stealc | f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05

Analysis

max time kernel
93s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
09/06/2024, 10:45

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General

Target
f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe
Size 463KB
Sample240609-mtkxcahe7v
SHA256 f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05
MD5 9c2b900d014ba5b9dfd0ca6cef201753
SHA1 e5705841f68d9443ba5efb553aa9f87556e403e5
SHA512 5f92c1cff9312b100feca38c4ad8aa82af351d9ca01c420ed44f154fe8c1e3c9027fcffcf9578748601bc29708e8df0969bd4cdc1732a819fb37006a769b13d4
SSDEEP 12288:4seLUscjnY6sJnCWH4UbmCJbbdKofwk/TsyVhpceSvbCq66imuXd6cWD/pWc0GMX:47U17
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc cuapfss spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

cuapfss

http://23.88.106.134

Attributes

url_path
/6a9f8e2503d99c04.php

Signatures

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

Loads dropped DLL 3 IoCs

pid	Process
4116	f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe
2040	aspnet_regiis.exe
2040	aspnet_regiis.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4116 set thread context of 2040	4116	f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.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	aspnet_regiis.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	aspnet_regiis.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2040	aspnet_regiis.exe
2040	aspnet_regiis.exe
2040	aspnet_regiis.exe
2040	aspnet_regiis.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4116 wrote to memory of 2040	4116	f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe	85
PID 4116 wrote to memory of 2040	4116	f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe	85
PID 4116 wrote to memory of 2040	4116	f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe	85
PID 4116 wrote to memory of 2040	4116	f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe	85
PID 4116 wrote to memory of 2040	4116	f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe	85
PID 4116 wrote to memory of 2040	4116	f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe	85
PID 4116 wrote to memory of 2040	4116	f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe	85
PID 4116 wrote to memory of 2040	4116	f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe	85
PID 4116 wrote to memory of 2040	4116	f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe	85

C:\Users\Admin\AppData\Local\Temp\f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe
"C:\Users\Admin\AppData\Local\Temp\f9e3368715092e6a197adf1ae64d6fbe059252b4fbaf317fab7b3e90281b5d05.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4116
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe"
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2040

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

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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d3d9.dll

Path C:\Users\Admin\AppData\Roaming\d3d9.dll
Size 266KB
SHA256 e0b2aa87dafb8977c806c5bfada424e7dae2e41995b8974d72ee455513262ea5
MD5 a16bfdd7c9f753a43f3eaa5522ba9d9d
SHA1 36381482314ab4845531e4875c1fe520b50d1fe4
SHA512 fc700ef5a63f3ca9141991f9aea64f1b5958c6895c27b1763791736219c0cdd8d033b9d4d7f9a4d435ab86a14c5ec4a12f69298bd7a9ee6fade9ee98efb1b846
SSDEEP 6144:XYaqOCMQK9syh0bxdWPhT917U4ji8U7kV:oaqOCMRyx2/fjn
MD5 SHA1 SHA512 SSDEEP

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memory/2040-15-0x00000000006B0000-0x00000000008EB000-memory.dmp

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memory/2040-12-0x00000000006B0000-0x00000000008EB000-memory.dmp

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memory/2040-10-0x00000000006B0000-0x00000000008EB000-memory.dmp

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memory/2040-18-0x00000000006B0000-0x00000000008EB000-memory.dmp

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memory/2040-19-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/2040-85-0x00000000006B0000-0x00000000008EB000-memory.dmp

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memory/4116-0-0x0000000074EAE000-0x0000000074EAF000-memory.dmp

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memory/4116-16-0x0000000077941000-0x0000000077A61000-memory.dmp

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memory/4116-17-0x0000000074EA0000-0x0000000075650000-memory.dmp

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memory/4116-2-0x0000000001220000-0x0000000001226000-memory.dmp

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memory/4116-1-0x00000000008E0000-0x000000000095E000-memory.dmp

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