guloader | ab49c5ba806d4b3aef68b4a70c2ebb261f4b7cd6e74f3ec838c9d59aacf969c5

Analysis

max time kernel
146s
max time network
152s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24-05-2024 01:36

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General

Target

Purchase Order PO05232024.exe
Size

701KB
MD5

818e095a728bb7fde8d34c3276c01e15
SHA1

5bc32d174f3dc493312b330d01ceb55e58127f4c
SHA256

dd39d251c8d31fdcd410940c7e3a6b1ec76c62b341c60810215da5434d2cb52a
SHA512

3f65fe9b8b0755ae9faad6cd7028fae580e09401de2eb988814292458c256c21ea01ba1e481ecd28c7c8615b0457405b32744be7190bdae58846c300c9ef3672
SSDEEP

12288:bvp1DrAkngRmfxs7u//fARGujCxyIG1TxHhsS14P6bu4:TnDrA/mfWu/gnjNdNhd14CV

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

Processes:

Purchase Order PO05232024.exe

pid process

1460 Purchase Order PO05232024.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

Purchase Order PO05232024.exePurchase Order PO05232024.exe

pid process

1460 Purchase Order PO05232024.exe
2528 Purchase Order PO05232024.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

Purchase Order PO05232024.exe

description pid process target process

PID 1460 set thread context of 2528 1460 Purchase Order PO05232024.exe Purchase Order PO05232024.exe

pid	process
1460	Purchase Order PO05232024.exe

pid	process
1460	Purchase Order PO05232024.exe
2528	Purchase Order PO05232024.exe

description	pid	process	target process
PID 1460 set thread context of 2528	1460	Purchase Order PO05232024.exe	Purchase Order PO05232024.exe

Drops file in Windows directory 2 IoCs

Processes:

Purchase Order PO05232024.exe

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

Processes:

Purchase Order PO05232024.exe

pid process

1460 Purchase Order PO05232024.exe

pid	process
1460	Purchase Order PO05232024.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Purchase Order PO05232024.exe

description	pid	process	target process
PID 1460 wrote to memory of 2528	1460	Purchase Order PO05232024.exe	Purchase Order PO05232024.exe
PID 1460 wrote to memory of 2528	1460	Purchase Order PO05232024.exe	Purchase Order PO05232024.exe
PID 1460 wrote to memory of 2528	1460	Purchase Order PO05232024.exe	Purchase Order PO05232024.exe
PID 1460 wrote to memory of 2528	1460	Purchase Order PO05232024.exe	Purchase Order PO05232024.exe
PID 1460 wrote to memory of 2528	1460	Purchase Order PO05232024.exe	Purchase Order PO05232024.exe
PID 1460 wrote to memory of 2528	1460	Purchase Order PO05232024.exe	Purchase Order PO05232024.exe

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:1460

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:2528

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nst1814.tmp\System.dll
Filesize
11KB

MD5
0ff2d70cfdc8095ea99ca2dabbec3cd7

SHA1
10c51496d37cecd0e8a503a5a9bb2329d9b38116

SHA256
982c5fb7ada7d8c9bc3e419d1c35da6f05bc5dd845940c179af3a33d00a36a8b

SHA512
cb5fc0b3194f469b833c2c9abf493fcec5251e8609881b7f5e095b9bd09ed468168e95dda0ba415a7d8d6b7f0dee735467c0ed8e52b223eb5359986891ba6e2e

Download Submit
memory/1460-10-0x0000000002FD0000-0x0000000005C72000-memory.dmp

Filesize
44.6MB

Download
memory/1460-11-0x0000000077801000-0x0000000077902000-memory.dmp

Filesize
1.0MB

Download
memory/1460-12-0x0000000077800000-0x00000000779A9000-memory.dmp

Filesize
1.7MB

Download
memory/1460-13-0x0000000002FD0000-0x0000000005C72000-memory.dmp

Filesize
44.6MB

Download
memory/1460-21-0x0000000002FD0000-0x0000000005C72000-memory.dmp

Filesize
44.6MB

Download
memory/2528-14-0x0000000077800000-0x00000000779A9000-memory.dmp

Filesize
1.7MB

Download
memory/2528-15-0x00000000004E0000-0x0000000001542000-memory.dmp

Filesize
16.4MB

Download