guloader | 53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093

General

Target

53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe
Size

1010KB
MD5

99815ed08ddbc13eb635f1a2534cbfb0
SHA1

bbf3c832c86a824e5fc7c63a9007c4eab1c38470
SHA256

53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093
SHA512

5bd32be0d83a0c6e531256ba98ae8f8d7b6803c540f5af409212e79cdd72e8cded4ebae6e3bf8f0f68841aeb0b37f342cdbd29791c47469d0f13abee1a00ce72
SSDEEP

24576:pTqMPCpufeCqenzhTRfX6ahX1DCb+H+JKjZMWSg:pTZPCwfeEnxRXhXNCqpVM5g

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 5 IoCs

pid	Process
2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe
2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe
2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe
2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe
2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.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

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe
2824	caspol.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2240 set thread context of 2824	2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe	31

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Common Files\deaktiveringernes\ironist.lnk	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\vulcanizer\hovedrollens.ini	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.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	caspol.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 2824	2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe	31
PID 2240 wrote to memory of 2824	2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe	31
PID 2240 wrote to memory of 2824	2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe	31
PID 2240 wrote to memory of 2824	2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe	31
PID 2240 wrote to memory of 2824	2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe	31
PID 2240 wrote to memory of 2824	2240	53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe	31

C:\Users\Admin\AppData\Local\Temp\53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe
"C:\Users\Admin\AppData\Local\Temp\53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- 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:2240
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
  "C:\Users\Admin\AppData\Local\Temp\53d1be737d25b9bf45fec95665582a569b3e2fee7f9e188cacec22b0ff212093N.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2824

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\nsdD1E0.tmp\AdvSplash.dll

Filesize
6KB

MD5
1871af84805057b5ebc05ee46b56625d

SHA1
50e1c315ad30f5f3f300c7cd9dd0d5d626fe0167

SHA256
62b3db0446750ca9fd693733eec927acc1f50012a47785343286e63b650b7621

SHA512
c1979ee98dfdb807776c439218528d80b4b244a87e692f1538e40f9c2c82db8b77485eb1429325b6f44419bf1f4cd454e43ff381eff077a8b4f4d9eb0d7e54d4

Download Submit
\Users\Admin\AppData\Local\Temp\nsdD1E0.tmp\System.dll

Filesize
12KB

MD5
564bb0373067e1785cba7e4c24aab4bf

SHA1
7c9416a01d821b10b2eef97b80899d24014d6fc1

SHA256
7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5

SHA512
22c61a323cb9293d7ec5c7e7e60674d0e2f7b29d55be25eb3c128ea2cd7440a1400cee17c43896b996278007c0d247f331a9b8964e3a40a0eb1404a9596c4472

Download Submit
\Users\Admin\AppData\Local\Temp\nsdD1E0.tmp\nsDialogs.dll

Filesize
9KB

MD5
48f3e7860e1de2b4e63ec744a5e9582a

SHA1
420c64d802a637c75a53efc8f748e1aede3d6dc6

SHA256
6bf9cccd8a600f4d442efe201e8c07b49605ba35f49a4b3ab22fa2641748e156

SHA512
28716ddea580eeb23d93d1ff6ea0cf79a725e13c8f8a17ec9dfacb1fe29c7981ad84c03aed05663adc52365d63d19ec2f366762d1c685e3a9d93037570c3c583

Download Submit
\Users\Admin\AppData\Local\Temp\nsdD1E0.tmp\nsExec.dll

Filesize
7KB

MD5
4c77a65bb121bb7f2910c1fa3cb38337

SHA1
94531e3c6255125c1a85653174737d275bc35838

SHA256
5e66489393f159aa0fd30b630bb345d03418e9324e7d834b2e4195865a637cfe

SHA512
df50eadf312469c56996c67007d31b85d00e91a4f40355e786536fc0336ac9c2fd8ad9df6e65ab390cc6f031aca28c92212ea23cc40eb600b82a63be3b5b8c04

Download Submit
memory/2240-36-0x0000000003250000-0x000000000461D000-memory.dmp

Filesize
19.8MB

Download
memory/2240-38-0x00000000777A1000-0x00000000778A2000-memory.dmp

Filesize
1.0MB

Download
memory/2240-39-0x00000000777A0000-0x0000000077949000-memory.dmp

Filesize
1.7MB

Download
memory/2240-37-0x0000000003250000-0x000000000461D000-memory.dmp

Filesize
19.8MB

Download
memory/2240-67-0x0000000003250000-0x000000000461D000-memory.dmp

Filesize
19.8MB

Download
memory/2824-40-0x00000000777A0000-0x0000000077949000-memory.dmp

Filesize
1.7MB

Download
memory/2824-41-0x0000000072D90000-0x0000000073DF2000-memory.dmp

Filesize
16.4MB

Download

Analysis

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