e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040

Analysis

max time kernel
150s
max time network
125s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
02/10/2022, 00:31

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General

Target

e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
Size

262KB
MD5

6e2201227878e8c95f41af95e7ec0130
SHA1

b0bd08b15c849d36c59d45a1aadfbc60ed39d54b
SHA256

e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040
SHA512

cc9947cac2b669cb5b945b3849205b471726b04626a9c5fa448b6bc6817220a584c6d4dd11a76eca90aa7721bddb8dbeca8387f0864ee8581fa3b09aa19bc694
SSDEEP

6144:5GuUhx/T6VpcVmcOClV7cN1kyymJuc4ECm:5GBTmiIAZa

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	nunos.exe

Executes dropped EXE 1 IoCs

pid	Process
872	nunos.exe

Loads dropped DLL 2 IoCs

pid	Process
1600	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
1600	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe

Adds Run key to start application 2 TTPs 13 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\nunos = "C:\\Users\\Admin\\nunos.exe /n"	nunos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\nunos = "C:\\Users\\Admin\\nunos.exe /j"	nunos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\nunos = "C:\\Users\\Admin\\nunos.exe /w"	nunos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\nunos = "C:\\Users\\Admin\\nunos.exe /i"	nunos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\nunos = "C:\\Users\\Admin\\nunos.exe /u"	nunos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\nunos = "C:\\Users\\Admin\\nunos.exe /l"	nunos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\nunos = "C:\\Users\\Admin\\nunos.exe /h"	nunos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\nunos = "C:\\Users\\Admin\\nunos.exe /a"	nunos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\nunos = "C:\\Users\\Admin\\nunos.exe /q"	nunos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\nunos = "C:\\Users\\Admin\\nunos.exe /g"	nunos.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\nunos = "C:\\Users\\Admin\\nunos.exe /s"	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\	nunos.exe

Maps connected drives based on registry 3 TTPs 4 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	nunos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	nunos.exe

Drops autorun.inf file 1 TTPs 1 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File opened for modification	C:\Users\Admin\c\autorun.inf	nunos.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 56 IoCs

pid	Process
1600	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
1600	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
1600	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
1600	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe
872	nunos.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1600	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
872	nunos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1600 wrote to memory of 872	1600	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe	27
PID 1600 wrote to memory of 872	1600	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe	27
PID 1600 wrote to memory of 872	1600	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe	27
PID 1600 wrote to memory of 872	1600	e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe	27

C:\Users\Admin\AppData\Local\Temp\e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe
"C:\Users\Admin\AppData\Local\Temp\e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040.exe"
1⤵
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1600
- C:\Users\Admin\nunos.exe
  "C:\Users\Admin\nunos.exe"
  2⤵
  - Modifies visiblity of hidden/system files in Explorer
  - Executes dropped EXE
  - Adds Run key to start application
  - Maps connected drives based on registry
  - Drops autorun.inf file
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:872

Network

MITRE ATT&CK Enterprise v6

Initial Access

Replication Through Removable Media

T1091

Execution

Persistence

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\nunos.exe

Filesize
262KB

MD5
6e2201227878e8c95f41af95e7ec0130

SHA1
b0bd08b15c849d36c59d45a1aadfbc60ed39d54b

SHA256
e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040

SHA512
cc9947cac2b669cb5b945b3849205b471726b04626a9c5fa448b6bc6817220a584c6d4dd11a76eca90aa7721bddb8dbeca8387f0864ee8581fa3b09aa19bc694

Download Submit
C:\Users\Admin\nunos.exe

Filesize
262KB

MD5
6e2201227878e8c95f41af95e7ec0130

SHA1
b0bd08b15c849d36c59d45a1aadfbc60ed39d54b

SHA256
e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040

SHA512
cc9947cac2b669cb5b945b3849205b471726b04626a9c5fa448b6bc6817220a584c6d4dd11a76eca90aa7721bddb8dbeca8387f0864ee8581fa3b09aa19bc694

Download Submit
\Users\Admin\nunos.exe

Filesize
262KB

MD5
6e2201227878e8c95f41af95e7ec0130

SHA1
b0bd08b15c849d36c59d45a1aadfbc60ed39d54b

SHA256
e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040

SHA512
cc9947cac2b669cb5b945b3849205b471726b04626a9c5fa448b6bc6817220a584c6d4dd11a76eca90aa7721bddb8dbeca8387f0864ee8581fa3b09aa19bc694

Download Submit
\Users\Admin\nunos.exe

Filesize
262KB

MD5
6e2201227878e8c95f41af95e7ec0130

SHA1
b0bd08b15c849d36c59d45a1aadfbc60ed39d54b

SHA256
e16af980a80f87d6e36c761e7fb75f8dcd0394beec3926aceb1a5d848db85040

SHA512
cc9947cac2b669cb5b945b3849205b471726b04626a9c5fa448b6bc6817220a584c6d4dd11a76eca90aa7721bddb8dbeca8387f0864ee8581fa3b09aa19bc694

Download Submit
memory/1600-56-0x00000000752B1000-0x00000000752B3000-memory.dmp

Filesize
8KB

Download