stealc | 7944f3816d40038d0921de513010f7f1d49b9ba56c18da88ee952c09fc8eab6d

Analysis

max time kernel
30s
max time network
34s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
14/06/2023, 18:33

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General

Target

Setup-x64.exe
Size

687.5MB
MD5

79d52020287e3977104d75fc7471e32a
SHA1

46dd7c10fe7bf8b9148ce75e4043c6f0bd00ba4c
SHA256

7944f3816d40038d0921de513010f7f1d49b9ba56c18da88ee952c09fc8eab6d
SHA512

a4e5a83bb233fab55fac9a717a5f297c0fb032f79fb68cac7acd6127dc41c4c88ad467c11d66a6ae8650c296ad8aae3dcdcfe93bbcc29b6082d2ac4146e83d32
SSDEEP

3072:U4Pz9hyuZrybA33ZHLnULZMBJlJJxbY/13oAbE6S91Kk7sK5ZKwBYxL6dUNX:5LTpz3Z0wxbYr4P91JsK5k3cUNX

Score

10^/10

stealc spyware stealer

Malware Config

Extracted

Family

stealc

http://185.99.133.229/4107e896e74f964e.php

Signatures

Detects Stealc stealer 2 IoCs

stealer

resource	yara_rule
behavioral1/memory/932-55-0x0000000000400000-0x000000000062A000-memory.dmp	family_stealc
behavioral1/memory/932-62-0x0000000000400000-0x000000000062A000-memory.dmp	family_stealc

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

Loads dropped DLL 2 IoCs

pid	Process
932	AppLaunch.exe
932	AppLaunch.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1612 set thread context of 932	1612	Setup-x64.exe	29

Program crash 1 IoCs

pid	pid_target	Process	procid_target
552	1612	WerFault.exe	27

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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
796	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
932	AppLaunch.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1612 wrote to memory of 932	1612	Setup-x64.exe	29
PID 1612 wrote to memory of 932	1612	Setup-x64.exe	29
PID 1612 wrote to memory of 932	1612	Setup-x64.exe	29
PID 1612 wrote to memory of 932	1612	Setup-x64.exe	29
PID 1612 wrote to memory of 932	1612	Setup-x64.exe	29
PID 1612 wrote to memory of 932	1612	Setup-x64.exe	29
PID 1612 wrote to memory of 932	1612	Setup-x64.exe	29
PID 1612 wrote to memory of 932	1612	Setup-x64.exe	29
PID 1612 wrote to memory of 932	1612	Setup-x64.exe	29
PID 1612 wrote to memory of 552	1612	Setup-x64.exe	30
PID 1612 wrote to memory of 552	1612	Setup-x64.exe	30
PID 1612 wrote to memory of 552	1612	Setup-x64.exe	30
PID 1612 wrote to memory of 552	1612	Setup-x64.exe	30
PID 1612 wrote to memory of 552	1612	Setup-x64.exe	30
PID 1612 wrote to memory of 552	1612	Setup-x64.exe	30
PID 1612 wrote to memory of 552	1612	Setup-x64.exe	30
PID 932 wrote to memory of 1684	932	AppLaunch.exe	33
PID 932 wrote to memory of 1684	932	AppLaunch.exe	33
PID 932 wrote to memory of 1684	932	AppLaunch.exe	33
PID 932 wrote to memory of 1684	932	AppLaunch.exe	33
PID 932 wrote to memory of 1684	932	AppLaunch.exe	33
PID 932 wrote to memory of 1684	932	AppLaunch.exe	33
PID 932 wrote to memory of 1684	932	AppLaunch.exe	33
PID 1684 wrote to memory of 796	1684	cmd.exe	35
PID 1684 wrote to memory of 796	1684	cmd.exe	35
PID 1684 wrote to memory of 796	1684	cmd.exe	35
PID 1684 wrote to memory of 796	1684	cmd.exe	35
PID 1684 wrote to memory of 796	1684	cmd.exe	35
PID 1684 wrote to memory of 796	1684	cmd.exe	35
PID 1684 wrote to memory of 796	1684	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\Setup-x64.exe
"C:\Users\Admin\AppData\Local\Temp\Setup-x64.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1612
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:932
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe" & del "C:\ProgramData\*.dll"" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1684
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 5
      4⤵
      Delays execution with timeout.exe
      PID:796
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 36
  2⤵
  - Program crash
  PID:552

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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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/932-54-0x0000000000400000-0x000000000062A000-memory.dmp

Filesize
2.2MB

Download
memory/932-55-0x0000000000400000-0x000000000062A000-memory.dmp

Filesize
2.2MB

Download
memory/932-60-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/932-62-0x0000000000400000-0x000000000062A000-memory.dmp

Filesize
2.2MB

Download
memory/932-63-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download