guloader | 057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf

General

Target

057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe
Size

901KB
MD5

6cb35cad38c80bbb552c99caf75f9371
SHA1

f1dcc7d9805738aaf1f30b32383674ea30706269
SHA256

057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf
SHA512

638594b7228a8e747c34f1ab7916774feaff1ce58e875e64bb28cc6742472a305c5aa06e709ec708aad990d9e78ce828509af8a575b3fe62082699de1bb81734
SSDEEP

12288:TSlZI9dcNnPmsS7wkJW7DQFeh2FCCMntz6I8128TsXULDh+gDBf6j4Ydcv+l:2lTnpc/J2d2UVf+DLD1BbYGW

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

pid	Process
1396	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe
1396	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe

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

Web Service

T1102

flow	ioc
43	drive.google.com
44	drive.google.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\oecus\svante.Eft	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3356	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1396	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe
3356	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1396 set thread context of 3356	1396	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe	102

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\sankthansaftnerne\clodpoll.saf	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.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
3320	3356	WerFault.exe	102

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	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3356	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe
3356	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1396	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1396 wrote to memory of 3356	1396	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe	102
PID 1396 wrote to memory of 3356	1396	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe	102
PID 1396 wrote to memory of 3356	1396	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe	102
PID 1396 wrote to memory of 3356	1396	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe	102
PID 1396 wrote to memory of 3356	1396	057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe	102

C:\Users\Admin\AppData\Local\Temp\057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe
"C:\Users\Admin\AppData\Local\Temp\057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1396
- C:\Users\Admin\AppData\Local\Temp\057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe
  "C:\Users\Admin\AppData\Local\Temp\057e7554f7a499adfd2c0a3485675fef4f602b23e2e0a1fd4e07da5b993e4ebf.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:3356
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3356 -s 1664
    3⤵
    - Program crash
    PID:3320

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3356 -ip 3356
1⤵
PID:1928

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\nsgA307.tmp\System.dll

Filesize
11KB

MD5
cf85183b87314359488b850f9e97a698

SHA1
6b6c790037eec7ebea4d05590359cb4473f19aea

SHA256
3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac

SHA512
fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

Download Submit
C:\Users\Admin\Desktop\peripheries.lnk

Filesize
872B

MD5
9c2c25f5678f37ccb518d4982267af56

SHA1
c2056c5e49bd0a99d9775e38c55d4d168d3413ca

SHA256
3190dc4b00e8eddc98fe87338ec19403cec90de198a99cc1980a5808fd48f691

SHA512
4c34c004240092cb70a4a9cb5080f65e321e5d88b86170a9cbed682f29336259b6bc3e1b07e7e4f75daadef1b79d546ea3891249d71d40748b9675ddbb6c3ae7

Download Submit
C:\Users\Admin\Desktop\peripheries.lnk

Filesize
842B

MD5
9cab0663473a9a6a7f89882576d4d96d

SHA1
203d54f70fa848c657d253665069161d834a13d2

SHA256
0bf6bf3ecffd712beeab81906f2ca334961a75d8a73dacfcd7740d43df0cf319

SHA512
f9b1b22cf23afbc38a0b8c2173bce1a76604d6b19bdc18580f9f2bb896465cf0c3e3f127d8943e7a359a94eace323ed36bc2ccba97a069e815bbe50eef91ad94

Download Submit
memory/1396-24644-0x00000000032E0000-0x0000000004B4B000-memory.dmp

Filesize
24.4MB

Download
memory/1396-24645-0x00000000032E0000-0x0000000004B4B000-memory.dmp

Filesize
24.4MB

Download
memory/1396-24648-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download
memory/1396-24647-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/1396-24646-0x0000000077A51000-0x0000000077B71000-memory.dmp

Filesize
1.1MB

Download
memory/1396-24649-0x00000000032E0000-0x0000000004B4B000-memory.dmp

Filesize
24.4MB

Download
memory/3356-24653-0x0000000077AF5000-0x0000000077AF6000-memory.dmp

Filesize
4KB

Download
memory/3356-24668-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3356-24652-0x0000000077AD8000-0x0000000077AD9000-memory.dmp

Filesize
4KB

Download
memory/3356-24650-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3356-24663-0x0000000001660000-0x0000000002ECB000-memory.dmp

Filesize
24.4MB

Download
memory/3356-24669-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/3356-24667-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3356-24651-0x0000000001660000-0x0000000002ECB000-memory.dmp

Filesize
24.4MB

Download
memory/3356-24670-0x0000000077A51000-0x0000000077B71000-memory.dmp

Filesize
1.1MB

Download
memory/3356-24671-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3356-24672-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/3356-24673-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3356-24674-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3356-24675-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3356-24676-0x0000000001660000-0x0000000002ECB000-memory.dmp

Filesize
24.4MB

Download

Analysis

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