masslogger | 85bebb4da660f33be5aefd120cf7e715f76d22d87fc9334413f0061f1a238fa5

General

Target
tmpjvwoc5ur.js
Size 8.5MB
Sample260702-rseq6afy7z
SHA256 85bebb4da660f33be5aefd120cf7e715f76d22d87fc9334413f0061f1a238fa5
MD5 abfd77f13c92d8748e37558ecb3db828
SHA1 15c2d2b96830c529d0479061e99a244a430da360
SHA512 e9dcdf42a9690c5155485e60a1af77b2db1556dc9226fee9b415b292a59f60e10d37131329793bb615ee1702be554f663b2d7309249b9137f7e45df165dbc14f
SSDEEP 3072:jp8Gqo2IYanVsM+nrT6W22q13CEB78GDGRnaOyyAic2A/f24tIDLlFUCpvnXFRH/:ejHNg8u68p1jC
TLSH
T1CE961B2DBBEE015C9C26D386EAF151E4C5ACB92203DF651F80765ECE5312386D93226F
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

collection defense_evasion execution masslogger persistence spyware stealer

Malware Config

Extracted

Credentials

Protocol
smtp
Host
mail.tremisa.com.mx
Port
587
Username
[email protected]
Password
sR%x,ch*U#=b

Extracted

Family

masslogger

Attributes

exfiltration_mode
#SMTPEnabled
expire_time_date
00-00-0000
host_password
sR%x,ch*U#=b
host_port
587
host_receiver
[email protected]
host_sender
[email protected]
host_server
mail.tremisa.com.mx
ssl_slate
False

Signatures

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

Badlisted process makes network request 4 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
18	3400	powershell.exe
21	3400	powershell.exe
26	3400	powershell.exe
34	3400	powershell.exe

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-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	wscript.exe

Registers new Windows logon scripts automatically executed at logon. 1 TTPs 1 IoCs

persistence

Logon Script (Windows)

T1037.001

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2370214745-1838013427-2987045292-1000\Environment\UserInitMprLogonScript = "wscript.exe \"C:\\Users\\Admin\\AppData\\Local\\v7755\\v2054.js\""	powershell.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2370214745-1838013427-2987045292-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	powershell.exe
Key opened	\REGISTRY\USER\S-1-5-21-2370214745-1838013427-2987045292-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	powershell.exe
Key opened	\REGISTRY\USER\S-1-5-21-2370214745-1838013427-2987045292-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	powershell.exe

Looks up external IP address via web service 3 IoCs

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

flow	ioc
17	checkip.dyndns.org
25	reallyfreegeoip.org
26	reallyfreegeoip.org

Obfuscated Files or Information: Command Obfuscation 1 TTPs
Adversaries may obfuscate content during command execution to impede detection.
defense_evasion

Command Obfuscation
T1027.010
Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
3400	powershell.exe
3400	powershell.exe
3400	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3400	powershell.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 4696	2100	wscript.exe	91
PID 4696 wrote to memory of 3400	4696	conhost.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2370214745-1838013427-2987045292-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	powershell.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2370214745-1838013427-2987045292-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	powershell.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\tmpjvwoc5ur.js
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Windows\System32\conhost.exe
  "C:\Windows\System32\conhost.exe" --headless powershell.exe -w h -NOP -noni -EncodedCommand JgAoAFsAcwBjAHIAaQBwAHQAYgBsAG8AYwBrAF0AOgA6AEMAcgBlAGEAdABlACgAJABlAG4AdgA6AHYAWABwAG4AVQAzADgAVQB6AEwAWQBtADAAMgBMACkAKQA=
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4696
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -w h -NOP -noni -EncodedCommand JgAoAFsAcwBjAHIAaQBwAHQAYgBsAG8AYwBrAF0AOgA6AEMAcgBlAGEAdABlACgAJABlAG4AdgA6AHYAWABwAG4AVQAzADgAVQB6AEwAWQBtADAAMgBMACkAKQA=
    3⤵
    - Badlisted process makes network request
    - Registers new Windows logon scripts automatically executed at logon.
    - Accesses Microsoft Outlook profiles
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - outlook_office_path
    - outlook_win_path
    PID:3400

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

JavaScript

1

T1059.007

Persistence

Boot or Logon Initialization Scripts

1

T1037

Logon Script (Windows)

1

T1037.001

Privilege Escalation

Boot or Logon Initialization Scripts

1

T1037

Logon Script (Windows)

1

T1037.001

Defense Evasion

Obfuscated Files or Information

1

T1027

Command Obfuscation

1

T1027.010

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

__PSScriptPolicyTest_tas1uz2u.v3l.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tas1uz2u.v3l.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/3400-0-0x00000243B10B0000-0x00000243B10C0000-memory.dmp

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memory/3400-1-0x00000243B1080000-0x00000243B10A2000-memory.dmp

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memory/3400-9-0x00000243B10B0000-0x00000243B10C0000-memory.dmp

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memory/3400-10-0x00000243B10B0000-0x00000243B10C0000-memory.dmp

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memory/3400-11-0x00000243ADD20000-0x00000243ADED2000-memory.dmp

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memory/3400-12-0x00000243ADED0000-0x00000243ADF26000-memory.dmp

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memory/3400-15-0x00000243ADCF0000-0x00000243ADD0E000-memory.dmp

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memory/3400-16-0x00000243AE0C0000-0x00000243AE110000-memory.dmp

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memory/3400-17-0x00000243B1330000-0x00000243B14F2000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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