guloader | f6ad2374fe19582a54ac0b9972ec41223f4291af9e49834fbd240629b9c74e62

General

Target

FA25000003_PDF.exe
Size

556KB
MD5

6ca301ca8387dce5fd21f318ebba05c6
SHA1

42721db007b2a33119e951aa29749af25bc4cf01
SHA256

f6ad2374fe19582a54ac0b9972ec41223f4291af9e49834fbd240629b9c74e62
SHA512

37eb46fc6493dc3ee783a9fbfba56356f3a088dca8c53ba4d7f7aa3dd2f56c2f8ab5567bce3118f0611a7923e4cda12174f407b3262c1f4f41f07835fcc1f618
SSDEEP

12288:Ak2r86ZoU8clmyN7oOX4V44I5pqAm3R3W6TRVZdMN6:m86SU8clmyNI44InqRR1ZdM0

Score

10^/10

guloader vipkeylogger discovery downloader keylogger stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot7581561605:AAGI-5iG4DeXqVhNDvhaICvGbOejumUD6AE/sendMessage?chat_id=5434550993

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 6 IoCs

pid	Process
2860	FA25000003_PDF.exe
2860	FA25000003_PDF.exe
2860	FA25000003_PDF.exe
2860	FA25000003_PDF.exe
2860	FA25000003_PDF.exe
2860	FA25000003_PDF.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\equity.Mag	FA25000003_PDF.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1736	FA25000003_PDF.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2860	FA25000003_PDF.exe
1736	FA25000003_PDF.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2860 set thread context of 1736	2860	FA25000003_PDF.exe	31

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	FA25000003_PDF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FA25000003_PDF.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1736	FA25000003_PDF.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2860	FA25000003_PDF.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1736	FA25000003_PDF.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2860 wrote to memory of 1736	2860	FA25000003_PDF.exe	31
PID 2860 wrote to memory of 1736	2860	FA25000003_PDF.exe	31
PID 2860 wrote to memory of 1736	2860	FA25000003_PDF.exe	31
PID 2860 wrote to memory of 1736	2860	FA25000003_PDF.exe	31
PID 2860 wrote to memory of 1736	2860	FA25000003_PDF.exe	31
PID 2860 wrote to memory of 1736	2860	FA25000003_PDF.exe	31

C:\Users\Admin\AppData\Local\Temp\FA25000003_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\FA25000003_PDF.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2860
- C:\Users\Admin\AppData\Local\Temp\FA25000003_PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\FA25000003_PDF.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1736

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\secondo\ruddys\Jageren\birgita.txt

Filesize
4KB

MD5
2e7baf4f3c9f5830af25c66ecbe1dac4

SHA1
275ee3d8faeef514ec71605788561bae14f3a48a

SHA256
37346b6387f7d33a9eab62407f94cd716081eb80d7443db91b788479e6fcaf4c

SHA512
a7900cc0e56998f9cd30b24584c15a8a533139cb01d16bf2046c1b1bf5ffbd67216aac69a83d1968206a99185f692bf21429622cbf53a9abbbf528ff21f7cb45

Download Submit
\Users\Admin\AppData\Local\Temp\nsj38AE.tmp\LangDLL.dll

Filesize
5KB

MD5
f1e9eed02db3a822a7ddef0c724e5f1f

SHA1
65864992f5b6c79c5efbefb5b1354648a8a86709

SHA256
6dff504c6759c418c6635c9b25b8c91d0d9ef7787a3a93610d7670bb563c09df

SHA512
c22b64fff76b25cf53231b8636f07b361d95791c4646787ce7beac27ad6a0de88337dcceb25b5196f97c452dda72e2614647f51a8a18cb4d5228a82ed2e0780c

Download Submit
\Users\Admin\AppData\Local\Temp\nsj38AE.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/1736-52-0x0000000077BD0000-0x0000000077D79000-memory.dmp

Filesize
1.7MB

Download
memory/1736-75-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/1736-76-0x0000000000480000-0x00000000004C8000-memory.dmp

Filesize
288KB

Download
memory/2860-48-0x0000000003A00000-0x0000000005AB4000-memory.dmp

Filesize
32.7MB

Download
memory/2860-49-0x0000000003A00000-0x0000000005AB4000-memory.dmp

Filesize
32.7MB

Download
memory/2860-50-0x0000000077BD1000-0x0000000077CD2000-memory.dmp

Filesize
1.0MB

Download
memory/2860-51-0x0000000077BD0000-0x0000000077D79000-memory.dmp

Filesize
1.7MB

Download
memory/2860-53-0x0000000003A00000-0x0000000005AB4000-memory.dmp

Filesize
32.7MB

Download

Analysis

Sharing