marsstealer | 319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39

General

Target
319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe
Size 159KB
Sample240320-clf83seb87
SHA256 319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39
MD5 538cc587125f738ae81e2e4fe28c0084
SHA1 7aa3c65496b968c3641b7d7db1849ad4715053d6
SHA512 770eafcaa7ede802b61d6483fad9a4eff6161867c5d7f78b4ee2dfd01002425b56c09c52dea495b3b43b80f6ecfb966dedf79a08e0316f018b1cde929524bf2b
SSDEEP 3072:UP2iydi+7Jtzet46rSIskyH39vIe3EZ8CbsZEE6tLJSp8Bb8EG:edIfzetJFyXRlCbeV6tH8EG
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

marsstealer default discovery spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

C2

couriercare.in/18/gate.php

Signatures

Mars Stealer
An infostealer written in C++ based on other infostealers.
stealer marsstealer
Downloads MZ/PE file

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe

Loads dropped DLL 2 IoCs

pid	Process
1716	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe
1716	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.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
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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4120	timeout.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_Classes\Local Settings	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe
Key created	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe
Key created	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1716 wrote to memory of 2388	1716	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe	110
PID 1716 wrote to memory of 2388	1716	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe	110
PID 1716 wrote to memory of 2388	1716	319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe	110
PID 2388 wrote to memory of 4120	2388	cmd.exe	112
PID 2388 wrote to memory of 4120	2388	cmd.exe	112
PID 2388 wrote to memory of 4120	2388	cmd.exe	112

C:\Users\Admin\AppData\Local\Temp\319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe
"C:\Users\Admin\AppData\Local\Temp\319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1716
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\319b8b4f833b7a319dae6c6ff148d0ec75f83ac6f031678a54ab31a5ab360c39.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2388
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:4120

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4396 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
1⤵
PID:5104

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1652

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

mozglue.dll

Path C:\ProgramData\mozglue.dll
Size 31KB
SHA256 17a7c2e8df8ebb9db0ecdb0c1cf0301dbeb7aa5104cd1a75ec8232ae4e3d2387
MD5 64565ee40b0fd72559882a1ff3c33af2
SHA1 a6f775d4d50e10e17a64d886da71527eb91a88b8
SHA512 6861a56a1f857eb9fcf65e4cea3a6d92f625cfccff99bf9c770dd712a00d40af4d3b39c57822a8d948de7eec3e5b61dae59c59db1bf5c21057d580a3c17d495d
SSDEEP 768:7qKlvh2RA7zjib/UbO2hEoqOgnDGT9mZdbFDcwOU6gnP8d:7heRyzeb/UbO2W0m53pP8d
MD5 SHA1 SHA512 SSDEEP

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nss3.dll

Path C:\ProgramData\nss3.dll
Size 132KB
SHA256 15861a2832e0727eb71f8cf825de96690f1f8358e6a77914b3d1e348d516d7ea
MD5 afd9f178965659e68195a131201f9e48
SHA1 b76c85a05cbc9eec8ed82d54f324f05f28d203ce
SHA512 1610dbb263b9eb8753b992c7457981acc2b2013725118be659f8b8fc60834c5946c676d727903852f03bd4edcaae7a2ac581c7ee1f0e4657d10ce6105c1d4009
SSDEEP 3072:bO3tVUITOE+ZBTm2S2cYqWUVvtbhm/mlTzpYHPga2YtwxuBAC/2Fx86oelSA:UABzd8Vvtb2w9ZzuP2X8BeUA
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1716-0-0x0000000000400000-0x000000000043D000-memory.dmp

Download

memory/1716-1-0x0000000060900000-0x0000000060992000-memory.dmp

Download

memory/1716-64-0x0000000000400000-0x000000000043D000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads