masslogger | 14836e19f657b3a82b1f58dfb846ff1eb66f72ea7eb9b840c2de4b2ceeddcddd

Analysis

max time kernel
139s
max time network
132s
platform
windows10_x64
resource
win10v20201028
submitted
24/12/2020, 14:20

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General

Target
OOCLU57731000013.xls.exe
Size 892KB
Sample201224-b2rlkhrj92
SHA256 14836e19f657b3a82b1f58dfb846ff1eb66f72ea7eb9b840c2de4b2ceeddcddd
MD5 7c3df39bc1a99d5b392330206083461b
SHA1 7f60f5dc06d5f4a91d606312747bbc770226bbb3
SHA512 3cab1494e1a137045c0b7eb005c169fb56b26efc7754b80ff44090502c11a4f96d36b0bd403cc309e0b9fca4220bad4cdcaa8b6905483fbb9d4ec000964c9985
MD5 SHA1 SHA512

Score

10^/10

masslogger 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 3 IoCs

resource	yara_rule
behavioral2/memory/3956-11-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger
behavioral2/memory/3956-12-0x000000000048149E-mapping.dmp	family_masslogger
behavioral2/memory/1280-66-0x000000000048149E-mapping.dmp	family_masslogger

Executes dropped EXE 2 IoCs

pid	Process
1480	nslookup.exe
1280	nslookup.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-3341490333-719741536-2920803124-1000\Control Panel\International\Geo\Nation	OOCLU57731000013.xls.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Control Panel\International\Geo\Nation	nslookup.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 2 IoCs

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

flow	ioc
20	api.ipify.org
22	api.ipify.org

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4648 set thread context of 3956	4648	OOCLU57731000013.xls.exe	78
PID 1480 set thread context of 1280	1480	nslookup.exe	89

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
996	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
852	timeout.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1280	nslookup.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
3956	OOCLU57731000013.xls.exe
1868	powershell.exe
1868	powershell.exe
1868	powershell.exe
1280	nslookup.exe
1280	nslookup.exe
1280	nslookup.exe
1280	nslookup.exe
2608	powershell.exe
2608	powershell.exe
2608	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3956	OOCLU57731000013.xls.exe
Token: SeDebugPrivilege	1868	powershell.exe
Token: SeDebugPrivilege	1280	nslookup.exe
Token: SeDebugPrivilege	2608	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1280	nslookup.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 4648 wrote to memory of 3956	4648	OOCLU57731000013.xls.exe	78
PID 4648 wrote to memory of 3956	4648	OOCLU57731000013.xls.exe	78
PID 4648 wrote to memory of 3956	4648	OOCLU57731000013.xls.exe	78
PID 4648 wrote to memory of 3956	4648	OOCLU57731000013.xls.exe	78
PID 4648 wrote to memory of 3956	4648	OOCLU57731000013.xls.exe	78
PID 4648 wrote to memory of 3956	4648	OOCLU57731000013.xls.exe	78
PID 4648 wrote to memory of 3956	4648	OOCLU57731000013.xls.exe	78
PID 4648 wrote to memory of 3956	4648	OOCLU57731000013.xls.exe	78
PID 3956 wrote to memory of 1868	3956	OOCLU57731000013.xls.exe	80
PID 3956 wrote to memory of 1868	3956	OOCLU57731000013.xls.exe	80
PID 3956 wrote to memory of 1868	3956	OOCLU57731000013.xls.exe	80
PID 3956 wrote to memory of 4436	3956	OOCLU57731000013.xls.exe	82
PID 3956 wrote to memory of 4436	3956	OOCLU57731000013.xls.exe	82
PID 3956 wrote to memory of 4436	3956	OOCLU57731000013.xls.exe	82
PID 3956 wrote to memory of 4416	3956	OOCLU57731000013.xls.exe	83
PID 3956 wrote to memory of 4416	3956	OOCLU57731000013.xls.exe	83
PID 3956 wrote to memory of 4416	3956	OOCLU57731000013.xls.exe	83
PID 4416 wrote to memory of 852	4416	cmd.exe	86
PID 4416 wrote to memory of 852	4416	cmd.exe	86
PID 4416 wrote to memory of 852	4416	cmd.exe	86
PID 4436 wrote to memory of 996	4436	cmd.exe	87
PID 4436 wrote to memory of 996	4436	cmd.exe	87
PID 4436 wrote to memory of 996	4436	cmd.exe	87
PID 4416 wrote to memory of 1480	4416	cmd.exe	88
PID 4416 wrote to memory of 1480	4416	cmd.exe	88
PID 4416 wrote to memory of 1480	4416	cmd.exe	88
PID 1480 wrote to memory of 1280	1480	nslookup.exe	89
PID 1480 wrote to memory of 1280	1480	nslookup.exe	89
PID 1480 wrote to memory of 1280	1480	nslookup.exe	89
PID 1480 wrote to memory of 1280	1480	nslookup.exe	89
PID 1480 wrote to memory of 1280	1480	nslookup.exe	89
PID 1480 wrote to memory of 1280	1480	nslookup.exe	89
PID 1480 wrote to memory of 1280	1480	nslookup.exe	89
PID 1480 wrote to memory of 1280	1480	nslookup.exe	89
PID 1280 wrote to memory of 2608	1280	nslookup.exe	90
PID 1280 wrote to memory of 2608	1280	nslookup.exe	90
PID 1280 wrote to memory of 2608	1280	nslookup.exe	90

