marsstealer | 720a55a4a626fa83be8c819cdcdf0c6f5ddeb51b15801f206f97874d0af47748

Analysis

max time kernel
79s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20230221-en
resource tags

arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
submitted
04/03/2023, 07:12

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General

Target
Builded.exe
Size 159KB
Sample230304-h1hcksce41
SHA256 720a55a4a626fa83be8c819cdcdf0c6f5ddeb51b15801f206f97874d0af47748
MD5 63c8c66405bd96fa529429495fe99710
SHA1 da05b7516df1487c4ee6376d34215a6aac2f2521
SHA512 1f220a5b6cd84d7e989af30fb00e7bf8d1d40bce8dc04c5dbbc1ecd49256ed8030c7c46049084abbfae4363e9ab2259b00f4d9417492e78c97980aebb42833fd
SSDEEP 3072:UJ2KmrjrgJU1dMAc20+2PBesdCWsFLZecoBoen1TJSp8Bb8EG:R5gJU1mAv0hJeSsFLocodJ8EG
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

marsstealer default discovery spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

81.240.108.170/gate.php

Signatures

Mars Stealer
An infostealer written in C++ based on other infostealers.
stealer marsstealer

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-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	Builded.exe

Loads dropped DLL 2 IoCs

pid	Process
2376	Builded.exe
2376	Builded.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). Likely ransomware behaviour.

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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3740	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 4972	2376	Builded.exe	91
PID 2376 wrote to memory of 4972	2376	Builded.exe	91
PID 2376 wrote to memory of 4972	2376	Builded.exe	91
PID 4972 wrote to memory of 3740	4972	cmd.exe	93
PID 4972 wrote to memory of 3740	4972	cmd.exe	93
PID 4972 wrote to memory of 3740	4972	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\Builded.exe
"C:\Users\Admin\AppData\Local\Temp\Builded.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:2376
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\Builded.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4972
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:3740

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

mozglue.dll

Path C:\ProgramData\mozglue.dll
Size 133KB
SHA256 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
MD5 8f73c08a9660691143661bf7332c3c27
SHA1 37fa65dd737c50fda710fdbde89e51374d0c204a
SHA512 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
SSDEEP 3072:7Gyzk/x2Wp53pUzPoNpj/kVghp1qt/dXDyp4D2JJJvPhrSeTuk:6yQ2Wp53iO/kVghp12/dXDyyD2JJJvPR
MD5 SHA1 SHA512 SSDEEP

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nss3.dll

Path C:\ProgramData\nss3.dll
Size 1.2MB
SHA256 e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
MD5 bfac4e3c5908856ba17d41edcd455a51
SHA1 8eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA512 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
SSDEEP 24576:Sb5zzlswYNYLVJAwfpeYQ1Dw/fEE8DhSJVIVfRyAkgO6S/V/jbHpls4MSRSMxkoo:4zW5ygDwnEZIYkjgWjblMSRSMqH
MD5 SHA1 SHA512 SSDEEP

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memory/2376-133-0x0000000000400000-0x000000000043D000-memory.dmp

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memory/2376-134-0x0000000060900000-0x0000000060992000-memory.dmp

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memory/2376-196-0x0000000000400000-0x000000000043D000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads