Analysis
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max time kernel
177s -
max time network
171s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
21-05-2022 02:05
Static task
static1
Behavioral task
behavioral1
Sample
img_0933.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
img_0933.exe
Resource
win10v2004-20220414-en
General
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Target
img_0933.exe
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Size
1.4MB
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MD5
f8d0bab3e3367fbd94c1f82eb33714e7
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SHA1
e457ae2ad469dd932300a02a4e3b9c03010d5e31
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SHA256
cc6b0848a3a848c9ee7ce3f63d1e3f95393f6593140e2aab400146c06e593793
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SHA512
0064460f534399a26e4dd2e29804c3f8b7cd3d8b97808a9ae713c6e7eed0facd621ed3d98f3dad1b655ed051e069fbb9e513b1d51d0ccf61bfde30f668c65784
Malware Config
Extracted
C:\Users\Admin\AppData\Local\AEF946DCB4\Log.txt
masslogger
Signatures
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MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
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MassLogger Main Payload 11 IoCs
Processes:
resource yara_rule behavioral1/memory/908-54-0x0000000000A00000-0x0000000000B60000-memory.dmp family_masslogger \Users\Admin\Desktop\.exe family_masslogger C:\Users\Admin\Desktop\.exe family_masslogger C:\Users\Admin\Desktop\.exe family_masslogger behavioral1/memory/300-63-0x0000000001280000-0x00000000013E0000-memory.dmp family_masslogger behavioral1/memory/1428-71-0x0000000000400000-0x000000000049A000-memory.dmp family_masslogger behavioral1/memory/1428-70-0x0000000000400000-0x000000000049A000-memory.dmp family_masslogger behavioral1/memory/1428-72-0x0000000000400000-0x000000000049A000-memory.dmp family_masslogger behavioral1/memory/1428-73-0x000000000049449E-mapping.dmp family_masslogger behavioral1/memory/1428-78-0x0000000000400000-0x000000000049A000-memory.dmp family_masslogger behavioral1/memory/1428-76-0x0000000000400000-0x000000000049A000-memory.dmp family_masslogger -
MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.
Processes:
yara_rule masslogger_log_file -
Executes dropped EXE 2 IoCs
Processes:
.exeRegAsm.exepid process 300 .exe 1428 RegAsm.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
RegAsm.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation RegAsm.exe -
Loads dropped DLL 3 IoCs
Processes:
img_0933.exe.exeRegAsm.exepid process 908 img_0933.exe 300 .exe 1428 RegAsm.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook profiles 1 TTPs 35 IoCs
Processes:
RegAsm.exedescription ioc process Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook RegAsm.exe Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe 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Adds Run key to start application 2 TTPs 2 IoCs
Processes:
reg.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\Run reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\Run\admin = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\Desktop\\.exe" reg.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.
Processes:
flow ioc 4 api.ipify.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
.exedescription pid process target process PID 300 set thread context of 1428 300 .exe RegAsm.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
img_0933.exe.exeRegAsm.exepid process 908 img_0933.exe 908 img_0933.exe 300 .exe 300 .exe 300 .exe 1428 RegAsm.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
img_0933.exe.exeRegAsm.exedescription pid process Token: SeDebugPrivilege 908 img_0933.exe Token: SeDebugPrivilege 300 .exe Token: SeDebugPrivilege 1428 RegAsm.exe -
Suspicious use of WriteProcessMemory 24 IoCs
Processes:
img_0933.execmd.exe.exedescription pid process target process PID 908 wrote to memory of 1996 908 img_0933.exe cmd.exe PID 908 wrote to memory of 1996 908 img_0933.exe cmd.exe PID 908 wrote to memory of 1996 908 img_0933.exe cmd.exe PID 908 wrote to memory of 1996 908 img_0933.exe cmd.exe PID 1996 wrote to memory of 2000 1996 cmd.exe reg.exe PID 1996 wrote to memory of 2000 1996 cmd.exe reg.exe PID 1996 wrote to memory of 2000 1996 cmd.exe reg.exe PID 1996 wrote to memory of 2000 1996 cmd.exe reg.exe PID 908 wrote to memory of 300 908 img_0933.exe .exe PID 908 wrote to memory of 300 908 img_0933.exe .exe PID 908 wrote to memory of 300 908 img_0933.exe .exe PID 908 wrote to memory of 300 908 img_0933.exe .exe PID 300 wrote to memory of 1428 300 .exe RegAsm.exe PID 300 wrote to memory of 1428 300 .exe RegAsm.exe PID 300 wrote to memory of 1428 300 .exe RegAsm.exe PID 300 wrote to memory of 1428 300 .exe RegAsm.exe PID 300 wrote to memory of 1428 300 .exe RegAsm.exe PID 300 wrote to memory of 1428 300 .exe RegAsm.exe PID 300 wrote to memory of 1428 300 .exe RegAsm.exe PID 300 wrote to memory of 1428 300 .exe RegAsm.exe PID 300 wrote to memory of 1428 300 .exe RegAsm.exe PID 300 wrote to memory of 1428 300 .exe RegAsm.exe PID 300 wrote to memory of 1428 300 .exe RegAsm.exe PID 300 wrote to memory of 1428 300 .exe RegAsm.exe -
outlook_office_path 1 IoCs
Processes:
RegAsm.exedescription ioc process Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe -
outlook_win_path 1 IoCs
Processes:
RegAsm.exedescription ioc process Key queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\img_0933.exe"C:\Users\Admin\AppData\Local\Temp\img_0933.exe"1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:908 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v admin /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:1996 -
C:\Windows\SysWOW64\reg.exeREG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v admin /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\.exe"3⤵
- Adds Run key to start application
PID:2000
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C:\Users\Admin\Desktop\.exe"C:\Users\Admin\Desktop\.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:300 -
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Loads dropped DLL
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:1428
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
63KB
MD5b58b926c3574d28d5b7fdd2ca3ec30d5
SHA1d260c4ffd603a9cfc057fcb83d678b1cecdf86f9
SHA2566e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3
SHA512b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab
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Filesize
63KB
MD5b58b926c3574d28d5b7fdd2ca3ec30d5
SHA1d260c4ffd603a9cfc057fcb83d678b1cecdf86f9
SHA2566e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3
SHA512b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab
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Filesize
1.4MB
MD5f8d0bab3e3367fbd94c1f82eb33714e7
SHA1e457ae2ad469dd932300a02a4e3b9c03010d5e31
SHA256cc6b0848a3a848c9ee7ce3f63d1e3f95393f6593140e2aab400146c06e593793
SHA5120064460f534399a26e4dd2e29804c3f8b7cd3d8b97808a9ae713c6e7eed0facd621ed3d98f3dad1b655ed051e069fbb9e513b1d51d0ccf61bfde30f668c65784
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Filesize
1.4MB
MD5f8d0bab3e3367fbd94c1f82eb33714e7
SHA1e457ae2ad469dd932300a02a4e3b9c03010d5e31
SHA256cc6b0848a3a848c9ee7ce3f63d1e3f95393f6593140e2aab400146c06e593793
SHA5120064460f534399a26e4dd2e29804c3f8b7cd3d8b97808a9ae713c6e7eed0facd621ed3d98f3dad1b655ed051e069fbb9e513b1d51d0ccf61bfde30f668c65784
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Filesize
63KB
MD5b58b926c3574d28d5b7fdd2ca3ec30d5
SHA1d260c4ffd603a9cfc057fcb83d678b1cecdf86f9
SHA2566e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3
SHA512b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab
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Filesize
63KB
MD5b58b926c3574d28d5b7fdd2ca3ec30d5
SHA1d260c4ffd603a9cfc057fcb83d678b1cecdf86f9
SHA2566e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3
SHA512b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab
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Filesize
1.4MB
MD5f8d0bab3e3367fbd94c1f82eb33714e7
SHA1e457ae2ad469dd932300a02a4e3b9c03010d5e31
SHA256cc6b0848a3a848c9ee7ce3f63d1e3f95393f6593140e2aab400146c06e593793
SHA5120064460f534399a26e4dd2e29804c3f8b7cd3d8b97808a9ae713c6e7eed0facd621ed3d98f3dad1b655ed051e069fbb9e513b1d51d0ccf61bfde30f668c65784