nanocore | c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c

Analysis

max time kernel
146s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24-11-2024 03:12

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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

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

Executes dropped EXE 2 IoCs

pid	Process
1716	fvtum.pif
1896	RegSvcs.exe

Loads dropped DLL 2 IoCs

pid	Process
592	wscript.exe
1716	fvtum.pif

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\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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\SCSI Host = "C:\\Program Files (x86)\\SCSI Host\\scsihost.exe"	RegSvcs.exe

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 1716 set thread context of 1896	1716	fvtum.pif	33

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\SCSI Host\scsihost.exe	RegSvcs.exe
File created	C:\Program Files (x86)\SCSI Host\scsihost.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
2352	schtasks.exe
2600	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1896	RegSvcs.exe
1896	RegSvcs.exe
1896	RegSvcs.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1896	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1896	RegSvcs.exe
Token: SeDebugPrivilege	1896	RegSvcs.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2664 wrote to memory of 592	2664	c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe	31
PID 2664 wrote to memory of 592	2664	c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe	31
PID 2664 wrote to memory of 592	2664	c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe	31
PID 2664 wrote to memory of 592	2664	c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe	31
PID 592 wrote to memory of 1716	592	wscript.exe	32
PID 592 wrote to memory of 1716	592	wscript.exe	32
PID 592 wrote to memory of 1716	592	wscript.exe	32
PID 592 wrote to memory of 1716	592	wscript.exe	32
PID 592 wrote to memory of 1716	592	wscript.exe	32
PID 592 wrote to memory of 1716	592	wscript.exe	32
PID 592 wrote to memory of 1716	592	wscript.exe	32
PID 1716 wrote to memory of 1896	1716	fvtum.pif	33
PID 1716 wrote to memory of 1896	1716	fvtum.pif	33
PID 1716 wrote to memory of 1896	1716	fvtum.pif	33
PID 1716 wrote to memory of 1896	1716	fvtum.pif	33
PID 1716 wrote to memory of 1896	1716	fvtum.pif	33
PID 1716 wrote to memory of 1896	1716	fvtum.pif	33
PID 1716 wrote to memory of 1896	1716	fvtum.pif	33
PID 1716 wrote to memory of 1896	1716	fvtum.pif	33
PID 1716 wrote to memory of 1896	1716	fvtum.pif	33
PID 1896 wrote to memory of 2352	1896	RegSvcs.exe	34
PID 1896 wrote to memory of 2352	1896	RegSvcs.exe	34
PID 1896 wrote to memory of 2352	1896	RegSvcs.exe	34
PID 1896 wrote to memory of 2352	1896	RegSvcs.exe	34
PID 1896 wrote to memory of 2600	1896	RegSvcs.exe	36
PID 1896 wrote to memory of 2600	1896	RegSvcs.exe	36
PID 1896 wrote to memory of 2600	1896	RegSvcs.exe	36
PID 1896 wrote to memory of 2600	1896	RegSvcs.exe	36

C:\Users\Admin\AppData\Local\Temp\c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe
"C:\Users\Admin\AppData\Local\Temp\c4fb6d7a5c23c1dcb5550d864503a125ff9615e6c8edf2e6396be5ba68fd704c.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2664
- C:\Windows\SysWOW64\wscript.exe
  "C:\Windows\System32\wscript.exe" Update-do.i.vbe
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:592
- - C:\Users\Admin\AppData\Local\Temp\twgb\fvtum.pif
    "C:\Users\Admin\AppData\Local\Temp\twgb\fvtum.pif" xebp.mp3
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1716
  - - 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:1896
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks.exe" /create /f /tn "SCSI Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp204.tmp"
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2352
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks.exe" /create /f /tn "SCSI Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp2DF.tmp"
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp204.tmp

Filesize
1KB

MD5
95aceabc58acad5d73372b0966ee1b35

SHA1
2293b7ad4793cf574b1a5220e85f329b5601040a

SHA256
8d9642e1c3cd1e0b5d1763de2fb5e605ba593e5a918b93eec15acbc5dcc48fd4

SHA512
00760dfc9d8caf357f0cee5336e5448a4cca18e32cc63e1a69c16e34fe00ea29acd5b2cf278e86c6f9c3e66a1b176d27ed927361848212e6bf1fade7d3d06e74

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2DF.tmp

Filesize
1KB

MD5
9a559f229be0944bc3dc813cde333f50

SHA1
0e97c97eea032b499ff060e799581e32beeceb09

SHA256
a63d853679aa655cced3b62a10855c56f9efd9b50770738b408d728008f73330

SHA512
4cbb2f77283500e86ecf79fd2cbd31d10c3af2fcf6c9a557ee0b1edead229dc07d63a5030b60df57458d52ef8c2a42ec199d2d4cdca387400d047df25b593c68

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

Filesize
44KB

MD5
0e06054beb13192588e745ee63a84173

SHA1
30b7d4d1277bafd04a83779fd566a1f834a8d113

SHA256
c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

SHA512
251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

Download Submit
memory/1896-79-0x0000000000230000-0x0000000000767000-memory.dmp

Filesize
5.2MB

Download
memory/1896-77-0x0000000000230000-0x0000000000767000-memory.dmp

Filesize
5.2MB

Download
memory/1896-76-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1896-82-0x0000000000230000-0x000000000026A000-memory.dmp

Filesize
232KB

Download
memory/1896-80-0x0000000000230000-0x0000000000767000-memory.dmp

Filesize
5.2MB

Download
memory/1896-74-0x0000000000230000-0x0000000000767000-memory.dmp

Filesize
5.2MB

Download
memory/1896-90-0x0000000000A20000-0x0000000000A2A000-memory.dmp

Filesize
40KB

Download
memory/1896-91-0x0000000000A70000-0x0000000000A7C000-memory.dmp

Filesize
48KB

Download
memory/1896-92-0x0000000000A80000-0x0000000000A9E000-memory.dmp

Filesize
120KB

Download
memory/1896-93-0x0000000000AF0000-0x0000000000AFA000-memory.dmp

Filesize
40KB

Download