stealc | af6e8f425fcb23cf384ca01f55ed5d1eb561b7ecbfa48264ecd8b51e460953f3

Analysis

max time kernel
86s
max time network
130s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
15/09/2023, 09:41

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General

Target
ed9c0e66a6ae4b816d9f3b82247f8679.exe
Size 367KB
Sample230915-lnrl9scf66
SHA256 af6e8f425fcb23cf384ca01f55ed5d1eb561b7ecbfa48264ecd8b51e460953f3
MD5 ed9c0e66a6ae4b816d9f3b82247f8679
SHA1 dbafd9fe855342b9f93f3677e7b6bcb19d7e2086
SHA512 1111eeeebd6f2008b317ddcd943aa5d7559af4c107fccf79f9adcc99eee3a3f3d05835cac8a1a4c81b495a8894aebd9df8961da155ff77630c0f0ee19236294a
SSDEEP 6144:/btXcYjEPzDdwBW+YQrGAvDzGvCw0V5PkCIa:/5fjEvqB1YQrT7zkChZdI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

http://171.22.28.221

Attributes

url_path
/5c06c05b7b34e8e6.php

rc4.plain

Signatures

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

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045988481-1457812719-2617974652-1000\Control Panel\International\Geo\Nation	ed9c0e66a6ae4b816d9f3b82247f8679.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045988481-1457812719-2617974652-1000\Control Panel\International\Geo\Nation	8551855612.exe

Executes dropped EXE 1 IoCs

pid	Process
2372	8551855612.exe

Loads dropped DLL 2 IoCs

pid	Process
2372	8551855612.exe
2372	8551855612.exe

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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3300	2520	WerFault.exe	81
2256	2372	WerFault.exe	87

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	8551855612.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	8551855612.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1488	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2932	taskkill.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2372	8551855612.exe
2372	8551855612.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2932	taskkill.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 3376	2520	ed9c0e66a6ae4b816d9f3b82247f8679.exe	85
PID 2520 wrote to memory of 3376	2520	ed9c0e66a6ae4b816d9f3b82247f8679.exe	85
PID 2520 wrote to memory of 3376	2520	ed9c0e66a6ae4b816d9f3b82247f8679.exe	85
PID 3376 wrote to memory of 2372	3376	cmd.exe	87
PID 3376 wrote to memory of 2372	3376	cmd.exe	87
PID 3376 wrote to memory of 2372	3376	cmd.exe	87
PID 2520 wrote to memory of 4908	2520	ed9c0e66a6ae4b816d9f3b82247f8679.exe	88
PID 2520 wrote to memory of 4908	2520	ed9c0e66a6ae4b816d9f3b82247f8679.exe	88
PID 2520 wrote to memory of 4908	2520	ed9c0e66a6ae4b816d9f3b82247f8679.exe	88
PID 4908 wrote to memory of 2932	4908	cmd.exe	91
PID 4908 wrote to memory of 2932	4908	cmd.exe	91
PID 4908 wrote to memory of 2932	4908	cmd.exe	91
PID 2372 wrote to memory of 3004	2372	8551855612.exe	94
PID 2372 wrote to memory of 3004	2372	8551855612.exe	94
PID 2372 wrote to memory of 3004	2372	8551855612.exe	94
PID 3004 wrote to memory of 1488	3004	cmd.exe	97
PID 3004 wrote to memory of 1488	3004	cmd.exe	97
PID 3004 wrote to memory of 1488	3004	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\ed9c0e66a6ae4b816d9f3b82247f8679.exe
"C:\Users\Admin\AppData\Local\Temp\ed9c0e66a6ae4b816d9f3b82247f8679.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2520
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\8551855612.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3376
- - C:\Users\Admin\AppData\Local\Temp\8551855612.exe
    "C:\Users\Admin\AppData\Local\Temp\8551855612.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2372
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\8551855612.exe" & del "C:\ProgramData\*.dll"" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3004
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 5
        5⤵
        Delays execution with timeout.exe
        
        PID:1488
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2372 -s 2288
      4⤵
      Program crash
      PID:2256
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "ed9c0e66a6ae4b816d9f3b82247f8679.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\ed9c0e66a6ae4b816d9f3b82247f8679.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4908
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "ed9c0e66a6ae4b816d9f3b82247f8679.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2932
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2520 -s 1484
  2⤵
  - Program crash
  PID:3300

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2520 -ip 2520
1⤵
PID:1068

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 2372 -ip 2372
1⤵
PID:3688

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

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

Are.docx

Path C:\ProgramData\Are.docx
Size 11KB
SHA256 5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454
MD5 a33e5b189842c5867f46566bdbf7a095
SHA1 e1c06359f6a76da90d19e8fd95e79c832edb3196
SHA512 f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b
SSDEEP 192:CtNCEE33S7Ok0CMSYbcBVk6tqM16iPBkeawLWdxd7o3Lp:aNwC78uYbcBv6akwLWdxdE3Lp
MD5 SHA1 SHA512 SSDEEP

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mozglue.dll

Path C:\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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mozglue.dll

Path C:\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 C:\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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8551855612.exe

Path C:\Users\Admin\AppData\Local\Temp\8551855612.exe
Size 297KB
SHA256 929ed67122bfd8c59cc050234fe294ea5cbd81044850588a57428d93c3038c8f
MD5 c643aaedf47236d7e93dae5cba71c3d7
SHA1 d2911039de20a119cf1f340442691c782d4dc60d
SHA512 08d679a6f892ccf83afeaab10136acc0ea6cb8c5bf630fc8f6aea58b228484ad2cb74a7b3567ad9e1d3767d5c6b74351bf6dd0be9caf9e3956ab541ac15df9d6
SSDEEP 3072:1kWEIaXo/IdHhKeOYRIGTJOPjWXp+8SBJvNckyb2mEmhNhI3Eg7vT:GWCXo/IdhQq5JsW5+hJ2kyamWEi
MD5 SHA1 SHA512 SSDEEP

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8551855612.exe

Path C:\Users\Admin\AppData\Local\Temp\8551855612.exe
Size 297KB
SHA256 929ed67122bfd8c59cc050234fe294ea5cbd81044850588a57428d93c3038c8f
MD5 c643aaedf47236d7e93dae5cba71c3d7
SHA1 d2911039de20a119cf1f340442691c782d4dc60d
SHA512 08d679a6f892ccf83afeaab10136acc0ea6cb8c5bf630fc8f6aea58b228484ad2cb74a7b3567ad9e1d3767d5c6b74351bf6dd0be9caf9e3956ab541ac15df9d6
SSDEEP 3072:1kWEIaXo/IdHhKeOYRIGTJOPjWXp+8SBJvNckyb2mEmhNhI3Eg7vT:GWCXo/IdhQq5JsW5+hJ2kyamWEi
MD5 SHA1 SHA512 SSDEEP

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memory/2372-104-0x00000000007D0000-0x00000000008D0000-memory.dmp

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memory/2372-17-0x0000000000400000-0x0000000000718000-memory.dmp

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memory/2372-18-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/2372-16-0x00000000007B0000-0x00000000007CB000-memory.dmp

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memory/2372-106-0x0000000000400000-0x0000000000718000-memory.dmp

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memory/2372-105-0x0000000000400000-0x0000000000718000-memory.dmp

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memory/2372-15-0x00000000007D0000-0x00000000008D0000-memory.dmp

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memory/2520-65-0x0000000000930000-0x0000000000A30000-memory.dmp

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memory/2520-3-0x0000000000400000-0x000000000072A000-memory.dmp

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memory/2520-2-0x00000000024A0000-0x00000000024DE000-memory.dmp

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memory/2520-1-0x0000000000930000-0x0000000000A30000-memory.dmp

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memory/2520-67-0x00000000024A0000-0x00000000024DE000-memory.dmp

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memory/2520-66-0x0000000000400000-0x000000000072A000-memory.dmp

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