guloader | c2882a42e9ad87ef5260d3299307dae39af71853c75b44441c0dec497bc5c175

General

Target

Document#749450pdf.exe
Size

657KB
MD5

15ae90fffd2f5fd0d3c28fdb6a1ed0b5
SHA1

4fd3d2470cd1c1e83bdac50ba103b1550fd5c1b9
SHA256

c2882a42e9ad87ef5260d3299307dae39af71853c75b44441c0dec497bc5c175
SHA512

6491b03ecaceacf0a1d75ac93a65e0ad03bf2e70c45dece60ef9d1cd3b8c3c691de1a13dd713c4f78b0a8a140e336c5344acd6f67ee1eacd799bad51bdba004b
SSDEEP

12288:b7EWNDJccwIWYh7jQofzmAuPMrkQUmGjbPhYYHNZcVbOcNjRtBnMAr87:MUlyYtjQG7uPMrkqnYt6OsNfC7

Score

10^/10

guloader discovery downloader persistence

Malware Config

Signatures

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

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Document#749450pdf.exeDocument#749450pdf.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	Document#749450pdf.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	Document#749450pdf.exe

Loads dropped DLL 1 IoCs

Processes:

Document#749450pdf.exe

pid process

780 Document#749450pdf.exe

pid	process
780	Document#749450pdf.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Document#749450pdf.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	Document#749450pdf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Inconsolately = "C:\\Users\\Admin\\AppData\\Roaming\\Amtsforvaltere\\Kviltningerne90.exe"	Document#749450pdf.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

Document#749450pdf.exe

pid process

1968 Document#749450pdf.exe
1968 Document#749450pdf.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

Document#749450pdf.exeDocument#749450pdf.exe

pid process

780 Document#749450pdf.exe
1968 Document#749450pdf.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

Document#749450pdf.exe

description pid process target process

PID 780 set thread context of 1968 780 Document#749450pdf.exe Document#749450pdf.exe
Drops file in Windows directory 1 IoCs

Processes:

Document#749450pdf.exe

description ioc process

File opened for modification C:\Windows\resources\0409\Vre\Prstekrave\Uskadeliggjort.Pun Document#749450pdf.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

Document#749450pdf.exe

pid process

780 Document#749450pdf.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Document#749450pdf.exe

pid process

1968 Document#749450pdf.exe

pid	process
1968	Document#749450pdf.exe
1968	Document#749450pdf.exe

pid	process
780	Document#749450pdf.exe
1968	Document#749450pdf.exe

description	pid	process	target process
PID 780 set thread context of 1968	780	Document#749450pdf.exe	Document#749450pdf.exe

description	ioc	process
File opened for modification	C:\Windows\resources\0409\Vre\Prstekrave\Uskadeliggjort.Pun	Document#749450pdf.exe

pid	process
780	Document#749450pdf.exe

pid	process
1968	Document#749450pdf.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

Document#749450pdf.exe

description	pid	process	target process
PID 780 wrote to memory of 1968	780	Document#749450pdf.exe	Document#749450pdf.exe
PID 780 wrote to memory of 1968	780	Document#749450pdf.exe	Document#749450pdf.exe
PID 780 wrote to memory of 1968	780	Document#749450pdf.exe	Document#749450pdf.exe
PID 780 wrote to memory of 1968	780	Document#749450pdf.exe	Document#749450pdf.exe
PID 780 wrote to memory of 1968	780	Document#749450pdf.exe	Document#749450pdf.exe

C:\Users\Admin\AppData\Local\Temp\Document#749450pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Document#749450pdf.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:780

C:\Users\Admin\AppData\Local\Temp\Document#749450pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Document#749450pdf.exe"
2⤵
- Checks QEMU agent file
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
PID:1968

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nst8F9.tmp\System.dll
Filesize
11KB

MD5
9625d5b1754bc4ff29281d415d27a0fd

SHA1
80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

SHA256
c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

SHA512
dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

Download Submit
memory/780-54-0x0000000076121000-0x0000000076123000-memory.dmp

Filesize
8KB

Download
memory/780-56-0x0000000002500000-0x000000000314A000-memory.dmp

Filesize
12.3MB

Download
memory/780-73-0x00000000776E0000-0x0000000077860000-memory.dmp

Filesize
1.5MB

Download
memory/780-59-0x0000000077500000-0x00000000776A9000-memory.dmp

Filesize
1.7MB

Download
memory/780-61-0x00000000776E0000-0x0000000077860000-memory.dmp

Filesize
1.5MB

Download
memory/1968-64-0x0000000077500000-0x00000000776A9000-memory.dmp

Filesize
1.7MB

Download
memory/1968-63-0x0000000001470000-0x0000000003B15000-memory.dmp

Filesize
38.6MB

Download
memory/1968-62-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1968-69-0x00000000776E0000-0x0000000077860000-memory.dmp

Filesize
1.5MB

Download
memory/1968-70-0x00000000776E0000-0x0000000077860000-memory.dmp

Filesize
1.5MB

Download
memory/1968-71-0x00000000776E0000-0x0000000077860000-memory.dmp

Filesize
1.5MB

Download
memory/1968-72-0x0000000001470000-0x0000000003B15000-memory.dmp

Filesize
38.6MB

Download
memory/1968-60-0x0000000000403373-mapping.dmp

Download
memory/1968-74-0x0000000077500000-0x00000000776A9000-memory.dmp

Filesize
1.7MB

Download
memory/1968-75-0x00000000776E0000-0x0000000077860000-memory.dmp

Filesize
1.5MB

Download
memory/1968-76-0x00000000776E0000-0x0000000077860000-memory.dmp

Filesize
1.5MB

Download
memory/1968-77-0x00000000776E0000-0x0000000077860000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads