2aadd362cc57f8de2cd44508a018bfa5fc8b32a111b839c23a1391ba04242c7b

General

Target

Opt1cal/opticall.exe
Size

135KB
MD5

a4d5b6e62c6680258975955d62f22934
SHA1

dec6491fa13f244c4d72fb72a9bd511fd7984fc3
SHA256

bbd6c1bd5eac67e9d5d210ec4e2f686336c43bc4176b491b80e3fb692c21572a
SHA512

6997b90015a032859a643323503c3d77404569e4f8153fea3e9f2f95d8ff40e69d605849f36996381acadc91651a1e299ea7f9ce7723cdabdbe5df28362856c4
SSDEEP

3072:WjK4UGDHXrQ8hy7qgpHulWD9ZvZ5Pf3Ca10xuZ04ntfOKhBuH:WjK4TDUqgpqWDLZ5H+xuZ04thA

Score

7^/10

execution

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1536	opticaI.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
1	raw.githubusercontent.com
3	raw.githubusercontent.com
5	raw.githubusercontent.com

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3476	powershell.exe

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

System Information Discovery
T1082

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	opticaI.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	opticaI.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemVersion	opticaI.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4018527317-446799424-2810249686-1000\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\opticaI.exe = "11001"	opticaI.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3476	powershell.exe
3476	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3476	powershell.exe
Token: SeDebugPrivilege	4308	opticall.exe
Token: SeDebugPrivilege	1536	opticaI.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1536	opticaI.exe
1536	opticaI.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4308 wrote to memory of 3476	4308	opticall.exe	82
PID 4308 wrote to memory of 3476	4308	opticall.exe	82
PID 4308 wrote to memory of 1536	4308	opticall.exe	84
PID 4308 wrote to memory of 1536	4308	opticall.exe	84

C:\Users\Admin\AppData\Local\Temp\Opt1cal\opticall.exe
"C:\Users\Admin\AppData\Local\Temp\Opt1cal\opticall.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4308
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -command "Expand-Archive -Path 'C:\Users\Admin\AppData\Local\Temp\Opt1cal\Opt1cal.zip' -DestinationPath 'C:\Users\Admin\AppData\Local\Temp\Opt1cal'"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3476
- C:\Users\Admin\AppData\Local\Temp\Opt1cal\Opt1cal\opticaI.exe
  "C:\Users\Admin\AppData\Local\Temp\Opt1cal\Opt1cal\opticaI.exe"
  2⤵
  - Executes dropped EXE
  - Enumerates system info in registry
  - Modifies Internet Explorer settings
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1536

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3256

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Opt1cal\Opt1cal.zip

Filesize
5.7MB

MD5
6b46ea15123bc7409628ebcd84e27892

SHA1
862a59333cb2581ea6ee68456798d74073ff79b3

SHA256
19d57492013f884fb9dbba391f62b57226c8e3ea6bb73e523cbd880cfab3ba44

SHA512
27a4692612b18b03b94653c601f5ab5911f42bb51c181639d430bb6cf3d60aa9e986f9c727e5b9fa5e9c69376e389dbca833c8efc3b348c6cd2302eee3799571

Download Submit
C:\Users\Admin\AppData\Local\Temp\Opt1cal\Opt1cal\Guna.UI2.dll

Filesize
2.1MB

MD5
c97f23b52087cfa97985f784ea83498f

SHA1
d364618bec9cd6f8f5d4c24d3cc0f4c1a8e06b89

SHA256
e658e8a5616245dbe655e194b59f1bb704aaeafbd0925d6eebbe70555a638cdd

SHA512
ecfa83596f99afde9758d1142ff8b510a090cba6f42ba6fda8ca5e0520b658943ad85829a07bf17411e26e58432b74f05356f7eaeb3949a8834faa5de1a4f512

Download Submit
C:\Users\Admin\AppData\Local\Temp\Opt1cal\Opt1cal\opticaI.exe

Filesize
260KB

MD5
ba964fad1475750de461a7a89c6d7e6c

SHA1
e43bbaa3365a633e1a774d67b07bde95fbdca91e

SHA256
84b32fb281f5907de144f115c27dd244b1fc8d9d71a185db08cfcb0915f49239

SHA512
5d9755584e8312c74a067a8bd93fb42136d60e0282d1bee00b870fca755c044c6471990c7f834e3de3c821ba16062d9df607e018aa6c35bf11ff739be8b5dcb7

Download Submit
C:\Users\Admin\AppData\Local\Temp\Opt1cal\Opt1cal\opticaI.exe.config

Filesize
187B

MD5
15c8c4ba1aa574c0c00fd45bb9cce1ab

SHA1
0dad65a3d4e9080fa29c42aa485c6102d2fa8bc8

SHA256
f82338e8e9c746b5d95cd2ccc7bf94dd5de2b9b8982fffddf2118e475de50e15

SHA512
52baac63399340427b94bfdeb7a42186d5359ce439c3d775497f347089edfbf72a6637b23bb008ab55b8d4dd3b79a7b2eb7c7ef922ea23d0716d5c3536b359d4

Download Submit
C:\Users\Admin\AppData\Local\Temp\Opt1cal\opt1cal\workspace\.tests\isfile.txt

Filesize
7B

MD5
260ca9dd8a4577fc00b7bd5810298076

SHA1
53a5687cb26dc41f2ab4033e97e13adefd3740d6

SHA256
aee408847d35e44e99430f0979c3357b85fe8dbb4535a494301198adbee85f27

SHA512
51e85deb51c2b909a21ec5b8e83b1cb28da258b1be227620105a345a2bd4c6aea549cd5429670f2df33324667b9f623a420b3a0bdbbd03ad48602211e75478a7

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_c4fjcvh1.0id.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1536-219-0x00000199D6AE0000-0x00000199D6B26000-memory.dmp

Filesize
280KB

Download
memory/1536-221-0x00000199F1530000-0x00000199F1742000-memory.dmp

Filesize
2.1MB

Download
memory/3476-12-0x00007FFD5A8F0000-0x00007FFD5B3B2000-memory.dmp

Filesize
10.8MB

Download
memory/3476-13-0x00007FFD5A8F0000-0x00007FFD5B3B2000-memory.dmp

Filesize
10.8MB

Download
memory/3476-14-0x0000012FF1C20000-0x0000012FF1C32000-memory.dmp

Filesize
72KB

Download
memory/3476-15-0x0000012FF1B80000-0x0000012FF1B8A000-memory.dmp

Filesize
40KB

Download
memory/3476-10-0x0000012FF1BB0000-0x0000012FF1BD2000-memory.dmp

Filesize
136KB

Download
memory/3476-215-0x00007FFD5A8F0000-0x00007FFD5B3B2000-memory.dmp

Filesize
10.8MB

Download
memory/3476-11-0x00007FFD5A8F0000-0x00007FFD5B3B2000-memory.dmp

Filesize
10.8MB

Download
memory/3476-1-0x00007FFD5A8F3000-0x00007FFD5A8F5000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing