guloader | df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f

General

Target

df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe
Size

1.0MB
MD5

57a8326258e722638fdfab7715e94356
SHA1

ae16c7ecb431ad5775bd0b00c39117756431422b
SHA256

df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f
SHA512

9fbf9f21a79a7b02aeb4a51c54394a67ed9d394b0895c4c6f3c9022e6631c1f66f63e2df0eefcbd64164e9b949a001746bf14c2648dfd2f691e673d62cf2b8a3
SSDEEP

24576:9jwKCNucluh8HfWRd7aEIRYO0sCaHfToikFhZD1fJAj1:V1CVqyfi7a2O0RniAZD/a1

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
4684	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe
4684	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe

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

Web Service

T1102

flow	ioc
15	drive.google.com
14	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
27	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
396	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4684	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe
396	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4684 set thread context of 396	4684	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe	82

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
2656	396	WerFault.exe	82

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	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4684	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	396	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4684 wrote to memory of 396	4684	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe	82
PID 4684 wrote to memory of 396	4684	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe	82
PID 4684 wrote to memory of 396	4684	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe	82
PID 4684 wrote to memory of 396	4684	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe	82
PID 4684 wrote to memory of 396	4684	df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe	82

C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe
"C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.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:4684
- C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe
  "C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:396
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 396 -s 2272
    3⤵
    - Program crash
    PID:2656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 376 -p 396 -ip 396
1⤵
PID:4752

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\nsz78DB.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

Download Submit
memory/396-17-0x00000000016E0000-0x00000000040F6000-memory.dmp

Filesize
42.1MB

Download
memory/396-30-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/396-31-0x0000000000480000-0x000000000049E000-memory.dmp

Filesize
120KB

Download
memory/396-33-0x0000000037270000-0x000000003730C000-memory.dmp

Filesize
624KB

Download
memory/396-32-0x0000000036CC0000-0x0000000037264000-memory.dmp

Filesize
5.6MB

Download
memory/396-35-0x00000000016E0000-0x00000000040F6000-memory.dmp

Filesize
42.1MB

Download
memory/4684-13-0x00000000032A0000-0x0000000005CB6000-memory.dmp

Filesize
42.1MB

Download
memory/4684-14-0x0000000077B01000-0x0000000077C21000-memory.dmp

Filesize
1.1MB

Download
memory/4684-15-0x00000000747F5000-0x00000000747F6000-memory.dmp

Filesize
4KB

Download
memory/4684-16-0x00000000032A0000-0x0000000005CB6000-memory.dmp

Filesize
42.1MB

Download

Analysis

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