guloader | 5ac5d66f604f656b5b7de2506f6e8ad911b81a3bccd1317f315e3cc3ad68851c

General

Target

3456754365_PDF.exe
Size

743KB
MD5

32e141183a50053d9c465ae8394ac718
SHA1

e9264e0fa77433ce8f1209372a5cbff50d4e3113
SHA256

5ac5d66f604f656b5b7de2506f6e8ad911b81a3bccd1317f315e3cc3ad68851c
SHA512

b83ea417187ec70d13465ea0f36f436e6c51fb6abc79032b42332aa5507541d21eb63dc85b6c53c897287a855b46dfef3e81293ef1876af7b23a28c17a3ee1e2
SSDEEP

12288:Sgn0B2gAPgy1IpO/Cfp3krcah1Ybwb2ub1ayFB+E/1F0bN0FhU0XLJk+Xe/XK41O:oB1STIpO/+p3kIah1YMphayFB+O0bN0h

Score

10^/10

guloader vipkeylogger discovery downloader keylogger stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot7925601648:AAFJQr-qYufJQhg5VRCefCc8bUKVvQ_OCT4/sendMessage?chat_id=1940565380

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
2392	3456754365_PDF.exe
2392	3456754365_PDF.exe
2392	3456754365_PDF.exe
2392	3456754365_PDF.exe
2392	3456754365_PDF.exe
2392	3456754365_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

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1008	3456754365_PDF.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2392	3456754365_PDF.exe
1008	3456754365_PDF.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\Assads.sub	3456754365_PDF.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Challa18\undergrnse.abi	3456754365_PDF.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	3456754365_PDF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3456754365_PDF.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1008	3456754365_PDF.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2392	3456754365_PDF.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1008	3456754365_PDF.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2392 wrote to memory of 1008	2392	3456754365_PDF.exe	30
PID 2392 wrote to memory of 1008	2392	3456754365_PDF.exe	30
PID 2392 wrote to memory of 1008	2392	3456754365_PDF.exe	30
PID 2392 wrote to memory of 1008	2392	3456754365_PDF.exe	30
PID 2392 wrote to memory of 1008	2392	3456754365_PDF.exe	30

C:\Users\Admin\AppData\Local\Temp\3456754365_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\3456754365_PDF.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:2392
- C:\Users\Admin\AppData\Local\Temp\3456754365_PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\3456754365_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:1008

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\Botanophilist.ini

Filesize
47B

MD5
e78c2cc57d9e73a1253586ded51aca17

SHA1
bc6d6f3cd90f0ec5a5b4530ac8c6e28cd5982ae0

SHA256
fea03febfe042ebce2e33a0dcba4ac09061430376544dff8eb5b2eb7bc977ec6

SHA512
450f708670a9de5cb1ae224caddde8f9451a64e4144147d3b55eb38fc8968628c1d2e855286c409cac180263462f1d60eb8be25bc6bd8d32559672326d8ae8af

Download Submit
C:\Users\Admin\AppData\Local\Temp\nse1F46.tmp\System.dll

Filesize
11KB

MD5
0ff2d70cfdc8095ea99ca2dabbec3cd7

SHA1
10c51496d37cecd0e8a503a5a9bb2329d9b38116

SHA256
982c5fb7ada7d8c9bc3e419d1c35da6f05bc5dd845940c179af3a33d00a36a8b

SHA512
cb5fc0b3194f469b833c2c9abf493fcec5251e8609881b7f5e095b9bd09ed468168e95dda0ba415a7d8d6b7f0dee735467c0ed8e52b223eb5359986891ba6e2e

Download Submit
\Users\Admin\AppData\Local\Temp\nse1F46.tmp\LangDLL.dll

Filesize
5KB

MD5
174708997758321cf926b69318c6c3f5

SHA1
645488089bf320f6864e0d0bc284c85216e56fbd

SHA256
f577b66492e97c7b8bf515398d8deb745abafd74f56fc03e67fce248ebbeb873

SHA512
214433597e04ca1ff9b4fe092d5d2997707a7c56f0f82c85d586088a200e4455028f3b9427d87b4f06f9252557d5be4b7a9138ea6a8d045df6209421fd8ca054

Download Submit
memory/1008-361-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/1008-365-0x00000000770D0000-0x0000000077279000-memory.dmp

Filesize
1.7MB

Download
memory/1008-362-0x00000000014F0000-0x0000000003642000-memory.dmp

Filesize
33.3MB

Download
memory/1008-363-0x0000000000480000-0x00000000004C8000-memory.dmp

Filesize
288KB

Download
memory/1008-338-0x00000000014F0000-0x0000000003642000-memory.dmp

Filesize
33.3MB

Download
memory/1008-339-0x00000000770D0000-0x0000000077279000-memory.dmp

Filesize
1.7MB

Download
memory/2392-334-0x0000000003FE0000-0x0000000006132000-memory.dmp

Filesize
33.3MB

Download
memory/2392-337-0x00000000770D0000-0x0000000077279000-memory.dmp

Filesize
1.7MB

Download
memory/2392-336-0x0000000003FE0000-0x0000000006132000-memory.dmp

Filesize
33.3MB

Download
memory/2392-335-0x00000000770D1000-0x00000000771D2000-memory.dmp

Filesize
1.0MB

Download

Analysis

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