guloader | 30823a9377ba0f858b013c4ecf73c497e89fd3b198dfcaeb92cd719050c1ded7

General

Target

8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe
Size

466KB
MD5

745504717878bb22b600df7e2c2dd9f4
SHA1

9515d0277803511a4f401674f40f022ed69c85d7
SHA256

8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969
SHA512

8035ff6f18deaaec620acd824bbcecf07d38f2e2f77e322942f635320af75bbc4bd60250f0e61094eed22cfeef652791d61476bd7b4c613ebb6fb7952ae48e4d
SSDEEP

12288:I5AlMIL/obq71R7Oj6rgcPIcXuQd7lxu7Jj1JK8s5FEeKN:ZtL/o2BR7Zrgcwgpxu7Jj1Jiceg

Score

10^/10

guloader discovery downloader evasion spyware stealer

Malware Config

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Disables Task Manager via registry modification
evasion

Loads dropped DLL 2 IoCs

pid	Process
2500	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe
2500	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.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

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

Web Service

T1102

flow	ioc
5	drive.google.com
4	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
14	checkip.dyndns.org

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\hjemmecomputeren.Pot	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1668	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2500	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe
1668	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2500 set thread context of 1668	2500	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	30

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	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2500	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1668	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2500 wrote to memory of 1668	2500	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	30
PID 2500 wrote to memory of 1668	2500	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	30
PID 2500 wrote to memory of 1668	2500	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	30
PID 2500 wrote to memory of 1668	2500	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	30
PID 2500 wrote to memory of 1668	2500	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	30
PID 2500 wrote to memory of 1668	2500	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	30

C:\Users\Admin\AppData\Local\Temp\8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe
"C:\Users\Admin\AppData\Local\Temp\8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2500
- C:\Users\Admin\AppData\Local\Temp\8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe
  "C:\Users\Admin\AppData\Local\Temp\8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1668

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

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsjB55C.tmp\System.dll

Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
memory/1668-19-0x00000000773C0000-0x0000000077569000-memory.dmp

Filesize
1.7MB

Download
memory/1668-40-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/1668-41-0x0000000000460000-0x000000000047E000-memory.dmp

Filesize
120KB

Download
memory/2500-16-0x0000000002CE0000-0x0000000003A1F000-memory.dmp

Filesize
13.2MB

Download
memory/2500-18-0x00000000773C0000-0x0000000077569000-memory.dmp

Filesize
1.7MB

Download
memory/2500-17-0x00000000773C1000-0x00000000774C2000-memory.dmp

Filesize
1.0MB

Download
memory/2500-20-0x0000000002CE0000-0x0000000003A1F000-memory.dmp

Filesize
13.2MB

Download

Analysis

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