guloader | 79714172680d9fd5b1d49fc518abe9cef9200194a04b6611466beccb28c31728

General

Target

rJustificante67.exe
Size

1001KB
MD5

96bc48e7cc38d731e7e2c25f3f80a88e
SHA1

bd30afd2f438928b3cb98d9f74766f1e401db091
SHA256

79714172680d9fd5b1d49fc518abe9cef9200194a04b6611466beccb28c31728
SHA512

7d71064359f17cae6128db87fdc9a743368b441310d5118734e0ba2a44f5673aeb0f93ea129faa51c6f61f36f135a38f2d90dc550708e87bec67131e4011f908
SSDEEP

24576:IGLEfEEQyQpBGB59WIMJfEKwqQnc9V4+QA3plULISW1D:1+3isWppTBEk3AAD

Score

10^/10

guloader vipkeylogger discovery downloader keylogger stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot7809339088:AAEUtMa_u0dd_zBfAWh2Ah2az4h6hNs_Wg0/sendMessage?chat_id=7618581100

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 2 IoCs

pid	Process
2656	rJustificante67.exe
2656	rJustificante67.exe

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

Web Service

T1102

flow	ioc
3	drive.google.com
5	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
16	reallyfreegeoip.org
17	reallyfreegeoip.org
14	checkip.dyndns.org

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\revyviserne\Tilbed.ini	rJustificante67.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3056	rJustificante67.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2656	rJustificante67.exe
3056	rJustificante67.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\delarbejderne.nar	rJustificante67.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\fremmder\ifaldne.lev	rJustificante67.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 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	rJustificante67.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rJustificante67.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3056	rJustificante67.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2656	rJustificante67.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3056	rJustificante67.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2656 wrote to memory of 3056	2656	rJustificante67.exe	30
PID 2656 wrote to memory of 3056	2656	rJustificante67.exe	30
PID 2656 wrote to memory of 3056	2656	rJustificante67.exe	30
PID 2656 wrote to memory of 3056	2656	rJustificante67.exe	30
PID 2656 wrote to memory of 3056	2656	rJustificante67.exe	30

C:\Users\Admin\AppData\Local\Temp\rJustificante67.exe
"C:\Users\Admin\AppData\Local\Temp\rJustificante67.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- 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:2656
- C:\Users\Admin\AppData\Local\Temp\rJustificante67.exe
  "C:\Users\Admin\AppData\Local\Temp\rJustificante67.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3056

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

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Microsoft\Windows\Templates\dinosaurusserne.lnk

Filesize
1KB

MD5
a1017821b2dd8fa1b10dadc257dbf3a1

SHA1
f3b9e6dd647060866a1421a6aac87701a2d470ec

SHA256
0e04db32dae2a4f6d19d95a829a364966a7bdf27a8d9708282548cfe8dfb2e2d

SHA512
6d109a194d9e217683bba9a35ee9eea0fd0c374d712df55f341cd8b32a18d25cbd5d94048ac67d57c40212d9939ab16b4bc6b4b8239fb1324f38fa1b42cac0e0

Download Submit
\Users\Admin\AppData\Local\Temp\nso56F8.tmp\System.dll

Filesize
11KB

MD5
b853d5d2361ade731e33e882707efc34

SHA1
c58b1aeabdf1cbb8334ef8797e7aceaa7a1cb6be

SHA256
f0cd96e0b6e40f92ad1aa0efacde833bae807b92fca19bf062c1cf8acf29484b

SHA512
8ea31d82ffa6f58dab5632fe72690d3a6db0be65aec85fc8a1f71626773c0974dcebefae17bcf67c4c56ef442545e985eea0b348ff6e4fc36740640092b08d69

Download Submit
memory/2656-312-0x00000000035E0000-0x0000000004469000-memory.dmp

Filesize
14.5MB

Download
memory/2656-314-0x0000000077010000-0x00000000771B9000-memory.dmp

Filesize
1.7MB

Download
memory/2656-313-0x0000000077011000-0x0000000077112000-memory.dmp

Filesize
1.0MB

Download
memory/3056-315-0x00000000014F0000-0x0000000002379000-memory.dmp

Filesize
14.5MB

Download
memory/3056-316-0x0000000077010000-0x00000000771B9000-memory.dmp

Filesize
1.7MB

Download
memory/3056-339-0x00000000014F0000-0x0000000002379000-memory.dmp

Filesize
14.5MB

Download
memory/3056-338-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/3056-340-0x0000000000480000-0x00000000004C8000-memory.dmp

Filesize
288KB

Download

Analysis

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