guloader | 5cba2773587387ad35e187bf5135467da368909ae0d4dd1a0f1d80be6338fc44

General

Target

MC8017774DOCS.exe
Size

553KB
MD5

d4c19e96d83bd586016a3be2e3a57f1d
SHA1

bf5d7271766db9b568ac98006c7eda0de40bc2bd
SHA256

5cba2773587387ad35e187bf5135467da368909ae0d4dd1a0f1d80be6338fc44
SHA512

03078c41d61c02c1f8f7d34c4b93ac4d534a26c4d3dd28c04102d7f10b2eecea6499b38e0a87db0447314b3ca1f097f02d1c7ebd5d3fa994d9708d86df9f9c62
SSDEEP

12288:32EIMY+ov3ZXExuA5lpKHHtmZxxNQicmd3ZhZF:3w9+U36t5lAnoZxbcmdPZF

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

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

Loads dropped DLL 1 IoCs

pid	Process
5072	MC8017774DOCS.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-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MC8017774DOCS.exe
Key opened	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MC8017774DOCS.exe
Key opened	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MC8017774DOCS.exe

Looks up external IP address via web service 1 IoCs

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

flow	ioc
20	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2452	MC8017774DOCS.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5072	MC8017774DOCS.exe
2452	MC8017774DOCS.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5072 set thread context of 2452	5072	MC8017774DOCS.exe	89

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\slnger\barometerstandenes.san	MC8017774DOCS.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 2 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	MC8017774DOCS.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MC8017774DOCS.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2452	MC8017774DOCS.exe
2452	MC8017774DOCS.exe
2452	MC8017774DOCS.exe
2452	MC8017774DOCS.exe
2452	MC8017774DOCS.exe
2452	MC8017774DOCS.exe
2452	MC8017774DOCS.exe
2452	MC8017774DOCS.exe
2452	MC8017774DOCS.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
5072	MC8017774DOCS.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2452	MC8017774DOCS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5072 wrote to memory of 2452	5072	MC8017774DOCS.exe	89
PID 5072 wrote to memory of 2452	5072	MC8017774DOCS.exe	89
PID 5072 wrote to memory of 2452	5072	MC8017774DOCS.exe	89
PID 5072 wrote to memory of 2452	5072	MC8017774DOCS.exe	89
PID 5072 wrote to memory of 2452	5072	MC8017774DOCS.exe	89

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MC8017774DOCS.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MC8017774DOCS.exe

C:\Users\Admin\AppData\Local\Temp\MC8017774DOCS.exe
"C:\Users\Admin\AppData\Local\Temp\MC8017774DOCS.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5072
- C:\Users\Admin\AppData\Local\Temp\MC8017774DOCS.exe
  "C:\Users\Admin\AppData\Local\Temp\MC8017774DOCS.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:2452

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

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsaAD29.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/2452-24-0x0000000036DA0000-0x0000000036F62000-memory.dmp

Filesize
1.8MB

Download
memory/2452-29-0x0000000037D90000-0x0000000037D9A000-memory.dmp

Filesize
40KB

Download
memory/2452-18-0x0000000035E80000-0x0000000035ED0000-memory.dmp

Filesize
320KB

Download
memory/2452-19-0x0000000001660000-0x0000000003B2F000-memory.dmp

Filesize
36.8MB

Download
memory/2452-28-0x0000000037BE0000-0x0000000037C72000-memory.dmp

Filesize
584KB

Download
memory/2452-13-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2452-14-0x0000000001660000-0x0000000003B2F000-memory.dmp

Filesize
36.8MB

Download
memory/2452-15-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2452-26-0x0000000037070000-0x000000003759C000-memory.dmp

Filesize
5.2MB

Download
memory/2452-25-0x0000000036F90000-0x0000000036FE0000-memory.dmp

Filesize
320KB

Download
memory/2452-21-0x00000000365C0000-0x000000003660E000-memory.dmp

Filesize
312KB

Download
memory/2452-20-0x0000000035FD0000-0x0000000036574000-memory.dmp

Filesize
5.6MB

Download
memory/2452-22-0x0000000036610000-0x00000000366AC000-memory.dmp

Filesize
624KB

Download
memory/2452-23-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/5072-8-0x0000000002DF0000-0x00000000052BF000-memory.dmp

Filesize
36.8MB

Download
memory/5072-9-0x0000000077B41000-0x0000000077C61000-memory.dmp

Filesize
1.1MB

Download
memory/5072-10-0x0000000002DF0000-0x00000000052BF000-memory.dmp

Filesize
36.8MB

Download
memory/5072-12-0x0000000002DF0000-0x00000000052BF000-memory.dmp

Filesize
36.8MB

Download
memory/5072-11-0x0000000074834000-0x0000000074835000-memory.dmp

Filesize
4KB

Download

Analysis

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