C:\Users\Admin\AppData\Local\Temp\OOCLU57731000013.xls.exe
"C:\Users\Admin\AppData\Local\Temp\OOCLU57731000013.xls.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4648
- C:\Users\Admin\AppData\Local\Temp\OOCLU57731000013.xls.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3956
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "powershell" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\OOCLU57731000013.xls.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1868
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn nslookup.exe /tr '"C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4436
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn nslookup.exe /tr '"C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe"'
      4⤵
      Creates scheduled task(s)
      PID:996
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3A5A.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4416
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:852
  - - C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe
      "C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:1480
    - - C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        Checks computer location settings
        Suspicious behavior: AddClipboardFormatListener
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:1280
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe'
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2608

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

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Downloads

memory/1280-69-0x0000000073E30000-0x000000007451E000-memory.dmp

Download

memory/1280-77-0x0000000007220000-0x0000000007221000-memory.dmp

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memory/1480-52-0x0000000073E30000-0x000000007451E000-memory.dmp

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memory/1868-31-0x00000000080A0000-0x00000000080A1000-memory.dmp

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memory/1868-36-0x00000000086A0000-0x00000000086A1000-memory.dmp

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memory/1868-62-0x0000000009990000-0x0000000009991000-memory.dmp

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memory/1868-27-0x0000000007690000-0x0000000007691000-memory.dmp

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memory/1868-28-0x0000000007730000-0x0000000007731000-memory.dmp

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memory/1868-24-0x0000000007970000-0x0000000007971000-memory.dmp

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memory/1868-23-0x0000000003460000-0x0000000003461000-memory.dmp

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memory/1868-22-0x0000000073E30000-0x000000007451E000-memory.dmp

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memory/1868-34-0x0000000007830000-0x0000000007831000-memory.dmp

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memory/1868-35-0x0000000008810000-0x0000000008811000-memory.dmp

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memory/1868-60-0x00000000099B0000-0x00000000099B1000-memory.dmp

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memory/1868-38-0x0000000009720000-0x0000000009753000-memory.dmp

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memory/1868-45-0x00000000094C0000-0x00000000094C1000-memory.dmp

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memory/1868-46-0x0000000009850000-0x0000000009851000-memory.dmp

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memory/1868-47-0x0000000009A50000-0x0000000009A51000-memory.dmp

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memory/2608-89-0x0000000008D20000-0x0000000008D21000-memory.dmp

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memory/2608-86-0x0000000008360000-0x0000000008361000-memory.dmp

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memory/2608-80-0x0000000073E30000-0x000000007451E000-memory.dmp

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memory/2608-100-0x0000000009C70000-0x0000000009C71000-memory.dmp

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memory/3956-19-0x0000000006840000-0x0000000006841000-memory.dmp

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memory/3956-11-0x0000000000400000-0x0000000000486000-memory.dmp

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memory/3956-14-0x0000000073E30000-0x000000007451E000-memory.dmp

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memory/4648-8-0x0000000008D00000-0x0000000008D01000-memory.dmp

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memory/4648-6-0x0000000003390000-0x0000000003391000-memory.dmp

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memory/4648-5-0x0000000005CC0000-0x0000000005CC1000-memory.dmp

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memory/4648-7-0x0000000003360000-0x0000000003361000-memory.dmp

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memory/4648-9-0x0000000005B70000-0x0000000005B74000-memory.dmp

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memory/4648-3-0x0000000000DA0000-0x0000000000DA1000-memory.dmp

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memory/4648-2-0x0000000073E30000-0x000000007451E000-memory.dmp

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memory/4648-10-0x0000000009020000-0x00000000090BE000-memory.dmp

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