guloader | bdd2ad76892eb19127706d5fd1a2f031dc169eaba758d8c7d7cab9639624508d

General

Target

000999374847565342.exe
Size

669KB
MD5

4210f233bf1961119f7a00f22dc2b8ed
SHA1

5f8dc4d285d5da3fa94aac75aa0a9f140e0535a9
SHA256

bdd2ad76892eb19127706d5fd1a2f031dc169eaba758d8c7d7cab9639624508d
SHA512

2120e83b8a5a0c7c4f820f49733a2edeb71f2b8041311075b6d1c61a0f90f546bb1977a00042196a1ba353ab608888828fd6ccb019916fa06c5b30c13cde76d8
SSDEEP

12288:hDG4hAuAs7uPLNVQ/O+fLA4UTIMIso066CXOAg0vW9:t2nsSPQO+fLAjUqATeAe

Score

10^/10

guloader collection discovery downloader spyware stealer

Malware Config

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Downloads MZ/PE file 1 IoCs

flow	pid	Process
54	2464	Process not Found

Loads dropped DLL 1 IoCs

pid	Process
5104	000999374847565342.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-1-5-21-3311063739-2594902809-44604183-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	000999374847565342.exe
Key opened	\REGISTRY\USER\S-1-5-21-3311063739-2594902809-44604183-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	000999374847565342.exe
Key opened	\REGISTRY\USER\S-1-5-21-3311063739-2594902809-44604183-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	000999374847565342.exe

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
35	checkip.dyndns.org
39	reallyfreegeoip.org
40	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
848	000999374847565342.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5104	000999374847565342.exe
848	000999374847565342.exe

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	000999374847565342.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	000999374847565342.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
1560	MicrosoftEdgeUpdate.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
848	000999374847565342.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
5104	000999374847565342.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	848	000999374847565342.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5104 wrote to memory of 848	5104	000999374847565342.exe	94
PID 5104 wrote to memory of 848	5104	000999374847565342.exe	94
PID 5104 wrote to memory of 848	5104	000999374847565342.exe	94
PID 5104 wrote to memory of 848	5104	000999374847565342.exe	94

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3311063739-2594902809-44604183-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	000999374847565342.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3311063739-2594902809-44604183-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	000999374847565342.exe

C:\Users\Admin\AppData\Local\Temp\000999374847565342.exe
"C:\Users\Admin\AppData\Local\Temp\000999374847565342.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5104
- C:\Users\Admin\AppData\Local\Temp\000999374847565342.exe
  "C:\Users\Admin\AppData\Local\Temp\000999374847565342.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:848

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSI3IiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU5ODUiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODQ0NDQzNjAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1MTc5Njc4NDAyIi8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:1560

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

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

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsfD227.tmp\System.dll

Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Skullcaps\galochestvlen\sigger\gammastraaling.ini

Filesize
7KB

MD5
208b492f269677c290c1d0a3b8435b0b

SHA1
3c3e494d0cc8f175e31ddc9a08dd1e3eca89b34f

SHA256
5a9b8ba78b02b3cc378637ae164f9f55491efa7bec601a2ea86f1016c00f7a3e

SHA512
ed30993831d4dc995ba50dc05cf8f6987c75cb0fcdea79c82236226611a9e86c1b23f24c66d1fb6cffa29a95992893cc11103c81f5d9972f059809319c4a1dcb

Download Submit
memory/848-26-0x0000000034EF0000-0x0000000034F8C000-memory.dmp

Filesize
624KB

Download
memory/848-27-0x0000000037B90000-0x0000000037BE0000-memory.dmp

Filesize
320KB

Download
memory/848-32-0x0000000037FC0000-0x0000000037FCA000-memory.dmp

Filesize
40KB

Download
memory/848-31-0x0000000037EC0000-0x0000000037F52000-memory.dmp

Filesize
584KB

Download
memory/848-30-0x0000000037CF0000-0x0000000037EB2000-memory.dmp

Filesize
1.8MB

Download
memory/848-20-0x00000000016E0000-0x00000000045E8000-memory.dmp

Filesize
47.0MB

Download
memory/848-21-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/848-22-0x00000000016E0000-0x00000000045E8000-memory.dmp

Filesize
47.0MB

Download
memory/848-24-0x0000000000480000-0x000000000049E000-memory.dmp

Filesize
120KB

Download
memory/848-25-0x00000000371E0000-0x0000000037784000-memory.dmp

Filesize
5.6MB

Download
memory/5104-19-0x0000000004B10000-0x0000000007A18000-memory.dmp

Filesize
47.0MB

Download
memory/5104-14-0x0000000004B10000-0x0000000007A18000-memory.dmp

Filesize
47.0MB

Download
memory/5104-15-0x0000000076EC1000-0x0000000076FE1000-memory.dmp

Filesize
1.1MB

Download
memory/5104-18-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/5104-17-0x0000000004B10000-0x0000000007A18000-memory.dmp

Filesize
47.0MB

Download

Analysis

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