marsstealer | 26d1a7f43e36efda53ec80f7914ecf5cf210eaad47d767c7c8b2dfe8fecf8301

General

Target

Cyber Hunter Install.exe
Size

4.9MB
MD5

f836f277cbcadfecfc988bf350d410c3
SHA1

f9a66d7876a6eb09763e0705beaa999d99f53754
SHA256

d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838
SHA512

ac284e90bf72d564ceaeda28383efc8793f286002d2d7ae37f08f05a9170faa5f77a8e741cb60fabb1f48f9abc769070fc3620fa9c5d7dfce60029b6d58c8280
SSDEEP

12288:D6BeSpuojQEv1E729k4nRQ/ceb5WdWOeoP3/F+2nGr6A5zuzhGlC5LcB+cVgeMtb:E0yLW2mudcocIE

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

Processes:

1U203L20.exe

pid process

1920 1U203L20.exe

pid	process
1920	1U203L20.exe

Loads dropped DLL 8 IoCs

Processes:

Cyber Hunter Install.exe1U203L20.exeWerFault.exe

pid	process
1752	Cyber Hunter Install.exe
1752	Cyber Hunter Install.exe
1920	1U203L20.exe
1920	1U203L20.exe
1920	1U203L20.exe
2664	WerFault.exe
2664	WerFault.exe
2664	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

Processes:

WerFault.exe

pid pid_target process target process

2664 1920 WerFault.exe 1U203L20.exe

pid	pid_target	process	target process
2664	1920	WerFault.exe	1U203L20.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

Cyber Hunter Install.exe1U203L20.exe

description	pid	process	target process
PID 1752 wrote to memory of 1920	1752	Cyber Hunter Install.exe	1U203L20.exe
PID 1752 wrote to memory of 1920	1752	Cyber Hunter Install.exe	1U203L20.exe
PID 1752 wrote to memory of 1920	1752	Cyber Hunter Install.exe	1U203L20.exe
PID 1752 wrote to memory of 1920	1752	Cyber Hunter Install.exe	1U203L20.exe
PID 1752 wrote to memory of 1920	1752	Cyber Hunter Install.exe	1U203L20.exe
PID 1752 wrote to memory of 1920	1752	Cyber Hunter Install.exe	1U203L20.exe
PID 1752 wrote to memory of 1920	1752	Cyber Hunter Install.exe	1U203L20.exe
PID 1920 wrote to memory of 2664	1920	1U203L20.exe	WerFault.exe
PID 1920 wrote to memory of 2664	1920	1U203L20.exe	WerFault.exe
PID 1920 wrote to memory of 2664	1920	1U203L20.exe	WerFault.exe
PID 1920 wrote to memory of 2664	1920	1U203L20.exe	WerFault.exe
PID 1920 wrote to memory of 2664	1920	1U203L20.exe	WerFault.exe
PID 1920 wrote to memory of 2664	1920	1U203L20.exe	WerFault.exe
PID 1920 wrote to memory of 2664	1920	1U203L20.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\Cyber Hunter Install.exe
"C:\Users\Admin\AppData\Local\Temp\Cyber Hunter Install.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1752

C:\Users\Admin\AppData\Local\Temp\mozilla-temp-files\1U203L20.exe
"C:\Users\Admin\AppData\Local\Temp\mozilla-temp-files\1U203L20.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1920

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1920 -s 720
3⤵
- Loads dropped DLL
- Program crash
PID:2664

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\mozilla-temp-files\1U203L20.exe
Filesize
8KB

MD5
b61ad31f9f545a17a27915e300bde71d

SHA1
c30bfed3f6594d54d6b2b7f5de37821272c0f9c8

SHA256
e963b944b1f29d0bfd8e9acf872ca2324a64588765eab116adcb516e01b62a29

SHA512
df1e641336fbffcb73d29c8215309fe09f5bd531d8d934ca814ddfac71f3ed261778918e548f1efb5e4cbe973a2796d7771ded6a116435e173a7a418b504d826

Download Submit
\Users\Admin\AppData\Local\Temp\mozilla-temp-files\1U203L20.exe
Filesize
4KB

MD5
60171dc6d5c1f09e40f6473bb7a2e394

SHA1
068d69e47a1b789373cff2c3650f90c297118292

SHA256
ba1d2e780faaeb1b52d3227664bc98be3e624ea7c36bd9a5c4ed79eba20a6b55

SHA512
5108ed9a3ebf4dd30d3f54e3a9cf39fb5e3f2dc817ee56b89cbaaee6f7777b6d218fcb4949a0f32500851502fc6363044f5186600e0820d29e6f0318e6165fdb

Download Submit
\Users\Admin\AppData\Local\Temp\mozilla-temp-files\1U203L20.exe
Filesize
159KB

MD5
1f51c4bdd8bd5b81fe2638ffa85fd5d2

SHA1
43146ce6867ba788dc50ddfe1d9ec4d89aafd859

SHA256
e7dcfe91d1f3c1b1d33b8f7eae174999b04faec7825474baf846aaa408d97c38

SHA512
7f0d34c1ccf39cb0c5600507b2b00185e097a6423cc622b66659cd46aef6bb55b6a5806971a816eab3f990b8099cdc9a606cacab49a1f6bd002fcf9a2964ca98

Download Submit
memory/1752-0-0x00000000011B0000-0x0000000001242000-memory.dmp

Filesize
584KB

Download
memory/1752-10-0x0000000000A40000-0x0000000000A7D000-memory.dmp

Filesize
244KB

Download
memory/1752-5-0x0000000000A40000-0x0000000000A7D000-memory.dmp

Filesize
244KB

Download
memory/1920-16-0x0000000000830000-0x000000000086D000-memory.dmp

Filesize
244KB

Download
memory/1920-19-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1920-18-0x0000000000830000-0x000000000086D000-memory.dmp

Filesize
244KB

Download
memory/1920-17-0x0000000000830000-0x000000000086D000-memory.dmp

Filesize
244KB

Download

Analysis

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