marsstealer | 8faff89242e941f569ee0852ba3463f26741d68b22627d11555b6cee5ef27676

General

Target

processlassosetup64.exe
Size

4.9MB
MD5

611e8af3116aa80fafc76d0501fd172e
SHA1

0a82193d9485da25f424c6ff28bdde597fe023a6
SHA256

8faff89242e941f569ee0852ba3463f26741d68b22627d11555b6cee5ef27676
SHA512

1ad6fa695b89e9436c3953609337adfa01f6436e3714bc9268c2a3252fb967d9916c121c611f7416d5fe265a46f5fe891f07d02a02d27a8d6664a2fc0705acb3
SSDEEP

6144:1Ss9IYGOxz2RRKOOCxU873xCswRnBOGLeQ5dBRRW6n5FkjdfJauy:t9/X12qOOCxj3x5whwQl2lauy

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
2752	IH3A1EL99CR2M.exe

Loads dropped DLL 8 IoCs

pid	Process
2144	processlassosetup64.exe
2144	processlassosetup64.exe
2752	IH3A1EL99CR2M.exe
2752	IH3A1EL99CR2M.exe
2752	IH3A1EL99CR2M.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	2752	WerFault.exe	28

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	IH3A1EL99CR2M.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 0400000001000000100000000cd2f9e0da1773e9ed864da5e370e74e14000000010000001400000079b459e67bb6e5e40173800888c81a58f6e99b6e030000000100000014000000cabd2a79a1076a31f21d253635cb039d4329a5e80f00000001000000200000003f0411ede9c4477057d57e57883b1f205b20cdc0f3263129b1ee0269a2678f631900000001000000100000002fe1f70bb05d7c92335bc5e05b984da620000000010000006f0500003082056b30820353a0030201020211008210cfb0d240e3594463e0bb63828b00300d06092a864886f70d01010b0500304f310b300906035504061302555331293027060355040a1320496e7465726e65742053656375726974792052657365617263682047726f7570311530130603550403130c4953524720526f6f74205831301e170d3135303630343131303433385a170d3335303630343131303433385a304f310b300906035504061302555331293027060355040a1320496e7465726e65742053656375726974792052657365617263682047726f7570311530130603550403130c4953524720526f6f7420583130820222300d06092a864886f70d01010105000382020f003082020a0282020100ade82473f41437f39b9e2b57281c87bedcb7df38908c6e3ce657a078f775c2a2fef56a6ef6004f28dbde68866c4493b6b163fd14126bbf1fd2ea319b217ed1333cba48f5dd79dfb3b8ff12f1219a4bc18a8671694a66666c8f7e3c70bfad292206f3e4c0e680aee24b8fb7997e94039fd347977c99482353e838ae4f0a6f832ed149578c8074b6da2fd0388d7b0370211b75f2303cfa8faeddda63abeb164fc28e114b7ecf0be8ffb5772ef4b27b4ae04c12250c708d0329a0e15324ec13d9ee19bf10b34a8c3f89a36151deac870794f46371ec2ee26f5b9881e1895c34796c76ef3b906279e6dba49a2f26c5d010e10eded9108e16fbb7f7a8f7c7e50207988f360895e7e237960d36759efb0e72b11d9bbc03f94905d881dd05b42ad641e9ac0176950a0fd8dfd5bd121f352f28176cd298c1a80964776e4737baceac595e689d7f72d689c50641293e593edd26f524c911a75aa34c401f46a199b5a73a516e863b9e7d72a712057859ed3e5178150b038f8dd02f05b23e7b4a1c4b730512fcc6eae050137c439374b3ca74e78e1f0108d030d45b7136b407bac130305c48b7823b98a67d608aa2a32982ccbabd83041ba2830341a1d605f11bc2b6f0a87c863b46a8482a88dc769a76bf1f6aa53d198feb38f364dec82b0d0a28fff7dbe21542d422d0275de179fe18e77088ad4ee6d98b3ac6dd27516effbc64f533434f0203010001a3423040300e0603551d0f0101ff040403020106300f0603551d130101ff040530030101ff301d0603551d0e0416041479b459e67bb6e5e40173800888c81a58f6e99b6e300d06092a864886f70d01010b05000382020100551f58a9bcb2a850d00cb1d81a6920272908ac61755c8a6ef882e5692fd5f6564bb9b8731059d321977ee74c71fbb2d260ad39a80bea17215685f1500e59ebcee059e9bac915ef869d8f8480f6e4e99190dc179b621b45f06695d27c6fc2ea3bef1fcfcbd6ae27f1a9b0c8aefd7d7e9afa2204ebffd97fea912b22b1170e8ff28a345b58d8fc01c954b9b826cc8a8833894c2d843c82dfee965705ba2cbbf7c4b7c74e3b82be31c822737392d1c280a43939103323824c3c9f86b255981dbe29868c229b9ee26b3b573a82704ddc09c789cb0a074d6ce85d8ec9efceabc7bbb52b4e45d64ad026cce572ca086aa595e315a1f7a4edc92c5fa5fbffac28022ebed77bbbe3717b9016d3075e46537c3707428cd3c4969cd599b52ae0951a8048ae4c3907cecc47a452952bbab8fbadd233537de51d4d6dd5a1b1c7426fe64027355ca328b7078de78d3390e7239ffb509c796c46d5b415b3966e7e9b0c963ab8522d3fd65be1fb08c284fe24a8a389daac6ae1182ab1a843615bd31fdc3b8d76f22de88d75df17336c3d53fb7bcb415fffdca2d06138e196b8ac5d8b37d775d533c09911ae9d41c1727584be0241425f67244894d19b27be073fb9b84f817451e17ab7ed9d23e2bee0d52804133c31039edd7a6c8fc60718c67fde478e3f289e0406cfa5543477bdec899be91743df5bdb5ffe8e1e57a2cd409d7e6222dade1827	IH3A1EL99CR2M.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2144 wrote to memory of 2752	2144	processlassosetup64.exe	28
PID 2144 wrote to memory of 2752	2144	processlassosetup64.exe	28
PID 2144 wrote to memory of 2752	2144	processlassosetup64.exe	28
PID 2144 wrote to memory of 2752	2144	processlassosetup64.exe	28
PID 2144 wrote to memory of 2752	2144	processlassosetup64.exe	28
PID 2144 wrote to memory of 2752	2144	processlassosetup64.exe	28
PID 2144 wrote to memory of 2752	2144	processlassosetup64.exe	28
PID 2752 wrote to memory of 2456	2752	IH3A1EL99CR2M.exe	31
PID 2752 wrote to memory of 2456	2752	IH3A1EL99CR2M.exe	31
PID 2752 wrote to memory of 2456	2752	IH3A1EL99CR2M.exe	31
PID 2752 wrote to memory of 2456	2752	IH3A1EL99CR2M.exe	31
PID 2752 wrote to memory of 2456	2752	IH3A1EL99CR2M.exe	31
PID 2752 wrote to memory of 2456	2752	IH3A1EL99CR2M.exe	31
PID 2752 wrote to memory of 2456	2752	IH3A1EL99CR2M.exe	31

C:\Users\Admin\AppData\Local\Temp\processlassosetup64.exe
"C:\Users\Admin\AppData\Local\Temp\processlassosetup64.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2144
- C:\ProgramData\IH3A1EL99CR2M.exe
  "C:\ProgramData\IH3A1EL99CR2M.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Modifies system certificate store
  - Suspicious use of WriteProcessMemory
  PID:2752
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2752 -s 728
    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

Modify Registry

1

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\IH3A1EL99CR2M.exe

Filesize
159KB

MD5
3cc6ddf90e7492c803b3d20142b126cc

SHA1
9899b9c40227e604131018ca2f812edf2ef5a32b

SHA256
49ab6b67e5bc75c556a1a8248f318943bc697209fdac3f02f2721ded1a375897

SHA512
df8e9bb2c77ca4b3d7d22fb10adf4a93f23442d1712f5afad9df2b073bd4d95fb2c658844d6d30b86a79bccd44b4dcd491bd7a5a98b78797cd72c8c704ab0ec8

Download Submit
memory/2144-0-0x0000000000900000-0x000000000099E000-memory.dmp

Filesize
632KB

Download
memory/2144-10-0x0000000000620000-0x000000000065D000-memory.dmp

Filesize
244KB

Download
memory/2144-15-0x0000000000620000-0x000000000065D000-memory.dmp

Filesize
244KB

Download
memory/2752-16-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/2752-17-0x00000000001C0000-0x00000000001FD000-memory.dmp

Filesize
244KB

Download
memory/2752-18-0x00000000001C0000-0x00000000001FD000-memory.dmp

Filesize
244KB

Download

Analysis

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