guloader | 858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c

General

Target

858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe
Size

542KB
MD5

a81990bb342611261db37a0eecab1a3a
SHA1

f848c1ff34bdbb82199de22c4c49d8ebef790031
SHA256

858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c
SHA512

bd6f57bef5b21e651bb7de998640a961a6fabb2fc1073a2aa1867f4feffd405fff127bed2fccbf9f564a977ce938b7a47151c917b7e65a7afb78a71f914e5205
SSDEEP

12288:9bLlN73eJi4xLl7K3m1Ux4kRBA9/PxCGGd/9hKVZFDN:9bzSJikm7BA9/PxOd3KD

Score

10^/10

guloader discovery downloader spyware stealer

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
2380	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Looks up external IP address via web service 3 IoCs

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

flow	ioc
7	reallyfreegeoip.org
8	reallyfreegeoip.org
5	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2228	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2380	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe
2228	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Obediences.Mon	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2380	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2228	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2228	2380	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe	30
PID 2380 wrote to memory of 2228	2380	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe	30
PID 2380 wrote to memory of 2228	2380	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe	30
PID 2380 wrote to memory of 2228	2380	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe	30
PID 2380 wrote to memory of 2228	2380	858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe	30

C:\Users\Admin\AppData\Local\Temp\858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe
"C:\Users\Admin\AppData\Local\Temp\858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Users\Admin\AppData\Local\Temp\858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe
  "C:\Users\Admin\AppData\Local\Temp\858688510aeff9e47282692cccf72d58fe45b6bc128b49f3f5248d11e54f771c.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nstA094.tmp\System.dll

Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
memory/2228-13-0x00000000014F0000-0x0000000004E29000-memory.dmp

Filesize
57.2MB

Download
memory/2228-14-0x00000000774C0000-0x0000000077669000-memory.dmp

Filesize
1.7MB

Download
memory/2228-16-0x00000000774C0000-0x0000000077669000-memory.dmp

Filesize
1.7MB

Download
memory/2228-15-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2228-18-0x0000000000480000-0x000000000049E000-memory.dmp

Filesize
120KB

Download
memory/2228-17-0x00000000014F0000-0x0000000004E29000-memory.dmp

Filesize
57.2MB

Download
memory/2380-12-0x00000000774C0000-0x0000000077669000-memory.dmp

Filesize
1.7MB

Download
memory/2380-11-0x00000000774C1000-0x00000000775C2000-memory.dmp

Filesize
1.0MB

Download

Analysis

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