guloader | ab49c5ba806d4b3aef68b4a70c2ebb261f4b7cd6e74f3ec838c9d59aacf969c5

Analysis

max time kernel
144s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24/05/2024, 12:53

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General

Target
Purchase Order PO05232024.exe
Size 701KB
Sample240524-p4tcksdf2t
SHA256 dd39d251c8d31fdcd410940c7e3a6b1ec76c62b341c60810215da5434d2cb52a
MD5 818e095a728bb7fde8d34c3276c01e15
SHA1 5bc32d174f3dc493312b330d01ceb55e58127f4c
SHA512 3f65fe9b8b0755ae9faad6cd7028fae580e09401de2eb988814292458c256c21ea01ba1e481ecd28c7c8615b0457405b32744be7190bdae58846c300c9ef3672
SSDEEP 12288:bvp1DrAkngRmfxs7u//fARGujCxyIG1TxHhsS14P6bu4:TnDrA/mfWu/gnjNdNhd14CV
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
1868	Purchase Order PO05232024.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1868	Purchase Order PO05232024.exe
4720	Purchase Order PO05232024.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1868 set thread context of 4720	1868	Purchase Order PO05232024.exe	96

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\stanse\selenitic.imp	Purchase Order PO05232024.exe
File opened for modification	C:\Windows\Fonts\humanhood.krs	Purchase Order PO05232024.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
1868	Purchase Order PO05232024.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 4720	1868	Purchase Order PO05232024.exe	96
PID 1868 wrote to memory of 4720	1868	Purchase Order PO05232024.exe	96
PID 1868 wrote to memory of 4720	1868	Purchase Order PO05232024.exe	96
PID 1868 wrote to memory of 4720	1868	Purchase Order PO05232024.exe	96
PID 1868 wrote to memory of 4720	1868	Purchase Order PO05232024.exe	96

C:\Users\Admin\AppData\Local\Temp\Purchase Order PO05232024.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order PO05232024.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1868
- C:\Users\Admin\AppData\Local\Temp\Purchase Order PO05232024.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase Order PO05232024.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:4720

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\nsy4F1B.tmp\System.dll
Size 11KB
SHA256 982c5fb7ada7d8c9bc3e419d1c35da6f05bc5dd845940c179af3a33d00a36a8b
MD5 0ff2d70cfdc8095ea99ca2dabbec3cd7
SHA1 10c51496d37cecd0e8a503a5a9bb2329d9b38116
SHA512 cb5fc0b3194f469b833c2c9abf493fcec5251e8609881b7f5e095b9bd09ed468168e95dda0ba415a7d8d6b7f0dee735467c0ed8e52b223eb5359986891ba6e2e
SSDEEP 192:eK24sihno00Wfl97nH6T2enXwWobpWBTU4VtHT7dmN35OlASl:u8QIl975eXqlWBrz7YLOlA
MD5 SHA1 SHA512 SSDEEP

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memory/1868-9-0x0000000002BF0000-0x0000000005892000-memory.dmp

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memory/1868-10-0x0000000077C81000-0x0000000077DA1000-memory.dmp

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memory/1868-11-0x0000000010004000-0x0000000010005000-memory.dmp

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memory/1868-19-0x0000000002BF0000-0x0000000005892000-memory.dmp

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memory/1868-27-0x0000000002BF0000-0x0000000005892000-memory.dmp

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memory/4720-12-0x0000000001740000-0x00000000043E2000-memory.dmp

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memory/4720-20-0x00000000004E0000-0x0000000001734000-memory.dmp

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memory/4720-22-0x0000000001740000-0x00000000043E2000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads