marsstealer | a238bd522702802eb2a2b71b4b00a1a1553b1c2fff0d8b9e50b13e999cabbdf3

Analysis

max time kernel
0s
max time network
134s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2023 02:10

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General

Target

YoudaoDict.exe
Size

6.8MB
MD5

ff3d9c5dcde804a90e862de9c1d32a8c
SHA1

04b0da40346d661a11e9e899daec104ee77c6606
SHA256

a238bd522702802eb2a2b71b4b00a1a1553b1c2fff0d8b9e50b13e999cabbdf3
SHA512

288e716dd70bedd1cebdc7582f44d969050de9ffe387ae0b9363937fc41b62eedb1faba1fd0cead9a05ba96a880df4d00727e60cde2606a16849e8a5cf266ac3
SSDEEP

12288:IPvAXg30gk3yrkb+/nCSnilwUOSFaoAiTI2MHPwrQKUs6:IgpbOROQ3s6

Score

10^/10

marsstealer default stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

www.moscow-post.ru/ryuka/grocktack/fdzeiw.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:

YoudaoDict.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	YoudaoDict.exe

Executes dropped EXE 1 IoCs

Processes:

DIKKC5OC.exe

pid process

1440 DIKKC5OC.exe
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

2980 1440 WerFault.exe DIKKC5OC.exe

pid	process
1440	DIKKC5OC.exe

pid	pid_target	process	target process
2980	1440	WerFault.exe	DIKKC5OC.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

YoudaoDict.exe

description	pid	process	target process
PID 3052 wrote to memory of 1440	3052	YoudaoDict.exe	DIKKC5OC.exe
PID 3052 wrote to memory of 1440	3052	YoudaoDict.exe	DIKKC5OC.exe
PID 3052 wrote to memory of 1440	3052	YoudaoDict.exe	DIKKC5OC.exe

C:\Users\Admin\AppData\Local\Temp\YoudaoDict.exe
"C:\Users\Admin\AppData\Local\Temp\YoudaoDict.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3052

C:\ProgramData\DIKKC5OC.exe
"C:\ProgramData\DIKKC5OC.exe"
2⤵
- Executes dropped EXE
PID:1440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1440 -s 1400
3⤵
- Program crash
PID:2980

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1440 -ip 1440
1⤵
PID:2604

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\ProgramData\DIKKC5OC.exe
Filesize
159KB

MD5
355142538822114c3357d73d35769ff2

SHA1
85d6d7b919f60c39cc8a3d65bf574877c3a7590f

SHA256
4dc9b6823e021a19ff259c5f0fcc2a023b0dea26adde9e08f1278ba103fdd3cc

SHA512
9099f85fe484df4678e106373630427b8578d73bcea1bf7ba81eb9be4578d607acc50fa1ba97bd063edc1ed9bb27328552aabf2ca3dc0837841f348ceb7689e4

Download Submit
C:\ProgramData\DIKKC5OC.exe
Filesize
107KB

MD5
578206cd1b1b036cb116a1dcdd798e10

SHA1
bb351bfe9c103a9083f35e63ce56fc5f7e0491c5

SHA256
9348cc2a03eb994a614cf5bb0b4160ca86deb2ca0168267a01de2edeb96ed7ec

SHA512
de2eeb14ce406ac668070687e785dfe154379da30f91295fe22e43abc7e7552ca6a0da48d6436c7abf772165b4d5ce71893548fe7e1b36fd917342374d7bcfbd

Download Submit
memory/1440-11-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1440-14-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/3052-1-0x0000000074920000-0x00000000750D0000-memory.dmp

Filesize
7.7MB

Download
memory/3052-0-0x0000000000480000-0x0000000000508000-memory.dmp

Filesize
544KB

Download
memory/3052-12-0x0000000074920000-0x00000000750D0000-memory.dmp

Filesize
7.7MB

Download