marsstealer | 9d15283240ff79899aeb0f2866c51b75d953e5c04a8069397734a3cb6aef87af

Analysis

max time kernel
92s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2023 04:02

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General

Target

The Summer Waifu.exe
Size

5.7MB
MD5

efe42e097392ba07bdbc1b30ed12f46f
SHA1

6e67c0ce64661b8f12c453d182fadcf9b81225b8
SHA256

9d15283240ff79899aeb0f2866c51b75d953e5c04a8069397734a3cb6aef87af
SHA512

87147c5b0a5016d5a6f36e980cf294880a78ca3b3491ca1e90bd5664f3d6405da4259ae486544f7b355cf6e29eeb80273336b9f2fbb5928730eda3584b8a1005
SSDEEP

12288:MPZV/cS4H8+Gc8DWKwJa8JdrBoyvCRH96m2iii2Tc:MRV2iWih

Score

10^/10

marsstealer default spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

moscow-post.com/log/loger.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:

The Summer Waifu.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	The Summer Waifu.exe

Executes dropped EXE 1 IoCs

Processes:

U54.exe

pid process

2248 U54.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

640 2248 WerFault.exe U54.exe

pid	process
2248	U54.exe

pid	pid_target	process	target process
640	2248	WerFault.exe	U54.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

The Summer Waifu.exe

description	pid	process	target process
PID 4956 wrote to memory of 2248	4956	The Summer Waifu.exe	U54.exe
PID 4956 wrote to memory of 2248	4956	The Summer Waifu.exe	U54.exe
PID 4956 wrote to memory of 2248	4956	The Summer Waifu.exe	U54.exe

C:\Users\Admin\AppData\Local\Temp\The Summer Waifu.exe
"C:\Users\Admin\AppData\Local\Temp\The Summer Waifu.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4956

C:\Users\Admin\AppData\Roaming\Adobe\U54.exe
"C:\Users\Admin\AppData\Roaming\Adobe\U54.exe"
2⤵
- Executes dropped EXE
PID:2248

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2248 -s 1216
3⤵
- Program crash
PID:640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2248 -ip 2248
1⤵
PID:3240

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\U54.exe
Filesize
159KB

MD5
ccbede8d2869535347316a479f0b8095

SHA1
1dd0e7574972260c77ca90638950d83c7b00d8f2

SHA256
afae663cab910a67e7fb519797ff385926b77ee59fa0e96e1853318146d2e179

SHA512
9a0de846ced51215948a16300aec8aeb7cf0ef5c0005a3cb661fc27e85b5d25b3b3278e7c91fbedc9d0a1ec686fdcd8ff07f35b39931a7c28c8b2139dabf4456

Download Submit
memory/2248-12-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/2248-15-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/4956-0-0x0000000000390000-0x0000000000404000-memory.dmp

Filesize
464KB

Download
memory/4956-1-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/4956-2-0x0000000004F40000-0x0000000004F50000-memory.dmp

Filesize
64KB

Download
memory/4956-13-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download