masslogger | 14836e19f657b3a82b1f58dfb846ff1eb66f72ea7eb9b840c2de4b2ceeddcddd

Analysis

max time kernel
149s
max time network
151s
platform
windows7_x64
resource
win7v20201028
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 5 IoCs

resource	yara_rule
behavioral1/memory/656-7-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger
behavioral1/memory/656-8-0x000000000048149E-mapping.dmp	family_masslogger
behavioral1/memory/656-9-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger
behavioral1/memory/656-10-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger
behavioral1/memory/1736-68-0x000000000048149E-mapping.dmp	family_masslogger

Executes dropped EXE 2 IoCs

pid	Process
1964	nslookup.exe
1736	nslookup.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-1-5-21-293278959-2699126792-324916226-1000\Control Panel\International\Geo\Nation	OOCLU57731000013.xls.exe

Loads dropped DLL 1 IoCs

pid	Process
1648	cmd.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.

flow	ioc
5	api.ipify.org

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 788 set thread context of 656	788	OOCLU57731000013.xls.exe	29
PID 1964 set thread context of 1736	1964	nslookup.exe	40

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
1296	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1672	timeout.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
656	OOCLU57731000013.xls.exe
656	OOCLU57731000013.xls.exe
656	OOCLU57731000013.xls.exe
656	OOCLU57731000013.xls.exe
1136	powershell.exe
1136	powershell.exe
1736	nslookup.exe
1736	nslookup.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	656	OOCLU57731000013.xls.exe
Token: SeDebugPrivilege	1136	powershell.exe
Token: SeDebugPrivilege	1736	nslookup.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 788 wrote to memory of 656	788	OOCLU57731000013.xls.exe	29
PID 788 wrote to memory of 656	788	OOCLU57731000013.xls.exe	29
PID 788 wrote to memory of 656	788	OOCLU57731000013.xls.exe	29
PID 788 wrote to memory of 656	788	OOCLU57731000013.xls.exe	29
PID 788 wrote to memory of 656	788	OOCLU57731000013.xls.exe	29
PID 788 wrote to memory of 656	788	OOCLU57731000013.xls.exe	29
PID 788 wrote to memory of 656	788	OOCLU57731000013.xls.exe	29
PID 788 wrote to memory of 656	788	OOCLU57731000013.xls.exe	29
PID 788 wrote to memory of 656	788	OOCLU57731000013.xls.exe	29
PID 656 wrote to memory of 1136	656	OOCLU57731000013.xls.exe	31
PID 656 wrote to memory of 1136	656	OOCLU57731000013.xls.exe	31
PID 656 wrote to memory of 1136	656	OOCLU57731000013.xls.exe	31
PID 656 wrote to memory of 1136	656	OOCLU57731000013.xls.exe	31
PID 656 wrote to memory of 1596	656	OOCLU57731000013.xls.exe	33
PID 656 wrote to memory of 1596	656	OOCLU57731000013.xls.exe	33
PID 656 wrote to memory of 1596	656	OOCLU57731000013.xls.exe	33
PID 656 wrote to memory of 1596	656	OOCLU57731000013.xls.exe	33
PID 656 wrote to memory of 1648	656	OOCLU57731000013.xls.exe	35
PID 656 wrote to memory of 1648	656	OOCLU57731000013.xls.exe	35
PID 656 wrote to memory of 1648	656	OOCLU57731000013.xls.exe	35
PID 656 wrote to memory of 1648	656	OOCLU57731000013.xls.exe	35
PID 1596 wrote to memory of 1296	1596	cmd.exe	36
PID 1596 wrote to memory of 1296	1596	cmd.exe	36
PID 1596 wrote to memory of 1296	1596	cmd.exe	36
PID 1596 wrote to memory of 1296	1596	cmd.exe	36
PID 1648 wrote to memory of 1672	1648	cmd.exe	38
PID 1648 wrote to memory of 1672	1648	cmd.exe	38
PID 1648 wrote to memory of 1672	1648	cmd.exe	38
PID 1648 wrote to memory of 1672	1648	cmd.exe	38
PID 1648 wrote to memory of 1964	1648	cmd.exe	39
PID 1648 wrote to memory of 1964	1648	cmd.exe	39
PID 1648 wrote to memory of 1964	1648	cmd.exe	39
PID 1648 wrote to memory of 1964	1648	cmd.exe	39
PID 1964 wrote to memory of 1736	1964	nslookup.exe	40
PID 1964 wrote to memory of 1736	1964	nslookup.exe	40
PID 1964 wrote to memory of 1736	1964	nslookup.exe	40
PID 1964 wrote to memory of 1736	1964	nslookup.exe	40
PID 1964 wrote to memory of 1736	1964	nslookup.exe	40
PID 1964 wrote to memory of 1736	1964	nslookup.exe	40
PID 1964 wrote to memory of 1736	1964	nslookup.exe	40
PID 1964 wrote to memory of 1736	1964	nslookup.exe	40
PID 1964 wrote to memory of 1736	1964	nslookup.exe	40

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:788
- 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:656
- - 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:1136
- - 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:1596
  - - 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:1296
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp816F.tmp.bat""
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1648
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1672
  - - 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:1964
    - - C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1736

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/656-9-0x0000000000400000-0x0000000000486000-memory.dmp

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memory/656-10-0x0000000000400000-0x0000000000486000-memory.dmp

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memory/656-11-0x0000000074DA0000-0x000000007548E000-memory.dmp

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memory/656-7-0x0000000000400000-0x0000000000486000-memory.dmp

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memory/788-6-0x0000000005EB0000-0x0000000005F4E000-memory.dmp

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memory/788-5-0x00000000002A0000-0x00000000002A4000-memory.dmp

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memory/788-3-0x00000000010F0000-0x00000000010F1000-memory.dmp

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memory/788-2-0x0000000074DA0000-0x000000007548E000-memory.dmp

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memory/1136-23-0x0000000002520000-0x0000000002521000-memory.dmp

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memory/1136-49-0x0000000006280000-0x0000000006281000-memory.dmp

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memory/1136-65-0x0000000006310000-0x0000000006311000-memory.dmp

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memory/1136-64-0x0000000006300000-0x0000000006301000-memory.dmp

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memory/1136-24-0x0000000002860000-0x0000000002861000-memory.dmp

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memory/1136-27-0x0000000005650000-0x0000000005651000-memory.dmp

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memory/1136-17-0x00000000009B0000-0x00000000009B1000-memory.dmp

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memory/1136-16-0x0000000074DA0000-0x000000007548E000-memory.dmp

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memory/1136-50-0x00000000055D0000-0x00000000055D1000-memory.dmp

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memory/1136-20-0x0000000004930000-0x0000000004931000-memory.dmp

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memory/1136-42-0x00000000061A0000-0x00000000061A1000-memory.dmp

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memory/1136-41-0x0000000006040000-0x0000000006041000-memory.dmp

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memory/1736-72-0x0000000074D20000-0x000000007540E000-memory.dmp

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memory/1964-38-0x00000000011D0000-0x00000000011D1000-memory.dmp

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memory/1964-36-0x0000000074DA0000-0x000000007548E000-memory.dmp

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