stealc | 0552f23284ed52e84060cdc66d242f9258bbe0555eab899355b9d848bbf70605

General

Target

file.exe
Size

199KB
MD5

0d66d350365b5dbf9a587b31b052defa
SHA1

340e95b5c4cc66c1de7ae69cab5f8c6044cd5e12
SHA256

0552f23284ed52e84060cdc66d242f9258bbe0555eab899355b9d848bbf70605
SHA512

7430ff96e6d144fa7a3317c686009acb810a86a5cf0137bf7a33bfc479f3c6fb88f928548b4dddebd03b8decd36396679ff8b97a7c177884ac328447d781d3fa
SSDEEP

3072:d+0HYeO0w76p8WiayDKwGJllF0nXH6mpCxic7LHaP0+PMH71uqc:seXO88BasKw+llF0DpuiCHO0+PMBu

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://bernardofata.icu

Attributes

url_path
/40d570f44e84a454.php

rc4.plain

Signatures

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

Checks computer location settings 2 TTPs 1 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-1-5-21-3811856890-180006922-3689258494-1000\Control Panel\International\Geo\Nation	file.exe

Loads dropped DLL 2 IoCs

pid	Process
2440	file.exe
2440	file.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 1 IoCs

pid	pid_target	Process	procid_target
904	2440	WerFault.exe	85

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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4368	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2440	file.exe
2440	file.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 3924	2440	file.exe	99
PID 2440 wrote to memory of 3924	2440	file.exe	99
PID 2440 wrote to memory of 3924	2440	file.exe	99
PID 3924 wrote to memory of 4368	3924	cmd.exe	102
PID 3924 wrote to memory of 4368	3924	cmd.exe	102
PID 3924 wrote to memory of 4368	3924	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\file.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3924
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:4368
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2440 -s 2396
  2⤵
  - Program crash
  PID:904

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 2440 -ip 2440
1⤵
PID:2700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

2

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\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
memory/2440-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/2440-55-0x0000000000400000-0x00000000007BB000-memory.dmp

Filesize
3.7MB

Download
memory/2440-56-0x0000000000BA0000-0x0000000000CA0000-memory.dmp

Filesize
1024KB

Download
memory/2440-42-0x0000000000400000-0x00000000007BB000-memory.dmp

Filesize
3.7MB

Download
memory/2440-1-0x0000000000BA0000-0x0000000000CA0000-memory.dmp

Filesize
1024KB

Download
memory/2440-3-0x0000000000400000-0x00000000007BB000-memory.dmp

Filesize
3.7MB

Download
memory/2440-81-0x0000000000400000-0x00000000007BB000-memory.dmp

Filesize
3.7MB

Download
memory/2440-2-0x0000000000B60000-0x0000000000B7B000-memory.dmp

Filesize
108KB

Download
memory/2440-87-0x0000000000400000-0x00000000007BB000-memory.dmp

Filesize
3.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads