nanocore | 83d064ee508b2543d3f9fc16f4ed16fee34cf130713d3cee54d5f20ce7f452cc

Resubmissions

11-08-2024 16:29

240811-tzfcdaxdmq 10

11-08-2024 00:43

240811-a3bntawhjk 10

Analysis

max time kernel
209s
max time network
206s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
11-08-2024 00:43

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General

Target

SolaraV2.1 nano.exe
Size

698KB
MD5

0861b1b5f623ebf122b517cd3250357f
SHA1

6ce6bf05c7bad841edeb1c9c5e4772b4d6de9707
SHA256

83d064ee508b2543d3f9fc16f4ed16fee34cf130713d3cee54d5f20ce7f452cc
SHA512

194852228b7ac1763a37c672c4f139548541b026f2d7835b136e5751c11c82dfb3cbaefbc732b29d02900db33ac0324c8be2fc8ab57b179a06fec8e7c73e8c4d
SSDEEP

12288:0LV6BtpmkBl5sqhmzNgpM/9J67+VDNcuOIJfnQLLm:GApfBl5sqhmzNyM/f6ytOsoLS

Score

10^/10

nanocore discovery evasion keylogger persistence spyware stealer trojan

Malware Config

Signatures

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

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\DNS Monitor = "C:\\Program Files (x86)\\DNS Monitor\\dnsmon.exe"	SolaraV2.1 nano.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	SolaraV2.1 nano.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\DNS Monitor\dnsmon.exe	SolaraV2.1 nano.exe
File opened for modification	C:\Program Files (x86)\DNS Monitor\dnsmon.exe	SolaraV2.1 nano.exe

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	SolaraV2.1 nano.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
4748	schtasks.exe
4952	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
4948	SolaraV2.1 nano.exe
4948	SolaraV2.1 nano.exe
4948	SolaraV2.1 nano.exe
4948	SolaraV2.1 nano.exe
4948	SolaraV2.1 nano.exe
4948	SolaraV2.1 nano.exe
4948	SolaraV2.1 nano.exe
4948	SolaraV2.1 nano.exe
4948	SolaraV2.1 nano.exe
4948	SolaraV2.1 nano.exe
4948	SolaraV2.1 nano.exe
4948	SolaraV2.1 nano.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4948	SolaraV2.1 nano.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4948	SolaraV2.1 nano.exe
Token: SeDebugPrivilege	4948	SolaraV2.1 nano.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4948 wrote to memory of 4748	4948	SolaraV2.1 nano.exe	88
PID 4948 wrote to memory of 4748	4948	SolaraV2.1 nano.exe	88
PID 4948 wrote to memory of 4748	4948	SolaraV2.1 nano.exe	88
PID 4948 wrote to memory of 4952	4948	SolaraV2.1 nano.exe	90
PID 4948 wrote to memory of 4952	4948	SolaraV2.1 nano.exe	90
PID 4948 wrote to memory of 4952	4948	SolaraV2.1 nano.exe	90

C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe
"C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe"
1⤵
- 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:4948
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "DNS Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmpA066.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4748
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "DNS Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpA0F4.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4952

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\tmpA066.tmp

Filesize
1KB

MD5
4bb70ae457112a038573b994ab89c3ae

SHA1
7e5057e0034d70f94c17c10438437b138f055780

SHA256
411a8d9306b8233d8dad43faae19467494e84a5458e6e2c461bc9db4c10a940c

SHA512
aaba48de49eb6fef60ec38e3f9f7ec3b4fc5962ff95259c9362afd01a30c6d290475b4c9c4dc5ba442de106ad4bde38d28768caf3f6aaf309e613cc115711dd1

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA0F4.tmp

Filesize
1KB

MD5
7620b805f7bc12c79e126656c858d0e0

SHA1
89f09b8b4ef1fc421ddf5ed0cbbe012fab7fd666

SHA256
4d6ea014d135bdc4a5fd4281ce705672561b0279deab4302e06cbfe95e1080a6

SHA512
b02ac735c98b20020251a23ffa1b0308ad3a1c99593a15a8020d742472b0d5c36caa31c6ca2372e88cfd3b6792206ea7920162c2a33c83da24f0098c0513f562

Download Submit
memory/4948-0-0x0000000074782000-0x0000000074783000-memory.dmp

Filesize
4KB

Download
memory/4948-1-0x0000000074780000-0x0000000074D31000-memory.dmp

Filesize
5.7MB

Download
memory/4948-2-0x0000000074780000-0x0000000074D31000-memory.dmp

Filesize
5.7MB

Download
memory/4948-4-0x0000000074780000-0x0000000074D31000-memory.dmp

Filesize
5.7MB

Download
memory/4948-11-0x0000000074780000-0x0000000074D31000-memory.dmp

Filesize
5.7MB

Download
memory/4948-12-0x0000000074782000-0x0000000074783000-memory.dmp

Filesize
4KB

Download
memory/4948-13-0x0000000074780000-0x0000000074D31000-memory.dmp

Filesize
5.7MB

Download
memory/4948-14-0x0000000074780000-0x0000000074D31000-memory.dmp

Filesize
5.7MB

Download
memory/4948-15-0x0000000074780000-0x0000000074D31000-memory.dmp

Filesize
5.7MB

Download