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 discovery downloader keylogger 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
69	3904	Process not Found

Loads dropped DLL 2 IoCs

pid	Process
1700	Opsprtning.exe
1700	Opsprtning.exe

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

Web Service

T1102

flow	ioc
39	drive.google.com
41	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
78	checkip.dyndns.org
80	reallyfreegeoip.org
81	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1620	Opsprtning.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1700	Opsprtning.exe
1620	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

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
4004	MicrosoftEdgeUpdate.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1620	Opsprtning.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1700	Opsprtning.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1620	Opsprtning.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 1620	1700	Opsprtning.exe	92
PID 1700 wrote to memory of 1620	1700	Opsprtning.exe	92
PID 1700 wrote to memory of 1620	1700	Opsprtning.exe	92
PID 1700 wrote to memory of 1620	1700	Opsprtning.exe	92

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:1700
- C:\Users\Admin\AppData\Local\Temp\Opsprtning.exe
  "C:\Users\Admin\AppData\Local\Temp\Opsprtning.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1620

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSI2IiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU5MjEiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODE5ODA3NzAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1Mzk2ODkwNDIwIi8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:4004

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

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

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsxCB9E.tmp\System.dll

Filesize
11KB

MD5
cf85183b87314359488b850f9e97a698

SHA1
6b6c790037eec7ebea4d05590359cb4473f19aea

SHA256
3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac

SHA512
fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

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

Filesize
906B

MD5
7a28dbf88dab1a80751b5b1a37e28576

SHA1
1fe05f192c23eac50cbf7c4ef46ff4950a0cb51a

SHA256
03d80e709f8d4b84a6e21dc77ba328ca283c33c5aaee482735a726392020b6da

SHA512
f25752516614d6607fb247c29d5010bc79a5fd090ba63b1f9efd81238c8472d0c9b89c3bd5f792a62fd9178be120fa1bffd54517ca2d6e5b9a3c3ec64693ca3d

Download Submit
memory/1620-322-0x0000000077E41000-0x0000000077F61000-memory.dmp

Filesize
1.1MB

Download
memory/1620-312-0x00000000016C0000-0x0000000006FC2000-memory.dmp

Filesize
89.0MB

Download
memory/1620-313-0x0000000077EC8000-0x0000000077EC9000-memory.dmp

Filesize
4KB

Download
memory/1620-314-0x0000000077EE5000-0x0000000077EE6000-memory.dmp

Filesize
4KB

Download
memory/1620-315-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/1620-335-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/1620-337-0x0000000000460000-0x00000000004AA000-memory.dmp

Filesize
296KB

Download
memory/1620-338-0x0000000039D70000-0x000000003A314000-memory.dmp

Filesize
5.6MB

Download
memory/1620-336-0x00000000016C0000-0x0000000006FC2000-memory.dmp

Filesize
89.0MB

Download
memory/1620-339-0x0000000039C70000-0x0000000039D0C000-memory.dmp

Filesize
624KB

Download
memory/1700-311-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/1700-310-0x0000000077E41000-0x0000000077F61000-memory.dmp

Filesize
1.1MB

Download
memory/1700-309-0x0000000077E41000-0x0000000077F61000-memory.dmp

Filesize
1.1MB

Download

Analysis

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