nanocore | 42a85a33d440c195bbe8890b74fa396875a33fd6354a4b2c7ca6dfb9516c6e6e

General

Target

PO-FRE590164.xlsx
Size

2.2MB
MD5

c175f48a4862c49ec69263b5df33a71f
SHA1

e6c98cffb65b0ef3e59020b4f094e0c5123d7f5b
SHA256

42a85a33d440c195bbe8890b74fa396875a33fd6354a4b2c7ca6dfb9516c6e6e
SHA512

52fa94e7f416a2b904685f7fd52bcfe7bf73dccc9c6410e9b1300e4a549a806073605764e8339db74f2b4dda07d11ea001e011aa3a68e7d486a468b1a5557a0c

Score

10^/10

nanocore evasion keylogger persistence ransomware spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

:4009

127.0.0.1:4009

Mutex

b4dbb526-0da4-4453-8602-b00f5f7a8285

Attributes

activate_away_mode
false
backup_connection_host
127.0.0.1
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-11-06T12:52:22.794043236Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
false
clear_zone_identifier
false
connect_delay
4000
connection_port
4009
default_group
HELP
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
b4dbb526-0da4-4453-8602-b00f5f7a8285
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
primary_dns_server
4009
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
Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

7 1932 EQNEDT32.EXE
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

1520 vbc.exe
1848 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1932 EQNEDT32.EXE
1932 EQNEDT32.EXE
1932 EQNEDT32.EXE
1932 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
7	1932	EQNEDT32.EXE

pid	process
1520	vbc.exe
1848	vbc.exe

pid	process
1932	EQNEDT32.EXE
1932	EQNEDT32.EXE
1932	EQNEDT32.EXE
1932	EQNEDT32.EXE

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

vbc.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\NTFS Manager = "C:\\Program Files (x86)\\NTFS Manager\\ntfsmgr.exe"	vbc.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

vbc.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA vbc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
ransomware

System Information Discovery
T1082
Suspicious use of SetThreadContext 1 IoCs

Processes:

vbc.exe

description pid process target process

PID 1520 set thread context of 1848 1520 vbc.exe vbc.exe

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

description	pid	process	target process
PID 1520 set thread context of 1848	1520	vbc.exe	vbc.exe

Drops file in Program Files directory 2 IoCs

Processes:

vbc.exe

description	ioc	process
File created	C:\Program Files (x86)\NTFS Manager\ntfsmgr.exe	vbc.exe
File opened for modification	C:\Program Files (x86)\NTFS Manager\ntfsmgr.exe	vbc.exe

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1272 schtasks.exe
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE
Launches Equation Editor 1 TTPs 1 IoCs
Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.
exploit

Exploitation for Client Execution
T1203

Processes:

EQNEDT32.EXE

pid process

1932 EQNEDT32.EXE

pid	process
1272	schtasks.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

pid	process
1932	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

336 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

vbc.exe

pid process

1848 vbc.exe
1848 vbc.exe
1848 vbc.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

vbc.exe

pid process

1848 vbc.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

vbc.exevbc.exe

description pid process

Token: SeDebugPrivilege 1520 vbc.exe
Token: SeDebugPrivilege 1848 vbc.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

336 EXCEL.EXE
336 EXCEL.EXE
336 EXCEL.EXE

pid	process
336	EXCEL.EXE

pid	process
1848	vbc.exe
1848	vbc.exe
1848	vbc.exe

pid	process
1848	vbc.exe

description	pid	process
Token: SeDebugPrivilege	1520	vbc.exe
Token: SeDebugPrivilege	1848	vbc.exe

pid	process
336	EXCEL.EXE
336	EXCEL.EXE
336	EXCEL.EXE

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

EQNEDT32.EXEvbc.exe

description	pid	process	target process
PID 1932 wrote to memory of 1520	1932	EQNEDT32.EXE	vbc.exe
PID 1932 wrote to memory of 1520	1932	EQNEDT32.EXE	vbc.exe
PID 1932 wrote to memory of 1520	1932	EQNEDT32.EXE	vbc.exe
PID 1932 wrote to memory of 1520	1932	EQNEDT32.EXE	vbc.exe
PID 1520 wrote to memory of 1272	1520	vbc.exe	schtasks.exe
PID 1520 wrote to memory of 1272	1520	vbc.exe	schtasks.exe
PID 1520 wrote to memory of 1272	1520	vbc.exe	schtasks.exe
PID 1520 wrote to memory of 1272	1520	vbc.exe	schtasks.exe
PID 1520 wrote to memory of 1848	1520	vbc.exe	vbc.exe
PID 1520 wrote to memory of 1848	1520	vbc.exe	vbc.exe
PID 1520 wrote to memory of 1848	1520	vbc.exe	vbc.exe
PID 1520 wrote to memory of 1848	1520	vbc.exe	vbc.exe
PID 1520 wrote to memory of 1848	1520	vbc.exe	vbc.exe
PID 1520 wrote to memory of 1848	1520	vbc.exe	vbc.exe
PID 1520 wrote to memory of 1848	1520	vbc.exe	vbc.exe
PID 1520 wrote to memory of 1848	1520	vbc.exe	vbc.exe
PID 1520 wrote to memory of 1848	1520	vbc.exe	vbc.exe

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\PO-FRE590164.xlsx
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:336

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:1932
- C:\Users\Public\vbc.exe
  "C:\Users\Public\vbc.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1520
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TrXHdHpWh" /XML "C:\Users\Admin\AppData\Local\Temp\tmp89D8.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:1272
- - C:\Users\Public\vbc.exe
    "C:\Users\Public\vbc.exe"
    3⤵
    - Executes dropped EXE
    - 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
    PID:1848

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

Scheduled Task

Scripting

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

Scripting

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp89D8.tmp

MD5
b3281eb62759c0e655abe1c294f446c8

SHA1
b7501e9585cfc745c22f1020aad327830577db09

SHA256
7aa4a6785de9300107aea2fc0309b3d2a69f02978c821751c1bb9de1ee9c3904

SHA512
3d62160c48b02969b7260d19ce8220b3df8e397bfe501129c95b4ea70d4377812d9d38e4974192ed5014ce8e22600b552c84f7fd8072d25b80c75b97cc8ee652

Download Submit
C:\Users\Public\vbc.exe

MD5
81956bb4f67d790e13cfd18f4cdd779b

SHA1
0bf781a6c1434d789f963d5dc76fdeae28cb01b4

SHA256
f2b321a162040b2990fe549349f00c9a60c2827ea0e82486f9c2c785d14d1462

SHA512
a6efb7cd565b2da0811a79c8eeab2d4dc470296a7eccb4badb21ddaf1add94ef3f2f02e2223212a19564137b08919434d65e8be99f1779e9dd475eb11443e9d7

Download Submit
C:\Users\Public\vbc.exe

MD5
81956bb4f67d790e13cfd18f4cdd779b

SHA1
0bf781a6c1434d789f963d5dc76fdeae28cb01b4

SHA256
f2b321a162040b2990fe549349f00c9a60c2827ea0e82486f9c2c785d14d1462

SHA512
a6efb7cd565b2da0811a79c8eeab2d4dc470296a7eccb4badb21ddaf1add94ef3f2f02e2223212a19564137b08919434d65e8be99f1779e9dd475eb11443e9d7

Download Submit
C:\Users\Public\vbc.exe

MD5
81956bb4f67d790e13cfd18f4cdd779b

SHA1
0bf781a6c1434d789f963d5dc76fdeae28cb01b4

SHA256
f2b321a162040b2990fe549349f00c9a60c2827ea0e82486f9c2c785d14d1462

SHA512
a6efb7cd565b2da0811a79c8eeab2d4dc470296a7eccb4badb21ddaf1add94ef3f2f02e2223212a19564137b08919434d65e8be99f1779e9dd475eb11443e9d7

Download Submit
\Users\Public\vbc.exe

MD5
81956bb4f67d790e13cfd18f4cdd779b

SHA1
0bf781a6c1434d789f963d5dc76fdeae28cb01b4

SHA256
f2b321a162040b2990fe549349f00c9a60c2827ea0e82486f9c2c785d14d1462

SHA512
a6efb7cd565b2da0811a79c8eeab2d4dc470296a7eccb4badb21ddaf1add94ef3f2f02e2223212a19564137b08919434d65e8be99f1779e9dd475eb11443e9d7

Download Submit
\Users\Public\vbc.exe

MD5
81956bb4f67d790e13cfd18f4cdd779b

SHA1
0bf781a6c1434d789f963d5dc76fdeae28cb01b4

SHA256
f2b321a162040b2990fe549349f00c9a60c2827ea0e82486f9c2c785d14d1462

SHA512
a6efb7cd565b2da0811a79c8eeab2d4dc470296a7eccb4badb21ddaf1add94ef3f2f02e2223212a19564137b08919434d65e8be99f1779e9dd475eb11443e9d7

Download Submit
\Users\Public\vbc.exe

MD5
81956bb4f67d790e13cfd18f4cdd779b

SHA1
0bf781a6c1434d789f963d5dc76fdeae28cb01b4

SHA256
f2b321a162040b2990fe549349f00c9a60c2827ea0e82486f9c2c785d14d1462

SHA512
a6efb7cd565b2da0811a79c8eeab2d4dc470296a7eccb4badb21ddaf1add94ef3f2f02e2223212a19564137b08919434d65e8be99f1779e9dd475eb11443e9d7

Download Submit
\Users\Public\vbc.exe

MD5
81956bb4f67d790e13cfd18f4cdd779b

SHA1
0bf781a6c1434d789f963d5dc76fdeae28cb01b4

SHA256
f2b321a162040b2990fe549349f00c9a60c2827ea0e82486f9c2c785d14d1462

SHA512
a6efb7cd565b2da0811a79c8eeab2d4dc470296a7eccb4badb21ddaf1add94ef3f2f02e2223212a19564137b08919434d65e8be99f1779e9dd475eb11443e9d7

Download Submit
memory/336-2-0x000000002F351000-0x000000002F354000-memory.dmp

Filesize
12KB

Download
memory/336-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/336-3-0x0000000070DE1000-0x0000000070DE3000-memory.dmp

Filesize
8KB

Download
memory/1264-6-0x000007FEF5BD0000-0x000007FEF5E4A000-memory.dmp

Filesize
2.5MB

Download
memory/1272-20-0x0000000000000000-mapping.dmp

Download
memory/1520-17-0x0000000000480000-0x0000000000483000-memory.dmp

Filesize
12KB

Download
memory/1520-15-0x0000000010F40000-0x0000000010F41000-memory.dmp

Filesize
4KB

Download
memory/1520-18-0x0000000004F30000-0x0000000004F31000-memory.dmp

Filesize
4KB

Download
memory/1520-19-0x00000000051B0000-0x0000000005217000-memory.dmp

Filesize
412KB

Download
memory/1520-14-0x000000006B7E0000-0x000000006BECE000-memory.dmp

Filesize
6.9MB

Download
memory/1520-11-0x0000000000000000-mapping.dmp

Download
memory/1848-26-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1848-23-0x000000000041E792-mapping.dmp

Download
memory/1848-25-0x000000006B7E0000-0x000000006BECE000-memory.dmp

Filesize
6.9MB

Download
memory/1848-22-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1848-28-0x0000000000480000-0x0000000000481000-memory.dmp

Filesize
4KB

Download
memory/1848-29-0x0000000000450000-0x0000000000455000-memory.dmp

Filesize
20KB

Download
memory/1848-30-0x0000000000460000-0x0000000000479000-memory.dmp

Filesize
100KB

Download
memory/1848-31-0x0000000000500000-0x0000000000503000-memory.dmp

Filesize
12KB

Download
memory/1932-5-0x00000000753E1000-0x00000000753E3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads