guloader | 8a7fdce71df474378c98736c8f93bacb45ab6034bd71316b5eeb40c692d3ee21

General

Target

Opsprtning.exe
Size

756KB
MD5

36778a82c524fca3b6946eea12169d90
SHA1

4001562de8499dc93076a19ba844395e6a5abc10
SHA256

8a7fdce71df474378c98736c8f93bacb45ab6034bd71316b5eeb40c692d3ee21
SHA512

3fc0111a976324bcc489dc2424e3541609e257643f7cc2c3a1f6e90e80ea6eda19a0630f79946c1de5a86946104183eb0a873ec0365cd5abf5aea1c1b751e8f8
SSDEEP

12288:NF921bthmFx2M9Fy38SeD83S1CvnWXAFxnE8UML789zUO9vVOI0emBmz:xShEx3G3lRsCfWYxnlGUOdb0emBmz

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

Downloads MZ/PE file 1 IoCs

flow	pid	Process
70	4852	Process not Found

Loads dropped DLL 2 IoCs

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

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

Web Service

T1102

flow	ioc
38	drive.google.com
23	drive.google.com
25	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
43	checkip.dyndns.org
46	reallyfreegeoip.org
48	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3024	Opsprtning.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
716	Opsprtning.exe
3024	Opsprtning.exe

Drops file in Program Files directory 4 IoCs

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

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\rothesay\Fallenternes.con	Opsprtning.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	Opsprtning.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Opsprtning.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
3624	MicrosoftEdgeUpdate.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3024	Opsprtning.exe
3024	Opsprtning.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
716	Opsprtning.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3024	Opsprtning.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 716 wrote to memory of 3024	716	Opsprtning.exe	92
PID 716 wrote to memory of 3024	716	Opsprtning.exe	92
PID 716 wrote to memory of 3024	716	Opsprtning.exe	92
PID 716 wrote to memory of 3024	716	Opsprtning.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	Opsprtning.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	Opsprtning.exe

C:\Users\Admin\AppData\Local\Temp\Opsprtning.exe
"C:\Users\Admin\AppData\Local\Temp\Opsprtning.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:716
- C:\Users\Admin\AppData\Local\Temp\Opsprtning.exe
  "C:\Users\Admin\AppData\Local\Temp\Opsprtning.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:3024

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIyIiBpbnN0YWxsZGF0ZXRpbWU9IjE3MzkyODIxNjkiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4Mzc1MzE4NTEwMTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1NDAzNjY4MDA0Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:3624

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\nsaACDB.tmp\System.dll

Filesize
11KB

MD5
cf85183b87314359488b850f9e97a698

SHA1
6b6c790037eec7ebea4d05590359cb4473f19aea

SHA256
3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac

SHA512
fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

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

Filesize
906B

MD5
507ff9785fae13c9c4430732fe848d3c

SHA1
aa61b47ab81668dccef5b9a1aa32fe9f4417019e

SHA256
1cee31d67c89e569dfb09e8017d05b5fefc3490c43b9dfb07c8c804ab66aa60b

SHA512
78837dd9a5eba12b6e54e1b6b26260211a212abc6f51f60bb78201b093c2c70e5308b48526e5491d00d5830a365c59917f475ab78cceceb16a716aa1075ddb61

Download Submit
memory/716-309-0x0000000077901000-0x0000000077A21000-memory.dmp

Filesize
1.1MB

Download
memory/716-311-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/716-310-0x0000000077901000-0x0000000077A21000-memory.dmp

Filesize
1.1MB

Download
memory/3024-334-0x0000000000460000-0x00000000004AA000-memory.dmp

Filesize
296KB

Download
memory/3024-336-0x0000000039D80000-0x0000000039E1C000-memory.dmp

Filesize
624KB

Download
memory/3024-314-0x00000000779A5000-0x00000000779A6000-memory.dmp

Filesize
4KB

Download
memory/3024-315-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3024-316-0x0000000077901000-0x0000000077A21000-memory.dmp

Filesize
1.1MB

Download
memory/3024-330-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3024-333-0x000000007208E000-0x000000007208F000-memory.dmp

Filesize
4KB

Download
memory/3024-312-0x00000000016C0000-0x0000000006FC2000-memory.dmp

Filesize
89.0MB

Download
memory/3024-335-0x0000000039EA0000-0x000000003A444000-memory.dmp

Filesize
5.6MB

Download
memory/3024-313-0x0000000077988000-0x0000000077989000-memory.dmp

Filesize
4KB

Download
memory/3024-332-0x00000000016C0000-0x0000000006FC2000-memory.dmp

Filesize
89.0MB

Download
memory/3024-337-0x0000000072080000-0x0000000072830000-memory.dmp

Filesize
7.7MB

Download
memory/3024-340-0x000000007208E000-0x000000007208F000-memory.dmp

Filesize
4KB

Download
memory/3024-341-0x0000000072080000-0x0000000072830000-memory.dmp

Filesize
7.7MB

Download
memory/3024-343-0x000000003A960000-0x000000003AB22000-memory.dmp

Filesize
1.8MB

Download
memory/3024-344-0x0000000037790000-0x00000000377E0000-memory.dmp

Filesize
320KB

Download
memory/3024-345-0x000000003AB30000-0x000000003B05C000-memory.dmp

Filesize
5.2MB

Download
memory/3024-347-0x000000003B060000-0x000000003B0F2000-memory.dmp

Filesize
584KB

Download
memory/3024-348-0x000000003B120000-0x000000003B12A000-memory.dmp

Filesize
40KB

Download

Analysis

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