nanocore | f8eb9b286a0d33e287568961f883aa9d1be6e9ec8cf5eee3a3a1a6b106d02f74

Analysis

max time kernel
149s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:15

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General

Target

b8d253be839cc683e7c8c056a7272d33.exe
Size

256KB
MD5

b8d253be839cc683e7c8c056a7272d33
SHA1

0596e3072db7d22fe4097e06528fbd5bf00e1a6d
SHA256

94c7aadd66bbfe116da0524fb80d36e4fd64238aeef7524cbfe0d8bf1ef73953
SHA512

f72c52993cb70c1d7cea24b97f8bd0477c63c310469999cbc594cb7ea4a47dc19d878377b2835a04937220787cc3d2f342da300a938f0a6a27fdfff982db9445
SSDEEP

6144:85p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ+S:EeGUA5YZazpXUmZhlS

Score

10^/10

nanocore defense_evasion discovery keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

sysupdate24.ddns.net:45400

Mutex

ae82ab7f-db07-49ee-9d2b-76075d76f37f

Attributes

activate_away_mode
true
backup_connection_host
backup_dns_server
buffer_size
65535
build_time
2020-04-24T17:41:53.492468936Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
45400
default_group
Default
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
ae82ab7f-db07-49ee-9d2b-76075d76f37f
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
sysupdate24.ddns.net
primary_dns_server
request_elevation
true
restart_delay
5000
run_delay
0
run_on_startup
true
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
Nanocore family
nanocore

Executes dropped EXE 2 IoCs

pid	Process
2900	a1punf5t2of.exe
2648	a1punf5t2of.exe

Loads dropped DLL 2 IoCs

pid	Process
2540	b8d253be839cc683e7c8c056a7272d33.exe
2900	a1punf5t2of.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\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\b1b2dqljdx3 = "C:\\Users\\Admin\\AppData\\Roaming\\b1b2dqljdx3\\a1punf5t2of.exe"	b8d253be839cc683e7c8c056a7272d33.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	a1punf5t2of.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2900 set thread context of 2648	2900	a1punf5t2of.exe	32

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 3 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	a1punf5t2of.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b8d253be839cc683e7c8c056a7272d33.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a1punf5t2of.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2648	a1punf5t2of.exe
2648	a1punf5t2of.exe
2648	a1punf5t2of.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2648	a1punf5t2of.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2648	a1punf5t2of.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2540 wrote to memory of 2900	2540	b8d253be839cc683e7c8c056a7272d33.exe	31
PID 2540 wrote to memory of 2900	2540	b8d253be839cc683e7c8c056a7272d33.exe	31
PID 2540 wrote to memory of 2900	2540	b8d253be839cc683e7c8c056a7272d33.exe	31
PID 2540 wrote to memory of 2900	2540	b8d253be839cc683e7c8c056a7272d33.exe	31
PID 2540 wrote to memory of 2900	2540	b8d253be839cc683e7c8c056a7272d33.exe	31
PID 2540 wrote to memory of 2900	2540	b8d253be839cc683e7c8c056a7272d33.exe	31
PID 2540 wrote to memory of 2900	2540	b8d253be839cc683e7c8c056a7272d33.exe	31
PID 2900 wrote to memory of 2648	2900	a1punf5t2of.exe	32
PID 2900 wrote to memory of 2648	2900	a1punf5t2of.exe	32
PID 2900 wrote to memory of 2648	2900	a1punf5t2of.exe	32
PID 2900 wrote to memory of 2648	2900	a1punf5t2of.exe	32
PID 2900 wrote to memory of 2648	2900	a1punf5t2of.exe	32
PID 2900 wrote to memory of 2648	2900	a1punf5t2of.exe	32
PID 2900 wrote to memory of 2648	2900	a1punf5t2of.exe	32
PID 2900 wrote to memory of 2648	2900	a1punf5t2of.exe	32
PID 2900 wrote to memory of 2648	2900	a1punf5t2of.exe	32
PID 2900 wrote to memory of 2648	2900	a1punf5t2of.exe	32
PID 2900 wrote to memory of 2648	2900	a1punf5t2of.exe	32
PID 2900 wrote to memory of 2648	2900	a1punf5t2of.exe	32

C:\Users\Admin\AppData\Local\Temp\b8d253be839cc683e7c8c056a7272d33.exe
"C:\Users\Admin\AppData\Local\Temp\b8d253be839cc683e7c8c056a7272d33.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe
  "C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2900
- - C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe
    "C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"
    3⤵
    - Executes dropped EXE
    - Checks whether UAC is enabled
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:2648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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

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Downloads

C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe

Filesize
256KB

MD5
eeaa8c461ce67a93e0f49cc62cd9d76f

SHA1
7c0d8b56146adbc6a4f6ca3c2e492abeacd0b023

SHA256
a6b048c00501cb85183c4b0be5dd914f21010e91da4c669de5445b19b7df3aed

SHA512
2eb1bbcfefaacc96e9d7154f9065136cb65ea343a1746d0b4bf2b8da0c8586dae2f540a60f7cdbf9020886f47a38945802e3b76cb779753011084f3bae02684b

Download Submit
memory/2540-0-0x0000000074201000-0x0000000074202000-memory.dmp

Filesize
4KB

Download
memory/2540-1-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/2540-2-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/2540-3-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/2540-4-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/2540-5-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/2540-16-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/2648-37-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2648-32-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2648-22-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2648-23-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2648-25-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2648-28-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2648-39-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2648-31-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2900-19-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/2900-15-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/2900-20-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/2900-14-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/2900-17-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/2900-18-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/2900-41-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download