guloader | 6e2d39aa99847f4450506afe26b79964aff495181a8e8cf09a7220c6e8d89c0c

General

Target

Factura 1-000020.exe
Size

648KB
MD5

9d6708323900f452f54e1686d0f6a51e
SHA1

9edad44fedccef9d611a7257bb03e6f9aeecb33b
SHA256

6818ec6de5edc2758e82824c374b5c3642d52e855e6f55db945d8245662f4307
SHA512

5ab111c4585052029a035bcc1133fecf24f7dd3b7d1b8cdd03cf9d7ec131326013adde166580bffc280b38dae288de2c95e17fbc4c65c7ce5518bfe31d59723c
SSDEEP

12288:Cgum6gVzk8JwoqcjwQ2GnvTfAebpHmohC6oN4XAWTwj41jU:BVo8xqcMQ2GvTfAebzhC74XAjN

Score

10^/10

guloader vipkeylogger discovery downloader keylogger stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot7773098790:AAEE5JLRU6ZmFmj9gIQj7Pc9-3yLSS6W5fs/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
2324	Factura 1-000020.exe
2324	Factura 1-000020.exe
2324	Factura 1-000020.exe
2324	Factura 1-000020.exe
2324	Factura 1-000020.exe
2324	Factura 1-000020.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
12	checkip.dyndns.org
14	reallyfreegeoip.org
15	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2676	Factura 1-000020.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2324	Factura 1-000020.exe
2676	Factura 1-000020.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\benna\Tramsmith.mus	Factura 1-000020.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\Tantiemes0\rejseforsikringernes.ini	Factura 1-000020.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	Factura 1-000020.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Factura 1-000020.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2676	Factura 1-000020.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2324	Factura 1-000020.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2676	Factura 1-000020.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 2676	2324	Factura 1-000020.exe	31
PID 2324 wrote to memory of 2676	2324	Factura 1-000020.exe	31
PID 2324 wrote to memory of 2676	2324	Factura 1-000020.exe	31
PID 2324 wrote to memory of 2676	2324	Factura 1-000020.exe	31
PID 2324 wrote to memory of 2676	2324	Factura 1-000020.exe	31

C:\Users\Admin\AppData\Local\Temp\Factura 1-000020.exe
"C:\Users\Admin\AppData\Local\Temp\Factura 1-000020.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:2324
- C:\Users\Admin\AppData\Local\Temp\Factura 1-000020.exe
  "C:\Users\Admin\AppData\Local\Temp\Factura 1-000020.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2676

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

\Users\Admin\AppData\Local\Temp\nstD76D.tmp\LangDLL.dll

Filesize
5KB

MD5
0c44f21d4afc81cc99fac7cc35e4503a

SHA1
3d0d5c684df99a46510c0e2c0020163a9d11c08d

SHA256
8dc2be6679497994e3ddc97bc7bc1ce2b3c17ef3528b03ded6696ef198a11d10

SHA512
4e4bd35d6aa21cecbfe7a93a2ee7db8ee78ca710a4193dfe240d1067afbe10f61db332c1c85f6cc3ba404d895a959742401b615ef8ff5bd9028254c4a43a0923

Download Submit
\Users\Admin\AppData\Local\Temp\nstD76D.tmp\System.dll

Filesize
11KB

MD5
a4dd044bcd94e9b3370ccf095b31f896

SHA1
17c78201323ab2095bc53184aa8267c9187d5173

SHA256
2e226715419a5882e2e14278940ee8ef0aa648a3ef7af5b3dc252674111962bc

SHA512
87335a43b9ca13e1300c7c23e702e87c669e2bcf4f6065f0c684fc53165e9c1f091cc4d79a3eca3910f0518d3b647120ac0be1a68eaade2e75eaa64adfc92c5a

Download Submit
memory/2324-34-0x00000000772A1000-0x00000000773A2000-memory.dmp

Filesize
1.0MB

Download
memory/2324-35-0x00000000772A0000-0x0000000077449000-memory.dmp

Filesize
1.7MB

Download
memory/2676-36-0x0000000001500000-0x0000000004EB0000-memory.dmp

Filesize
57.7MB

Download
memory/2676-37-0x00000000772A0000-0x0000000077449000-memory.dmp

Filesize
1.7MB

Download
memory/2676-54-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2676-58-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2676-60-0x0000000000490000-0x00000000004D8000-memory.dmp

Filesize
288KB

Download
memory/2676-59-0x0000000001500000-0x0000000004EB0000-memory.dmp

Filesize
57.7MB

Download

Analysis

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