masslogger | affd41df487700a59f27d10e8a52a4fe7f10907f7bbf3f11d1e8b26e8435384d

Analysis

max time kernel
60s
max time network
190s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
21/05/2022, 12:18

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General

Target

SKBMT__B.exe
Size

807KB
MD5

848160f98c9f8649b24e626a9b2b771c
SHA1

0f9b15af9c94d497979efc1ad64e81ce89a8ed76
SHA256

4e232298aee519176835a2da80f0a04ac027ac235a5b5ea51974c66318b59245
SHA512

235f7516b632632a79994cc7d35a725a141d88f301d63c40d4c68ed225075769e2aae6f2d5671c638c002d1ad136e718534517e17d4a206391e40e63610db242

Score

10^/10

masslogger ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\8236ADF044\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 10 Pro64bit CPU: Intel Core Processor (Broadwell) GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 2:30:05 PM MassLogger Started: 5/21/2022 2:29:50 PM Interval: 96 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Signatures

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
behavioral2/memory/1656-136-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-139-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-141-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-143-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-145-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-147-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-149-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-151-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-153-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-155-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-157-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-159-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-161-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-163-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-165-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-167-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-169-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-171-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-173-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-175-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-177-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-179-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-183-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-181-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-185-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-189-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-187-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-191-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-193-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-195-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-197-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/1656-199-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

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-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	SKBMT__B.exe

Looks up external IP address via web service 2 IoCs

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

flow	ioc
28	api.ipify.org
29	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3204 set thread context of 1656	3204	SKBMT__B.exe	83

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1656	SKBMT__B.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1656	SKBMT__B.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3204 wrote to memory of 1656	3204	SKBMT__B.exe	83
PID 3204 wrote to memory of 1656	3204	SKBMT__B.exe	83
PID 3204 wrote to memory of 1656	3204	SKBMT__B.exe	83
PID 3204 wrote to memory of 1656	3204	SKBMT__B.exe	83
PID 3204 wrote to memory of 1656	3204	SKBMT__B.exe	83
PID 3204 wrote to memory of 1656	3204	SKBMT__B.exe	83
PID 3204 wrote to memory of 1656	3204	SKBMT__B.exe	83
PID 3204 wrote to memory of 1656	3204	SKBMT__B.exe	83

C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe
"C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3204
- C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe
  "C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1656

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

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\SKBMT__B.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

Download Submit
memory/1656-163-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-157-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-646-0x0000000005560000-0x00000000055C6000-memory.dmp

Filesize
408KB

Download
memory/1656-199-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-136-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-197-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-139-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-141-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-143-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-145-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-147-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-149-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-151-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-153-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-155-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-195-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-159-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-193-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-161-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-171-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-167-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-169-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-165-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-173-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-175-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-177-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-179-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-183-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-181-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-185-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-189-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-187-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1656-191-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/3204-132-0x00000000057C0000-0x0000000005852000-memory.dmp

Filesize
584KB

Download
memory/3204-130-0x0000000000D00000-0x0000000000DD0000-memory.dmp

Filesize
832KB

Download
memory/3204-131-0x0000000005CD0000-0x0000000006274000-memory.dmp

Filesize
5.6MB

Download
memory/3204-134-0x0000000009280000-0x000000000931C000-memory.dmp

Filesize
624KB

Download
memory/3204-133-0x0000000005790000-0x000000000579A000-memory.dmp

Filesize
40KB

Download