84
PID 2992 wrote to memory of 4888	2992	file.exe	84
PID 2992 wrote to memory of 4888	2992	file.exe	84
PID 2992 wrote to memory of 4888	2992	file.exe	84
PID 2992 wrote to memory of 4888	2992	file.exe	84
PID 2992 wrote to memory of 4888	2992	file.exe	84
PID 2992 wrote to memory of 4888	2992	file.exe	84
PID 2992 wrote to memory of 4888	2992	file.exe	84
PID 4888 wrote to memory of 4828	4888	RegAsm.exe	85
PID 4888 wrote to memory of 4828	4888	RegAsm.exe	85
PID 4888 wrote to memory of 4828	4888	RegAsm.exe	85

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:4964
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks computer location settings
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4888
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\AdminCGDBFBGIDH.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4828

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

3

T1012

System Information Discovery

3

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

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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
C:\Users\AdminCGDBFBGIDH.exe

Filesize
146B

MD5
8eec510e57f5f732fd2cce73df7b73ef

SHA1
3c0af39ecb3753c5fee3b53d063c7286019eac3b

SHA256
55f7d9e99b8e2d4e0e193b2f0275501e6d9c1ebd29cadbea6a0da48a8587e3e0

SHA512
73bbf698482132b5fd60a0b58926fddec9055f8095a53bc52714e211e9340c3419736ceafd6b279667810114d306bfccdcfcddf51c0b67fe9e3c73c54583e574

Download Submit
memory/2992-1-0x00000000004C0000-0x0000000000516000-memory.dmp

Filesize
344KB

Download
memory/2992-2-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/2992-0-0x0000000074ABE000-0x0000000074ABF000-memory.dmp

Filesize
4KB

Download
memory/2992-6-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/2992-9-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/4888-4-0x0000000000400000-0x0000000000661000-memory.dmp

Filesize
2.4MB

Download
memory/4888-11-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/4888-10-0x0000000000400000-0x0000000000661000-memory.dmp

Filesize
2.4MB

Download
memory/4888-8-0x0000000000400000-0x0000000000661000-memory.dmp

Filesize
2.4MB

Download
memory/4888-85-0x0000000000400000-0x0000000000661000-memory.dmp

Filesize
2.4MB

Download
memory/4888-86-0x0000000000400000-0x0000000000661000-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