79f861b4fd1e2aa68123d26fd549dab1a464469f6be98e708154afb50cdbc36e

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/12/2023, 17:32

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General

Target

311f210d67f1aa950a31e4214389f3e9.exe
Size

112KB
MD5

311f210d67f1aa950a31e4214389f3e9
SHA1

fc5b1b06cc65a4a68f1a2b5a3e5fff47a75654eb
SHA256

79f861b4fd1e2aa68123d26fd549dab1a464469f6be98e708154afb50cdbc36e
SHA512

8dca5b3335cb4b9ef4f374d7cf487d35e0b256db2b95f6e2b7c4f0b3ac2eb9ef971568edbc698545734849b2ccefafff78df52f487d926094b24a1c709fc55f3
SSDEEP

1536:fMg3p/KEL0mrcYRiiVhOuc8JxzzsQIgpaBHRylpus852FK/MrHoFmqckUy:fX//0m4+quc8JZzhIgpwo6sr2FTck

Score

7^/10

persistence

Malware Config

Signatures

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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	311f210d67f1aa950a31e4214389f3e9.exe

Executes dropped EXE 1 IoCs

pid	Process
3356	Rundll.exe

Modifies system executable filetype association 2 TTPs 2 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	311f210d67f1aa950a31e4214389f3e9.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\Rundll.exe \"%1\" %*"	311f210d67f1aa950a31e4214389f3e9.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Rundll.exe	311f210d67f1aa950a31e4214389f3e9.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
804	3356	WerFault.exe	31

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	311f210d67f1aa950a31e4214389f3e9.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\Rundll.exe \"%1\" %*"	311f210d67f1aa950a31e4214389f3e9.exe
Key created	\REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000_Classes\Local Settings	311f210d67f1aa950a31e4214389f3e9.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4376	311f210d67f1aa950a31e4214389f3e9.exe
3356	Rundll.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4376 wrote to memory of 3356	4376	311f210d67f1aa950a31e4214389f3e9.exe	31
PID 4376 wrote to memory of 3356	4376	311f210d67f1aa950a31e4214389f3e9.exe	31
PID 4376 wrote to memory of 3356	4376	311f210d67f1aa950a31e4214389f3e9.exe	31

C:\Users\Admin\AppData\Local\Temp\311f210d67f1aa950a31e4214389f3e9.exe
"C:\Users\Admin\AppData\Local\Temp\311f210d67f1aa950a31e4214389f3e9.exe"
1⤵
- Checks computer location settings
- Modifies system executable filetype association
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4376
- C:\Windows\SysWOW64\Rundll.exe
  "C:\Windows\SysWow64\Rundll.exe" "C:\Users\Admin\AppData\Local\Temp\311f210d67f1aa950a31e4214389f3e9.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:3356
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3356 -s 468
    3⤵
    - Program crash
    PID:804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3356 -ip 3356
1⤵
PID:640

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Privilege Escalation

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\Rundll.exe

Filesize
23KB

MD5
b09573fd2d5c40c6396bc74f094855c9

SHA1
1b4e9a91576d1d094bb8a563575934df03887f1f

SHA256
c29c51c25e4833c5986f8af228f6615fcdfe5b51a83c779c6d233ce77c7f0cfb

SHA512
e45e908f6516817c628d39600c678f1e61bc5dd639c3bf8d676ae3092d97646dca27a345739d6e0ffa59478218408df8e3672320c75a662a506b404fb96d6cc8

Download Submit
memory/3356-12-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/4376-11-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads