masslogger | 550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff

Analysis

max time kernel
75s
max time network
151s
platform
windows7_x64
resource
win7-20220414-en
submitted
25-05-2022 01:15

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General

Target

550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe
Size

905KB
MD5

060cbc77c20d140b7ad9f90fd58d45c3
SHA1

f39d0f1ecb50884c69e81b2fd8f66c4b1d5c5cf4
SHA256

550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff
SHA512

525b3beb849c77b132eb77ea1424605b48d5406a5f93a7f10a13b7837e8c7f363ecca7a7b71169114386679a4dc98077a372461dbf43e062c56e116b4f350fe1

Score

10^/10

masslogger coreentity ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\AEF946DCB4\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.4.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.50 Location: United States OS: Microsoft Windows 7 Ultimate 64bit CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/25/2022 3:19:07 AM MassLogger Started: 5/25/2022 3:18:49 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Signatures

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

resource	yara_rule
behavioral1/memory/988-56-0x00000000005E0000-0x00000000005E8000-memory.dmp	coreentity

MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

resource	yara_rule
behavioral1/memory/988-57-0x0000000007480000-0x0000000007530000-memory.dmp	rezer0

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 988 set thread context of 1536	988	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe	27

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1536	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1536	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 988 wrote to memory of 1536	988	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe	27
PID 988 wrote to memory of 1536	988	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe	27
PID 988 wrote to memory of 1536	988	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe	27
PID 988 wrote to memory of 1536	988	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe	27
PID 988 wrote to memory of 1536	988	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe	27
PID 988 wrote to memory of 1536	988	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe	27
PID 988 wrote to memory of 1536	988	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe	27
PID 988 wrote to memory of 1536	988	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe	27
PID 988 wrote to memory of 1536	988	550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe	27

C:\Users\Admin\AppData\Local\Temp\550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe
"C:\Users\Admin\AppData\Local\Temp\550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:988
- C:\Users\Admin\AppData\Local\Temp\550615c0ae5984a323c65110142b7730c87cd0b4bdc6ff13052983ba8a6ec7ff.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1536

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/988-54-0x0000000000020000-0x0000000000108000-memory.dmp

Filesize
928KB

Download
memory/988-55-0x00000000759F1000-0x00000000759F3000-memory.dmp

Filesize
8KB

Download
memory/988-56-0x00000000005E0000-0x00000000005E8000-memory.dmp

Filesize
32KB

Download
memory/988-57-0x0000000007480000-0x0000000007530000-memory.dmp

Filesize
704KB

Download
memory/1536-58-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-68-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-66-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-70-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-74-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-84-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-90-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-92-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-96-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-104-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-106-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-102-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-100-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-112-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-110-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-120-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-118-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-116-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-114-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-108-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-98-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-94-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-88-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-86-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-82-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-80-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-78-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-76-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-72-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-62-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-61-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-59-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1536-578-0x0000000004BA5000-0x0000000004BB6000-memory.dmp

Filesize
68KB

Download