marsstealer | 6a0b98e152b8f618d9c6d82ed37034cc0b87404fcbec9fb8edf6b6847f7f75a0

Analysis

max time kernel
122s
max time network
124s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
03-01-2024 14:45

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General

Target

791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe
Size

13.4MB
MD5

6e08d023664e3f4e835ec3ec198b883a
SHA1

43f2f3321a51f1ca308af891d2e1dbaaee48b045
SHA256

791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad
SHA512

41d44ed76ecda43eab891a2e07cb43481478c39797e44ed017654a8bca346b90bfcf4f444532d8e9765173c2e9b26d5f524fe42ec9a7830230fedbe21f9e0ec1
SSDEEP

12288:bu5DqC9/n1D0jAV8eCeoIl1TroJMExsi+vakV7tbQ3KtwU:buDXVsUThTFyJm

Score

10^/10

marsstealer default spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
2384	41AKTQO.exe

Loads dropped DLL 5 IoCs

pid	Process
1388	791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe
1388	791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe
2456	WerFault.exe
2456	WerFault.exe
2456	WerFault.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
T1552.001
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2456	2384	WerFault.exe	28

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1388 wrote to memory of 2384	1388	791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe	28
PID 1388 wrote to memory of 2384	1388	791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe	28
PID 1388 wrote to memory of 2384	1388	791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe	28
PID 1388 wrote to memory of 2384	1388	791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe	28
PID 2384 wrote to memory of 2456	2384	41AKTQO.exe	31
PID 2384 wrote to memory of 2456	2384	41AKTQO.exe	31
PID 2384 wrote to memory of 2456	2384	41AKTQO.exe	31
PID 2384 wrote to memory of 2456	2384	41AKTQO.exe	31

C:\Users\Admin\AppData\Local\Temp\791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe
"C:\Users\Admin\AppData\Local\Temp\791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1388
- C:\Users\Admin\AppData\Local\Temp\Microsoft Visual C++ 2010 x64 Redistributable Setup_10.0.40219\41AKTQO.exe
  "C:\Users\Admin\AppData\Local\Temp\Microsoft Visual C++ 2010 x64 Redistributable Setup_10.0.40219\41AKTQO.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2384
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2384 -s 808
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2456

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

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\Microsoft Visual C++ 2010 x64 Redistributable Setup_10.0.40219\41AKTQO.exe

Filesize
159KB

MD5
a103174262d8c3fd501ffb95323c60b1

SHA1
e40f0dd566ba3d50886d3f9e82bf2c108370d62b

SHA256
bc65e75fcfee4ff9655005f8496f7c86feb892f0caec33c2208e8381cb967248

SHA512
a023dd3997474d427d963a23ccbe7091fdda53d8fde1e1c43eb2e67090a27bd1b0f9eee08757993125cfe10683c38ab0db2194a5847ff51e39d636357c381da2

Download Submit
memory/1388-0-0x00000000010E0000-0x0000000001162000-memory.dmp

Filesize
520KB

Download
memory/1388-1-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1388-2-0x0000000000DF0000-0x0000000000E30000-memory.dmp

Filesize
256KB

Download
memory/1388-14-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1388-11-0x0000000000C20000-0x0000000000C5D000-memory.dmp

Filesize
244KB

Download
memory/2384-13-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download