masslogger | 8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8

Analysis

max time kernel
91s
max time network
175s
platform
windows7_x64
resource
win7-20220414-en
submitted
25-05-2022 01:14

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General

Target

8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe
Size

798KB
MD5

416c6c0776664f4985d665764eb28fbc
SHA1

26cf9f67fd3b9286d71036d2da2d207f2727fe77
SHA256

8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8
SHA512

1d488a73781bfe88b4320eda583762cac4bbf7eba7a6842eaca17f444ff4c31713306e66efc2e338d93282a2a9fb772a1ff7779ab9aa88bfcefcdbc58c163b0b

Score

10^/10

masslogger coreentity ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\3B8E3C2477\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 3:17:58 AM MassLogger Started: 5/25/2022 3:17:51 AM Interval: 1 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.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/1092-56-0x00000000003F0000-0x00000000003F8000-memory.dmp	coreentity

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

MassLogger Main Payload 32 IoCs

resource	yara_rule
behavioral1/memory/1940-61-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-63-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-62-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-68-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-66-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-64-0x00000000004A3FFE-mapping.dmp	family_masslogger
behavioral1/memory/1940-70-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-74-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-76-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-82-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-90-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-88-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-86-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-92-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-96-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-102-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-110-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-114-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-116-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-118-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-112-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-120-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-108-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-106-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-104-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-100-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-98-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-94-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-84-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-80-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-78-0x0000000000400000-0x00000000004AA000-memory.dmp	family_masslogger
behavioral1/memory/1940-72-0x0000000000400000-0x00000000004AA000-memory.dmp	family_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/1092-57-0x0000000004A60000-0x0000000004B10000-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-1-5-21-2277218442-1199762539-2004043321-1000\Control Panel\International\Geo\Nation	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.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 1092 set thread context of 1940	1092	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe	27

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1940	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1940	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1092 wrote to memory of 1940	1092	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe	27
PID 1092 wrote to memory of 1940	1092	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe	27
PID 1092 wrote to memory of 1940	1092	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe	27
PID 1092 wrote to memory of 1940	1092	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe	27
PID 1092 wrote to memory of 1940	1092	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe	27
PID 1092 wrote to memory of 1940	1092	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe	27
PID 1092 wrote to memory of 1940	1092	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe	27
PID 1092 wrote to memory of 1940	1092	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe	27
PID 1092 wrote to memory of 1940	1092	8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe	27

C:\Users\Admin\AppData\Local\Temp\8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe
"C:\Users\Admin\AppData\Local\Temp\8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Users\Admin\AppData\Local\Temp\8a11b451d016d26d350ad4d913de3af9e8ffa77e945955b26e89d23951ada1e8.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1940

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/1092-54-0x00000000008B0000-0x000000000097E000-memory.dmp

Filesize
824KB

Download
memory/1092-55-0x0000000075E51000-0x0000000075E53000-memory.dmp

Filesize
8KB

Download
memory/1092-56-0x00000000003F0000-0x00000000003F8000-memory.dmp

Filesize
32KB

Download
memory/1092-57-0x0000000004A60000-0x0000000004B10000-memory.dmp

Filesize
704KB

Download
memory/1940-61-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-63-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-62-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-68-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-66-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-59-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-58-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-70-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-74-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-76-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-82-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-90-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-88-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-86-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-92-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-96-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-102-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-110-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-114-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-116-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-118-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-112-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-120-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-108-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-106-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-104-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-100-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-98-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-94-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-84-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-80-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-78-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-72-0x0000000000400000-0x00000000004AA000-memory.dmp

Filesize
680KB

Download
memory/1940-578-0x0000000004E65000-0x0000000004E76000-memory.dmp

Filesize
68KB

Download