marsstealer | b528e70d97a3633d06626303bbf03d1544fdd659169594c61a47aa825237f847

Analysis

max time kernel
138s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28-12-2023 01:39

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General

Target

d183838c3849c3cfcb873bf79de6dd6bc2cf7de60a2c18059d97eaeb1d5c2edd.exe
Size

11.7MB
MD5

6c23d52006da52904f755c8268d29ffc
SHA1

8d770ad326a02692e7a223749128d402af94e1a7
SHA256

d183838c3849c3cfcb873bf79de6dd6bc2cf7de60a2c18059d97eaeb1d5c2edd
SHA512

ae64700be9120d3b4e8b1dc0a94ad4131726d72bd92433461e2af505df67e89bf1e3d62d1b47dd6b632dc087dcea5d15ddcad03fa3956379efc854d0d72bd9b3
SSDEEP

12288:Fkbo4c5w0lRq+x83dhmNml3pPw1WIzWTbel9BfrmjsN/pf7Rm:3gqbsmVBfyoN/y

Score

10^/10

marsstealer default spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

www.moscow-post.ru/bark/wpadmin/admin.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

Processes:

d183838c3849c3cfcb873bf79de6dd6bc2cf7de60a2c18059d97eaeb1d5c2edd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	d183838c3849c3cfcb873bf79de6dd6bc2cf7de60a2c18059d97eaeb1d5c2edd.exe

Executes dropped EXE 1 IoCs

Processes:

K1A92.exe

pid process

3484 K1A92.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

Processes:

WerFault.exe

pid pid_target process target process

1184 3484 WerFault.exe K1A92.exe

pid	process
3484	K1A92.exe

pid	pid_target	process	target process
1184	3484	WerFault.exe	K1A92.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

d183838c3849c3cfcb873bf79de6dd6bc2cf7de60a2c18059d97eaeb1d5c2edd.exe

description	pid	process	target process
PID 1856 wrote to memory of 3484	1856	d183838c3849c3cfcb873bf79de6dd6bc2cf7de60a2c18059d97eaeb1d5c2edd.exe	K1A92.exe
PID 1856 wrote to memory of 3484	1856	d183838c3849c3cfcb873bf79de6dd6bc2cf7de60a2c18059d97eaeb1d5c2edd.exe	K1A92.exe
PID 1856 wrote to memory of 3484	1856	d183838c3849c3cfcb873bf79de6dd6bc2cf7de60a2c18059d97eaeb1d5c2edd.exe	K1A92.exe

C:\Users\Admin\AppData\Local\Temp\d183838c3849c3cfcb873bf79de6dd6bc2cf7de60a2c18059d97eaeb1d5c2edd.exe
"C:\Users\Admin\AppData\Local\Temp\d183838c3849c3cfcb873bf79de6dd6bc2cf7de60a2c18059d97eaeb1d5c2edd.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1856

C:\ProgramData\K1A92.exe
"C:\ProgramData\K1A92.exe"
2⤵
- Executes dropped EXE
PID:3484

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3484 -s 1368
3⤵
- Program crash
PID:1184

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 176 -p 3484 -ip 3484
1⤵
PID:1012

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\ProgramData\K1A92.exe
Filesize
159KB

MD5
e639201bf0d332f8965649ec7de96c40

SHA1
6047898d098c27c9e24e9e21310ecd2fd6a7dc20

SHA256
fcecfe186349fb25b733b526b9259dec1bd3a3bd94a7cd5015a3b890e371f7fb

SHA512
73d010ce917f0827bb1266a1178c026aa6602675788163c38dd9d46ce9f558b855c2ad5bfd70db84e8b58deb241c64050f2dc472c532dbd2453155e569a24b45

Download Submit
memory/1856-0-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/1856-1-0x0000000000BF0000-0x0000000000C9A000-memory.dmp

Filesize
680KB

Download
memory/1856-2-0x00000000055C0000-0x00000000055D0000-memory.dmp

Filesize
64KB

Download
memory/1856-3-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/1856-9-0x00000000055C0000-0x00000000055D0000-memory.dmp

Filesize
64KB

Download
memory/1856-15-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/3484-13-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/3484-17-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download