3f92727f848a29c670f1239d30bc34284a407b21d5b9edf03c3d54ad77c31da9

Analysis

max time kernel
21s
max time network
100s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
21-09-2024 20:08

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

3f92727f848a29c670f1239d30bc34284a407b21d5b9edf03c3d54ad77c31da9.exe
Size

72KB
MD5

bdd9f346740327b9f2e3ab702a20fff0
SHA1

f33aaec26a1d492b6ab95423a788b122f8f87ed7
SHA256

3f92727f848a29c670f1239d30bc34284a407b21d5b9edf03c3d54ad77c31da9
SHA512

292083eaa3ea13a81b5213115a649d6adf557ad5114a9b58b0b8994a9fc6df5cc551a7316aa7e6c46c08abaa903493c3215d89c15011747796ac8b44d462c091
SSDEEP

1536:pZBt3IQ2JkqDFNLIKc0u4VqrMZWXABAdY9:rf3IVDHBj9

Score

10^/10

discovery evasion persistence

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	kuosif.exe

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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	3f92727f848a29c670f1239d30bc34284a407b21d5b9edf03c3d54ad77c31da9.exe

Executes dropped EXE 1 IoCs

pid	Process
3864	kuosif.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kuosif = "C:\\Users\\Admin\\kuosif.exe"	kuosif.exe

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

System Information Discovery
T1082

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	3f92727f848a29c670f1239d30bc34284a407b21d5b9edf03c3d54ad77c31da9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kuosif.exe

Suspicious behavior: EnumeratesProcesses 40 IoCs

pid	Process
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe
3864	kuosif.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
220	3f92727f848a29c670f1239d30bc34284a407b21d5b9edf03c3d54ad77c31da9.exe
3864	kuosif.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 220 wrote to memory of 3864	220	3f92727f848a29c670f1239d30bc34284a407b21d5b9edf03c3d54ad77c31da9.exe	86
PID 220 wrote to memory of 3864	220	3f92727f848a29c670f1239d30bc34284a407b21d5b9edf03c3d54ad77c31da9.exe	86
PID 220 wrote to memory of 3864	220	3f92727f848a29c670f1239d30bc34284a407b21d5b9edf03c3d54ad77c31da9.exe	86
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81
PID 3864 wrote to memory of 220	3864	kuosif.exe	81

C:\Users\Admin\AppData\Local\Temp\3f92727f848a29c670f1239d30bc34284a407b21d5b9edf03c3d54ad77c31da9.exe
"C:\Users\Admin\AppData\Local\Temp\3f92727f848a29c670f1239d30bc34284a407b21d5b9edf03c3d54ad77c31da9.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:220
- C:\Users\Admin\kuosif.exe
  "C:\Users\Admin\kuosif.exe"
  2⤵
  - Modifies visiblity of hidden/system files in Explorer
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3864

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\kuosif.exe

Filesize
72KB

MD5
2ad6da44f5814cb52e61dc0d86d33d24

SHA1
57e98584b782eb09c6c80e07112a64d68134ac3f

SHA256
2576a97cf1d1ea64db561eaf67145086d5d53b2e8cb0d5cc73f30ebd11550f27

SHA512
82226ea56bb20b4d511fdc2d17790893022da8f1c6e8bef8b7f04ad50cf92ab02bcf2ddd158d7d3dbe179e419cc4cb11a49a9a746da538a328de6c17a7514af6

Download Submit