stealc | 6f7aad02384477c96833be0fef115412e2dc1c05d059f40c4ec13194e8308eeb

Analysis

max time kernel
120s
max time network
124s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
04/04/2024, 10:33

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General

Target
cf267f31af942869a51ff10d3cadb637.exe
Size 218KB
Sample240404-mlhr1sce2v
SHA256 6f7aad02384477c96833be0fef115412e2dc1c05d059f40c4ec13194e8308eeb
MD5 cf267f31af942869a51ff10d3cadb637
SHA1 6c612523c12cd2a0e71deb7114427f6656cd58dc
SHA512 36dd1d8c70f042ceb111cd6456d70a1fd7e83764441748216421fed83e2ffeea2fcd842c700c09226a5bb07a61f1c3948afcc0b10a07dd5fa827575bc0b43fd4
SSDEEP 3072:qUBTqPKGYOrEQAQB0fzahcaFnztzmrl9JrMw9ja2bwiOp:qKqPKGYOrEzQBXtnzsr54w9j/bwiO
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

http://185.172.128.26

Attributes

url_path
/f993692117a3fda2.php

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
2584	CFBFHIEBKJ.exe

Loads dropped DLL 3 IoCs

pid	Process
2036	cf267f31af942869a51ff10d3cadb637.exe
2036	cf267f31af942869a51ff10d3cadb637.exe
2688	cmd.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	cf267f31af942869a51ff10d3cadb637.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	cf267f31af942869a51ff10d3cadb637.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1972	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2036	cf267f31af942869a51ff10d3cadb637.exe
2036	cf267f31af942869a51ff10d3cadb637.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2036 wrote to memory of 2688	2036	cf267f31af942869a51ff10d3cadb637.exe	29
PID 2036 wrote to memory of 2688	2036	cf267f31af942869a51ff10d3cadb637.exe	29
PID 2036 wrote to memory of 2688	2036	cf267f31af942869a51ff10d3cadb637.exe	29
PID 2036 wrote to memory of 2688	2036	cf267f31af942869a51ff10d3cadb637.exe	29
PID 2688 wrote to memory of 2584	2688	cmd.exe	31
PID 2688 wrote to memory of 2584	2688	cmd.exe	31
PID 2688 wrote to memory of 2584	2688	cmd.exe	31
PID 2688 wrote to memory of 2584	2688	cmd.exe	31
PID 2584 wrote to memory of 1624	2584	CFBFHIEBKJ.exe	32
PID 2584 wrote to memory of 1624	2584	CFBFHIEBKJ.exe	32
PID 2584 wrote to memory of 1624	2584	CFBFHIEBKJ.exe	32
PID 2584 wrote to memory of 1624	2584	CFBFHIEBKJ.exe	32
PID 1624 wrote to memory of 1972	1624	cmd.exe	34
PID 1624 wrote to memory of 1972	1624	cmd.exe	34
PID 1624 wrote to memory of 1972	1624	cmd.exe	34
PID 1624 wrote to memory of 1972	1624	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\cf267f31af942869a51ff10d3cadb637.exe
"C:\Users\Admin\AppData\Local\Temp\cf267f31af942869a51ff10d3cadb637.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2036
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\CFBFHIEBKJ.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2688
- - C:\Users\Admin\AppData\Local\Temp\CFBFHIEBKJ.exe
    "C:\Users\Admin\AppData\Local\Temp\CFBFHIEBKJ.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:2584
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\CFBFHIEBKJ.exe
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1624
    - - C:\Windows\SysWOW64\PING.EXE
        
        ping 2.2.2.2 -n 1 -w 3000
        5⤵
        Runs ping.exe
        
        PID:1972

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

CFBFHIEBKJ.exe

Path C:\Users\Admin\AppData\Local\Temp\CFBFHIEBKJ.exe
Size 106KB
SHA256 b64a84d1f88e4e78464a1901c1cb5bbd5f00bb73203d719e64e072157a087b53
MD5 fe380780b5c35bd6d54541791151c2be
SHA1 7fe3a583cf91474c733f85cebf3c857682e269e1
SHA512 ba05ba8aa13c4bc1cf98fbf6c08b021e8b19354098e0397fc8e1e5d3dcce367c1063203f24e50d0973193f6535681d0a43486e5dade5d112853b7a2fe8739b6c
SSDEEP 1536:lIpbrxKOcuS11Phbiyn2TCdfGyJVGJkyrt517EwM+UPpe5xKOcuS11Phbiyn2TCf:KpbrsISnRGPJkGt74GsISnRF
MD5 SHA1 SHA512 SSDEEP

Submit Download

mozglue.dll

Path \ProgramData\mozglue.dll
Size 593KB
SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
MD5 c8fd9be83bc728cc04beffafc2907fe9
SHA1 95ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA512 fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
SSDEEP 12288:BlSyAom/gcRKMdRm4wFkRHuyG4RRGJVDjMk/x21R8gY/r:BKgcRKMdRm4wFkVVDGJVv//x21R8br
MD5 SHA1 SHA512 SSDEEP

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nss3.dll

Path \ProgramData\nss3.dll
Size 2.0MB
SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
MD5 1cc453cdf74f31e4d913ff9c10acdde2
SHA1 6e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA512 dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
SSDEEP 49152:fECf12gikHlnKGxJRIB+y5nvxnaOSJ3HFNWYrVvE4CQsgzMmQfTU1NrWmy4KoAzh:J7Tf8J1Q+SS5/nr
MD5 SHA1 SHA512 SSDEEP

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memory/2036-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/2036-45-0x0000000000400000-0x0000000002B60000-memory.dmp

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memory/2036-1-0x0000000002C10000-0x0000000002D10000-memory.dmp

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memory/2036-3-0x0000000000400000-0x0000000002B60000-memory.dmp

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memory/2036-72-0x0000000000400000-0x0000000002B60000-memory.dmp

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memory/2036-2-0x0000000000220000-0x0000000000247000-memory.dmp

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memory/2036-76-0x0000000002C10000-0x0000000002D10000-memory.dmp

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memory/2584-77-0x0000000073500000-0x0000000073BEE000-memory.dmp

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memory/2584-78-0x0000000000E80000-0x0000000000EA0000-memory.dmp

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memory/2584-79-0x0000000000E20000-0x0000000000E60000-memory.dmp

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memory/2584-81-0x0000000073500000-0x0000000073BEE000-memory.dmp

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