guloader | 099369eb025c3e23b6669c872ac2572e7bc4ba9200eb4d6318284983ddb78e3f

General

Target

PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
Size

707KB
MD5

b9a03fb0c2c7f23a1e4ccb0d79c5053c
SHA1

4d87c4ed89d8b92f2b6849dc6af6a8850f8e5e7c
SHA256

099369eb025c3e23b6669c872ac2572e7bc4ba9200eb4d6318284983ddb78e3f
SHA512

7b39c7eb08b12f947a2f5fb79f91a7c8fb738fa14c2539db55f207754438f5b340d5ae5219ec1ea6861cb72aad32e04d2b701cc6a34c098e0a780db3607be3d2
SSDEEP

12288:d35ol8MJEBhQRtZZbhhLSbWJgU8UFJ6UibZP9/I7TAWWtQnm:d3kJEBORt7b3Oa2Udi9P9yTB0Qnm

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 2 IoCs

Processes:

PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

pid process

4032 PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
4032 PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

pid process

4680 PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exePurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

pid process

4032 PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
4680 PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

pid	process
4032	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
4032	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

pid	process
4680	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

pid	process
4032	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
4680	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

description	pid	process	target process
PID 4032 set thread context of 4680	4032	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

Drops file in Program Files directory 1 IoCs

Processes:

PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Common Files\nomarch\gratiales.ini	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

Drops file in Windows directory 2 IoCs

Processes:

PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

description	ioc	process
File created	C:\Windows\Fonts\Gullis.lnk	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
File opened for modification	C:\Windows\Fonts\Gullis.lnk	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.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:

PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exePurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

pid process

4680 PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
4680 PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

pid process

4032 PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

pid	process
4680	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
4680	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

pid	process
4032	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

description	pid	process	target process
PID 4032 wrote to memory of 4680	4032	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
PID 4032 wrote to memory of 4680	4032	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
PID 4032 wrote to memory of 4680	4032	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
PID 4032 wrote to memory of 4680	4032	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
PID 4032 wrote to memory of 4680	4032	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe	PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe

C:\Users\Admin\AppData\Local\Temp\PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
"C:\Users\Admin\AppData\Local\Temp\PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4032
- C:\Users\Admin\AppData\Local\Temp\PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe
  "C:\Users\Admin\AppData\Local\Temp\PurchaseOrderPurchaseOrderPurchaseOrderPurchaseOrder.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4680

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nse833B.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
C:\Windows\Fonts\Gullis.lnk

Filesize
1KB

MD5
d36ce364bacbd8a6097f8aaefdc5fc5a

SHA1
5b3a2755ebe88f1d3bce794bf8b0b14ecda883dc

SHA256
59e2f80eab00502504a41a919b0198beae9c0f24b57fa2ab5b2781dba649a7ff

SHA512
973084f19e3b72fc649b0e0c471a4e1fc93f9166f09850c975ecef232f7d7a54653d5c3faf5de888ce2a4c61c867f6b8c91ffef2a6d0f6e8a883e9b1a4a89323

Download Submit
memory/4032-23-0x0000000002AC0000-0x00000000059AA000-memory.dmp

Filesize
46.9MB

Download
memory/4032-18-0x0000000002AC0000-0x00000000059AA000-memory.dmp

Filesize
46.9MB

Download
memory/4032-19-0x0000000002AC0000-0x00000000059AA000-memory.dmp

Filesize
46.9MB

Download
memory/4032-20-0x0000000077981000-0x0000000077AA1000-memory.dmp

Filesize
1.1MB

Download
memory/4032-21-0x0000000074674000-0x0000000074675000-memory.dmp

Filesize
4KB

Download
memory/4680-22-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4680-24-0x0000000001660000-0x000000000454A000-memory.dmp

Filesize
46.9MB

Download
memory/4680-25-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4680-26-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4680-27-0x0000000001660000-0x000000000454A000-memory.dmp

Filesize
46.9MB

Download
memory/4680-28-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4680-29-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads