marsstealer | 2321c97ec6ac02f588357ad3d72df237f3042054f603851587c59eaef5ceb13c

General

Target
m0wsoI3.exe
Size 159KB
Sample250317-pgvbcszsft
SHA256 2321c97ec6ac02f588357ad3d72df237f3042054f603851587c59eaef5ceb13c
MD5 599e5d1eea684ef40fc206f71b5d4643
SHA1 5111931bba3c960d14b44871950c62249aeefff7
SHA512 842149b31140a4f42597e016ecb8cb22f8e98919ac5e5cc646543fce78e021a022c1a67376856251463a342b51d7d8a16322b1b90bc817e76952e8bb08df0ac0
SSDEEP 3072:UjXEYZz5R/aCt5EwQvIlrycM7HNQoHPK9gsrk3rFXjo5JSp8Bb8EG:i/2Ct5EwQvIl9M7nHPK9dSc8EG
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

marsstealer default discovery spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

C2

ctrlgem.xyz/gate.php

Signatures

Mars Stealer
An infostealer written in C++ based on other infostealers.
stealer marsstealer
Marsstealer family
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-1-5-21-308834014-1004923324-1191300197-1000\Control Panel\International\Geo\Nation	m0wsoI3.exe

Loads dropped DLL 2 IoCs

pid	Process
4788	m0wsoI3.exe
4788	m0wsoI3.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003
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
Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	m0wsoI3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

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	m0wsoI3.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	m0wsoI3.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4516	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4788 wrote to memory of 4284	4788	m0wsoI3.exe	87
PID 4788 wrote to memory of 4284	4788	m0wsoI3.exe	87
PID 4788 wrote to memory of 4284	4788	m0wsoI3.exe	87
PID 4284 wrote to memory of 4516	4284	cmd.exe	89
PID 4284 wrote to memory of 4516	4284	cmd.exe	89
PID 4284 wrote to memory of 4516	4284	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\m0wsoI3.exe
"C:\Users\Admin\AppData\Local\Temp\m0wsoI3.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:4788
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\m0wsoI3.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4284
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4516

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Browser Information Discovery

Query Registry

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

2

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/4788-0-0x0000000000400000-0x000000000043D000-memory.dmp

Download

memory/4788-1-0x0000000060900000-0x0000000060992000-memory.dmp

Download

memory/4788-66-0x0000000000400000-0x000000000043D000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads