39e1e785dba794df0aed87f61d65c8075d35700c049db60734b9b4fef59974c8

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
29/01/2024, 15:42

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

8038f55897b6cd309aeb0040e10d485e.exe
Size

70KB
MD5

8038f55897b6cd309aeb0040e10d485e
SHA1

5bc3252533039123260e3545d6f371c9158f1d13
SHA256

39e1e785dba794df0aed87f61d65c8075d35700c049db60734b9b4fef59974c8
SHA512

3fc3344dac3327bc0daf0d40125ba6a46f76f41f26a2fd6c568d3a302556586d588d56dc04cd61b69e96450c234de7ea7dbf353015d9206f98e6dea2d7ad48fc
SSDEEP

768:JC2MhfX7+s82cykJqG8Ov5yQcbJ2UbNkbVXWSmqSj8C1HcGh5ngCaqWiNJqauMc:mhfdxcjJqyv5jcdnbCbYGSj8Rsn/Jq0c

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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	8038f55897b6cd309aeb0040e10d485e.exe

Executes dropped EXE 2 IoCs

pid	Process
840	pcb_build_111_smtp.exe
4540	svchost.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-1-5-21-983843758-932321429-1636175382-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\KB248401.exe = "\"C:\\Users\\Admin\\AppData\\Roaming\\KB248401.exe\""	pcb_build_111_smtp.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\pcb_build_111_smtp.exe	8038f55897b6cd309aeb0040e10d485e.exe

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1280	8038f55897b6cd309aeb0040e10d485e.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1280 wrote to memory of 840	1280	8038f55897b6cd309aeb0040e10d485e.exe	83
PID 1280 wrote to memory of 840	1280	8038f55897b6cd309aeb0040e10d485e.exe	83
PID 1280 wrote to memory of 840	1280	8038f55897b6cd309aeb0040e10d485e.exe	83
PID 840 wrote to memory of 4540	840	pcb_build_111_smtp.exe	84
PID 840 wrote to memory of 4540	840	pcb_build_111_smtp.exe	84
PID 840 wrote to memory of 4540	840	pcb_build_111_smtp.exe	84

C:\Users\Admin\AppData\Local\Temp\8038f55897b6cd309aeb0040e10d485e.exe
"C:\Users\Admin\AppData\Local\Temp\8038f55897b6cd309aeb0040e10d485e.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1280
- C:\Windows\pcb_build_111_smtp.exe
  "C:\Windows\pcb_build_111_smtp.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:840
- - C:\Users\Admin\AppData\Local\Temp\svchost.exe
    C:\Users\Admin\AppData\Local\Temp\\svchost.exe
    3⤵
    - Executes dropped EXE
    PID:4540

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

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\pcb_build_111_smtp.exe

Filesize
9KB

MD5
0d5a4f8fa9ab1d733c548bd5a4f8c949

SHA1
459d6268b35f6ae6ae042f71e2660479aa294a3e

SHA256
f7c1093f83be46a14f06431c7092160087bf85eadba2deda1283593d94879dbd

SHA512
389cd5cc6478194e39c5a09cc5d4226361551373371dbe7a84ef57e55b538e4a1671a395c73bcb723d3e5badf2b9e680ca77323b57ac3226475015dfd719361f

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads