stealc | a52921112e0ccf922d4dbf38d241e5d03fb77bf9940354b37581d4d1c6d86054

Analysis

max time kernel
117s
max time network
122s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
02/08/2023, 09:09

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General

Target
b2c05d6fee47f1c3b44226a8af13f799.exe
Size 296KB
Sample230802-k4gassfa4x
SHA256 a52921112e0ccf922d4dbf38d241e5d03fb77bf9940354b37581d4d1c6d86054
MD5 b2c05d6fee47f1c3b44226a8af13f799
SHA1 45eab9a0ee2b79760788547b2cc98fb412c40c1c
SHA512 8328dd08b31dacdcc992dd55ce680e39700699660c5a3704cbbde3c6d4dee88a7017dfbde4f247d8d9639f1d1259cc96a42d9c7fd5a85f13711423801a7224eb
SSDEEP 6144:DaQxR/d4ZuHkLvKzM+QvsBL70F4X5XMyItG+:OQF4ZuEjKHQvsBL4F4J8yK
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc spyware stealer

Malware Config

Extracted

Family

stealc

http://adriaenclaeys.top/e9c345fc99a4e67e.php

Signatures

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

Deletes itself 1 IoCs

pid	Process
2736	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
2236	b2c05d6fee47f1c3b44226a8af13f799.exe
2236	b2c05d6fee47f1c3b44226a8af13f799.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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2160	timeout.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2236	b2c05d6fee47f1c3b44226a8af13f799.exe
2236	b2c05d6fee47f1c3b44226a8af13f799.exe
2236	b2c05d6fee47f1c3b44226a8af13f799.exe
2236	b2c05d6fee47f1c3b44226a8af13f799.exe
2236	b2c05d6fee47f1c3b44226a8af13f799.exe
2236	b2c05d6fee47f1c3b44226a8af13f799.exe
2236	b2c05d6fee47f1c3b44226a8af13f799.exe
2236	b2c05d6fee47f1c3b44226a8af13f799.exe
2236	b2c05d6fee47f1c3b44226a8af13f799.exe
2236	b2c05d6fee47f1c3b44226a8af13f799.exe
2236	b2c05d6fee47f1c3b44226a8af13f799.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 2736	2236	b2c05d6fee47f1c3b44226a8af13f799.exe	32
PID 2236 wrote to memory of 2736	2236	b2c05d6fee47f1c3b44226a8af13f799.exe	32
PID 2236 wrote to memory of 2736	2236	b2c05d6fee47f1c3b44226a8af13f799.exe	32
PID 2236 wrote to memory of 2736	2236	b2c05d6fee47f1c3b44226a8af13f799.exe	32
PID 2736 wrote to memory of 2160	2736	cmd.exe	34
PID 2736 wrote to memory of 2160	2736	cmd.exe	34
PID 2736 wrote to memory of 2160	2736	cmd.exe	34
PID 2736 wrote to memory of 2160	2736	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\b2c05d6fee47f1c3b44226a8af13f799.exe
"C:\Users\Admin\AppData\Local\Temp\b2c05d6fee47f1c3b44226a8af13f799.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b2c05d6fee47f1c3b44226a8af13f799.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2736
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:2160

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

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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/2236-57-0x0000000000400000-0x0000000002439000-memory.dmp

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memory/2236-54-0x0000000000220000-0x0000000000235000-memory.dmp

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memory/2236-58-0x0000000000220000-0x0000000000235000-memory.dmp

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memory/2236-59-0x0000000000240000-0x000000000025B000-memory.dmp

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memory/2236-61-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/2236-68-0x0000000000400000-0x0000000002439000-memory.dmp

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memory/2236-56-0x0000000000400000-0x0000000002439000-memory.dmp

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memory/2236-55-0x0000000000240000-0x000000000025B000-memory.dmp

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memory/2236-117-0x0000000000400000-0x0000000002439000-memory.dmp

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memory/2236-123-0x0000000000400000-0x0000000002439000-memory.dmp

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memory/2236-126-0x0000000000400000-0x0000000002439000-memory.dmp

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