guloader | 280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552

General

Target

280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe
Size

983KB
MD5

f28c3285968229b7e0c723633fb5c161
SHA1

8be784dccfd84953c94642021a261a4459c68df8
SHA256

280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552
SHA512

3d4fef27b561a06e008d62f66f0b7981395e86a7a2b138110e9e08e7790bc98f038c13a606c0d12d72966fce37effc735ea12a292db959529dd9aaafadf8001c
SSDEEP

24576:9jwKCNPkrUC1yYQemy1+GOj3iQhDzKZukJETb9HLIpk:V1CFkzm/jyrzendJ

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
1668	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe
1668	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe

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

Web Service

T1102

flow	ioc
18	drive.google.com
19	drive.google.com

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
31	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3612	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1668	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe
3612	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1668 set thread context of 3612	1668	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe	88

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
4868	3612	WerFault.exe	88

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	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1668	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3612	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 3612	1668	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe	88
PID 1668 wrote to memory of 3612	1668	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe	88
PID 1668 wrote to memory of 3612	1668	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe	88
PID 1668 wrote to memory of 3612	1668	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe	88
PID 1668 wrote to memory of 3612	1668	280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe	88

C:\Users\Admin\AppData\Local\Temp\280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe
"C:\Users\Admin\AppData\Local\Temp\280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.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:1668
- C:\Users\Admin\AppData\Local\Temp\280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe
  "C:\Users\Admin\AppData\Local\Temp\280344d8a94a23a0e351b1c1553ed3f1ae6db9c06c75ecda292211f5562de552.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:3612
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3612 -s 2288
    3⤵
    - Program crash
    PID:4868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3612 -ip 3612
1⤵
PID:3840

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsfB911.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

Download Submit
memory/1668-13-0x00000000032A0000-0x0000000006194000-memory.dmp

Filesize
47.0MB

Download
memory/1668-14-0x0000000077141000-0x0000000077261000-memory.dmp

Filesize
1.1MB

Download
memory/1668-15-0x0000000073E35000-0x0000000073E36000-memory.dmp

Filesize
4KB

Download
memory/1668-16-0x00000000032A0000-0x0000000006194000-memory.dmp

Filesize
47.0MB

Download
memory/3612-17-0x00000000016E0000-0x00000000045D4000-memory.dmp

Filesize
47.0MB

Download
memory/3612-30-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3612-32-0x00000000016E0000-0x00000000045D4000-memory.dmp

Filesize
47.0MB

Download
memory/3612-31-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3612-33-0x0000000000480000-0x000000000049E000-memory.dmp

Filesize
120KB

Download
memory/3612-34-0x0000000037470000-0x0000000037A14000-memory.dmp

Filesize
5.6MB

Download
memory/3612-35-0x0000000037A20000-0x0000000037ABC000-memory.dmp

Filesize
624KB

Download
memory/3612-38-0x00000000016E0000-0x00000000045D4000-memory.dmp

Filesize
47.0MB

Download

Analysis

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