nanocore | c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c

General

Target

c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe
Size

1.1MB
MD5

950f1e4709c69aee0e9bf082fd91574d
SHA1

dd7a010f52069362d8ec13df361c489efbca675a
SHA256

c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c
SHA512

c3d8d5baf233708637360761711913cf220d37397697235da37edfd2a2ad6f96c420b8b81e6147a45b7b05668a43aa9ce3b8a35ef9a519dcf3f6c55b0e1c55a4
SSDEEP

24576:9TbBv5rUeTHpvm6tcMbtjd5v21lcgNdNd0fuiI:XBvHpvnZhUcgX0GB

Score

10^/10

nanocore discovery evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

december2n.duckdns.org:40111

december2nd.ddns.net:40111

Mutex

32ca6e6e-2fe0-4ef5-a3ea-5de451e80042

Attributes

activate_away_mode
false
backup_connection_host
december2nd.ddns.net
backup_dns_server
buffer_size
65538
build_time
2022-11-26T05:13:34.059050336Z
bypass_user_account_control
false
bypass_user_account_control_data
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
clear_access_control
false
clear_zone_identifier
false
connect_delay
4000
connection_port
40111
default_group
mama
enable_debug_mode
true
gc_threshold
1.0485772e+07
keep_alive_timeout
30000
keyboard_logging
false
lan_timeout
2500
max_packet_size
1.0485772e+07
mutex
32ca6e6e-2fe0-4ef5-a3ea-5de451e80042
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
december2n.duckdns.org
primary_dns_server
request_elevation
true
restart_delay
5000
run_delay
0
run_on_startup
false
set_critical_process
false
timeout_interval
5000
use_custom_dns_server
false
version
1.2.2.0
wan_timeout
8009

Signatures

NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore
Nanocore family
nanocore

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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	wscript.exe

Executes dropped EXE 2 IoCs

pid	Process
1040	fvtum.pif
4588	RegSvcs.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\SMTP Subsystem = "C:\\Program Files (x86)\\SMTP Subsystem\\smtpss.exe"	RegSvcs.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Chrome = "C:\\Users\\Admin\\AppData\\Local\\Temp\\twgb\\fvtum.pif C:\\Users\\Admin\\AppData\\Local\\Temp\\twgb\\xebp.mp3"	fvtum.pif
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\AutoUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\twgb\\Update.vbs"	fvtum.pif

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1040 set thread context of 4588	1040	fvtum.pif	92

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\SMTP Subsystem\smtpss.exe	RegSvcs.exe
File opened for modification	C:\Program Files (x86)\SMTP Subsystem\smtpss.exe	RegSvcs.exe

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 6 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	c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wscript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fvtum.pif
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4724	schtasks.exe
1460	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4588	RegSvcs.exe
4588	RegSvcs.exe
4588	RegSvcs.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4588	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4588	RegSvcs.exe
Token: SeDebugPrivilege	4588	RegSvcs.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4684 wrote to memory of 4580	4684	c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe	83
PID 4684 wrote to memory of 4580	4684	c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe	83
PID 4684 wrote to memory of 4580	4684	c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe	83
PID 4580 wrote to memory of 1040	4580	wscript.exe	84
PID 4580 wrote to memory of 1040	4580	wscript.exe	84
PID 4580 wrote to memory of 1040	4580	wscript.exe	84
PID 1040 wrote to memory of 4588	1040	fvtum.pif	92
PID 1040 wrote to memory of 4588	1040	fvtum.pif	92
PID 1040 wrote to memory of 4588	1040	fvtum.pif	92
PID 1040 wrote to memory of 4588	1040	fvtum.pif	92
PID 1040 wrote to memory of 4588	1040	fvtum.pif	92
PID 4588 wrote to memory of 4724	4588	RegSvcs.exe	93
PID 4588 wrote to memory of 4724	4588	RegSvcs.exe	93
PID 4588 wrote to memory of 4724	4588	RegSvcs.exe	93
PID 4588 wrote to memory of 1460	4588	RegSvcs.exe	95
PID 4588 wrote to memory of 1460	4588	RegSvcs.exe	95
PID 4588 wrote to memory of 1460	4588	RegSvcs.exe	95

C:\Users\Admin\AppData\Local\Temp\c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe
"C:\Users\Admin\AppData\Local\Temp\c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4684
- C:\Windows\SysWOW64\wscript.exe
  "C:\Windows\System32\wscript.exe" Update-do.i.vbe
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4580
- - C:\Users\Admin\AppData\Local\Temp\twgb\fvtum.pif
    "C:\Users\Admin\AppData\Local\Temp\twgb\fvtum.pif" xebp.mp3
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1040
  - - C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
      "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Checks whether UAC is enabled
      Drops file in Program Files directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4588
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks.exe" /create /f /tn "SMTP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpCE8B.tmp"
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:4724
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks.exe" /create /f /tn "SMTP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpCEEA.tmp"
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1460

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe

Filesize
44KB

MD5
9d352bc46709f0cb5ec974633a0c3c94

SHA1
1969771b2f022f9a86d77ac4d4d239becdf08d07

SHA256
2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390

SHA512
13c714244ec56beeb202279e4109d59c2a43c3cf29f90a374a751c04fd472b45228ca5a0178f41109ed863dbd34e0879e4a21f5e38ae3d89559c57e6be990a9b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpCE8B.tmp

Filesize
1KB

MD5
95aceabc58acad5d73372b0966ee1b35

SHA1
2293b7ad4793cf574b1a5220e85f329b5601040a

SHA256
8d9642e1c3cd1e0b5d1763de2fb5e605ba593e5a918b93eec15acbc5dcc48fd4

SHA512
00760dfc9d8caf357f0cee5336e5448a4cca18e32cc63e1a69c16e34fe00ea29acd5b2cf278e86c6f9c3e66a1b176d27ed927361848212e6bf1fade7d3d06e74

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpCEEA.tmp

Filesize
1KB

MD5
0339b45ef206f4becc88be0d65e24b9e

SHA1
6503a1851f4ccd8c80a31f96bd7ae40d962c9fad

SHA256
3d568a47a8944a47f4aed6982755ac7ff7dda469cc1c81c213ecaa5d89de1f83

SHA512
c98f4513db34d50510dd986e0d812545c442bd5bef26932032b165759627fab4e00c95fe907ab3416a8a1042bfa77aa516c479f1ff7d1ec2f21ae66df8f72551

Download Submit
C:\Users\Admin\AppData\Local\Temp\twgb\alimhh.dll

Filesize
31KB

MD5
7a9c7f57757ad97e2117eef574e2358e

SHA1
4e4d93bd64b94f08ab507a462291c4dd91fbdd23

SHA256
5491d9cf3673842e5fc06747e6e55ecaf93688210f52fd521611194e493d911b

SHA512
bfae9e262d1d2df402fac4671b6ca5b5940cf16bc6c217c15f3b038b738f1645da9c163b452ebf89505fd36f2f5af44bad5fcefa3f8ed272c736be4ebf239d7d

Download Submit
C:\Users\Admin\AppData\Local\Temp\twgb\fvtum.pif

Filesize
1.2MB

MD5
044b14a71e0453cd74c513920fb61839

SHA1
7c693ddc0df7d100b2d7554365c5c4024851068b

SHA256
6c6e082b6c56c06767d76288ad97a744f19ffd7d64d4cf03181ce6f76bdf4f8a

SHA512
3807f6e044b2dcc980dae350a43390f04a18b3b71161213ab5d6ec94caef9f47d73a95a0f9063fe033a49147b836cc6af9f95f580aa67d40ee1cddcdf453850d

Download Submit
C:\Users\Admin\AppData\Local\Temp\twgb\iunolw.tbh

Filesize
397KB

MD5
47a3760694424f080062061971c9e2ae

SHA1
107b8682b9322ee4886ade154c88c3cfebd24ae9

SHA256
2a454fbe70bedf8e9df6bb9172fd14b941b675a3465a80bc9b0fe20b499ef4ad

SHA512
31d92fc367c857fa71598fbb3346f292da574855d013a7cab0b5715eac80a7e2b37d863c92dcdb3b1ef34fc6e3529630460c9b23ba22e3d41e4553c5f3a3e655

Download Submit
C:\Users\Admin\AppData\Local\temp\twgb\Update-do.i.vbe

Filesize
80KB

MD5
681b715e18750d3be54efc53d100de5a

SHA1
92e6d8b2512a4d86dac46c0926709973d3b19457

SHA256
1fc98f0579ecaec74db49efd3f3a199419588828676b811053d4d088e0483030

SHA512
384f59a6bdaf7964b795cbfeb1cc04711e6e59753104e70a3b9c3805b5ed22565f448bfb119f619b0653caaf785f96495e14c36c557b02279ee69fbafa162f1e

Download Submit
memory/4588-74-0x00000000009A0000-0x00000000009DA000-memory.dmp

Filesize
232KB

Download
memory/4588-76-0x00000000055B0000-0x0000000005642000-memory.dmp

Filesize
584KB

Download
memory/4588-77-0x0000000005650000-0x00000000056EC000-memory.dmp

Filesize
624KB

Download
memory/4588-78-0x0000000005570000-0x000000000557A000-memory.dmp

Filesize
40KB

Download
memory/4588-75-0x0000000005B60000-0x0000000006104000-memory.dmp

Filesize
5.6MB

Download
memory/4588-71-0x00000000009A0000-0x0000000000F4C000-memory.dmp

Filesize
5.7MB

Download
memory/4588-86-0x0000000005780000-0x000000000578A000-memory.dmp

Filesize
40KB

Download
memory/4588-87-0x0000000005790000-0x000000000579C000-memory.dmp

Filesize
48KB

Download
memory/4588-88-0x0000000006700000-0x000000000671E000-memory.dmp

Filesize
120KB

Download
memory/4588-89-0x0000000006820000-0x000000000682A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads