monster | 9f7be9bf913d8378f094b3f6416db9aa4c80c380000202f7cfaddadb6efc41b4

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
01-08-2024 09:41

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General

Target

build.exe
Size

10.7MB
MD5

c8cf26425a6ce325035e6da8dfb16c4e
SHA1

31c2b3a26c05b4bf8dea8718d1df13a0c2be22ee
SHA256

9f7be9bf913d8378f094b3f6416db9aa4c80c380000202f7cfaddadb6efc41b4
SHA512

0321e48e185c22165ac6429e08afac1ccfdf393249436c8eac8a6d64794b3b399740aa5b2be23d568f57495d17e9220280ed1c2ea8f012b2c4021beb02cbc646
SSDEEP

196608:SnvxO+j9q6y7PuZANMCgvUF+j6yrO5H+KB4kj6vgC51U7BlUdinrDRQF6f1:WvxPBly7Pumdgv9RrOF+LkGvgMGBa4n7

Score

10^/10

monster stealer

Malware Config

Signatures

Detects Monster Stealer. 2 IoCs

resource	yara_rule
behavioral1/files/0x0008000000016dff-35.dat	family_monster
behavioral1/memory/2560-40-0x000000013FD70000-0x0000000140FAE000-memory.dmp	family_monster

Monster
Monster is a Golang stealer that was discovered in 2024.
stealer monster

Executes dropped EXE 1 IoCs

pid	Process
2560	stub.exe

Loads dropped DLL 2 IoCs

pid	Process
2680	build.exe
2560	stub.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 2560	2680	build.exe	30
PID 2680 wrote to memory of 2560	2680	build.exe	30
PID 2680 wrote to memory of 2560	2680	build.exe	30

C:\Users\Admin\AppData\Local\Temp\build.exe
"C:\Users\Admin\AppData\Local\Temp\build.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2680
- C:\Users\Admin\AppData\Local\Temp\onefile_2680_133669789104632000\stub.exe
  "C:\Users\Admin\AppData\Local\Temp\build.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  PID:2560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\onefile_2680_133669789104632000\python310.dll

Filesize
4.3MB

MD5
c80b5cb43e5fe7948c3562c1fff1254e

SHA1
f73cb1fb9445c96ecd56b984a1822e502e71ab9d

SHA256
058925e4bbfcb460a3c00ec824b8390583baef0c780a7c7ff01d43d9eec45f20

SHA512
faa97a9d5d2a0bf78123f19f8657c24921b907268938c26f79e1df6d667f7bee564259a3a11022e8629996406cda9fa00434bb2b1de3e10b9bddc59708dbad81

Download Submit
\Users\Admin\AppData\Local\Temp\onefile_2680_133669789104632000\stub.exe

Filesize
18.0MB

MD5
1cf17408048317fc82265ed6a1c7893d

SHA1
9bfec40d6eb339c5a6c2ad6e5fa7cebc147654c5

SHA256
1352ad9860a42137b096d9675a7b8d578fbc596d965de3cb352619cbe6aaf4e9

SHA512
66322d7cb5931017acaa29970da48642d03ce35007f130511b2848b67169c1dd4167f1e5a31e5e1dfe5f7122846482bdb878b5cd695ac58009033fd620813a0f

Download Submit
memory/2560-40-0x000000013FD70000-0x0000000140FAE000-memory.dmp

Filesize
18.2MB

Download
memory/2680-75-0x000000013F3F0000-0x000000013FEC8000-memory.dmp

Filesize
10.8MB

Download