Analysis
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max time kernel
14s -
max time network
148s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
08-01-2021 19:07
Static task
static1
Behavioral task
behavioral1
Sample
Payment_Confirmation pdf.exe
Resource
win7v20201028
General
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Target
Payment_Confirmation pdf.exe
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Size
436KB
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MD5
767f88a961bfbc1b8f8419a32fbade0b
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SHA1
5577d0635fca390c305ff560ca80a6ea19ff7c5b
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SHA256
4f0035201ba7a3a536727862b8ac8dbf389038c5af1674ff7a982190fed1e30b
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SHA512
c5ebaabcd0ecdd1d0a29e8964b02b8fad9961d7b2f144f0ad9a9b00e94cff1c4656c3154219a08ff062d97ad8d2b083a584cab7dd6e0417f233249ac3a2926c3
Malware Config
Extracted
nanocore
1.2.2.0
185.244.38.210:7008
127.0.0.1:7008
8b524be1-f4fe-4386-bd3a-d447c26466aa
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activate_away_mode
true
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backup_connection_host
127.0.0.1
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backup_dns_server
8.8.4.4
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buffer_size
65535
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build_time
2020-10-20T01:39:31.219190236Z
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bypass_user_account_control
false
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bypass_user_account_control_data
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clear_access_control
true
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clear_zone_identifier
false
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connect_delay
4000
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connection_port
7008
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default_group
Mjx_users
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enable_debug_mode
true
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gc_threshold
1.048576e+07
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keep_alive_timeout
30000
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keyboard_logging
false
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lan_timeout
2500
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max_packet_size
1.048576e+07
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mutex
8b524be1-f4fe-4386-bd3a-d447c26466aa
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mutex_timeout
5000
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prevent_system_sleep
false
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primary_connection_host
185.244.38.210
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primary_dns_server
8.8.8.8
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request_elevation
true
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restart_delay
5000
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run_delay
0
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run_on_startup
false
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set_critical_process
true
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timeout_interval
5000
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use_custom_dns_server
false
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version
1.2.2.0
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wan_timeout
8000
Signatures
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Uses the VBS compiler for execution 1 TTPs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
vbc.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\SMTP Manager = "C:\\Program Files (x86)\\SMTP Manager\\smtpmgr.exe" vbc.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Payment_Confirmation pdf.exedescription pid process target process PID 412 set thread context of 3708 412 Payment_Confirmation pdf.exe vbc.exe -
Drops file in Program Files directory 2 IoCs
Processes:
vbc.exedescription ioc process File created C:\Program Files (x86)\SMTP Manager\smtpmgr.exe vbc.exe File opened for modification C:\Program Files (x86)\SMTP Manager\smtpmgr.exe vbc.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
vbc.exepid process 3708 vbc.exe 3708 vbc.exe 3708 vbc.exe 3708 vbc.exe 3708 vbc.exe 3708 vbc.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
vbc.exepid process 3708 vbc.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
vbc.exedescription pid process Token: SeDebugPrivilege 3708 vbc.exe -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
Payment_Confirmation pdf.exevbc.exedescription pid process target process PID 412 wrote to memory of 3708 412 Payment_Confirmation pdf.exe vbc.exe PID 412 wrote to memory of 3708 412 Payment_Confirmation pdf.exe vbc.exe PID 412 wrote to memory of 3708 412 Payment_Confirmation pdf.exe vbc.exe PID 412 wrote to memory of 3708 412 Payment_Confirmation pdf.exe vbc.exe PID 412 wrote to memory of 3708 412 Payment_Confirmation pdf.exe vbc.exe PID 412 wrote to memory of 3708 412 Payment_Confirmation pdf.exe vbc.exe PID 412 wrote to memory of 3708 412 Payment_Confirmation pdf.exe vbc.exe PID 412 wrote to memory of 3708 412 Payment_Confirmation pdf.exe vbc.exe PID 3708 wrote to memory of 680 3708 vbc.exe schtasks.exe PID 3708 wrote to memory of 680 3708 vbc.exe schtasks.exe PID 3708 wrote to memory of 680 3708 vbc.exe schtasks.exe PID 3708 wrote to memory of 3792 3708 vbc.exe schtasks.exe PID 3708 wrote to memory of 3792 3708 vbc.exe schtasks.exe PID 3708 wrote to memory of 3792 3708 vbc.exe schtasks.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Payment_Confirmation pdf.exe"C:\Users\Admin\AppData\Local\Temp\Payment_Confirmation pdf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"2⤵
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "SMTP Manager" /xml "C:\Users\Admin\AppData\Local\Temp\tmp7BAE.tmp"3⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "SMTP Manager Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp7CC8.tmp"3⤵
- Creates scheduled task(s)
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\tmp7BAE.tmpMD5
808c6e96c170c90d0db522e8947eb2bd
SHA144583694c3c23410d637bb96c0df0921363533ad
SHA256c6b75fb7740d34d55d74b8664ff1ea778638a4916c2b52348ea34de60edd3afc
SHA512928b85e9fddfd7c93623e954dc53367aaf355f74a14601d77e45612ebdb77f3d6c0fc853e154f91f61e64306361885467c16fc211cf1bbdc023658ad35dba1eb
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C:\Users\Admin\AppData\Local\Temp\tmp7CC8.tmpMD5
b3b017f9df206021717a11f11d895402
SHA1e4ea12823af6550ee634536eec1eb14490580a3b
SHA256654dfce2c28024364e679e1b958f3fb81fc6d29685d534d905d1c83a84351024
SHA51295666cb81aa1fd1ade04a32f63381ce8bff274d7d300c0b59cbb10a294c4d1eebaa3000365a2000b38793de030044995cf23e623c5e3648d9b00501f97ff9343
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memory/412-3-0x0000000000850000-0x0000000000851000-memory.dmpFilesize
4KB
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memory/412-5-0x00000000050C0000-0x00000000050C1000-memory.dmpFilesize
4KB
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memory/412-6-0x0000000005040000-0x0000000005052000-memory.dmpFilesize
72KB
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memory/412-2-0x0000000073AD0000-0x00000000741BE000-memory.dmpFilesize
6.9MB
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memory/680-16-0x0000000000000000-mapping.dmp
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memory/3708-20-0x0000000009CB0000-0x0000000009CB5000-memory.dmpFilesize
20KB
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memory/3708-24-0x000000000ABE0000-0x000000000ABF5000-memory.dmpFilesize
84KB
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memory/3708-15-0x00000000099D0000-0x00000000099D1000-memory.dmpFilesize
4KB
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memory/3708-12-0x0000000009F20000-0x0000000009F21000-memory.dmpFilesize
4KB
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memory/3708-9-0x0000000073AD0000-0x00000000741BE000-memory.dmpFilesize
6.9MB
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memory/3708-35-0x000000000B3E0000-0x000000000B3E1000-memory.dmpFilesize
4KB
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memory/3708-8-0x000000000041E792-mapping.dmp
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memory/3708-7-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/3708-21-0x000000000A990000-0x000000000A9A9000-memory.dmpFilesize
100KB
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memory/3708-22-0x000000000ABC0000-0x000000000ABC3000-memory.dmpFilesize
12KB
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memory/3708-23-0x000000000ABD0000-0x000000000ABDD000-memory.dmpFilesize
52KB
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memory/3708-13-0x0000000009A20000-0x0000000009A21000-memory.dmpFilesize
4KB
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memory/3708-25-0x000000000B120000-0x000000000B126000-memory.dmpFilesize
24KB
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memory/3708-26-0x000000000B140000-0x000000000B14C000-memory.dmpFilesize
48KB
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memory/3708-27-0x000000000B150000-0x000000000B157000-memory.dmpFilesize
28KB
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memory/3708-28-0x000000000B160000-0x000000000B166000-memory.dmpFilesize
24KB
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memory/3708-29-0x000000000B170000-0x000000000B17D000-memory.dmpFilesize
52KB
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memory/3708-30-0x000000000B180000-0x000000000B189000-memory.dmpFilesize
36KB
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memory/3708-31-0x000000000B190000-0x000000000B19F000-memory.dmpFilesize
60KB
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memory/3708-32-0x000000000B1B0000-0x000000000B1BA000-memory.dmpFilesize
40KB
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memory/3708-33-0x000000000B1C0000-0x000000000B1E9000-memory.dmpFilesize
164KB
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memory/3708-34-0x000000000B200000-0x000000000B20F000-memory.dmpFilesize
60KB
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memory/3792-18-0x0000000000000000-mapping.dmp