guloader | 5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5

General

Target

5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe
Size

553KB
MD5

d1f841d041c915f803dbe6c15b19c510
SHA1

85190628be4d7ed332737df38a580455e29155e1
SHA256

5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5
SHA512

d8a06b312a5f5f6f37e46bee7c360eb32397be08af636699ba5babca7ff61c651fa950093a410eab21ad854012ad765a803735a5c39c1dab39a4aecf6ae107ac
SSDEEP

12288:qX6pZB10nk2cxhmCVvEIM/XHgeewr+Nc20PJbbiEUW34/:qX6pZ+jMh3EIM/LPBqEUW

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
3444	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\hulas.flo	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2608	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3444	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe
2608	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3444 set thread context of 2608	3444	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe	87

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4844	2608	WerFault.exe	87

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2608	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe
2608	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3444	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3444 wrote to memory of 2608	3444	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe	87
PID 3444 wrote to memory of 2608	3444	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe	87
PID 3444 wrote to memory of 2608	3444	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe	87
PID 3444 wrote to memory of 2608	3444	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe	87
PID 3444 wrote to memory of 2608	3444	5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe	87

C:\Users\Admin\AppData\Local\Temp\5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe
"C:\Users\Admin\AppData\Local\Temp\5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3444
- C:\Users\Admin\AppData\Local\Temp\5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe
  "C:\Users\Admin\AppData\Local\Temp\5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2608
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2608 -s 1588
    3⤵
    - Program crash
    PID:4844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2608 -ip 2608
1⤵
PID:4396

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsoA858.tmp\System.dll

Filesize
12KB

MD5
4add245d4ba34b04f213409bfe504c07

SHA1
ef756d6581d70e87d58cc4982e3f4d18e0ea5b09

SHA256
9111099efe9d5c9b391dc132b2faf0a3851a760d4106d5368e30ac744eb42706

SHA512
1bd260cabe5ea3cefbbc675162f30092ab157893510f45a1b571489e03ebb2903c55f64f89812754d3fe03c8f10012b8078d1261a7e73ac1f87c82f714bce03d

Download Submit
memory/2608-17-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2608-30-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2608-29-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2608-31-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/2608-16-0x0000000001660000-0x000000000371C000-memory.dmp

Filesize
32.7MB

Download
memory/2608-27-0x0000000077821000-0x0000000077941000-memory.dmp

Filesize
1.1MB

Download
memory/2608-18-0x00000000778A8000-0x00000000778A9000-memory.dmp

Filesize
4KB

Download
memory/2608-19-0x00000000778C5000-0x00000000778C6000-memory.dmp

Filesize
4KB

Download
memory/2608-23-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2608-24-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2608-25-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/2608-28-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3444-15-0x0000000074505000-0x0000000074506000-memory.dmp

Filesize
4KB

Download
memory/3444-26-0x0000000004970000-0x0000000006A2C000-memory.dmp

Filesize
32.7MB

Download
memory/3444-13-0x0000000004970000-0x0000000006A2C000-memory.dmp

Filesize
32.7MB

Download
memory/3444-14-0x0000000077821000-0x0000000077941000-memory.dmp

Filesize
1.1MB

Download
memory/3444-12-0x0000000004970000-0x0000000006A2C000-memory.dmp

Filesize
32.7MB

Download

Analysis

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