e167373801728d455bbf3243b7c576f2fc05192dc9d5c0b91dc840100da59ad6

Analysis

max time kernel
149s
max time network
125s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
10/12/2023, 18:21

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General

Target

Server.exe
Size

43KB
MD5

62e768f23a7ab49b2e263275f1ec3d32
SHA1

79abc6204488b22e4beb5dddab6c84a2c7afc372
SHA256

e167373801728d455bbf3243b7c576f2fc05192dc9d5c0b91dc840100da59ad6
SHA512

9622be1c1efe683372aa0758c0bf41a64494e540b82684b230edda038a2ed5b10c02f4269c86e1f699369dd0440d6a97829a0b16fa1a8365e58d84d848a02e0d
SSDEEP

768:jSXTp8yN83MSaCA/Cr+9WTO2CK58196HsjHvCqvtq1YLsL1/x0NVbK7z/8HCCjP9:0RWfQYklW1p0DHCCrk

Score

8^/10

evasion persistence

Malware Config

Signatures

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2600	netsh.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\42b3f673cf62159e1838e5f9292cb21c.exe	Builder.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\42b3f673cf62159e1838e5f9292cb21c.exe	Builder.exe

Executes dropped EXE 1 IoCs

pid	Process
2620	Builder.exe

Loads dropped DLL 1 IoCs

pid	Process
3000	Server.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3618187007-3650799920-3290345941-1000\Software\Microsoft\Windows\CurrentVersion\Run\42b3f673cf62159e1838e5f9292cb21c = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Builder.exe\" .."	Builder.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\42b3f673cf62159e1838e5f9292cb21c = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Builder.exe\" .."	Builder.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2620	Builder.exe
2620	Builder.exe
2620	Builder.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2620	Builder.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3000 wrote to memory of 2620	3000	Server.exe	28
PID 3000 wrote to memory of 2620	3000	Server.exe	28
PID 3000 wrote to memory of 2620	3000	Server.exe	28
PID 3000 wrote to memory of 2620	3000	Server.exe	28
PID 2620 wrote to memory of 2600	2620	Builder.exe	29
PID 2620 wrote to memory of 2600	2620	Builder.exe	29
PID 2620 wrote to memory of 2600	2620	Builder.exe	29
PID 2620 wrote to memory of 2600	2620	Builder.exe	29

C:\Users\Admin\AppData\Local\Temp\Server.exe
"C:\Users\Admin\AppData\Local\Temp\Server.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3000
- C:\Users\Admin\AppData\Local\Temp\Builder.exe
  "C:\Users\Admin\AppData\Local\Temp\Builder.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2620
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Builder.exe" "Builder.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:2600

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

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\Builder.exe

Filesize
43KB

MD5
62e768f23a7ab49b2e263275f1ec3d32

SHA1
79abc6204488b22e4beb5dddab6c84a2c7afc372

SHA256
e167373801728d455bbf3243b7c576f2fc05192dc9d5c0b91dc840100da59ad6

SHA512
9622be1c1efe683372aa0758c0bf41a64494e540b82684b230edda038a2ed5b10c02f4269c86e1f699369dd0440d6a97829a0b16fa1a8365e58d84d848a02e0d

Download Submit
memory/2620-12-0x0000000000550000-0x0000000000590000-memory.dmp

Filesize
256KB

Download
memory/2620-11-0x0000000074600000-0x0000000074BAB000-memory.dmp

Filesize
5.7MB

Download
memory/2620-14-0x0000000074600000-0x0000000074BAB000-memory.dmp

Filesize
5.7MB

Download
memory/2620-17-0x0000000074600000-0x0000000074BAB000-memory.dmp

Filesize
5.7MB

Download
memory/3000-0-0x0000000074600000-0x0000000074BAB000-memory.dmp

Filesize
5.7MB

Download
memory/3000-1-0x0000000074600000-0x0000000074BAB000-memory.dmp

Filesize
5.7MB

Download
memory/3000-2-0x0000000000A60000-0x0000000000AA0000-memory.dmp

Filesize
256KB

Download
memory/3000-10-0x0000000074600000-0x0000000074BAB000-memory.dmp

Filesize
5.7MB

Download