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
3056	rJustificante67.exe
3056	rJustificante67.exe

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

Web Service

T1102

flow	ioc
4	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
14	checkip.dyndns.org
16	reallyfreegeoip.org
17	reallyfreegeoip.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
1044	rJustificante67.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3056	rJustificante67.exe
1044	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
1044	rJustificante67.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3056	rJustificante67.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1044	rJustificante67.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 1044	3056	rJustificante67.exe	30
PID 3056 wrote to memory of 1044	3056	rJustificante67.exe	30
PID 3056 wrote to memory of 1044	3056	rJustificante67.exe	30
PID 3056 wrote to memory of 1044	3056	rJustificante67.exe	30
PID 3056 wrote to memory of 1044	3056	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:3056
- 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:1044

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
75c1973354e477d3fbd5502b9583784e

SHA1
3d046a4787b1f770e2854e986c74e421675f9907

SHA256
06735884a8ae8c9669e7df6ae24ed190fb0ba187d1cab366de391a2ca53dfa04

SHA512
9ff2245f245a70e669b0f82f88a05c84d021f486a13d81b8ed26c49acfa73b72324274995247b343da3b7ffd377b748d22e91e6a4fe9da6116e377801bdb88f1

Download Submit
\Users\Admin\AppData\Local\Temp\nse2252.tmp\System.dll

Filesize
11KB

MD5
b853d5d2361ade731e33e882707efc34

SHA1
c58b1aeabdf1cbb8334ef8797e7aceaa7a1cb6be

SHA256
f0cd96e0b6e40f92ad1aa0efacde833bae807b92fca19bf062c1cf8acf29484b

SHA512
8ea31d82ffa6f58dab5632fe72690d3a6db0be65aec85fc8a1f71626773c0974dcebefae17bcf67c4c56ef442545e985eea0b348ff6e4fc36740640092b08d69

Download Submit
memory/1044-317-0x00000000778C0000-0x0000000077A69000-memory.dmp

Filesize
1.7MB

Download
memory/1044-316-0x00000000014F0000-0x0000000002379000-memory.dmp

Filesize
14.5MB

Download
memory/1044-326-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/1044-339-0x00000000014F0000-0x0000000002379000-memory.dmp

Filesize
14.5MB

Download
memory/1044-338-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/1044-340-0x0000000000480000-0x00000000004C8000-memory.dmp

Filesize
288KB

Download
memory/3056-312-0x0000000002DF0000-0x0000000003C79000-memory.dmp

Filesize
14.5MB

Download
memory/3056-313-0x0000000002DF0000-0x0000000003C79000-memory.dmp

Filesize
14.5MB

Download
memory/3056-314-0x00000000778C1000-0x00000000779C2000-memory.dmp

Filesize
1.0MB

Download
memory/3056-315-0x00000000778C0000-0x0000000077A69000-memory.dmp

Filesize
1.7MB

Download

Analysis

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