nanocore | 89ac7ff2df4d1fe35fc7e54a75b7acea4887f14e6e829fb6eb1fbb3a30a86497

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10/05/2024, 02:56

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General

Target
Contract Letter.scr
Size 293KB
Sample240510-dfct5seh9t
SHA256 8140df9a982cce60568d90f9beade94609ea35e51e8386fd0328c3cb0af2bf76
MD5 d14f5239a9832ec10001d6aac226e3d4
SHA1 09455e731bf58a02afee44fbdda3a231ba3f244f
SHA512 755471f8ad87e82d69545328176eeaf10e912c6f136ba1b326165704046daf4f7378efd889c57d26d1c03b0f61473fca315884215dd11e9dbb59f9186ce5f80f
SSDEEP 6144:DkTR3tpkfqvHm7NB208YdabnINZUQVxR4SHKPNG+P8PrnC:4TRPYyHC987biUQ/RviG+0zn
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

154.16.63.185:7000

Mutex

d11442f0-3ee6-4300-983e-c8ee31789ed3

Attributes

activate_away_mode
true
backup_connection_host
154.16.63.185
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2017-12-10T15:03:12.683218336Z
bypass_user_account_control
false
bypass_user_account_control_data
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
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
7000
default_group
2018
enable_debug_mode
true
gc_threshold
1.048576e+07
keep_alive_timeout
30000
keyboard_logging
false
lan_timeout
2500
max_packet_size
1.048576e+07
mutex
d11442f0-3ee6-4300-983e-c8ee31789ed3
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
154.16.63.185
primary_dns_server
8.8.8.8
request_elevation
true
restart_delay
5000
run_delay
0
run_on_startup
false
set_critical_process
true
timeout_interval
5000
use_custom_dns_server
false
version
1.2.2.0
wan_timeout
8000

Signatures

NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware 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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	Contract Letter.scr
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	app.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\app.S1TBBXqc8fvhKHJr.lnk	app.exe

Executes dropped EXE 2 IoCs

pid	Process
4336	app.exe
3904	app.exe

Adds Run key to start application 2 TTPs 1 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\DDP Service = "C:\\Program Files (x86)\\DDP Service\\ddpsv.exe"	RegAsm.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	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4336 set thread context of 2988	4336	app.exe	104

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\DDP Service\ddpsv.exe	RegAsm.exe
File opened for modification	C:\Program Files (x86)\DDP Service\ddpsv.exe	RegAsm.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.new	Contract Letter.scr
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new	Contract Letter.scr

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2788	schtasks.exe
656	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4336	app.exe
4336	app.exe
4336	app.exe
4336	app.exe
2988	RegAsm.exe
2988	RegAsm.exe
2988	RegAsm.exe
4336	app.exe
4336	app.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2988	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	872	Contract Letter.scr
Token: SeDebugPrivilege	4336	app.exe
Token: SeDebugPrivilege	3904	app.exe
Token: SeDebugPrivilege	2988	RegAsm.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 872 wrote to memory of 804	872	Contract Letter.scr	99
PID 872 wrote to memory of 804	872	Contract Letter.scr	99
PID 872 wrote to memory of 804	872	Contract Letter.scr	99
PID 3648 wrote to memory of 4336	3648	explorer.exe	101
PID 3648 wrote to memory of 4336	3648	explorer.exe	101
PID 3648 wrote to memory of 4336	3648	explorer.exe	101
PID 4336 wrote to memory of 3904	4336	app.exe	103
PID 4336 wrote to memory of 3904	4336	app.exe	103
PID 4336 wrote to memory of 3904	4336	app.exe	103
PID 4336 wrote to memory of 2988	4336	app.exe	104
PID 4336 wrote to memory of 2988	4336	app.exe	104
PID 4336 wrote to memory of 2988	4336	app.exe	104
PID 4336 wrote to memory of 2988	4336	app.exe	104
PID 4336 wrote to memory of 2988	4336	app.exe	104
PID 4336 wrote to memory of 2988	4336	app.exe	104
PID 4336 wrote to memory of 2988	4336	app.exe	104
PID 4336 wrote to memory of 2988	4336	app.exe	104
PID 2988 wrote to memory of 2788	2988	RegAsm.exe	105
PID 2988 wrote to memory of 2788	2988	RegAsm.exe	105
PID 2988 wrote to memory of 2788	2988	RegAsm.exe	105
PID 2988 wrote to memory of 656	2988	RegAsm.exe	107
PID 2988 wrote to memory of 656	2988	RegAsm.exe	107
PID 2988 wrote to memory of 656	2988	RegAsm.exe	107

C:\Users\Admin\AppData\Local\Temp\Contract Letter.scr
"C:\Users\Admin\AppData\Local\Temp\Contract Letter.scr" /S
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:872
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\System32\explorer.exe" /c select, C:\Users\Admin\Desktop\app.exe
  2⤵
  PID:804

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4360,i,17096020621006928097,15544233752327415349,262144 --variations-seed-version --mojo-platform-channel-handle=3240 /prefetch:8
1⤵
PID:5068

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Suspicious use of WriteProcessMemory
PID:3648
- C:\Users\Admin\Desktop\app.exe
  "C:\Users\Admin\Desktop\app.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4336
- - C:\Users\Admin\Desktop\app.exe
    "C:\Users\Admin\Desktop\app.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3904
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
    3⤵
    - Adds Run key to start application
    - Checks whether UAC is enabled
    - Drops file in Program Files directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2988
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks.exe" /create /f /tn "DDP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmpC75D.tmp"
      4⤵
      Creates scheduled task(s)
      PID:2788
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks.exe" /create /f /tn "DDP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpC7AC.tmp"
      4⤵
      Creates scheduled task(s)
      PID:656

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

tmpC75D.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpC75D.tmp
Size 1KB
SHA256 8dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
MD5 c6f0625bf4c1cdfb699980c9243d3b22
SHA1 43de1fe580576935516327f17b5da0c656c72851
SHA512 9ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969
MD5 SHA1 SHA512

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tmpC7AC.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpC7AC.tmp
Size 1KB
SHA256 a18de0ef2102d2546c7afd07ad1d7a071a0e59aff0868cf3937a145f24feb713
MD5 93d357e6194c8eb8d0616a9f592cc4bf
SHA1 5cc3a3d95d82cb88f65cb6dc6c188595fa272808
SHA512 4df079387f6a76e0deb96ab4c11f6cffa62a8b42dc4970e885dab10351fade2d9e933663c141b76409657f85f1bf9dbb533d92dce52dc62598aafc4793743f7f
MD5 SHA1 SHA512

Submit Download

app.exe

Path C:\Users\Admin\Desktop\app.exe
Size 293KB
SHA256 8140df9a982cce60568d90f9beade94609ea35e51e8386fd0328c3cb0af2bf76
MD5 d14f5239a9832ec10001d6aac226e3d4
SHA1 09455e731bf58a02afee44fbdda3a231ba3f244f
SHA512 755471f8ad87e82d69545328176eeaf10e912c6f136ba1b326165704046daf4f7378efd889c57d26d1c03b0f61473fca315884215dd11e9dbb59f9186ce5f80f
SSDEEP 6144:DkTR3tpkfqvHm7NB208YdabnINZUQVxR4SHKPNG+P8PrnC:4TRPYyHC987biUQ/RviG+0zn
MD5 SHA1 SHA512 SSDEEP

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enterprisesec.config.cch

Path C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch
Size 416B
SHA256 3f6271762dea4743ff2de97fa97af86830407ba08bff2c21b4caa367109f563b
MD5 b187e5f175c633c698d5e9c0ef11a8a8
SHA1 385473821721c2bb1afcff54261622f3ddcb46e0
SHA512 01ffb26f46c749686cb0f3ec387bbda15fa0ed1e9bac9a147b355ae57bd9a75878d7087065ea187dc7752adbb10a4849ed70850b84ad96acbc53c4701d240666
MD5 SHA1 SHA512

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memory/872-0-0x0000000074B22000-0x0000000074B23000-memory.dmp

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memory/872-1-0x0000000074B20000-0x00000000750D1000-memory.dmp

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memory/872-2-0x0000000074B20000-0x00000000750D1000-memory.dmp

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memory/872-3-0x0000000074B20000-0x00000000750D1000-memory.dmp

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memory/872-4-0x0000000074B22000-0x0000000074B23000-memory.dmp

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memory/872-5-0x0000000074B20000-0x00000000750D1000-memory.dmp

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memory/872-12-0x0000000074B20000-0x00000000750D1000-memory.dmp

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memory/2988-19-0x0000000000400000-0x0000000000438000-memory.dmp

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