marsstealer | 2321c97ec6ac02f588357ad3d72df237f3042054f603851587c59eaef5ceb13c

General

Target

m0wsoI3.exe
Size

159KB
MD5

599e5d1eea684ef40fc206f71b5d4643
SHA1

5111931bba3c960d14b44871950c62249aeefff7
SHA256

2321c97ec6ac02f588357ad3d72df237f3042054f603851587c59eaef5ceb13c
SHA512

842149b31140a4f42597e016ecb8cb22f8e98919ac5e5cc646543fce78e021a022c1a67376856251463a342b51d7d8a16322b1b90bc817e76952e8bb08df0ac0
SSDEEP

3072:UjXEYZz5R/aCt5EwQvIlrycM7HNQoHPK9gsrk3rFXjo5JSp8Bb8EG:i/2Ct5EwQvIl9M7nHPK9dSc8EG

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

Deletes itself 1 IoCs

pid	Process
2600	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1404	m0wsoI3.exe
1404	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	m0wsoI3.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	m0wsoI3.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2564	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1404 wrote to memory of 2600	1404	m0wsoI3.exe	32
PID 1404 wrote to memory of 2600	1404	m0wsoI3.exe	32
PID 1404 wrote to memory of 2600	1404	m0wsoI3.exe	32
PID 1404 wrote to memory of 2600	1404	m0wsoI3.exe	32
PID 2600 wrote to memory of 2564	2600	cmd.exe	34
PID 2600 wrote to memory of 2564	2600	cmd.exe	34
PID 2600 wrote to memory of 2564	2600	cmd.exe	34
PID 2600 wrote to memory of 2564	2600	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\m0wsoI3.exe
"C:\Users\Admin\AppData\Local\Temp\m0wsoI3.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1404
- 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⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2600
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2564

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

2

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

Replay Monitor

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Downloads

\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\nss3.dll

Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
memory/1404-0-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1404-1-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/1404-46-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download

Analysis

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