stealc | a1422d78eccbfe84a145cce093bfacf4b5e0e5cf81f1ce82a94c35ffa4172ecd

Analysis

max time kernel
31s
max time network
33s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
28-05-2023 00:51

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General

Target

a68a853fdb8d2d5ed774bb57a5511984.exe
Size

81KB
MD5

a68a853fdb8d2d5ed774bb57a5511984
SHA1

4a0290dd5d4b5611a098f58cfc2bb0b3dab878a4
SHA256

a1422d78eccbfe84a145cce093bfacf4b5e0e5cf81f1ce82a94c35ffa4172ecd
SHA512

5be530397719e4cf1920d74ac7befd20a433d9b91c42ad6713164b4f9b6620260451f41ee1e31dea1198d5e7affff60756e602de3790b85b4d3e8eeb72120b43
SSDEEP

1536:IAbFlbgwBPLqmQIsUDQvPp6CtZEhG6SufhiciljtIu3Li6TdY:IAbF9gwBPLzwsQHp6CHEhzSuJxizI0e6

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

http://77.105.146.130/5196ba262b6d60e7.php

Signatures

Detects Stealc stealer 1 IoCs

stealer

resource	yara_rule
behavioral1/memory/1072-111-0x0000000000280000-0x00000000004A9000-memory.dmp	family_stealc

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

Deletes itself 1 IoCs

pid	Process
1932	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1072	a68a853fdb8d2d5ed774bb57a5511984.exe
1072	a68a853fdb8d2d5ed774bb57a5511984.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
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
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	a68a853fdb8d2d5ed774bb57a5511984.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a68a853fdb8d2d5ed774bb57a5511984.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1952	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1072	a68a853fdb8d2d5ed774bb57a5511984.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1072 wrote to memory of 1932	1072	a68a853fdb8d2d5ed774bb57a5511984.exe	29
PID 1072 wrote to memory of 1932	1072	a68a853fdb8d2d5ed774bb57a5511984.exe	29
PID 1072 wrote to memory of 1932	1072	a68a853fdb8d2d5ed774bb57a5511984.exe	29
PID 1072 wrote to memory of 1932	1072	a68a853fdb8d2d5ed774bb57a5511984.exe	29
PID 1932 wrote to memory of 1952	1932	cmd.exe	31
PID 1932 wrote to memory of 1952	1932	cmd.exe	31
PID 1932 wrote to memory of 1952	1932	cmd.exe	31
PID 1932 wrote to memory of 1952	1932	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\a68a853fdb8d2d5ed774bb57a5511984.exe
"C:\Users\Admin\AppData\Local\Temp\a68a853fdb8d2d5ed774bb57a5511984.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1072
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\a68a853fdb8d2d5ed774bb57a5511984.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1932
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1952

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

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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/1072-54-0x0000000000280000-0x00000000004A9000-memory.dmp

Filesize
2.2MB

Download
memory/1072-55-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1072-111-0x0000000000280000-0x00000000004A9000-memory.dmp

Filesize
2.2MB

Download