stealc | 15cdd7b6d90535beeda078d371f868380127c99bfe8e0122201a0ea7b8a2959f

General

Target
4fba79b2f5bb7a1670e6d0bfa4b663a7.exe
Size 280KB
Sample231226-rdt8asecd8
SHA256 15cdd7b6d90535beeda078d371f868380127c99bfe8e0122201a0ea7b8a2959f
MD5 4fba79b2f5bb7a1670e6d0bfa4b663a7
SHA1 fe1417406b8a943d6f5ee25aaa22b5a39060c51e
SHA512 437a668666d38e384db1273b79b307ffb5504798c38e2d383bb6d24e601dcbe091860f64b46e66d8b469302ee0d3eaaa578bad869842f6e20423755a3df1624d
SSDEEP 6144:5K+o9P1T8dLGuugLHxomQac3eAO8NPkjYvl:5Y9P6dCgLHxQT3/Tk8
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://5.42.66.58

Attributes

url_path
/3886d2276f6914c4.php

rc4.plain

Signatures

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

Deletes itself 1 IoCs

pid	Process
2516	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
2116	4fba79b2f5bb7a1670e6d0bfa4b663a7.exe
2116	4fba79b2f5bb7a1670e6d0bfa4b663a7.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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	4fba79b2f5bb7a1670e6d0bfa4b663a7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	4fba79b2f5bb7a1670e6d0bfa4b663a7.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2176	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2116	4fba79b2f5bb7a1670e6d0bfa4b663a7.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2116 wrote to memory of 2516	2116	4fba79b2f5bb7a1670e6d0bfa4b663a7.exe	29
PID 2116 wrote to memory of 2516	2116	4fba79b2f5bb7a1670e6d0bfa4b663a7.exe	29
PID 2116 wrote to memory of 2516	2116	4fba79b2f5bb7a1670e6d0bfa4b663a7.exe	29
PID 2116 wrote to memory of 2516	2116	4fba79b2f5bb7a1670e6d0bfa4b663a7.exe	29
PID 2516 wrote to memory of 2176	2516	cmd.exe	31
PID 2516 wrote to memory of 2176	2516	cmd.exe	31
PID 2516 wrote to memory of 2176	2516	cmd.exe	31
PID 2516 wrote to memory of 2176	2516	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\4fba79b2f5bb7a1670e6d0bfa4b663a7.exe
"C:\Users\Admin\AppData\Local\Temp\4fba79b2f5bb7a1670e6d0bfa4b663a7.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2116
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\4fba79b2f5bb7a1670e6d0bfa4b663a7.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2516
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:2176

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

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

nss3.dll

Path \ProgramData\nss3.dll
Size 92KB
SHA256 3b4e780076a09e845ca2a460249b1797887680be538bd3cca19e1c272102b1c8
MD5 1f722904fc3eb7b0f196db1267307dff
SHA1 75a5b636f28445a5cdfd73a20fbe20202bdfc292
SHA512 f29f50d3640c802c3ba3698308008d48b21eba0a0d0b32e1441401d70e2740ae0a3bd348d7d1098da8c1c8bebd23efb5ca7b4b5d8d70c4ba5cb57df648552fe8
SSDEEP 1536:SRzsFXhMyGK2FijgQOGPJBFx/ae9L2yYlbRiIYW1HA8F+HmziLw+R6OpmdHQm4y0:SOFXiyGKomgtwJBFx/1L2XlbR1YyA8Fi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2116-1-0x00000000006E0000-0x00000000007E0000-memory.dmp

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memory/2116-2-0x0000000000220000-0x000000000023C000-memory.dmp

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memory/2116-3-0x0000000000400000-0x000000000062E000-memory.dmp

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memory/2116-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/2116-42-0x0000000000400000-0x000000000062E000-memory.dmp

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memory/2116-65-0x0000000000400000-0x000000000062E000-memory.dmp

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memory/2116-66-0x00000000006E0000-0x00000000007E0000-memory.dmp

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memory/2116-69-0x0000000000400000-0x000000000062E000-memory.dmp

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memory/2116-70-0x00000000006E0000-0x00000000007E0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads