guloader | e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b

General

Target

e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe
Size

710KB
MD5

936daa54a6dddd6f59d83e5c150a3b8f
SHA1

bc79bb7cc3f63681c35e6779260ebf025372e429
SHA256

e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b
SHA512

b0daa5db1c8f4abc97ee06e3d4343f5d24f8531977541f4f22811bea20fddb3ca59f094492d9d7c6f3576a026e8f0eef37d5e4392a82d3073f65a0d49a0df6b0
SSDEEP

12288:mrgjBLiIK2WVy/Yqpuz/oU927aQmm7xR2ugcYMsOffhXmmwMRzcLSIHw:m0jBiIK2R/5puz/r927aTmrn8OBXjZcK

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 2 IoCs

pid	Process
1608	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe
1608	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe

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

Web Service

T1102

flow	ioc
20	drive.google.com
21	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
468	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1608	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe
468	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1608 set thread context of 468	1608	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe	92

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
3344	468	WerFault.exe	92

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	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
468	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe
468	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1608	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1608 wrote to memory of 468	1608	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe	92
PID 1608 wrote to memory of 468	1608	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe	92
PID 1608 wrote to memory of 468	1608	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe	92
PID 1608 wrote to memory of 468	1608	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe	92
PID 1608 wrote to memory of 468	1608	e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe	92

C:\Users\Admin\AppData\Local\Temp\e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe
"C:\Users\Admin\AppData\Local\Temp\e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1608
- C:\Users\Admin\AppData\Local\Temp\e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe
  "C:\Users\Admin\AppData\Local\Temp\e1dc693a5e55a541b2db24ed4bcfadb0a5047128ade9f42fdd4f1be2c428a19b.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:468
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 468 -s 1056
    3⤵
    - Program crash
    PID:3344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 468 -ip 468
1⤵
PID:2232

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\nse8FED.tmp\System.dll

Filesize
12KB

MD5
dd87a973e01c5d9f8e0fcc81a0af7c7a

SHA1
c9206ced48d1e5bc648b1d0f54cccc18bf643a14

SHA256
7fb0f8d452fefaac789986b933df050f3d3e4feb8a8d9944ada995f572dcdca1

SHA512
4910b39b1a99622ac8b3c42f173bbe7035ac2f8d40c946468e7db7e2868a2da81ea94da453857f06f39957dd690c7f1ba498936a7aaa0039975e472376f92e8f

Download Submit
memory/468-35-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/468-43-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/468-31-0x0000000001660000-0x0000000002AD6000-memory.dmp

Filesize
20.5MB

Download
memory/468-44-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/468-18-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/468-19-0x0000000001660000-0x0000000002AD6000-memory.dmp

Filesize
20.5MB

Download
memory/468-20-0x0000000077198000-0x0000000077199000-memory.dmp

Filesize
4KB

Download
memory/468-36-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/468-45-0x0000000001660000-0x0000000002AD6000-memory.dmp

Filesize
20.5MB

Download
memory/468-42-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/468-21-0x00000000771B5000-0x00000000771B6000-memory.dmp

Filesize
4KB

Download
memory/468-38-0x0000000077111000-0x0000000077231000-memory.dmp

Filesize
1.1MB

Download
memory/468-37-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/468-39-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/468-40-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/468-41-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1608-15-0x0000000077111000-0x0000000077231000-memory.dmp

Filesize
1.1MB

Download
memory/1608-14-0x00000000031A0000-0x0000000004616000-memory.dmp

Filesize
20.5MB

Download
memory/1608-17-0x00000000031A0000-0x0000000004616000-memory.dmp

Filesize
20.5MB

Download
memory/1608-16-0x00000000745B5000-0x00000000745B6000-memory.dmp

Filesize
4KB

Download

Analysis

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