masslogger | 5f53adb34adbcb6eeec29d48e9d80a401d1476eff2e826cb2c7ac02d8d7e2785

Analysis

max time kernel
45s
max time network
140s
platform
windows7_x64
resource
win7v20201028
submitted
21/11/2020, 07:51

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General

Target
SKM_C25820112116120.exe
Size 1.2MB
Sample201121-bd7xsfdv2x
SHA256 5f53adb34adbcb6eeec29d48e9d80a401d1476eff2e826cb2c7ac02d8d7e2785
MD5 2559a4a701f88d7793082cea77f7a73c
SHA1 5548a12e53461128020f9feaefdeac7f797e2830
SHA512 a929420bb0bb9fc22262dbec8145a3c451e241a096c18eb3bd3e78c7766e5b021fcc9462477ea58866f4b329d65a2f2e3ec738fbf64d4dadd201cb3eab428ca2
MD5 SHA1 SHA512

Score

10^/10

masslogger spyware stealer

Malware Config

Extracted

Credentials

Protocol
smtp
Host
mail.turkaykalibrasyon.com
Port
587
Username
[email protected]
Password
Cc_8A46

Signatures

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

MassLogger Main Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2036-1-0x0000000000400000-0x0000000000496000-memory.dmp	family_masslogger
behavioral1/memory/2036-2-0x000000000040188B-mapping.dmp	family_masslogger
behavioral1/memory/2036-4-0x0000000000400000-0x0000000000496000-memory.dmp	family_masslogger
behavioral1/memory/2036-7-0x00000000021A0000-0x0000000002221000-memory.dmp	family_masslogger

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-1-5-21-293278959-2699126792-324916226-1000\Control Panel\International\Geo\Nation	SKM_C25820112116120.exe

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

Data from Local System
T1005

Credentials in Files
T1081

Looks up external IP address via web service 1 IoCs

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

flow	ioc
6	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1744 set thread context of 2036	1744	SKM_C25820112116120.exe	31

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

pid	Process
1352	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2036	SKM_C25820112116120.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2036	SKM_C25820112116120.exe
2036	SKM_C25820112116120.exe
2036	SKM_C25820112116120.exe
2036	SKM_C25820112116120.exe
1748	powershell.exe
1748	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1744	SKM_C25820112116120.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2036	SKM_C25820112116120.exe
Token: SeDebugPrivilege	1748	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2036	SKM_C25820112116120.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1744 wrote to memory of 1240	1744	SKM_C25820112116120.exe	29
PID 1744 wrote to memory of 1240	1744	SKM_C25820112116120.exe	29
PID 1744 wrote to memory of 1240	1744	SKM_C25820112116120.exe	29
PID 1744 wrote to memory of 1240	1744	SKM_C25820112116120.exe	29
PID 1744 wrote to memory of 2036	1744	SKM_C25820112116120.exe	31
PID 1744 wrote to memory of 2036	1744	SKM_C25820112116120.exe	31
PID 1744 wrote to memory of 2036	1744	SKM_C25820112116120.exe	31
PID 1744 wrote to memory of 2036	1744	SKM_C25820112116120.exe	31
PID 1744 wrote to memory of 2036	1744	SKM_C25820112116120.exe	31
PID 1240 wrote to memory of 1352	1240	cmd.exe	32
PID 1240 wrote to memory of 1352	1240	cmd.exe	32
PID 1240 wrote to memory of 1352	1240	cmd.exe	32
PID 1240 wrote to memory of 1352	1240	cmd.exe	32
PID 2036 wrote to memory of 1748	2036	SKM_C25820112116120.exe	34
PID 2036 wrote to memory of 1748	2036	SKM_C25820112116120.exe	34
PID 2036 wrote to memory of 1748	2036	SKM_C25820112116120.exe	34
PID 2036 wrote to memory of 1748	2036	SKM_C25820112116120.exe	34

C:\Users\Admin\AppData\Local\Temp\SKM_C25820112116120.exe
"C:\Users\Admin\AppData\Local\Temp\SKM_C25820112116120.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1744
- C:\Windows\SysWOW64\cmd.exe
  cmd /c schtasks /Create /TN name /XML "C:\Users\Admin\AppData\Local\Temp\3bc9d0e4991c4127854c846f1c363314.xml"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1240
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /Create /TN name /XML "C:\Users\Admin\AppData\Local\Temp\3bc9d0e4991c4127854c846f1c363314.xml"
    3⤵
    - Creates scheduled task(s)
    PID:1352
- C:\Users\Admin\AppData\Local\Temp\SKM_C25820112116120.exe
  "C:\Users\Admin\AppData\Local\Temp\SKM_C25820112116120.exe"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2036
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "powershell" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\SKM_C25820112116120.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1748

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

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1748-19-0x0000000005610000-0x0000000005611000-memory.dmp

Download

memory/1748-24-0x00000000056B0000-0x00000000056B1000-memory.dmp

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memory/1748-48-0x00000000065D0000-0x00000000065D1000-memory.dmp

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memory/1748-47-0x00000000065C0000-0x00000000065C1000-memory.dmp

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memory/1748-33-0x0000000006290000-0x0000000006291000-memory.dmp

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memory/1748-10-0x0000000073E00000-0x00000000744EE000-memory.dmp

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memory/1748-11-0x0000000000A60000-0x0000000000A61000-memory.dmp

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memory/1748-13-0x0000000004910000-0x0000000004911000-memory.dmp

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memory/1748-32-0x0000000006200000-0x0000000006201000-memory.dmp

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memory/1748-25-0x0000000006160000-0x0000000006161000-memory.dmp

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memory/1748-15-0x0000000002500000-0x0000000002501000-memory.dmp

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memory/1748-16-0x0000000004850000-0x0000000004851000-memory.dmp

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memory/2036-12-0x0000000002110000-0x0000000002149000-memory.dmp

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memory/2036-1-0x0000000000400000-0x0000000000496000-memory.dmp

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memory/2036-14-0x00000000065A0000-0x000000000662D000-memory.dmp

Download

memory/2036-7-0x00000000021A0000-0x0000000002221000-memory.dmp

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memory/2036-6-0x0000000073E00000-0x00000000744EE000-memory.dmp

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memory/2036-4-0x0000000000400000-0x0000000000496000-memory.dmp

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