upatre | 400f49be330b4d306dae126ba7e2e38fcc16db06ab993954f534671c1e3cdf4d

Resubmissions

23-09-2024 08:10

240923-j2xpbszeqn 10

24-07-2024 04:06

240724-epgp5axdml 10

Analysis

max time kernel
149s
max time network
134s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
23-09-2024 08:10

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General

Target

476dc6541b905124ce8805d5bc7a7b70N.exe
Size

39KB
MD5

476dc6541b905124ce8805d5bc7a7b70
SHA1

1d03a35c1800c758472bd62181bc4ee338fa7ede
SHA256

400f49be330b4d306dae126ba7e2e38fcc16db06ab993954f534671c1e3cdf4d
SHA512

8c704628f506dd98f6c2eb3dc201269c3e8d322a25ceb1b461b58f313747c73c8bff6fa304e562b4b2809cb8eecdb9b3dfd395afd95847e1c9cb74d1e91c6570
SSDEEP

768:xb6ia+xAURMDKRji3x/o7vMjR1RFzVETB:ZraCWDKU8+u

Score

10^/10

upatre discovery downloader

Malware Config

Signatures

Upatre
Upatre is a generic malware downloader.
downloader upatre

Executes dropped EXE 1 IoCs

pid	Process
4384	szgfw.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	476dc6541b905124ce8805d5bc7a7b70N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	szgfw.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000_Classes\Local Settings	OpenWith.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
4596	NOTEPAD.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2860	OpenWith.exe

Suspicious use of SetWindowsHookEx 23 IoCs

pid	Process
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe
2860	OpenWith.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4912 wrote to memory of 4384	4912	476dc6541b905124ce8805d5bc7a7b70N.exe	72
PID 4912 wrote to memory of 4384	4912	476dc6541b905124ce8805d5bc7a7b70N.exe	72
PID 4912 wrote to memory of 4384	4912	476dc6541b905124ce8805d5bc7a7b70N.exe	72
PID 2860 wrote to memory of 4596	2860	OpenWith.exe	74
PID 2860 wrote to memory of 4596	2860	OpenWith.exe	74

C:\Users\Admin\AppData\Local\Temp\476dc6541b905124ce8805d5bc7a7b70N.exe
"C:\Users\Admin\AppData\Local\Temp\476dc6541b905124ce8805d5bc7a7b70N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4912
- C:\Users\Admin\AppData\Local\Temp\szgfw.exe
  "C:\Users\Admin\AppData\Local\Temp\szgfw.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4384

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2860
- C:\Windows\system32\NOTEPAD.EXE
  "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\UpdateAssert.pcx
  2⤵
  - Opens file in notepad (likely ransom note)
  PID:4596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\szgfw.exe

Filesize
39KB

MD5
a9abd17aee1c80688ef60e6d3c90c0d7

SHA1
378e6f393aeb5a525551b4323994b7693b4c650b

SHA256
4de1250bd67c3830c1ee90946a704bf8970c2cafc41e060fbb949a93fdd78b7d

SHA512
8f1862f4ead7648afb974eb0f738c9f58389032d4c0071251f0e3b232e015f3620745a63dda98f5890424f5f1630fe61cc4c41c8259767e9433bb401fcaab3ee

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