guloader | 2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa

General

Target

2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe
Size

813KB
MD5

0526616c9a9fdaadbb1cb7de145cf45b
SHA1

039f2c096d17540376434b4fd48038329b256e03
SHA256

2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa
SHA512

4426fc30be5f3fa28076a14d0739d0f7d84be191d2a579e8e5cd2e2f4c35249ae9222bcbe5f4f03373232e3a8907444cdfdbf995e666f10d477b0119bfb566f5
SSDEEP

24576:GT5ewakMlLQj9cFbRtjD6seSE94Zqq5uIum9u:Ub9ajDVum9u

Score

10^/10

guloader discovery downloader persistence upx

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
1128	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Crink = "C:\\Users\\Admin\\AppData\\Roaming\\Indias\\Rootier.exe"	msiexec.exe

Blocklisted process makes network request 5 IoCs

flow	pid	Process
17	2616	msiexec.exe
19	2616	msiexec.exe
22	2616	msiexec.exe
27	2616	msiexec.exe
31	2616	msiexec.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2616	msiexec.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1128	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe
2616	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1128 set thread context of 2616	1128	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe	85

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2616-302-0x0000000000400000-0x00000000005E4000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\Renegading59.Lau	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\meditance\solvens.uns	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe
File opened for modification	C:\Windows\resources\styrthjelms.ini	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1128	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2616	msiexec.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1128 wrote to memory of 2616	1128	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe	85
PID 1128 wrote to memory of 2616	1128	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe	85
PID 1128 wrote to memory of 2616	1128	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe	85
PID 1128 wrote to memory of 2616	1128	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe	85
PID 1128 wrote to memory of 2616	1128	2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe	85

C:\Users\Admin\AppData\Local\Temp\2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe
"C:\Users\Admin\AppData\Local\Temp\2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.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:1128
- C:\Windows\SysWOW64\msiexec.exe
  "C:\Users\Admin\AppData\Local\Temp\2504ae284627bb65f3d2c32ba7d09f9d6f379eaa85a1712cb3a7cb66baf6a4fa.exe"
  2⤵
  - Adds Run key to start application
  - Blocklisted process makes network request
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2616

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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\nsyC15E.tmp\System.dll

Filesize
12KB

MD5
d968cb2b98b83c03a9f02dd9b8df97dc

SHA1
d784c9b7a92dce58a5038beb62a48ff509e166a0

SHA256
a4ec98011ef99e595912718c1a1bf1aa67bfc2192575729d42f559d01f67b95c

SHA512
2ee41dc68f329a1519a8073ece7d746c9f3bf45d8ef3b915deb376af37e26074134af5f83c8af0fe0ab227f0d1acca9f37e5ca7ae37c46c3bcc0331fe5e2b97e

Download Submit
C:\Windows\Resources\styrthjelms.ini

Filesize
57B

MD5
fd6025a4e37e613fc3b95c4b9dcde998

SHA1
bc9ece04e4a3ea27ed5f6249aa52cbc45d2cb1c3

SHA256
3370956ec8f0d20143598826298e97b6a07ebc7aba20becd4a7545e75847c7a8

SHA512
4c882c456b282b5d16a8257e4f00f26c83df390ac83675c030aceb244cbb44c4350e9c7902fa43613ecfbb1030a9c6ff96fcf4581d2519c23072954d107b36f3

Download Submit
memory/1128-291-0x0000000005520000-0x0000000007E15000-memory.dmp

Filesize
41.0MB

Download
memory/1128-292-0x0000000077011000-0x0000000077131000-memory.dmp

Filesize
1.1MB

Download
memory/1128-293-0x0000000073C65000-0x0000000073C66000-memory.dmp

Filesize
4KB

Download
memory/1128-294-0x0000000005520000-0x0000000007E15000-memory.dmp

Filesize
41.0MB

Download
memory/2616-295-0x0000000000C30000-0x0000000003525000-memory.dmp

Filesize
41.0MB

Download
memory/2616-297-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/2616-301-0x0000000000C30000-0x0000000003525000-memory.dmp

Filesize
41.0MB

Download
memory/2616-302-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads