nanocore | 87fc7b8785072dab2c9402433c98c2533b2c08ea2eeb1ecc839f13585c8a6f15

Analysis

max time kernel
147s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-09-2024 01:20

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General

Target

REVISE_RECBTAAH-PI.exe
Size

676KB
MD5

d0c54245dc16324c9170c419f2500737
SHA1

642c7dd025dc31d39b26af7a7be53ba617e78bd4
SHA256

6c22578a9080fc7f38d949df46f1bb88f386fd17ad76d78cac31e5b7782a2685
SHA512

1e95e9efc025c53192de36154f51198181ec445145fdfe7f3b1afc83956cc49a04cbd9c6d318dde926da27057cf149565f5de5cb4208cfa78e01eef3f1f582e4
SSDEEP

12288:49TK3cUmdavrlTGt5jw0LECUfE1F1Yl7tpkA1A9:0K3cFd6JNbDc13SHkG

Score

10^/10

nanocore discovery evasion execution keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

45.66.231.103:7754

7754.hopto.org:7754

Mutex

cee2b15d-82f8-4d85-8dc9-22fd50400675

Attributes

activate_away_mode
true
backup_connection_host
7754.hopto.org
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2024-06-21T07:47:09.033387236Z
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
7754
default_group
7754Nano
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
cee2b15d-82f8-4d85-8dc9-22fd50400675
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
45.66.231.103
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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1712	powershell.exe
2224	powershell.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\UDP Service = "C:\\Program Files (x86)\\UDP Service\\udpsv.exe"	REVISE_RECBTAAH-PI.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	REVISE_RECBTAAH-PI.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3020 set thread context of 2684	3020	REVISE_RECBTAAH-PI.exe	37

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\UDP Service\udpsv.exe	REVISE_RECBTAAH-PI.exe
File opened for modification	C:\Program Files (x86)\UDP Service\udpsv.exe	REVISE_RECBTAAH-PI.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 7 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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	REVISE_RECBTAAH-PI.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	REVISE_RECBTAAH-PI.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2172	schtasks.exe
2624	schtasks.exe
2688	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3020	REVISE_RECBTAAH-PI.exe
3020	REVISE_RECBTAAH-PI.exe
3020	REVISE_RECBTAAH-PI.exe
1712	powershell.exe
2224	powershell.exe
2684	REVISE_RECBTAAH-PI.exe
2684	REVISE_RECBTAAH-PI.exe
2684	REVISE_RECBTAAH-PI.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2684	REVISE_RECBTAAH-PI.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3020	REVISE_RECBTAAH-PI.exe
Token: SeDebugPrivilege	2224	powershell.exe
Token: SeDebugPrivilege	1712	powershell.exe
Token: SeDebugPrivilege	2684	REVISE_RECBTAAH-PI.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 3020 wrote to memory of 1712	3020	REVISE_RECBTAAH-PI.exe	31
PID 3020 wrote to memory of 1712	3020	REVISE_RECBTAAH-PI.exe	31
PID 3020 wrote to memory of 1712	3020	REVISE_RECBTAAH-PI.exe	31
PID 3020 wrote to memory of 1712	3020	REVISE_RECBTAAH-PI.exe	31
PID 3020 wrote to memory of 2224	3020	REVISE_RECBTAAH-PI.exe	33
PID 3020 wrote to memory of 2224	3020	REVISE_RECBTAAH-PI.exe	33
PID 3020 wrote to memory of 2224	3020	REVISE_RECBTAAH-PI.exe	33
PID 3020 wrote to memory of 2224	3020	REVISE_RECBTAAH-PI.exe	33
PID 3020 wrote to memory of 2172	3020	REVISE_RECBTAAH-PI.exe	34
PID 3020 wrote to memory of 2172	3020	REVISE_RECBTAAH-PI.exe	34
PID 3020 wrote to memory of 2172	3020	REVISE_RECBTAAH-PI.exe	34
PID 3020 wrote to memory of 2172	3020	REVISE_RECBTAAH-PI.exe	34
PID 3020 wrote to memory of 2684	3020	REVISE_RECBTAAH-PI.exe	37
PID 3020 wrote to memory of 2684	3020	REVISE_RECBTAAH-PI.exe	37
PID 3020 wrote to memory of 2684	3020	REVISE_RECBTAAH-PI.exe	37
PID 3020 wrote to memory of 2684	3020	REVISE_RECBTAAH-PI.exe	37
PID 3020 wrote to memory of 2684	3020	REVISE_RECBTAAH-PI.exe	37
PID 3020 wrote to memory of 2684	3020	REVISE_RECBTAAH-PI.exe	37
PID 3020 wrote to memory of 2684	3020	REVISE_RECBTAAH-PI.exe	37
PID 3020 wrote to memory of 2684	3020	REVISE_RECBTAAH-PI.exe	37
PID 3020 wrote to memory of 2684	3020	REVISE_RECBTAAH-PI.exe	37
PID 2684 wrote to memory of 2624	2684	REVISE_RECBTAAH-PI.exe	38
PID 2684 wrote to memory of 2624	2684	REVISE_RECBTAAH-PI.exe	38
PID 2684 wrote to memory of 2624	2684	REVISE_RECBTAAH-PI.exe	38
PID 2684 wrote to memory of 2624	2684	REVISE_RECBTAAH-PI.exe	38
PID 2684 wrote to memory of 2688	2684	REVISE_RECBTAAH-PI.exe	40
PID 2684 wrote to memory of 2688	2684	REVISE_RECBTAAH-PI.exe	40
PID 2684 wrote to memory of 2688	2684	REVISE_RECBTAAH-PI.exe	40
PID 2684 wrote to memory of 2688	2684	REVISE_RECBTAAH-PI.exe	40

C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe
"C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3020
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1712
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\oFNArmC.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2224
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\oFNArmC" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE6A7.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2172
- C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe
  "C:\Users\Admin\AppData\Local\Temp\REVISE_RECBTAAH-PI.exe"
  2⤵
  - 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:2684
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "UDP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmpE85C.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2624
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "UDP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpE8DA.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2688

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpE6A7.tmp

Filesize
1KB

MD5
f8850ef47634fe885ed3c81f0414d301

SHA1
d12201ca21245329248c2cdced2295a581e0adae

SHA256
95b10ca1bc316274040827fa5d5452e32ca6608e083c1933ae0efce548226e64

SHA512
1225aa55151a2ba69823cea0daeeac2557fca2fa282820a4fcd8faa365cb7739a39319b930753e3d0a1eb2d7f1483146bc2b30f41e8ed7408dc95b8459276efb

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE85C.tmp

Filesize
1KB

MD5
6f7560bbdc552da8ecfe72886865afcf

SHA1
12a6ca08cd14fabeb51cf51b08f0ef0e0ba79591

SHA256
eb97db02099f25f5dd11e261332a13cb1c3ae3d5b9a0568ffbae797d35cc60cb

SHA512
04b41d85b00806697f3f8951eb99edfe559baa6bf81f77787b64b4e5cd2b3f5dce2b0120d58fb18dc9ee051486bac706618063781b51095ab7fcb008755ce679

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE8DA.tmp

Filesize
1KB

MD5
0a24db62cb5b84309c4803346caaa25d

SHA1
67660778f61bb44168c33ed3fe56ed86cf9583e8

SHA256
38d38647af394a04ee6add9f05c43244f04e64a6b96257f4b241a5038efa82df

SHA512
d25d9df063f44595d5e0bf890755bd387655131ff369eeedf3d11ffcc6202ca4455bbb33a8a926dd06839cbd1ddec3d06809b3c66a82c6518aa14beaa469a548

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
23c28e537164d218c536746745348165

SHA1
72ddb2fc5b43580a33673dbb725293474112d923

SHA256
260dd5b5cba548c0c6ac47914facb7c35c06d860258eedfa243314db66434ac6

SHA512
937c3dda542e839ba8b0833dd61bcdfda4a7d18f38b1926d9131c8c6ff24d5343bc3823f28c2010247b13a464ea2887b8458ef2bad0e824c155c05a7eb76d8c0

Download Submit
memory/2684-31-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2684-29-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2684-42-0x0000000000500000-0x000000000050A000-memory.dmp

Filesize
40KB

Download
memory/2684-41-0x00000000006D0000-0x00000000006EE000-memory.dmp

Filesize
120KB

Download
memory/2684-40-0x00000000004F0000-0x00000000004FA000-memory.dmp

Filesize
40KB

Download
memory/2684-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2684-25-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2684-23-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2684-21-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2684-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2684-28-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3020-0-0x000000007428E000-0x000000007428F000-memory.dmp

Filesize
4KB

Download
memory/3020-5-0x0000000074280000-0x000000007496E000-memory.dmp

Filesize
6.9MB

Download
memory/3020-32-0x0000000074280000-0x000000007496E000-memory.dmp

Filesize
6.9MB

Download
memory/3020-2-0x0000000074280000-0x000000007496E000-memory.dmp

Filesize
6.9MB

Download
memory/3020-1-0x0000000000960000-0x0000000000A10000-memory.dmp

Filesize
704KB

Download
memory/3020-3-0x00000000002C0000-0x00000000002D0000-memory.dmp

Filesize
64KB

Download
memory/3020-4-0x000000007428E000-0x000000007428F000-memory.dmp

Filesize
4KB

Download
memory/3020-6-0x0000000006080000-0x00000000060FA000-memory.dmp

Filesize
488KB

Download