guloader | 1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019

General

Target

PO1302202500018273645.exe
Size

672KB
MD5

f73d42881b7d92be154cff027cb90a39
SHA1

497b6abfcd4d89c7e622457ad0ac1409442592a8
SHA256

1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019
SHA512

2e072b55dbd84c5c029fc8a0674736d0044616ba1d6d2e668b5ee7ad30636defb15baa4d3501323b352a5dcf2ce719a6482f05fe6867cc32414879599abb2879
SSDEEP

12288:hDG4hAuAsoM6yD08VfmyVzya788Ek9CeXDVuMNrv:t2nsoMnDNVfLVzfALVe57Nb

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
2396	PO1302202500018273645.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
6	checkip.dyndns.org
8	reallyfreegeoip.org
9	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2648	PO1302202500018273645.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2396	PO1302202500018273645.exe
2648	PO1302202500018273645.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	PO1302202500018273645.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO1302202500018273645.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2396	PO1302202500018273645.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2648	PO1302202500018273645.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2396 wrote to memory of 2648	2396	PO1302202500018273645.exe	29
PID 2396 wrote to memory of 2648	2396	PO1302202500018273645.exe	29
PID 2396 wrote to memory of 2648	2396	PO1302202500018273645.exe	29
PID 2396 wrote to memory of 2648	2396	PO1302202500018273645.exe	29
PID 2396 wrote to memory of 2648	2396	PO1302202500018273645.exe	29

C:\Users\Admin\AppData\Local\Temp\PO1302202500018273645.exe
"C:\Users\Admin\AppData\Local\Temp\PO1302202500018273645.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2396
- C:\Users\Admin\AppData\Local\Temp\PO1302202500018273645.exe
  "C:\Users\Admin\AppData\Local\Temp\PO1302202500018273645.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2648

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

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Skullcaps\gammastraaling.ini

Filesize
7KB

MD5
208b492f269677c290c1d0a3b8435b0b

SHA1
3c3e494d0cc8f175e31ddc9a08dd1e3eca89b34f

SHA256
5a9b8ba78b02b3cc378637ae164f9f55491efa7bec601a2ea86f1016c00f7a3e

SHA512
ed30993831d4dc995ba50dc05cf8f6987c75cb0fcdea79c82236226611a9e86c1b23f24c66d1fb6cffa29a95992893cc11103c81f5d9972f059809319c4a1dcb

Download Submit
\Users\Admin\AppData\Local\Temp\nse9C70.tmp\System.dll

Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
memory/2396-15-0x0000000077271000-0x0000000077372000-memory.dmp

Filesize
1.0MB

Download
memory/2396-16-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/2648-17-0x00000000014F0000-0x000000000542E000-memory.dmp

Filesize
63.2MB

Download
memory/2648-18-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/2648-20-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2648-21-0x00000000014F0000-0x000000000542E000-memory.dmp

Filesize
63.2MB

Download
memory/2648-22-0x0000000000480000-0x000000000049E000-memory.dmp

Filesize
120KB

Download

Analysis

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