marsstealer | b1e62cecdf705a662dc9638e12d238378e2775d75b3aa63a01552dee8d5da346

General

Target

Builded.exe
Size

159KB
MD5

dd91fd8e2acbff3a3af96b83dce88775
SHA1

2a0d1559fd52c1bc5685349bdc75399031c472d1
SHA256

b1e62cecdf705a662dc9638e12d238378e2775d75b3aa63a01552dee8d5da346
SHA512

65469383f280f8c9e0a47724714754ec11ad3898bc3e3bd0072ee5fdb3d940741392d21df56e6f960b6e3d13ea86b4695653a3e9a476bfb40dd08263c17acf2b
SSDEEP

3072:U5MAV02Ri1/QlWJb317O5q1nC9zuUJ4MhjjwrXVNov5JSp8Bb8EG:MMAV02Y16ibVEq44UJ4BTVNo98EG

Score

10^/10

marsstealer default discovery spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

C2

54.159.203.55/Nihuya.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-1-5-21-2372564722-193526734-2636556182-1000\Control Panel\International\Geo\Nation	Builded.exe

Loads dropped DLL 2 IoCs

pid	Process
3644	Builded.exe
3644	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
1888	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3644 wrote to memory of 2964	3644	Builded.exe	100
PID 3644 wrote to memory of 2964	3644	Builded.exe	100
PID 3644 wrote to memory of 2964	3644	Builded.exe	100
PID 2964 wrote to memory of 1888	2964	cmd.exe	102
PID 2964 wrote to memory of 1888	2964	cmd.exe	102
PID 2964 wrote to memory of 1888	2964	cmd.exe	102

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:3644
- 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:2964
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1888

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
C:\ProgramData\nss3.dll

Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
memory/3644-130-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/3644-131-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/3644-132-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/3644-154-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads