guloader | c24e591bfe433669d8cb9b3b3c4c989da4bf6d6cc58de373dead1859dbcbcc27

General

Target

PO-000172483.exe
Size

1.1MB
MD5

038aab3a1450ed01e0635bdb5b09c39c
SHA1

bf02949f07662158215776acbaac683b6959320e
SHA256

ad1f6b68331f1d4b983df1eddfea197f4a091e648528dc28c6016524b51d58b0
SHA512

471c0ab744b228dd5b46c53d3dde2127834ff066bc3dde1f969c287fb22bc490f5bdc2fee13141fc91d931e9a02d2583b3c280deec85bdbdd9b1cb26f1eece82
SSDEEP

24576:h4nhDoAFmXsrvR1kSMEkaHnjZVhbBNF1lmZNXLGQ7WczkxFnfbP9u:h+hkbXsjQSME/1Vhb5kNXKQKczgI

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 1 IoCs

Processes:

PO-000172483.exe

pid process

2340 PO-000172483.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

4 drive.google.com
5 drive.google.com
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

PO-000172483.exe

pid process

2936 PO-000172483.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

PO-000172483.exePO-000172483.exe

pid process

2340 PO-000172483.exe
2936 PO-000172483.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

PO-000172483.exe

description pid process target process

PID 2340 set thread context of 2936 2340 PO-000172483.exe PO-000172483.exe

pid	process
2340	PO-000172483.exe

flow	ioc
4	drive.google.com
5	drive.google.com

pid	process
2340	PO-000172483.exe
2936	PO-000172483.exe

description	pid	process	target process
PID 2340 set thread context of 2936	2340	PO-000172483.exe	PO-000172483.exe

Drops file in Program Files directory 2 IoCs

Processes:

PO-000172483.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Common Files\brisantgranatens\baegersvamp.For	PO-000172483.exe
File opened for modification	C:\Program Files (x86)\Common Files\Azonic255\lithoclase.ini	PO-000172483.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

Processes:

PO-000172483.exePO-000172483.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO-000172483.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO-000172483.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

PO-000172483.exe

pid	process
2936	PO-000172483.exe
2936	PO-000172483.exe
2936	PO-000172483.exe
2936	PO-000172483.exe
2936	PO-000172483.exe
2936	PO-000172483.exe
2936	PO-000172483.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

PO-000172483.exe

pid process

2340 PO-000172483.exe

pid	process
2340	PO-000172483.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

PO-000172483.exe

description	pid	process	target process
PID 2340 wrote to memory of 2936	2340	PO-000172483.exe	PO-000172483.exe
PID 2340 wrote to memory of 2936	2340	PO-000172483.exe	PO-000172483.exe
PID 2340 wrote to memory of 2936	2340	PO-000172483.exe	PO-000172483.exe
PID 2340 wrote to memory of 2936	2340	PO-000172483.exe	PO-000172483.exe
PID 2340 wrote to memory of 2936	2340	PO-000172483.exe	PO-000172483.exe
PID 2340 wrote to memory of 2936	2340	PO-000172483.exe	PO-000172483.exe

C:\Users\Admin\AppData\Local\Temp\PO-000172483.exe
"C:\Users\Admin\AppData\Local\Temp\PO-000172483.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2340
- C:\Users\Admin\AppData\Local\Temp\PO-000172483.exe
  "C:\Users\Admin\AppData\Local\Temp\PO-000172483.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2936

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

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Downloads

\Users\Admin\AppData\Local\Temp\nsyCB0E.tmp\System.dll

Filesize
12KB

MD5
d6f54d2cefdf58836805796f55bfc846

SHA1
b980addc1a755b968dd5799179d3b4f1c2de9d2d

SHA256
f917aef484d1fbb4d723b2e2d3045cb6f5f664e61fbb3d5c577bd1c215de55d9

SHA512
ce67da936a93d46ef7e81abc8276787c82fd844c03630ba18afc3528c7e420c3228bfe82aeda083bb719f2d1314afae913362abd1e220cb364606519690d45db

Download Submit
memory/2340-16-0x0000000003C60000-0x0000000004DFD000-memory.dmp

Filesize
17.6MB

Download
memory/2340-18-0x0000000077630000-0x00000000777D9000-memory.dmp

Filesize
1.7MB

Download
memory/2340-17-0x0000000077631000-0x0000000077732000-memory.dmp

Filesize
1.0MB

Download
memory/2340-20-0x0000000003C60000-0x0000000004DFD000-memory.dmp

Filesize
17.6MB

Download
memory/2936-19-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2936-21-0x0000000077630000-0x00000000777D9000-memory.dmp

Filesize
1.7MB

Download
memory/2936-41-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2936-42-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2936-45-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2936-50-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads