stealc | 76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6

Analysis

max time kernel
149s
max time network
158s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
27/03/2024, 08:32

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General

Target

76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe
Size

400KB
MD5

11e20aa257ca42b9c2542ca924e1a6e8
SHA1

3fdf848f8a6adabd8a22fe15867fb298db79c1e2
SHA256

76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6
SHA512

7c6b46b1e7cc29bd5168f8b9b41a9d64eb6c98fe6f95dedcf6427afe179710f784895a02557b546d97669ce9ad6e471f9d14b9d867607f21ca8e3d272095ae97
SSDEEP

6144:OlcU2rm3BeTtiBlMsHTlI/sCTaldjq5oUT/U3t53s7NJ6T93kAXLO2/Oo8aILP:LU2r+YTotZCYjYNo3tdkO/OxpP

Score

10^/10

stealc discovery spyware stealer upx

Malware Config

Extracted

Family

stealc

http://185.172.128.209

Attributes

url_path
/3cd2b41cbde8fc9c.php

Signatures

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

Executes dropped EXE 3 IoCs

pid	Process
1624	u134.0.exe
1064	u134.1.exe
4044	AAAAAAAAAA.exe

Loads dropped DLL 2 IoCs

pid	Process
1624	u134.0.exe
1624	u134.0.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

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x0002000000025c81-26.dat	upx
behavioral2/memory/1064-34-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral2/memory/1064-81-0x0000000000400000-0x0000000000930000-memory.dmp	upx

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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2932	1408	WerFault.exe	79
4744	1624	WerFault.exe	80

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	u134.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u134.0.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2448	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
872	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1624	u134.0.exe
1624	u134.0.exe
1624	u134.0.exe
1624	u134.0.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1064	u134.1.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1408 wrote to memory of 1624	1408	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe	80
PID 1408 wrote to memory of 1624	1408	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe	80
PID 1408 wrote to memory of 1624	1408	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe	80
PID 1408 wrote to memory of 1064	1408	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe	83
PID 1408 wrote to memory of 1064	1408	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe	83
PID 1408 wrote to memory of 1064	1408	76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe	83
PID 1064 wrote to memory of 4972	1064	u134.1.exe	87
PID 1064 wrote to memory of 4972	1064	u134.1.exe	87
PID 1064 wrote to memory of 4972	1064	u134.1.exe	87
PID 4972 wrote to memory of 2180	4972	cmd.exe	89
PID 4972 wrote to memory of 2180	4972	cmd.exe	89
PID 4972 wrote to memory of 2180	4972	cmd.exe	89
PID 4972 wrote to memory of 2448	4972	cmd.exe	90
PID 4972 wrote to memory of 2448	4972	cmd.exe	90
PID 4972 wrote to memory of 2448	4972	cmd.exe	90
PID 1624 wrote to memory of 1124	1624	u134.0.exe	91
PID 1624 wrote to memory of 1124	1624	u134.0.exe	91
PID 1624 wrote to memory of 1124	1624	u134.0.exe	91
PID 1124 wrote to memory of 4044	1124	cmd.exe	95
PID 1124 wrote to memory of 4044	1124	cmd.exe	95
PID 1124 wrote to memory of 4044	1124	cmd.exe	95
PID 4044 wrote to memory of 240	4044	AAAAAAAAAA.exe	96
PID 4044 wrote to memory of 240	4044	AAAAAAAAAA.exe	96
PID 4044 wrote to memory of 240	4044	AAAAAAAAAA.exe	96
PID 240 wrote to memory of 872	240	cmd.exe	98
PID 240 wrote to memory of 872	240	cmd.exe	98
PID 240 wrote to memory of 872	240	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe
"C:\Users\Admin\AppData\Local\Temp\76dcd11160dbe6f680c61a8e6bfb2199a6b1e63de3475ac11e01987cc2613fb6.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1408
- C:\Users\Admin\AppData\Local\Temp\u134.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u134.0.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1624
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\AAAAAAAAAA.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1124
  - - C:\Users\Admin\AppData\Local\Temp\AAAAAAAAAA.exe
      "C:\Users\Admin\AppData\Local\Temp\AAAAAAAAAA.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:4044
    - - 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\AAAAAAAAAA.exe
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:240
      - C:\Windows\SysWOW64\PING.EXE
        
        ping 2.2.2.2 -n 1 -w 3000
        6⤵
        Runs ping.exe
        
        PID:872
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1624 -s 2596
    3⤵
    - Program crash
    PID:4744
- C:\Users\Admin\AppData\Local\Temp\u134.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u134.1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1064
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4972
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:2180
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F
      4⤵
      Creates scheduled task(s)
      PID:2448
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1408 -s 1516
  2⤵
  - Program crash
  PID:2932

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1408 -ip 1408
1⤵
PID:3460

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1624 -ip 1624
1⤵
PID:1708

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

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

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Downloads

C:\ProgramData\Are.docx

Filesize
11KB

MD5
a33e5b189842c5867f46566bdbf7a095

SHA1
e1c06359f6a76da90d19e8fd95e79c832edb3196

SHA256
5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454

SHA512
f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b

Download Submit
C:\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
C:\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
C:\Users\Admin\AppData\Local\Temp\AAAAAAAAAA.exe

Filesize
106KB

MD5
fe380780b5c35bd6d54541791151c2be

SHA1
7fe3a583cf91474c733f85cebf3c857682e269e1

SHA256
b64a84d1f88e4e78464a1901c1cb5bbd5f00bb73203d719e64e072157a087b53

SHA512
ba05ba8aa13c4bc1cf98fbf6c08b021e8b19354098e0397fc8e1e5d3dcce367c1063203f24e50d0973193f6535681d0a43486e5dade5d112853b7a2fe8739b6c

Download Submit
C:\Users\Admin\AppData\Local\Temp\u134.0.exe

Filesize
256KB

MD5
82b83e67d3fbc356a07420923abeed36

SHA1
4887991a4b7d243d3f343aa111027a9f4fd03ecd

SHA256
27d68b0754c0074f513e931700be53ba16fdcd76401bcf87149d46b5ba4e4be0

SHA512
8690c2d1aaf663457707f2b9cf6b0ad26af4a9a5dab2fc77f77064579ab2b4abdd45d339f02fc4f865034ec945672ce76b48ec187330ee8910bf1c1a489b0588

Download Submit
C:\Users\Admin\AppData\Local\Temp\u134.1.exe

Filesize
1.7MB

MD5
eee5ddcffbed16222cac0a1b4e2e466e

SHA1
28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

SHA256
2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

SHA512
8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

Download Submit
C:\Users\Admin\AppData\Roaming\Temp\Task.bat

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
memory/1064-34-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/1064-81-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/1064-35-0x00000000028E0000-0x00000000028E1000-memory.dmp

Filesize
4KB

Download
memory/1064-87-0x00000000028E0000-0x00000000028E1000-memory.dmp

Filesize
4KB

Download
memory/1408-1-0x0000000000740000-0x0000000000840000-memory.dmp

Filesize
1024KB

Download
memory/1408-19-0x0000000000740000-0x0000000000840000-memory.dmp

Filesize
1024KB

Download
memory/1408-13-0x0000000000400000-0x0000000000569000-memory.dmp

Filesize
1.4MB

Download
memory/1408-3-0x0000000000400000-0x0000000000569000-memory.dmp

Filesize
1.4MB

Download
memory/1408-2-0x0000000002400000-0x000000000246E000-memory.dmp

Filesize
440KB

Download
memory/1408-78-0x0000000000400000-0x0000000000569000-memory.dmp

Filesize
1.4MB

Download
memory/1624-17-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1624-128-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1624-39-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1624-94-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1624-99-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1624-33-0x0000000000960000-0x0000000000A60000-memory.dmp

Filesize
1024KB

Download
memory/1624-16-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1624-121-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1624-15-0x0000000002340000-0x0000000002367000-memory.dmp

Filesize
156KB

Download
memory/1624-79-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1624-135-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/1624-14-0x0000000000960000-0x0000000000A60000-memory.dmp

Filesize
1024KB

Download
memory/1624-146-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4044-144-0x0000000071F40000-0x00000000726F1000-memory.dmp

Filesize
7.7MB

Download
memory/4044-145-0x00000000054D0000-0x00000000054E0000-memory.dmp

Filesize
64KB

Download
memory/4044-143-0x0000000000980000-0x00000000009A0000-memory.dmp

Filesize
128KB

Download
memory/4044-149-0x0000000071F40000-0x00000000726F1000-memory.dmp

Filesize
7.7MB

Download