guloader | 2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939

General

Target

2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe
Size

596KB
MD5

a37af26ae26b63490edd76beab0dbf8b
SHA1

f312edc243e20a46175b570aef59ef2c1ec87b8d
SHA256

2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939
SHA512

f55fc52553226defeea8f8f93b2f082917cc1cd07c95ff7b5ec8e76e2a646f7725b9e4d200c0fbc67f150c97c565cf3f2fef749b5b41ca2ad1ada60fb19dcd20
SSDEEP

12288:v22twSEXbeu5UtNK4zDdnPORvgwnBTSwLS906OL8:v22tBErr5KKCxPWJBeoP6OY

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
4948	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
18	drive.google.com
17	drive.google.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\nonsurgically\skmbillede.smr	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4264	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4948	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe
4264	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4948 set thread context of 4264	4948	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe	87

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Fljtenists.ini	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe

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
5016	4264	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	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4264	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe
4264	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4948	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4948 wrote to memory of 4264	4948	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe	87
PID 4948 wrote to memory of 4264	4948	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe	87
PID 4948 wrote to memory of 4264	4948	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe	87
PID 4948 wrote to memory of 4264	4948	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe	87
PID 4948 wrote to memory of 4264	4948	2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe	87

C:\Users\Admin\AppData\Local\Temp\2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe
"C:\Users\Admin\AppData\Local\Temp\2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Users\Admin\AppData\Local\Temp\2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe
  "C:\Users\Admin\AppData\Local\Temp\2fe668d613b90d65a43c7d1c476fa44a55e41873b5f954d20e937326afe52939.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4264
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4264 -s 1772
    3⤵
    - Program crash
    PID:5016

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4264 -ip 4264
1⤵
PID:932

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

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsm7E49.tmp\System.dll

Filesize
11KB

MD5
3f176d1ee13b0d7d6bd92e1c7a0b9bae

SHA1
fe582246792774c2c9dd15639ffa0aca90d6fd0b

SHA256
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

SHA512
0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

Download Submit
memory/4264-34-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4264-39-0x0000000001660000-0x0000000003322000-memory.dmp

Filesize
28.8MB

Download
memory/4264-37-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4264-36-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4264-35-0x0000000077AF1000-0x0000000077C11000-memory.dmp

Filesize
1.1MB

Download
memory/4264-15-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4264-16-0x0000000001660000-0x0000000003322000-memory.dmp

Filesize
28.8MB

Download
memory/4264-17-0x0000000077B78000-0x0000000077B79000-memory.dmp

Filesize
4KB

Download
memory/4264-18-0x0000000077B95000-0x0000000077B96000-memory.dmp

Filesize
4KB

Download
memory/4264-31-0x0000000001660000-0x0000000003322000-memory.dmp

Filesize
28.8MB

Download
memory/4264-32-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4948-14-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/4948-33-0x0000000002C60000-0x0000000004922000-memory.dmp

Filesize
28.8MB

Download
memory/4948-13-0x0000000077AF1000-0x0000000077C11000-memory.dmp

Filesize
1.1MB

Download
memory/4948-12-0x0000000077AF1000-0x0000000077C11000-memory.dmp

Filesize
1.1MB

Download
memory/4948-11-0x0000000002C60000-0x0000000004922000-memory.dmp

Filesize
28.8MB

Download
memory/4948-10-0x0000000002C60000-0x0000000004922000-memory.dmp

Filesize
28.8MB

Download

Analysis

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