masslogger | 4615389657415d2ff06489dfe0e8394977fd68922796a6a1f1afbecab466d45a

Analysis

max time kernel
65s
max time network
150s
platform
windows7_x64
resource
win7-20220414-en
submitted
21-05-2022 01:37

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

RFQ TC3363 554 ref 5578.exe
Size

930KB
MD5

b420ec9b5e7102e29376ed8035492676
SHA1

e78dde3f48dbb4cff8a0a156c240ad4f25fac806
SHA256

61ab7d6bc7b5b5a3f90635ed4208d0528155a4283b1deb656e194caf198cba80
SHA512

2f7297fad8c4c06f07aeb176ef17526a5d7d1f5ec278019ce5a09fa0460db7cf69569721d4d7d25bb45efb9d8c1caca4acc3783d2317bdb02ddad84d2ce5a135

Score

10^/10

masslogger collection coreentity rezer0 spyware stealer

Malware Config

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

Processes:

resource	yara_rule
behavioral1/memory/548-56-0x0000000000490000-0x0000000000498000-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

Processes:

resource	yara_rule
behavioral1/memory/1048-63-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-64-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-65-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-66-0x00000000004A157E-mapping.dmp	family_masslogger
behavioral1/memory/1048-68-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-70-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-72-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-74-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-76-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-78-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-80-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-82-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-84-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-86-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-88-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-90-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-92-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-94-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-96-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-98-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-100-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-102-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-104-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-106-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-108-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-110-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-112-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-114-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-116-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-118-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-120-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1048-122-0x0000000000400000-0x00000000004A6000-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

ReZer0 packer 1 IoCs

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

rezer0

Processes:

resource	yara_rule
behavioral1/memory/548-57-0x0000000005C60000-0x0000000005D0E000-memory.dmp	rezer0

Accesses Microsoft Outlook profiles 1 TTPs 15 IoCs

collection

Email Collection

T1114

Processes:

MSBuild.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\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

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

Processes:

RFQ TC3363 554 ref 5578.exe

description pid process target process

PID 548 set thread context of 1048 548 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

1500 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

MSBuild.exe

pid process

1048 MSBuild.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

MSBuild.exe

pid process

1048 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

MSBuild.exe

description pid process

Token: SeDebugPrivilege 1048 MSBuild.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

MSBuild.exe

pid process

1048 MSBuild.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 548 set thread context of 1048	548	RFQ TC3363 554 ref 5578.exe	MSBuild.exe

pid	process
1500	schtasks.exe

pid	process
1048	MSBuild.exe

pid	process
1048	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	1048	MSBuild.exe

pid	process
1048	MSBuild.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

RFQ TC3363 554 ref 5578.exe

description	pid	process	target process
PID 548 wrote to memory of 1500	548	RFQ TC3363 554 ref 5578.exe	schtasks.exe
PID 548 wrote to memory of 1500	548	RFQ TC3363 554 ref 5578.exe	schtasks.exe
PID 548 wrote to memory of 1500	548	RFQ TC3363 554 ref 5578.exe	schtasks.exe
PID 548 wrote to memory of 1500	548	RFQ TC3363 554 ref 5578.exe	schtasks.exe
PID 548 wrote to memory of 1048	548	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 548 wrote to memory of 1048	548	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 548 wrote to memory of 1048	548	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 548 wrote to memory of 1048	548	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 548 wrote to memory of 1048	548	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 548 wrote to memory of 1048	548	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 548 wrote to memory of 1048	548	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 548 wrote to memory of 1048	548	RFQ TC3363 554 ref 5578.exe	MSBuild.exe
PID 548 wrote to memory of 1048	548	RFQ TC3363 554 ref 5578.exe	MSBuild.exe

outlook_office_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\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-1-5-21-1819626980-2277161760-1023733287-1000\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⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:548
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\juAYXSrOw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp33C.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1500
- 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:1048

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

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\tmp33C.tmp

Filesize
1KB

MD5
a09774e9cec34b099ae78824bce7cf43

SHA1
4025d02c3335323bc6353b91134ffbcddffec575

SHA256
78a13ed6ab8488ef6ff82ab83e750a56e84102736cf9780861956b5e06d4356f

SHA512
b829260800b5b89d0b880cf1aebd3069063e06e170e2850a3ed137fee9a58384a067339e18751b0131c29a25ba3ff57d5711bc5047e09343543368516e9fb924

Download Submit
memory/548-55-0x0000000076181000-0x0000000076183000-memory.dmp

Filesize
8KB

Download
memory/548-56-0x0000000000490000-0x0000000000498000-memory.dmp

Filesize
32KB

Download
memory/548-57-0x0000000005C60000-0x0000000005D0E000-memory.dmp

Filesize
696KB

Download
memory/548-54-0x0000000000F80000-0x000000000106E000-memory.dmp

Filesize
952KB

Download
memory/1048-84-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-88-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-61-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-63-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-64-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-65-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-66-0x00000000004A157E-mapping.dmp

Download
memory/1048-68-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-70-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-72-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-74-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-76-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-78-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-80-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-82-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-572-0x0000000005010000-0x0000000005054000-memory.dmp

Filesize
272KB

Download
memory/1048-86-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-60-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-90-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-92-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-94-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-96-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-98-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-100-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-102-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-104-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-106-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-108-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-110-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-112-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-114-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-116-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-118-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-120-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1048-122-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1500-58-0x0000000000000000-mapping.dmp

Download