marsstealer | 6a0b98e152b8f618d9c6d82ed37034cc0b87404fcbec9fb8edf6b6847f7f75a0

General

Target

791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe
Size

13.4MB
MD5

6e08d023664e3f4e835ec3ec198b883a
SHA1

43f2f3321a51f1ca308af891d2e1dbaaee48b045
SHA256

791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad
SHA512

41d44ed76ecda43eab891a2e07cb43481478c39797e44ed017654a8bca346b90bfcf4f444532d8e9765173c2e9b26d5f524fe42ec9a7830230fedbe21f9e0ec1
SSDEEP

12288:bu5DqC9/n1D0jAV8eCeoIl1TroJMExsi+vakV7tbQ3KtwU:buDXVsUThTFyJm

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

pid	Process
2704	WM9.exe

Loads dropped DLL 5 IoCs

pid	Process
1692	791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe
1692	791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe
2344	WerFault.exe
2344	WerFault.exe
2344	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

pid	pid_target	Process	procid_target
2344	2704	WerFault.exe	28

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1692 wrote to memory of 2704	1692	791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe	28
PID 1692 wrote to memory of 2704	1692	791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe	28
PID 1692 wrote to memory of 2704	1692	791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe	28
PID 1692 wrote to memory of 2704	1692	791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe	28
PID 2704 wrote to memory of 2344	2704	WM9.exe	31
PID 2704 wrote to memory of 2344	2704	WM9.exe	31
PID 2704 wrote to memory of 2344	2704	WM9.exe	31
PID 2704 wrote to memory of 2344	2704	WM9.exe	31

C:\Users\Admin\AppData\Local\Temp\791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe
"C:\Users\Admin\AppData\Local\Temp\791cb146ce71d27b52dd233a80f5ac4e63f69d49af07a53850954da93ff439ad.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1692
- C:\Users\Admin\AppData\Roaming\Identities\WM9.exe
  "C:\Users\Admin\AppData\Roaming\Identities\WM9.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2704
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2704 -s 640
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2344

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Identities\WM9.exe

Filesize
48KB

MD5
f1fc5545364d92b7e003e4a402989943

SHA1
2ae504cf918e0cde083fa41ea786c45ae2013698

SHA256
930e9e6e3d6f29fc42880cf774e91cf71dfa8923e5bd153d2030ed6f3eaa17aa

SHA512
7f1bd065a94645f8f3850231e5885b3b85e26b7c553491819276b34491f4129d2890c9054dff53e8e24c2cdfffdc76923a1c088a4d64c0c9bc9b636c8178bb85

Download Submit
C:\Users\Admin\AppData\Roaming\Identities\WM9.exe

Filesize
71KB

MD5
374dcd64ea822838dcf28164f0b8e305

SHA1
b6958c80ffb9dfd98886c06f1da94b260589d922

SHA256
05153ac01c78d299618fb63876f15b209de1906099288a4cb56aaa4bc051269a

SHA512
05d130ace7aa635f91933bd2848d0985343d4a2984db85faadbe193bdbf3c30342e4b16f6a64f34c1328c5ef0866f2ed4612931b9b1005a265b6b319669e8d3c

Download Submit
\Users\Admin\AppData\Roaming\Identities\WM9.exe

Filesize
159KB

MD5
a103174262d8c3fd501ffb95323c60b1

SHA1
e40f0dd566ba3d50886d3f9e82bf2c108370d62b

SHA256
bc65e75fcfee4ff9655005f8496f7c86feb892f0caec33c2208e8381cb967248

SHA512
a023dd3997474d427d963a23ccbe7091fdda53d8fde1e1c43eb2e67090a27bd1b0f9eee08757993125cfe10683c38ab0db2194a5847ff51e39d636357c381da2

Download Submit
\Users\Admin\AppData\Roaming\Identities\WM9.exe

Filesize
69KB

MD5
c6a70fc0f81d3ba137c1dab66904913e

SHA1
ccf43c7cb9b410582b437556caf0aefde731f6d4

SHA256
5e97f2816120962d138043f8b55cd522f290e37cac9f308de7211f714a71269d

SHA512
0e1dfe9992030004516d7520605fce7e53980027132266b561c0129be2b7e088e1963da148f62c193db9f8854eb066132944aa694a02b990e93833becf42cd98

Download Submit
\Users\Admin\AppData\Roaming\Identities\WM9.exe

Filesize
92KB

MD5
54f80078ba88b264fc9355e63a5d9c16

SHA1
0e77d6d713e6224ad2c5afd9e5e99c4bf7a0ad20

SHA256
de00ea8c2fd32543ef600267a7f3e5765645f1252c56158b7da467a825bee30b

SHA512
b875682b72c1ae4c24f25e79145cc7969098f7adc1f5dd4138bc912a23147e298bb615213878a60707586930dc950f90d8958e1b3f7d9cc5fe972876d33e9503

Download Submit
memory/1692-1-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/1692-0-0x00000000009C0000-0x0000000000A42000-memory.dmp

Filesize
520KB

Download
memory/1692-2-0x0000000004AE0000-0x0000000004B20000-memory.dmp

Filesize
256KB

Download
memory/1692-12-0x00000000040C0000-0x00000000040FD000-memory.dmp

Filesize
244KB

Download
memory/1692-15-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/1692-13-0x00000000040C0000-0x00000000040FD000-memory.dmp

Filesize
244KB

Download
memory/2704-14-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download

Analysis

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