guloader | 510877d9cee23c4fc8a3f0a96b12a175f1dbe887978f43499eb1cc2d05571ffb

General

Target

Polylogy.exe
Size

990KB
MD5

7661aaf5dbaccb77ebf948bc69b5725d
SHA1

791ccb6267488a0d86891ae25be93a36a6b5bedd
SHA256

510877d9cee23c4fc8a3f0a96b12a175f1dbe887978f43499eb1cc2d05571ffb
SHA512

19cad72428ed242a9c5d743ade6ed3486a8d2454cd98d555d2b2df3f77848162bf1a1dbba0bbfd8d5f39676ff0d82dc0ea87efa73a80f9680eaad7ba7a5eb7c0
SSDEEP

24576:IGhzpxfOytYgk/ZLpIK3MrFNbMUqkpg7bII6vJ2FYMU07m1iQ:zrKz/irFNb+k2bsxTt8mkQ

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

Loads dropped DLL 2 IoCs

pid	Process
796	Polylogy.exe
796	Polylogy.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
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	Polylogy.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1300	Polylogy.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
796	Polylogy.exe
1300	Polylogy.exe

Drops file in Program Files directory 1 IoCs

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

Drops file in Windows directory 1 IoCs

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

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1300	Polylogy.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
796	Polylogy.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1300	Polylogy.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 796 wrote to memory of 1300	796	Polylogy.exe	29
PID 796 wrote to memory of 1300	796	Polylogy.exe	29
PID 796 wrote to memory of 1300	796	Polylogy.exe	29
PID 796 wrote to memory of 1300	796	Polylogy.exe	29
PID 796 wrote to memory of 1300	796	Polylogy.exe	29

C:\Users\Admin\AppData\Local\Temp\Polylogy.exe
"C:\Users\Admin\AppData\Local\Temp\Polylogy.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:796
- C:\Users\Admin\AppData\Local\Temp\Polylogy.exe
  "C:\Users\Admin\AppData\Local\Temp\Polylogy.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1300

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
becd3e76f8f21fff407c0b61a828c32b

SHA1
9fa171c9d3b55974bd86068b680865838e9eaec0

SHA256
d7499c65de3fe831d955b82d172001088ecd1579aa62b23ae2961c1b5f77bc22

SHA512
4ae93c02633136af0cf50b9bb73d4188e53c36fafeed51e57bb791c7352e8a75e449edee2bf56bb890dc09b596003b1ebc5aa3589e37ecc84a365a8ee6cac426

Download Submit
\Users\Admin\AppData\Local\Temp\nsu6164.tmp\System.dll

Filesize
11KB

MD5
b853d5d2361ade731e33e882707efc34

SHA1
c58b1aeabdf1cbb8334ef8797e7aceaa7a1cb6be

SHA256
f0cd96e0b6e40f92ad1aa0efacde833bae807b92fca19bf062c1cf8acf29484b

SHA512
8ea31d82ffa6f58dab5632fe72690d3a6db0be65aec85fc8a1f71626773c0974dcebefae17bcf67c4c56ef442545e985eea0b348ff6e4fc36740640092b08d69

Download Submit
memory/796-312-0x00000000775C1000-0x00000000776C2000-memory.dmp

Filesize
1.0MB

Download
memory/796-313-0x00000000775C0000-0x0000000077769000-memory.dmp

Filesize
1.7MB

Download
memory/1300-314-0x00000000014F0000-0x0000000004FED000-memory.dmp

Filesize
59.0MB

Download
memory/1300-315-0x00000000775C0000-0x0000000077769000-memory.dmp

Filesize
1.7MB

Download
memory/1300-337-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/1300-338-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/1300-339-0x00000000014F0000-0x0000000004FED000-memory.dmp

Filesize
59.0MB

Download
memory/1300-340-0x0000000000480000-0x00000000004CA000-memory.dmp

Filesize
296KB

Download

Analysis

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