stealc | bd0619e369e9f557fa70e19f5447a08a625cec708e14459d53fdb338ecf30305

General

Target

timeSync.exe
Size

237KB
MD5

ae0792e1f93f7682ce03c8f4f9e2906b
SHA1

7056ade37113830af70ae02fe06184374c06dc90
SHA256

bd0619e369e9f557fa70e19f5447a08a625cec708e14459d53fdb338ecf30305
SHA512

95d09e2679f5bd9c53b5e36e17c013565f9245029d8dfbe4ea22810f6b444c45b5c7e77069d29e3c7e7a1c5d7a098bad1977dbcf6c310c8407278873db1710f6
SSDEEP

3072:fJOKSG+jJx3AdF7mSJief2m1KpEtbUT1nGBvUEtrSWe/qcRbP1XRQ9mtxxgwT:fJOKS/EF7kpGegrmfgIt4

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://5.42.64.41

Attributes

url_path
/40d570f44e84a454.php

rc4.plain

Signatures

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

Deletes itself 1 IoCs

pid	Process
1936	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
2396	timeSync.exe
2396	timeSync.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	timeSync.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	timeSync.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2156	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2396	timeSync.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2396 wrote to memory of 1936	2396	timeSync.exe	31
PID 2396 wrote to memory of 1936	2396	timeSync.exe	31
PID 2396 wrote to memory of 1936	2396	timeSync.exe	31
PID 2396 wrote to memory of 1936	2396	timeSync.exe	31
PID 1936 wrote to memory of 2156	1936	cmd.exe	33
PID 1936 wrote to memory of 2156	1936	cmd.exe	33
PID 1936 wrote to memory of 2156	1936	cmd.exe	33
PID 1936 wrote to memory of 2156	1936	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\timeSync.exe
"C:\Users\Admin\AppData\Local\Temp\timeSync.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2396
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\timeSync.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1936
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:2156

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

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Downloads

\ProgramData\mozglue.dll

Filesize
36KB

MD5
0f94a9545012dde854113fa1afad0b90

SHA1
9784fadce4ffaf877b20a6ed805e02e9d32409ff

SHA256
64ebb5d77fca88dc9c65327c65c0cc207ce7b82a4397a01370da934312720284

SHA512
0359e21e81b8f86d0f4fcefc177dd338df37f23a9f62ec3a91843c5f7c7ff6a587b4b0c4ddbb429b0d7096f7ee2f8c19996606105400bf28984e9fd257aa6136

Download Submit
\ProgramData\nss3.dll

Filesize
78KB

MD5
9e59913b3cdcfb6ae555e76b0cba4b35

SHA1
d9cf67470109f2923490e55fde59ba2b9cf5253f

SHA256
ce8afb6e8447d58da9ff41bde8c13b987fb500cd47d35d838c8c505efc2da6e3

SHA512
213867184ae83fad4609f54bd26fd5f9645995e545c059ebe5be279f76671729458ccd95ffabc73fe3d58dcd741f3a3507eba2c4c53d8a80a702a9240cd60d4f

Download Submit
memory/2396-1-0x0000000000230000-0x0000000000330000-memory.dmp

Filesize
1024KB

Download
memory/2396-2-0x00000000003A0000-0x00000000003BC000-memory.dmp

Filesize
112KB

Download
memory/2396-3-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/2396-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/2396-42-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/2396-68-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/2396-69-0x0000000000230000-0x0000000000330000-memory.dmp

Filesize
1024KB

Download
memory/2396-72-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/2396-74-0x0000000000230000-0x0000000000330000-memory.dmp

Filesize
1024KB

Download
memory/2396-73-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download

Analysis

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