guloader | 04b8e1297c96a4e1cacb63d2fa2bacfb2f03aec3e4ac052d202e96c1553aa61d

Analysis

max time kernel
143s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
01/06/2024, 02:16

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General

Target
7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe
Size 542KB
Sample240601-cqcfpafb53
SHA256 7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2
MD5 6b70b3711d067ff306ef0b6880aa9b75
SHA1 3e6adcc2187d08da0e22cb8442bf432d4543dbcb
SHA512 91d01e9792613c96037df699f65f508478c151cf47b71461f71d22fcb9df294b49c28085a5479270b0a592747a9af335e132615fbf997ae61e245e2ec381bc04
SSDEEP 12288:AKdIoOp22GL4aC98Xxt9zdzJJmnIprf+r:AKdIlpspWoT3zmI7K
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

guloader downloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
2332	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2332	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2332 set thread context of 3788	2332	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe	99

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Telepatisk.ini	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe
File opened for modification	C:\Program Files (x86)\Fertiliseringerne\imperceptibly.ini	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe
File opened for modification	C:\Program Files (x86)\reliable\aldersbestemmelse.ini	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe
File opened for modification	C:\Program Files (x86)\Common Files\besvimelses.str	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\ingvardts.Sin	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe
File opened for modification	C:\Windows\tasselling\sporvognsskinne.Rev	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2332	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2332 wrote to memory of 3788	2332	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe	99
PID 2332 wrote to memory of 3788	2332	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe	99
PID 2332 wrote to memory of 3788	2332	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe	99
PID 2332 wrote to memory of 3788	2332	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe	99
PID 2332 wrote to memory of 3788	2332	7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe	99

C:\Users\Admin\AppData\Local\Temp\7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe
"C:\Users\Admin\AppData\Local\Temp\7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2332
- C:\Users\Admin\AppData\Local\Temp\7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe
  "C:\Users\Admin\AppData\Local\Temp\7f83f1ace73c0eb3543fd3e15924ecfc69d174e0ad30298b917b74e65a605eb2.exe"
  2⤵
  PID:3788

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4832 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
1⤵
PID:748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

System.dll

Path C:\Users\Admin\AppData\Local\Temp\nsmFCF0.tmp\System.dll
Size 12KB
SHA256 014f1dfeb842cf7265a3644bc6903c592abe9049bfc7396829172d3d72c4d042
MD5 12b140583e3273ee1f65016becea58c4
SHA1 92df24d11797fefd2e1f8d29be9dfd67c56c1ada
SHA512 49ffdfa1941361430b6acb3555fd3aa05e4120f28cbdf7ceaa2af5937d0b8cccd84471cf63f06f97cf203b4aa20f226bdad082e9421b8e6b62ab6e1e9fc1e68a
SSDEEP 192:gFiQJ77pJp17C8F1A5xjGNxrgFOgb7lrT/nC93:E7pJp48F2exrg5F/C
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2332-12-0x0000000004E30000-0x0000000007A27000-memory.dmp

Download

memory/2332-13-0x0000000004E30000-0x0000000007A27000-memory.dmp

Download

memory/2332-14-0x00000000777C1000-0x00000000778E1000-memory.dmp

Download

memory/2332-15-0x0000000074415000-0x0000000074416000-memory.dmp

Download

memory/3788-16-0x0000000000400000-0x0000000001654000-memory.dmp

Download

memory/3788-17-0x0000000001660000-0x0000000004257000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads