guloader | 307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d

General

Target

307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe
Size

668KB
MD5

bbde90d159fa822e342aab15eb33b839
SHA1

57386d4b07b978892afce671e674581e300c4593
SHA256

307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d
SHA512

c548f31ca9150e509761338f87edba9fa85dced7afcd2c7e8209feb48ceaf4397b3627c36dbfae5e01cf2faed45e056824cd746bc125b29e4a6de75e2bd3f45b
SSDEEP

12288:hDG4hAuAs9Mp4wSjEL0K5dmMiP1FuCdhq2PtqBA3O:t2nsGej65P2F9Vd+

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
2604	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.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
2672	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2604	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe
2672	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.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	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2604	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2672	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2604 wrote to memory of 2672	2604	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe	29
PID 2604 wrote to memory of 2672	2604	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe	29
PID 2604 wrote to memory of 2672	2604	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe	29
PID 2604 wrote to memory of 2672	2604	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe	29
PID 2604 wrote to memory of 2672	2604	307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe	29

C:\Users\Admin\AppData\Local\Temp\307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe
"C:\Users\Admin\AppData\Local\Temp\307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2604
- C:\Users\Admin\AppData\Local\Temp\307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe
  "C:\Users\Admin\AppData\Local\Temp\307b13c2f8002e88af027d2c549936d08a47d1e3bfa96174d0b5b6cc749f7c3d.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2672

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\metalskiven\gammastraaling.ini

Filesize
7KB

MD5
208b492f269677c290c1d0a3b8435b0b

SHA1
3c3e494d0cc8f175e31ddc9a08dd1e3eca89b34f

SHA256
5a9b8ba78b02b3cc378637ae164f9f55491efa7bec601a2ea86f1016c00f7a3e

SHA512
ed30993831d4dc995ba50dc05cf8f6987c75cb0fcdea79c82236226611a9e86c1b23f24c66d1fb6cffa29a95992893cc11103c81f5d9972f059809319c4a1dcb

Download Submit
\Users\Admin\AppData\Local\Temp\nsuAD90.tmp\System.dll

Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
memory/2604-15-0x00000000038A0000-0x0000000004284000-memory.dmp

Filesize
9.9MB

Download
memory/2604-16-0x00000000038A0000-0x0000000004284000-memory.dmp

Filesize
9.9MB

Download
memory/2604-17-0x0000000077271000-0x0000000077372000-memory.dmp

Filesize
1.0MB

Download
memory/2604-18-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/2604-20-0x00000000038A0000-0x0000000004284000-memory.dmp

Filesize
9.9MB

Download
memory/2672-21-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/2672-22-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2672-28-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2672-29-0x00000000014F0000-0x0000000001ED4000-memory.dmp

Filesize
9.9MB

Download
memory/2672-30-0x0000000000480000-0x000000000049E000-memory.dmp

Filesize
120KB

Download

Analysis

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