buer | 7d185f7d580ca1574e1e5065e1be236ae7023a4cfedde087cc917bfc9e47655a

Analysis

max time kernel
144s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
23-07-2024 10:53

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General

Target

55ad3d622726d9e0ee3b6ac78186b8a9.exe
Size

835KB
MD5

55ad3d622726d9e0ee3b6ac78186b8a9
SHA1

8ddb7b17b4cf13213274ec6c9975c5386341964c
SHA256

7d185f7d580ca1574e1e5065e1be236ae7023a4cfedde087cc917bfc9e47655a
SHA512

2bccc058a8ac34a92a4afa68abe2b2c886fa369b5dbf9cb6d6c40dff3c83ec5bd3a22100e53b9aa7fc1e766d980bbf5f3b30e1d9b348fca1ec88e841bba8bbe2
SSDEEP

24576:3tWArtsJhlnUdW5arSUK31asdS+QC/c26Dp:3OJhlnUdWajs4+QCpkp

Score

10^/10

buer stealc default discovery loader spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

default

http://85.28.47.152

Attributes

url_path
/3c829f930578d648.php

Signatures

Buer
Buer is a new modular loader first seen in August 2019.
loader buer
Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3748	RegAsm.exe
3748	RegAsm.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4664 set thread context of 3748	4664	55ad3d622726d9e0ee3b6ac78186b8a9.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	RegAsm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3748	RegAsm.exe
3748	RegAsm.exe
3748	RegAsm.exe
3748	RegAsm.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4664 wrote to memory of 2356	4664	55ad3d622726d9e0ee3b6ac78186b8a9.exe	84
PID 4664 wrote to memory of 2356	4664	55ad3d622726d9e0ee3b6ac78186b8a9.exe	84
PID 4664 wrote to memory of 2356	4664	55ad3d622726d9e0ee3b6ac78186b8a9.exe	84
PID 4664 wrote to memory of 3748	4664	55ad3d622726d9e0ee3b6ac78186b8a9.exe	85
PID 4664 wrote to memory of 3748	4664	55ad3d622726d9e0ee3b6ac78186b8a9.exe	85
PID 4664 wrote to memory of 3748	4664	55ad3d622726d9e0ee3b6ac78186b8a9.exe	85
PID 4664 wrote to memory of 3748	4664	55ad3d622726d9e0ee3b6ac78186b8a9.exe	85
PID 4664 wrote to memory of 3748	4664	55ad3d622726d9e0ee3b6ac78186b8a9.exe	85
PID 4664 wrote to memory of 3748	4664	55ad3d622726d9e0ee3b6ac78186b8a9.exe	85
PID 4664 wrote to memory of 3748	4664	55ad3d622726d9e0ee3b6ac78186b8a9.exe	85
PID 4664 wrote to memory of 3748	4664	55ad3d622726d9e0ee3b6ac78186b8a9.exe	85
PID 4664 wrote to memory of 3748	4664	55ad3d622726d9e0ee3b6ac78186b8a9.exe	85

C:\Users\Admin\AppData\Local\Temp\55ad3d622726d9e0ee3b6ac78186b8a9.exe
"C:\Users\Admin\AppData\Local\Temp\55ad3d622726d9e0ee3b6ac78186b8a9.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4664
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:2356
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3748

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

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/3748-1-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/3748-3-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/3748-4-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/3748-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/3748-77-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/4664-0-0x0000000001080000-0x0000000001081000-memory.dmp

Filesize
4KB

Download