guloader | f1b6f735c651a28ecb97d4b9e21adc5d79ebed5b2686482f58ae33df3f13492d

General

Target

Cubistic.exe
Size

744KB
MD5

615dbc6bbf1babd9d064ec9d24b211b1
SHA1

5465ddcd9aa36db67f3a29607f86c4df6989d026
SHA256

f1b6f735c651a28ecb97d4b9e21adc5d79ebed5b2686482f58ae33df3f13492d
SHA512

3a0d4769020d220676907a71d8fea5e2d61ca2e6d3ae79be14a7b4b5a99c78b03c044619e3c55c8a1e76f660cee26638932fd846ec580f8ad72b551d41cfdb04
SSDEEP

12288:lF9eqV6zZSsoOa/xy38SeD83S1vKZbXvOIxnE8UML789zUO9vVOI0emBmf:Zx6SsoOa/A3lRsUbbxnlGUOdb0emBmf

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot7618867847:AAF14vnGvkJJYcxLyMVdR3OZPzd4TQzD_OY/sendMessage?chat_id=6070006284

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
VIPKeylogger
VIPKeylogger is a keylogger and infostealer written in C# and it resembles SnakeKeylogger that was found in 2020.
stealer keylogger vipkeylogger
Vipkeylogger family
vipkeylogger

Downloads MZ/PE file 1 IoCs

flow	pid	Process
52	4640	Process not Found

Loads dropped DLL 2 IoCs

pid	Process
2560	Cubistic.exe
2560	Cubistic.exe

Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3296967594-3563063956-581523229-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Cubistic.exe
Key opened	\REGISTRY\USER\S-1-5-21-3296967594-3563063956-581523229-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Cubistic.exe
Key opened	\REGISTRY\USER\S-1-5-21-3296967594-3563063956-581523229-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Cubistic.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
15	drive.google.com
17	drive.google.com

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
29	checkip.dyndns.org
32	reallyfreegeoip.org
33	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3020	Cubistic.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2560	Cubistic.exe
3020	Cubistic.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\rhesusbarnet\teenfully.bra	Cubistic.exe
File opened for modification	C:\Program Files (x86)\Common Files\infarkt.pla	Cubistic.exe
File opened for modification	C:\Program Files (x86)\Unelaborated.non	Cubistic.exe
File opened for modification	C:\Program Files (x86)\Common Files\bedvelsens\Reaccelerates.ske	Cubistic.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\rothesay\Fallenternes.con	Cubistic.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
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 3 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	Cubistic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Cubistic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2228	MicrosoftEdgeUpdate.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3020	Cubistic.exe
3020	Cubistic.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2560	Cubistic.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3020	Cubistic.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2560 wrote to memory of 3020	2560	Cubistic.exe	92
PID 2560 wrote to memory of 3020	2560	Cubistic.exe	92
PID 2560 wrote to memory of 3020	2560	Cubistic.exe	92
PID 2560 wrote to memory of 3020	2560	Cubistic.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3296967594-3563063956-581523229-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Cubistic.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3296967594-3563063956-581523229-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Cubistic.exe

C:\Users\Admin\AppData\Local\Temp\Cubistic.exe
"C:\Users\Admin\AppData\Local\Temp\Cubistic.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2560
- C:\Users\Admin\AppData\Local\Temp\Cubistic.exe
  "C:\Users\Admin\AppData\Local\Temp\Cubistic.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:3020

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIyIiBpbnN0YWxsZGF0ZXRpbWU9IjE3MzkyODIxNjkiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4Mzc1MzE4NTEwMTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI0OTI2NjI3MjM2Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:2228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Browser Information Discovery

1

T1217

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nso6A63.tmp\System.dll

Filesize
11KB

MD5
cf85183b87314359488b850f9e97a698

SHA1
6b6c790037eec7ebea4d05590359cb4473f19aea

SHA256
3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac

SHA512
fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

Download Submit
C:\Users\Public\Pictures\fedtlderstvles.lnk

Filesize
932B

MD5
f320ae7bdf8c34a338e531b681e7d6bb

SHA1
dae4bb9c19e74bf74a9323c8530dd444f5bd8e78

SHA256
8a90bd685e6c585e1c9fe7af68a5c24379db96b5b3afdc892470b2a25b079dea

SHA512
56e7682d6e2c42be22a3c9270aea0ade61fafe639d191c191c5fc2582a4b78e5447c1991431af81dd858a6278d11fabb900933f089b4fb4f8c81c101420a53cc

Download Submit
memory/2560-309-0x0000000002930000-0x000000000480E000-memory.dmp

Filesize
30.9MB

Download
memory/2560-310-0x0000000077B01000-0x0000000077C21000-memory.dmp

Filesize
1.1MB

Download
memory/2560-311-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/2560-313-0x0000000002930000-0x000000000480E000-memory.dmp

Filesize
30.9MB

Download
memory/2560-314-0x0000000002930000-0x000000000480E000-memory.dmp

Filesize
30.9MB

Download
memory/3020-318-0x0000000077BA5000-0x0000000077BA6000-memory.dmp

Filesize
4KB

Download
memory/3020-335-0x0000000000460000-0x00000000004AA000-memory.dmp

Filesize
296KB

Download
memory/3020-317-0x00000000016C0000-0x000000000359E000-memory.dmp

Filesize
30.9MB

Download
memory/3020-315-0x00000000016C0000-0x000000000359E000-memory.dmp

Filesize
30.9MB

Download
memory/3020-322-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3020-329-0x0000000077B01000-0x0000000077C21000-memory.dmp

Filesize
1.1MB

Download
memory/3020-333-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3020-316-0x0000000077B88000-0x0000000077B89000-memory.dmp

Filesize
4KB

Download
memory/3020-334-0x00000000016C0000-0x000000000359E000-memory.dmp

Filesize
30.9MB

Download
memory/3020-336-0x00000000362B0000-0x0000000036854000-memory.dmp

Filesize
5.6MB

Download
memory/3020-337-0x00000000368A0000-0x000000003693C000-memory.dmp

Filesize
624KB

Download
memory/3020-341-0x0000000036EF0000-0x00000000370B2000-memory.dmp

Filesize
1.8MB

Download
memory/3020-342-0x00000000370E0000-0x0000000037130000-memory.dmp

Filesize
320KB

Download
memory/3020-343-0x00000000371C0000-0x00000000376EC000-memory.dmp

Filesize
5.2MB

Download
memory/3020-345-0x0000000033C20000-0x0000000033CB2000-memory.dmp

Filesize
584KB

Download
memory/3020-346-0x0000000033CE0000-0x0000000033CEA000-memory.dmp

Filesize
40KB

Download

Analysis

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