guloader | 138a36795ca9c61518ddb0b7ecb1ddcb91ea1903902e34cac726fad3ba34cd6c

General

Target

56782432-PDF.exe
Size

950KB
MD5

8f9400d7a210e0a2cf2a41d15de8fd6b
SHA1

d924e0d9aff0c1b05503471f1e736d486dee3c38
SHA256

138a36795ca9c61518ddb0b7ecb1ddcb91ea1903902e34cac726fad3ba34cd6c
SHA512

fff5eeb5834e8eac393483f962b1957e2bfb21f2fa3de425fe89fac63e6125e1a9fad5921fb5753f4117318781c5f5bf61673294160d248ccb919150280ddd4d
SSDEEP

24576:8s2NlX6adX9pJMOKpfWmVRpkVoJfCMoU8Z1A4:glX6aR9QJW8lCLU8ZC4

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot7820268445:AAEZfSmLuus_dNt5ZwkUPVcXMdXXvZqhlMU/sendMessage?chat_id=8015582084

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
58	4908	Process not Found

Loads dropped DLL 6 IoCs

pid	Process
1620	56782432-PDF.exe
1620	56782432-PDF.exe
1620	56782432-PDF.exe
1620	56782432-PDF.exe
1620	56782432-PDF.exe
1620	56782432-PDF.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-1-5-21-2573923862-3221519550-2669654151-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	56782432-PDF.exe
Key opened	\REGISTRY\USER\S-1-5-21-2573923862-3221519550-2669654151-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	56782432-PDF.exe
Key opened	\REGISTRY\USER\S-1-5-21-2573923862-3221519550-2669654151-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	56782432-PDF.exe

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

Web Service

T1102

flow	ioc
10	drive.google.com
11	drive.google.com
23	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
33	checkip.dyndns.org
35	reallyfreegeoip.org
36	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
432	56782432-PDF.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1620	56782432-PDF.exe
432	56782432-PDF.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	56782432-PDF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	56782432-PDF.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
1856	MicrosoftEdgeUpdate.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
432	56782432-PDF.exe
432	56782432-PDF.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1620	56782432-PDF.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	432	56782432-PDF.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1620 wrote to memory of 432	1620	56782432-PDF.exe	89
PID 1620 wrote to memory of 432	1620	56782432-PDF.exe	89
PID 1620 wrote to memory of 432	1620	56782432-PDF.exe	89
PID 1620 wrote to memory of 432	1620	56782432-PDF.exe	89

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2573923862-3221519550-2669654151-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	56782432-PDF.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2573923862-3221519550-2669654151-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	56782432-PDF.exe

C:\Users\Admin\AppData\Local\Temp\56782432-PDF.exe
"C:\Users\Admin\AppData\Local\Temp\56782432-PDF.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Users\Admin\AppData\Local\Temp\56782432-PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\56782432-PDF.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:432

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIzIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU4MTUiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODE1MzQzMTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1Mjg3MTU2OTExIi8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:1856

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\furriery.ini

Filesize
38B

MD5
b1ef763e50c5aabcdf24507256cdecb5

SHA1
544323e0812a2d71bc5e156e42bbe25f6082afab

SHA256
65724906ac58f577bd6b805237a1d03107bd94276121ef81e1fbfd368672abb4

SHA512
71c29b23cc8d2f16bb9f4667d25a7d01cf593134425359fc735c6056d154addb113dce0a9899f90d0dac4b3e46a3849fdee9190f3bf067fdba3b89f5b1170c67

Download Submit
C:\Users\Admin\AppData\Local\Temp\nswBDB3.tmp\LangDLL.dll

Filesize
5KB

MD5
b21a3377e66b941df6d5b7cf8ba7a43a

SHA1
e7ed27fce2db9cdc11ca3c640806731dcef3864a

SHA256
ba46a03088f690ce966043f49761ff3a3a0dca236160794de841dfecc3588d1e

SHA512
f011a824c0ff7f87c6da112898f4afc87e12c5b39fb40ffcc0955012e79a4302597d892224b3b47e8143480605c73275d3799d6d2000cdf179c2912241f86916

Download Submit
C:\Users\Admin\AppData\Local\Temp\nswBDB3.tmp\System.dll

Filesize
12KB

MD5
792b6f86e296d3904285b2bf67ccd7e0

SHA1
966b16f84697552747e0ddd19a4ba8ab5083af31

SHA256
c7a20bcaa0197aedddc8e4797bbb33fdf70d980f5e83c203d148121c2106d917

SHA512
97edc3410b88ca31abc0af0324258d2b59127047810947d0fb5e7e12957db34d206ffd70a0456add3a26b0546643ff0234124b08423c2c9ffe9bdec6eb210f2c

Download Submit
memory/432-78-0x0000000035A60000-0x0000000035AFC000-memory.dmp

Filesize
624KB

Download
memory/432-74-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/432-87-0x0000000033500000-0x000000003350A000-memory.dmp

Filesize
40KB

Download
memory/432-86-0x0000000033440000-0x00000000334D2000-memory.dmp

Filesize
584KB

Download
memory/432-84-0x00000000368A0000-0x0000000036DCC000-memory.dmp

Filesize
5.2MB

Download
memory/432-53-0x00000000016C0000-0x0000000002C76000-memory.dmp

Filesize
21.7MB

Download
memory/432-54-0x0000000077238000-0x0000000077239000-memory.dmp

Filesize
4KB

Download
memory/432-55-0x0000000077255000-0x0000000077256000-memory.dmp

Filesize
4KB

Download
memory/432-56-0x00000000016C0000-0x0000000002C76000-memory.dmp

Filesize
21.7MB

Download
memory/432-58-0x00000000771B1000-0x00000000772D1000-memory.dmp

Filesize
1.1MB

Download
memory/432-57-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/432-83-0x0000000035BF0000-0x0000000035C40000-memory.dmp

Filesize
320KB

Download
memory/432-75-0x00000000016C0000-0x0000000002C76000-memory.dmp

Filesize
21.7MB

Download
memory/432-76-0x0000000000460000-0x00000000004AA000-memory.dmp

Filesize
296KB

Download
memory/432-77-0x0000000035C50000-0x00000000361F4000-memory.dmp

Filesize
5.6MB

Download
memory/432-82-0x0000000036640000-0x0000000036802000-memory.dmp

Filesize
1.8MB

Download
memory/1620-47-0x00000000048D0000-0x0000000005E86000-memory.dmp

Filesize
21.7MB

Download
memory/1620-48-0x00000000771B1000-0x00000000772D1000-memory.dmp

Filesize
1.1MB

Download
memory/1620-52-0x00000000048D0000-0x0000000005E86000-memory.dmp

Filesize
21.7MB

Download
memory/1620-50-0x00000000048D0000-0x0000000005E86000-memory.dmp

Filesize
21.7MB

Download
memory/1620-49-0x00000000738D5000-0x00000000738D6000-memory.dmp

Filesize
4KB

Download

Analysis

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