masslogger | 4615389657415d2ff06489dfe0e8394977fd68922796a6a1f1afbecab466d45a

Analysis

max time kernel
91s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
21-05-2022 01:37

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General

Target

RFQ TC3363 554 ref 5578.exe
Size

930KB
MD5

b420ec9b5e7102e29376ed8035492676
SHA1

e78dde3f48dbb4cff8a0a156c240ad4f25fac806
SHA256

61ab7d6bc7b5b5a3f90635ed4208d0528155a4283b1deb656e194caf198cba80
SHA512

2f7297fad8c4c06f07aeb176ef17526a5d7d1f5ec278019ce5a09fa0460db7cf69569721d4d7d25bb45efb9d8c1caca4acc3783d2317bdb02ddad84d2ce5a135

Score

10^/10

masslogger collection spyware stealer

Malware Config

Signatures

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

MassLogger Main Payload 32 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4440-142-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-144-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-146-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-148-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-152-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-150-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-154-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-156-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-158-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-160-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-162-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-164-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-166-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-168-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-170-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-172-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-174-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-176-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-178-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-180-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-182-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-184-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-186-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-188-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-190-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-192-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-194-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-196-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-198-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-200-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-202-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral2/memory/4440-204-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger

MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.

Processes:

yara_rule

masslogger_log_file

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

Processes:

RFQ TC3363 554 ref 5578.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	RFQ TC3363 554 ref 5578.exe

Accesses Microsoft Outlook profiles 1 TTPs 18 IoCs

collection

Email Collection

T1114

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	MSBuild.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.

Processes:

flow ioc

23 api.ipify.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

RFQ TC3363 554 ref 5578.exe

description pid process target process

PID 2496 set thread context of 4440 2496 RFQ TC3363 554 ref 5578.exe MSBuild.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1672 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

MSBuild.exe

pid process

4440 MSBuild.exe

flow	ioc
23	api.ipify.org

description	pid	process	target process
PID 2496 set thread context of 4440	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe

pid	process
1672	schtasks.exe

pid	process
4440	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

RFQ TC3363 554 ref 5578.exeMSBuild.exe

pid	process
2496	RFQ TC3363 554 ref 5578.exe
2496	RFQ TC3363 554 ref 5578.exe
2496	RFQ TC3363 554 ref 5578.exe
2496	RFQ TC3363 554 ref 5578.exe
2496	RFQ TC3363 554 ref 5578.exe
2496	RFQ TC3363 554 ref 5578.exe
2496	RFQ TC3363 554 ref 5578.exe
2496	RFQ TC3363 554 ref 5578.exe
4440	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

RFQ TC3363 554 ref 5578.exeMSBuild.exe

description pid process

Token: SeDebugPrivilege 2496 RFQ TC3363 554 ref 5578.exe
Token: SeDebugPrivilege 4440 MSBuild.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

MSBuild.exe

pid process

4440 MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	2496	RFQ TC3363 554 ref 5578.exe
Token: SeDebugPrivilege	4440	MSBuild.exe

pid	process
4440	MSBuild.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

RFQ TC3363 554 ref 5578.exe

description	pid	process	target process
PID 2496 wrote to memory of 1672	2496	RFQ TC3363 554 ref 5578.exe	schtasks.exe
PID 2496 wrote to memory of 1672	2496	RFQ TC3363 554 ref 5578.exe	schtasks.exe
PID 2496 wrote to memory of 1672	2496	RFQ TC3363 554 ref 5578.exe	schtasks.exe
PID 2496 wrote to memory of 1200	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 1200	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 1200	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4332	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4332	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4332	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4416	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4416	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4416	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4428	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4428	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4428	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4440	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4440	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4440	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4440	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4440	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4440	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4440	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 2496 wrote to memory of 4440	2496	RFQ TC3363 554 ref 5578.exe	MSBuild.exe

outlook_office_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\RFQ TC3363 554 ref 5578.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ TC3363 554 ref 5578.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2496
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\juAYXSrOw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBBA4.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1672
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "{path}"
  2⤵
  PID:1200
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "{path}"
  2⤵
  PID:4332
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "{path}"
  2⤵
  PID:4416
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "{path}"
  2⤵
  PID:4428
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "{path}"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:4440

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpBBA4.tmp

Filesize
1KB

MD5
cd9dc93c84d16f2bd15edffa941d0e98

SHA1
df628a263cc3db883f7f7a5a84ede146d5358bfb

SHA256
99340f1b313c168b30569fa250b1e3de8a4af4585dd9b1f9db684d7865d9617b

SHA512
6e04f643d4964547f17944ed85b7c4b118f097b2aa35f10291da4e2596184c0123cbde0103d444f5ed2b131fd1397c8ff05e1a3353dac4800cdb531d10fcb933

Download Submit
memory/1200-137-0x0000000000000000-mapping.dmp

Download
memory/1672-135-0x0000000000000000-mapping.dmp

Download
memory/2496-130-0x0000000000B10000-0x0000000000BFE000-memory.dmp

Filesize
952KB

Download
memory/2496-131-0x0000000005A20000-0x0000000005FC4000-memory.dmp

Filesize
5.6MB

Download
memory/2496-132-0x0000000005470000-0x0000000005502000-memory.dmp

Filesize
584KB

Download
memory/2496-133-0x0000000005510000-0x000000000551A000-memory.dmp

Filesize
40KB

Download
memory/2496-134-0x00000000090A0000-0x000000000913C000-memory.dmp

Filesize
624KB

Download
memory/4332-138-0x0000000000000000-mapping.dmp

Download
memory/4416-139-0x0000000000000000-mapping.dmp

Download
memory/4428-140-0x0000000000000000-mapping.dmp

Download
memory/4440-162-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-174-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-144-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-146-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-148-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-152-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-150-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-154-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-156-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-158-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-160-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-141-0x0000000000000000-mapping.dmp

Download
memory/4440-164-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-166-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-168-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-170-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-172-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-142-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-176-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-178-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-180-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-182-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-184-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-186-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-188-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-190-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-192-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-194-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-196-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-198-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-200-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-202-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-204-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4440-643-0x0000000005FC0000-0x0000000006026000-memory.dmp

Filesize
408KB

Download
memory/4440-644-0x0000000007F40000-0x0000000007F90000-memory.dmp

Filesize
320KB

Download