marsstealer | ffea36eb362bd7a6e654afb51fc067931e46e4e6d54f5a4e2159a9c51c3f1f7c

Resubmissions

22-09-2022 17:10

220922-vp5pysfgdn 10

20-09-2022 16:25

220920-twzlvadfh2 10

Analysis

max time kernel
42s
max time network
45s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
22-09-2022 17:10

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General

Target

b5c6ac787feb4612d8ec375ce35b6a7d.exe
Size

159KB
MD5

b5c6ac787feb4612d8ec375ce35b6a7d
SHA1

2425ebf40b339d9f32aef1122aa2e832c8d51bd6
SHA256

ffea36eb362bd7a6e654afb51fc067931e46e4e6d54f5a4e2159a9c51c3f1f7c
SHA512

1a9c843067bd3ea7d264a16ebcc7d1fdb57c25e3a3ec0e0bf0ea85272224b0286a09a3c68fc38f40bd81af1b9d9038de90b432e2507f5c0404108cc73f698061
SSDEEP

3072:Um/E8k9ZjpIL+zNch12KbAwSaSbJSp8Bb8EG:N/E8k91zz6/t88EG

Score

10^/10

marsstealer default discovery spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

mars.haksanlogistics.com/gate.php

Signatures

Mars Stealer
An infostealer written in C++ based on other infostealers.
stealer marsstealer
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

288 cmd.exe
Loads dropped DLL 2 IoCs

Processes:

b5c6ac787feb4612d8ec375ce35b6a7d.exe

pid process

1112 b5c6ac787feb4612d8ec375ce35b6a7d.exe
1112 b5c6ac787feb4612d8ec375ce35b6a7d.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
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
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). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
288	cmd.exe

pid	process
1112	b5c6ac787feb4612d8ec375ce35b6a7d.exe
1112	b5c6ac787feb4612d8ec375ce35b6a7d.exe

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

Processes:

b5c6ac787feb4612d8ec375ce35b6a7d.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	b5c6ac787feb4612d8ec375ce35b6a7d.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	b5c6ac787feb4612d8ec375ce35b6a7d.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

868 timeout.exe

pid	process
868	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

b5c6ac787feb4612d8ec375ce35b6a7d.execmd.exe

description	pid	process	target process
PID 1112 wrote to memory of 288	1112	b5c6ac787feb4612d8ec375ce35b6a7d.exe	cmd.exe
PID 1112 wrote to memory of 288	1112	b5c6ac787feb4612d8ec375ce35b6a7d.exe	cmd.exe
PID 1112 wrote to memory of 288	1112	b5c6ac787feb4612d8ec375ce35b6a7d.exe	cmd.exe
PID 1112 wrote to memory of 288	1112	b5c6ac787feb4612d8ec375ce35b6a7d.exe	cmd.exe
PID 288 wrote to memory of 868	288	cmd.exe	timeout.exe
PID 288 wrote to memory of 868	288	cmd.exe	timeout.exe
PID 288 wrote to memory of 868	288	cmd.exe	timeout.exe
PID 288 wrote to memory of 868	288	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\b5c6ac787feb4612d8ec375ce35b6a7d.exe
"C:\Users\Admin\AppData\Local\Temp\b5c6ac787feb4612d8ec375ce35b6a7d.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1112
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b5c6ac787feb4612d8ec375ce35b6a7d.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:288
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:868

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

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

\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\nss3.dll

Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
memory/288-77-0x0000000000000000-mapping.dmp

Download
memory/868-79-0x0000000000000000-mapping.dmp

Download
memory/1112-54-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1112-55-0x0000000074D61000-0x0000000074D63000-memory.dmp

Filesize
8KB

Download
memory/1112-56-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/1112-78-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download