nanocore | 26321ed18abb4d44668e157dcb9a123debe3b7477d95055d20e5f5d997bf60d7

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29-06-2024 09:31

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General

Target

virussign.com_ec03c8da575fa5ee4745506b340968e.exe
Size

296KB
MD5

ec03c8da575fa5ee4745506b340968e6
SHA1

357374aa9b28d6571ebcf3b535b3cd8fe85eebba
SHA256

26321ed18abb4d44668e157dcb9a123debe3b7477d95055d20e5f5d997bf60d7
SHA512

2d01fa27ef375f77db7e3a896877db902ea52578aaa13aaec2aef3ce8a0199b1de56ca70602bac24f4fd2278ed5835e2c373c0626a05e95929deb93abb94137a
SSDEEP

6144:ou+rdxKERB7nPpuU8Dh1tUS/fqLaiU6xVB3Y8TTp6VmSyp7jk:gdxK8B7nAU87tabNNTd6VnypU

Score

10^/10

nanocore evasion keylogger spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

munan.duckdns.org:3637

munabc.duckdns.org:3637

Mutex

4d5a1bc9-ba60-4ed4-85d1-96a1836c92b0

Attributes

activate_away_mode
true
backup_connection_host
munabc.duckdns.org
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2023-09-24T00:04:44.813706136Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
3637
default_group
MUNA
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
4d5a1bc9-ba60-4ed4-85d1-96a1836c92b0
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
munan.duckdns.org
primary_dns_server
8.8.8.8
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
Executes dropped EXE 2 IoCs

Processes:

DDfiles.exeDDfiles.exe

pid process

4936 DDfiles.exe
4116 DDfiles.exe
Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA RegAsm.exe

pid	process
4936	DDfiles.exe
4116	DDfiles.exe

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

Suspicious use of SetThreadContext 3 IoCs

Processes:

virussign.com_ec03c8da575fa5ee4745506b340968e.exeDDfiles.exeDDfiles.exe

description	pid	process	target process
PID 2300 set thread context of 4444	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	RegAsm.exe
PID 4936 set thread context of 4992	4936	DDfiles.exe	RegAsm.exe
PID 4116 set thread context of 5056	4116	DDfiles.exe	RegAsm.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

Processes:

schtasks.exeschtasks.exeschtasks.exe

pid process

904 schtasks.exe
1768 schtasks.exe
1640 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

RegAsm.exe

pid process

4444 RegAsm.exe
4444 RegAsm.exe
4444 RegAsm.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

RegAsm.exe

pid process

4444 RegAsm.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegAsm.exe

description pid process

Token: SeDebugPrivilege 4444 RegAsm.exe

pid	process
904	schtasks.exe
1768	schtasks.exe
1640	schtasks.exe

pid	process
4444	RegAsm.exe
4444	RegAsm.exe
4444	RegAsm.exe

pid	process
4444	RegAsm.exe

description	pid	process
Token: SeDebugPrivilege	4444	RegAsm.exe

Suspicious use of WriteProcessMemory 60 IoCs

Processes:

virussign.com_ec03c8da575fa5ee4745506b340968e.execmd.exeDDfiles.execmd.exeDDfiles.execmd.exe

description	pid	process	target process
PID 2300 wrote to memory of 4444	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	RegAsm.exe
PID 2300 wrote to memory of 4444	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	RegAsm.exe
PID 2300 wrote to memory of 4444	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	RegAsm.exe
PID 2300 wrote to memory of 4444	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	RegAsm.exe
PID 2300 wrote to memory of 4444	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	RegAsm.exe
PID 2300 wrote to memory of 4444	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	RegAsm.exe
PID 2300 wrote to memory of 4444	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	RegAsm.exe
PID 2300 wrote to memory of 4444	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	RegAsm.exe
PID 2300 wrote to memory of 4788	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	cmd.exe
PID 2300 wrote to memory of 4788	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	cmd.exe
PID 2300 wrote to memory of 4788	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	cmd.exe
PID 2300 wrote to memory of 2124	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	cmd.exe
PID 2300 wrote to memory of 2124	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	cmd.exe
PID 2300 wrote to memory of 2124	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	cmd.exe
PID 2300 wrote to memory of 1436	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	cmd.exe
PID 2300 wrote to memory of 1436	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	cmd.exe
PID 2300 wrote to memory of 1436	2300	virussign.com_ec03c8da575fa5ee4745506b340968e.exe	cmd.exe
PID 2124 wrote to memory of 904	2124	cmd.exe	schtasks.exe
PID 2124 wrote to memory of 904	2124	cmd.exe	schtasks.exe
PID 2124 wrote to memory of 904	2124	cmd.exe	schtasks.exe
PID 4936 wrote to memory of 4992	4936	DDfiles.exe	RegAsm.exe
PID 4936 wrote to memory of 4992	4936	DDfiles.exe	RegAsm.exe
PID 4936 wrote to memory of 4992	4936	DDfiles.exe	RegAsm.exe
PID 4936 wrote to memory of 4992	4936	DDfiles.exe	RegAsm.exe
PID 4936 wrote to memory of 4992	4936	DDfiles.exe	RegAsm.exe
PID 4936 wrote to memory of 4992	4936	DDfiles.exe	RegAsm.exe
PID 4936 wrote to memory of 4992	4936	DDfiles.exe	RegAsm.exe
PID 4936 wrote to memory of 4992	4936	DDfiles.exe	RegAsm.exe
PID 4936 wrote to memory of 2952	4936	DDfiles.exe	cmd.exe
PID 4936 wrote to memory of 2952	4936	DDfiles.exe	cmd.exe
PID 4936 wrote to memory of 2952	4936	DDfiles.exe	cmd.exe
PID 4936 wrote to memory of 4580	4936	DDfiles.exe	cmd.exe
PID 4936 wrote to memory of 4580	4936	DDfiles.exe	cmd.exe
PID 4936 wrote to memory of 4580	4936	DDfiles.exe	cmd.exe
PID 4936 wrote to memory of 2188	4936	DDfiles.exe	cmd.exe
PID 4936 wrote to memory of 2188	4936	DDfiles.exe	cmd.exe
PID 4936 wrote to memory of 2188	4936	DDfiles.exe	cmd.exe
PID 4580 wrote to memory of 1768	4580	cmd.exe	schtasks.exe
PID 4580 wrote to memory of 1768	4580	cmd.exe	schtasks.exe
PID 4580 wrote to memory of 1768	4580	cmd.exe	schtasks.exe
PID 4116 wrote to memory of 5056	4116	DDfiles.exe	RegAsm.exe
PID 4116 wrote to memory of 5056	4116	DDfiles.exe	RegAsm.exe
PID 4116 wrote to memory of 5056	4116	DDfiles.exe	RegAsm.exe
PID 4116 wrote to memory of 5056	4116	DDfiles.exe	RegAsm.exe
PID 4116 wrote to memory of 5056	4116	DDfiles.exe	RegAsm.exe
PID 4116 wrote to memory of 5056	4116	DDfiles.exe	RegAsm.exe
PID 4116 wrote to memory of 5056	4116	DDfiles.exe	RegAsm.exe
PID 4116 wrote to memory of 5056	4116	DDfiles.exe	RegAsm.exe
PID 4116 wrote to memory of 4364	4116	DDfiles.exe	cmd.exe
PID 4116 wrote to memory of 4364	4116	DDfiles.exe	cmd.exe
PID 4116 wrote to memory of 4364	4116	DDfiles.exe	cmd.exe
PID 4116 wrote to memory of 3184	4116	DDfiles.exe	cmd.exe
PID 4116 wrote to memory of 3184	4116	DDfiles.exe	cmd.exe
PID 4116 wrote to memory of 3184	4116	DDfiles.exe	cmd.exe
PID 4116 wrote to memory of 4324	4116	DDfiles.exe	cmd.exe
PID 4116 wrote to memory of 4324	4116	DDfiles.exe	cmd.exe
PID 4116 wrote to memory of 4324	4116	DDfiles.exe	cmd.exe
PID 3184 wrote to memory of 1640	3184	cmd.exe	schtasks.exe
PID 3184 wrote to memory of 1640	3184	cmd.exe	schtasks.exe
PID 3184 wrote to memory of 1640	3184	cmd.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\virussign.com_ec03c8da575fa5ee4745506b340968e.exe
"C:\Users\Admin\AppData\Local\Temp\virussign.com_ec03c8da575fa5ee4745506b340968e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2300

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:4444

C:\Windows\SysWOW64\cmd.exe
"cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\DDfiles"
2⤵
PID:4788

C:\Windows\SysWOW64\cmd.exe
"cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe'" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:2124

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe'" /f
3⤵
- Scheduled Task/Job: Scheduled Task
PID:904

C:\Windows\SysWOW64\cmd.exe
"cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\virussign.com_ec03c8da575fa5ee4745506b340968e.exe" "C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe"
2⤵
PID:1436

C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe
C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4936

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
PID:4992

C:\Windows\SysWOW64\cmd.exe
"cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\DDfiles"
2⤵
PID:2952

C:\Windows\SysWOW64\cmd.exe
"cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe'" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:4580

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe'" /f
3⤵
- Scheduled Task/Job: Scheduled Task
PID:1768

C:\Windows\SysWOW64\cmd.exe
"cmd" /c copy "C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe" "C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe"
2⤵
PID:2188

C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe
C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4116

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
PID:5056

C:\Windows\SysWOW64\cmd.exe
"cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\DDfiles"
2⤵
PID:4364

C:\Windows\SysWOW64\cmd.exe
"cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe'" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:3184

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe'" /f
3⤵
- Scheduled Task/Job: Scheduled Task
PID:1640

C:\Windows\SysWOW64\cmd.exe
"cmd" /c copy "C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe" "C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe"
2⤵
PID:4324

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\DDfiles.exe.log
Filesize
520B

MD5
03febbff58da1d3318c31657d89c8542

SHA1
c9e017bd9d0a4fe533795b227c855935d86c2092

SHA256
5164770a37b199a79ccd23b399bb3309228973d9f74c589bc2623dc613b37ac4

SHA512
3750c372bbca1892e9c1b34681d592c693e725a8b149c3d6938079cd467628cec42c4293b0d886b57a786abf45f5e7229247b3445001774e3e793ff5a3accfa3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\RegAsm.exe.log
Filesize
1KB

MD5
84e77a587d94307c0ac1357eb4d3d46f

SHA1
83cc900f9401f43d181207d64c5adba7a85edc1e

SHA256
e16024b092a026a9dc00df69d4b9bbcab7b2dc178dc5291fc308a1abc9304a99

SHA512
aefb5c62200b3ed97718d20a89990954d4d8acdc0a6a73c5a420f1bba619cb79e70c2cd0a579b9f52dc6b09e1de2cea6cd6cac4376cfee92d94e2c01d310f691

Download Submit
C:\Users\Admin\AppData\Roaming\DDfiles\DDfiles.exe
Filesize
296KB

MD5
ec03c8da575fa5ee4745506b340968e6

SHA1
357374aa9b28d6571ebcf3b535b3cd8fe85eebba

SHA256
26321ed18abb4d44668e157dcb9a123debe3b7477d95055d20e5f5d997bf60d7

SHA512
2d01fa27ef375f77db7e3a896877db902ea52578aaa13aaec2aef3ce8a0199b1de56ca70602bac24f4fd2278ed5835e2c373c0626a05e95929deb93abb94137a

Download Submit
memory/2300-0-0x0000000074DCE000-0x0000000074DCF000-memory.dmp

Filesize
4KB

Download
memory/2300-1-0x00000000003A0000-0x00000000003F0000-memory.dmp

Filesize
320KB

Download
memory/2300-2-0x0000000005140000-0x00000000056E4000-memory.dmp

Filesize
5.6MB

Download
memory/2300-3-0x0000000074DC0000-0x0000000075570000-memory.dmp

Filesize
7.7MB

Download
memory/2300-8-0x0000000074DC0000-0x0000000075570000-memory.dmp

Filesize
7.7MB

Download
memory/4444-9-0x0000000005230000-0x00000000052CC000-memory.dmp

Filesize
624KB

Download
memory/4444-12-0x0000000005140000-0x000000000514A000-memory.dmp

Filesize
40KB

Download
memory/4444-14-0x0000000005480000-0x000000000548A000-memory.dmp

Filesize
40KB

Download
memory/4444-15-0x0000000005EC0000-0x0000000005ECC000-memory.dmp

Filesize
48KB

Download
memory/4444-16-0x0000000005ED0000-0x0000000005EEE000-memory.dmp

Filesize
120KB

Download
memory/4444-17-0x0000000005F10000-0x0000000005F1A000-memory.dmp

Filesize
40KB

Download
memory/4444-18-0x0000000074DC0000-0x0000000075570000-memory.dmp

Filesize
7.7MB

Download
memory/4444-7-0x0000000005190000-0x0000000005222000-memory.dmp

Filesize
584KB

Download
memory/4444-6-0x0000000074DC0000-0x0000000075570000-memory.dmp

Filesize
7.7MB

Download
memory/4444-4-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download