stealc | ee26742f1bab476b9a61e1ace78883e3fd0d0534c35a9839d333b6bc0274f7e0

General

Target

tmp.exe
Size

220KB
MD5

ca4524d6dcbf612d26136531cfe42304
SHA1

58869b0cd033706048cc83ca4d22d659fa94f2f6
SHA256

ee26742f1bab476b9a61e1ace78883e3fd0d0534c35a9839d333b6bc0274f7e0
SHA512

48cb6061b052a988a504f0ad0818bbd5c096b0a5853a2563d8aafd57261829682732ee373504d5956ee81187dc6bad0fe8d1b9f311706e5aa35b78e4a3b0e06c
SSDEEP

3072:isWjEgVMuYCYhDgq0fsE13ZTouFbqSGY/2HKnOC7vIjeBrmf:iljEgVMuNNsK3CuBPjWKnf

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.24

Attributes

url_path
/40d570f44e84a4�4.php

rc4.plain

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

2696 cmd.exe
Loads dropped DLL 2 IoCs

Processes:

tmp.exe

pid process

2960 tmp.exe
2960 tmp.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

pid	process
2696	cmd.exe

pid	process
2960	tmp.exe
2960	tmp.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

Processes:

tmp.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	tmp.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	tmp.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2996 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

tmp.exe

pid process

2960 tmp.exe

pid	process
2996	timeout.exe

pid	process
2960	tmp.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

tmp.execmd.exe

description	pid	process	target process
PID 2960 wrote to memory of 2696	2960	tmp.exe	cmd.exe
PID 2960 wrote to memory of 2696	2960	tmp.exe	cmd.exe
PID 2960 wrote to memory of 2696	2960	tmp.exe	cmd.exe
PID 2960 wrote to memory of 2696	2960	tmp.exe	cmd.exe
PID 2696 wrote to memory of 2996	2696	cmd.exe	timeout.exe
PID 2696 wrote to memory of 2996	2696	cmd.exe	timeout.exe
PID 2696 wrote to memory of 2996	2696	cmd.exe	timeout.exe
PID 2696 wrote to memory of 2996	2696	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2960

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\tmp.exe" & del "C:\ProgramData\*.dll"" & exit
2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:2696

C:\Windows\SysWOW64\timeout.exe
timeout /t 5
3⤵
- Delays execution with timeout.exe
PID:2996

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

Replay Monitor

Loading Replay Monitor...

Downloads

\ProgramData\mozglue.dll
Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
\ProgramData\nss3.dll
Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
memory/2960-2-0x0000000000220000-0x000000000023C000-memory.dmp

Filesize
112KB

Download
memory/2960-1-0x0000000000740000-0x0000000000840000-memory.dmp

Filesize
1024KB

Download
memory/2960-3-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/2960-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/2960-63-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/2960-73-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/2960-74-0x0000000000740000-0x0000000000840000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing