duptwux | 8c99fa8d6046d4e280525881e86f09dbab16de9289eb00dc294fbd6a217e2b5b

General

Target
jaffacakes118_Worm.Win32.Juched.fja.exe
Size 280KB
Sample261015-2fdcnset6j
SHA256 8c99fa8d6046d4e280525881e86f09dbab16de9289eb00dc294fbd6a217e2b5b
MD5 f19536645565a6c2e60dbc46cbe6e88a
SHA1 1c58b8e00be42b73f2f5ab395804dc5d1305e55c
SHA512 5b973d232effbb0eb3c18ed9a530688f36cb428405087bd3ef0ad45bbc9671f91179d03df3ca208cbfd6450e28cc0e6536cf5f983b7a011242203bc32f9f9b28
SSDEEP 1536:fwQBHvoYUWjzlZLX0T0mSBAgaIetc8DdXoaQ1:fBlvaWjzrLX0gmSBAVIetfXoaW
TLSH
T121543B31F201C07BF4D141BEC2DA8B76B5AC5F311B4420E7D3D0B9AD663A6E9B93158A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery duptwux worm

Malware Config

Signatures

Family: Duptwux
Duptwux is a Windows worm written in C++.
worm duptwux

Detects Duptwux 5 IoCs

resource	yara_rule
behavioral1/memory/4200-0-0x0000000000400000-0x0000000000458000-memory.dmp	family_duptwux
behavioral1/files/0x000300000001e6f4-6.dat	family_duptwux
behavioral1/memory/4132-11-0x0000000000400000-0x0000000000458000-memory.dmp	family_duptwux
behavioral1/memory/4200-12-0x0000000000400000-0x0000000000458000-memory.dmp	family_duptwux
behavioral1/memory/4132-14-0x0000000000400000-0x0000000000458000-memory.dmp	family_duptwux

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000\Control Panel\International\Geo\Nation	jaffacakes118_Worm.Win32.Juched.fja.exe

Executes dropped EXE 1 IoCs

pid	Process
4132	jusched.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\3f9d78ca\3f9d78ca	jaffacakes118_Worm.Win32.Juched.fja.exe
File created	C:\Program Files (x86)\3f9d78ca\jusched.exe	jaffacakes118_Worm.Win32.Juched.fja.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\2tdU3eap.job	jaffacakes118_Worm.Win32.Juched.fja.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4680	4200	WerFault.exe	86
3344	4200	WerFault.exe	86

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	jusched.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	jusched.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	jaffacakes118_Worm.Win32.Juched.fja.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jusched.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 4200 wrote to memory of 4132	4200	jaffacakes118_Worm.Win32.Juched.fja.exe	93

C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Worm.Win32.Juched.fja.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Worm.Win32.Juched.fja.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4200
- C:\Program Files (x86)\3f9d78ca\jusched.exe
  "C:\Program Files (x86)\3f9d78ca\jusched.exe"
  2⤵
  - Executes dropped EXE
  - Reads the TCP/IP host and domain name from the registry
  - System Location Discovery: System Language Discovery
  PID:4132
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4200 -s 1136
  2⤵
  - Program crash
  PID:4680
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4200 -s 1156
  2⤵
  - Program crash
  PID:3344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4200 -ip 4200
1⤵
PID:2000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4200 -ip 4200
1⤵
PID:4624

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

3f9d78ca

Path C:\Program Files (x86)\3f9d78ca\3f9d78ca
Size 17B
SHA256 3506e286f6223ccaf1665d4e457b712abeb527266ff28327ce60e37b9fbeb404
MD5 2130fee70fc3f7c10d5279f96f98ad1e
SHA1 4307cef89171fa230048ea22546802198d888780
SHA512 67fa1bb31028ff3ba125f184207499b9205f58c9eef2ac948f5824475515c396b3d5f93e207cb96deffe1aedb286b1f935cc689c5d84449e51c517da1cffe2e5
MD5 SHA1 SHA512

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jusched.exe

Path C:\Program Files (x86)\3f9d78ca\jusched.exe
Size 280KB
SHA256 56bea7a22c779273ae2dac8d49d25dacd20c823a73b94954330b3229062a4340
MD5 e702d76e042d21ae2025232e155a4033
SHA1 c26446a076d8db80a3b3b820ea54f9f1d10af607
SHA512 8a087f2ae91decd402966c3515d340a33871e17ab944badda41178936eba00e33de18d132ca2d541ecfb32e96775e9c42f5228ff004eea1afaf9b07cdb4b9200
SSDEEP 1536:fwQBHvoYUWjzlZLX0T0mSBAgaIetc8DdXoQQu:fBlvaWjzrLX0gmSBAVIetfXoQ7
TLSH
T184543B31F201C07AF4D141BEC2DA8B76B5AC5F311B4420E7D3D0B9AD673A6E9B93158A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4132-11-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/4132-14-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/4200-0-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/4200-12-0x0000000000400000-0x0000000000458000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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