masslogger | 67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2

General

Target

67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Size

820KB
MD5

6e32f33a38ff5bfa5cd5883e9ea49b96
SHA1

3e3771a344d29ee1afd6a36d6360c0ed80ddb3ff
SHA256

67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2
SHA512

12fdcb1e8f64bcbd2861ffa75631f291ef35c2418be6576dbb9995b9cec3d30b32bd4ed76409e9a80cbfd02a3dc01836fae72c886643009e50ba55000bde90dd
SSDEEP

12288:wsJIlwYGu9Qz1dJmKmq33ckBx2dtkrtGq23qFsAiMJ9kbX/JjNzERmsqWPjtVnD5:wTl7AdFmqfBMpZzMJejyRpPfnf1

Score

10^/10

masslogger collection ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\5A87E7C061\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.7.1 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.13 Location: United States Windows OS: Microsoft Windows 7 Ultimate 64bit Windows Serial Key: D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 1/29/2023 9:32:01 PM MassLogger Started: 1/29/2023 9:31:47 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.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 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1760-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1760-64-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1760-65-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1760-66-0x00000000004A30FE-mapping.dmp	family_masslogger
behavioral1/memory/1760-68-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1760-70-0x0000000000400000-0x00000000004A8000-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/616-57-0x0000000005C70000-0x0000000005D20000-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

Processes:

67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Control Panel\International\Geo\Nation	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 15 IoCs

collection

Email Collection

T1114

Processes:

67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key queried	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key queried	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key queried	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key queried	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key queried	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Key queried	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.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

flow	ioc
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

Processes:

67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

description	pid	process	target process
PID 616 set thread context of 1760	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.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

1168 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

pid process

1760 67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

pid	process
1168	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

pid	process
1760	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
1760	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

description pid process

Token: SeDebugPrivilege 1760 67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

pid process

1760 67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

description	pid	process
Token: SeDebugPrivilege	1760	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

description	pid	process	target process
PID 616 wrote to memory of 1168	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	schtasks.exe
PID 616 wrote to memory of 1168	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	schtasks.exe
PID 616 wrote to memory of 1168	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	schtasks.exe
PID 616 wrote to memory of 1168	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	schtasks.exe
PID 616 wrote to memory of 1760	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
PID 616 wrote to memory of 1760	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
PID 616 wrote to memory of 1760	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
PID 616 wrote to memory of 1760	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
PID 616 wrote to memory of 1760	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
PID 616 wrote to memory of 1760	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
PID 616 wrote to memory of 1760	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
PID 616 wrote to memory of 1760	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
PID 616 wrote to memory of 1760	616	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

outlook_office_path 1 IoCs

Processes:

67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

outlook_win_path 1 IoCs

Processes:

67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe

C:\Users\Admin\AppData\Local\Temp\67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
"C:\Users\Admin\AppData\Local\Temp\67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:616

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NERzax" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3515.tmp"
2⤵
- Creates scheduled task(s)
PID:1168

C:\Users\Admin\AppData\Local\Temp\67a7100bbf102bed2773f56abdb1f761d7255bdf21ddf0a80bd2e7ec316af6e2.exe
"{path}"
2⤵
- Checks computer location settings
- 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:1760

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp3515.tmp
Filesize
1KB

MD5
e7254bf065e02c69b647aa2f53e46d66

SHA1
27b864b73cfb8ae1041a390be337560156751393

SHA256
7015e9714d2e91eea82b60d328dfe14d979b579778ad4ec169cdf790d4f36ab3

SHA512
6d877711853806b1aaea3d173034c685c228245e73f4b3ecaca5434bd5b439ea5e6b01a6c2d9e6459589e4cd9667ec4ac6275baad7f9ff7f9cee76aeaa88fc11

Download Submit
memory/616-54-0x00000000011D0000-0x00000000012A4000-memory.dmp

Filesize
848KB

Download
memory/616-55-0x0000000075931000-0x0000000075933000-memory.dmp

Filesize
8KB

Download
memory/616-56-0x0000000000600000-0x0000000000608000-memory.dmp

Filesize
32KB

Download
memory/616-57-0x0000000005C70000-0x0000000005D20000-memory.dmp

Filesize
704KB

Download
memory/1168-58-0x0000000000000000-mapping.dmp

Download
memory/1760-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1760-61-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1760-60-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1760-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1760-65-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1760-66-0x00000000004A30FE-mapping.dmp

Download
memory/1760-68-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1760-70-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1760-71-0x0000000000970000-0x00000000009B4000-memory.dmp

Filesize
272KB

Download
memory/1760-73-0x0000000004DC5000-0x0000000004DD6000-memory.dmp

Filesize
68KB

Download
memory/1760-74-0x0000000004DC5000-0x0000000004DD6000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads