darktortilla | 5ea572bc60e811027a4cb1098794eb2dc6bdeae545d8eb27b66c0b48b1688efe

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
20/05/2026, 17:44

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General

Target
PROFORMA_INVOICE.exe
Size 540KB
Sample260520-wbb16ae16p
SHA256 5ea572bc60e811027a4cb1098794eb2dc6bdeae545d8eb27b66c0b48b1688efe
MD5 e46c6772ad83c5bde17092d0b013c363
SHA1 35e02fa0d957d7f70a339d69231b69fbc90909e0
SHA512 0635b2a9e8ae8e4fc5dfeb5a1847240582d73c09786307ce43f6ac2cba66405e390faf31ea6794f05dc8df9b8f0260d09b47edeed94df2e9eed41385b9af3c29
SSDEEP 12288:qf+mzSvmyE4neC/YOm41RBUXypPDbFsIFE0+ThX:uPzSeyEUT9RBU8FNch
TLSH
T1F2C4BE4D23E85A94F9BE2F70957442985B71B91BAD33D32E1B8476FA0F227428D107B3
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

crypter discovery darktortilla masslogger loader persistence spyware stealer

Malware Config

Extracted

Family

masslogger

Attributes

exfiltration_mode
#SMTPEnabled
expire_time_date
2025-02-19
host_password
goodGod2024
host_port
587
host_receiver
[email protected]
host_sender
[email protected]
host_server
mail.mzgold.ir
ssl_slate
True

Signatures

Family: Darktortilla
DarkTortilla is a highly configurable .NET based crypter that delivers a wide range of information stealers.
loader crypter darktortilla
Family: MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

Detects Darktortilla crypter. 1 IoCs

resource	yara_rule
behavioral1/memory/1364-5-0x00000000030D0000-0x00000000030F6000-memory.dmp	darktortilla

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\skype\\skype.exe,"	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\skype\\skype.exe,"	reg.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-1-5-21-876885714-46325919-1482798410-1000\Control Panel\International\Geo\Nation	PROFORMA_INVOICE.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe	cmd.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
3676	skype.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
1	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3676 set thread context of 716	3676	skype.exe	104

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 13 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skype.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PROFORMA_INVOICE.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skype.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 7 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
5004	cmd.exe
2136	PING.EXE
1824	cmd.exe
3264	PING.EXE
1936	PING.EXE
1560	cmd.exe
2444	PING.EXE

Runs ping.exe 1 TTPs 4 IoCs

Remote System Discovery

T1018

pid	Process
2444	PING.EXE
2136	PING.EXE
3264	PING.EXE
1936	PING.EXE

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
1364	PROFORMA_INVOICE.exe
1364	PROFORMA_INVOICE.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
4140	skype.exe
3676	skype.exe
3676	skype.exe
3676	skype.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1364	PROFORMA_INVOICE.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1364	PROFORMA_INVOICE.exe
Token: SeDebugPrivilege	4140	skype.exe
Token: SeDebugPrivilege	3676	skype.exe
Token: SeDebugPrivilege	716	InstallUtil.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1364 wrote to memory of 1560	1364	PROFORMA_INVOICE.exe	89
PID 1560 wrote to memory of 2444	1560	cmd.exe	91
PID 1364 wrote to memory of 4140	1364	PROFORMA_INVOICE.exe	92
PID 4140 wrote to memory of 5004	4140	skype.exe	93
PID 5004 wrote to memory of 2136	5004	cmd.exe	95
PID 4140 wrote to memory of 1824	4140	skype.exe	96
PID 1824 wrote to memory of 3264	1824	cmd.exe	98
PID 1560 wrote to memory of 4948	1560	cmd.exe	99
PID 5004 wrote to memory of 2424	5004	cmd.exe	101
PID 1824 wrote to memory of 1936	1824	cmd.exe	102
PID 1824 wrote to memory of 3676	1824	cmd.exe	103
PID 3676 wrote to memory of 716	3676	skype.exe	104
PID 3676 wrote to memory of 716	3676	skype.exe	104
PID 3676 wrote to memory of 716	3676	skype.exe	104
PID 3676 wrote to memory of 716	3676	skype.exe	104
PID 3676 wrote to memory of 716	3676	skype.exe	104

C:\Users\Admin\AppData\Local\Temp\PROFORMA_INVOICE.exe
"C:\Users\Admin\AppData\Local\Temp\PROFORMA_INVOICE.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1364
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c ping 127.0.0.1 -n 17 > nul && REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe,"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1560
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 17
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2444
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe,"
    3⤵
    - Modifies WinLogon for persistence
    - System Location Discovery: System Language Discovery
    PID:4948
- C:\Users\Admin\AppData\Local\Temp\skype.exe
  "C:\Users\Admin\AppData\Local\Temp\skype.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4140
- - C:\Windows\SysWOW64\cmd.exe
    "cmd" /c ping 127.0.0.1 -n 17 > nul && REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe,"
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:5004
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 17
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:2136
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe,"
      4⤵
      Modifies WinLogon for persistence
      System Location Discovery: System Language Discovery
      PID:2424
- - C:\Windows\SysWOW64\cmd.exe
    "cmd" /c ping 127.0.0.1 -n 16 > nul && copy "C:\Users\Admin\AppData\Local\Temp\skype.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe" && ping 127.0.0.1 -n 16 > nul && "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe"
    3⤵
    - Drops startup file
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:1824
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 16
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:3264
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 16
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:1936
  - - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3676
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:716

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

skype.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\skype.exe.log
Size 1KB
SHA256 da65990601a80b9186fa8160f8a070c3e93bf84c07bcfe4c52ead501d8321585
MD5 93e81f0647657fcf52bdb742521599d5
SHA1 db0b5e08236b5aa02f97ef5dffbc95b6da376b59
SHA512 3b98406305fec326e9d1a45216e3147ac07ac98e8a57e8999d64332c231f6ce0c8ec856e83d30c837ebeeec4253dcc1fd67e53d2f7b314a2b2bfa3fabce732ef
TLSH
T1C9219D303222B5D84D022F53080869C513EF4749BB64EF2CB959231EDD2A457AB211E3
MD5 SHA1 SHA512 TLSH

Submit Download

skype.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe
Size 540KB
SHA256 5ea572bc60e811027a4cb1098794eb2dc6bdeae545d8eb27b66c0b48b1688efe
MD5 e46c6772ad83c5bde17092d0b013c363
SHA1 35e02fa0d957d7f70a339d69231b69fbc90909e0
SHA512 0635b2a9e8ae8e4fc5dfeb5a1847240582d73c09786307ce43f6ac2cba66405e390faf31ea6794f05dc8df9b8f0260d09b47edeed94df2e9eed41385b9af3c29
SSDEEP 12288:qf+mzSvmyE4neC/YOm41RBUXypPDbFsIFE0+ThX:uPzSeyEUT9RBU8FNch
TLSH
T1F2C4BE4D23E85A94F9BE2F70957442985B71B91BAD33D32E1B8476FA0F227428D107B3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/716-20-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1364-6-0x00000000057E0000-0x00000000057EA000-memory.dmp

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memory/1364-4-0x00000000058B0000-0x00000000058C0000-memory.dmp

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memory/1364-5-0x00000000030D0000-0x00000000030F6000-memory.dmp

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memory/1364-0-0x0000000000B90000-0x0000000000C1E000-memory.dmp

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memory/1364-7-0x00000000073D0000-0x00000000078FC000-memory.dmp

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memory/1364-3-0x0000000005730000-0x00000000057CC000-memory.dmp

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memory/1364-2-0x0000000005580000-0x0000000005612000-memory.dmp

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memory/1364-1-0x0000000005C40000-0x00000000061E4000-memory.dmp

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memory/3676-18-0x0000000007DD0000-0x0000000007DEA000-memory.dmp

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memory/3676-19-0x0000000007DF0000-0x0000000007DF6000-memory.dmp

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memory/4140-9-0x00000000049D0000-0x00000000049E0000-memory.dmp

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memory/4140-10-0x00000000049D0000-0x00000000049E0000-memory.dmp

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