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

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
1892	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe
1892	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe

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

Web Service

T1102

flow	ioc
15	drive.google.com
16	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
31	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
4564	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1892	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe
4564	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1892 set thread context of 4564	1892	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	84

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
3164	4564	WerFault.exe	84

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
1892	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4564	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1892 wrote to memory of 4564	1892	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	84
PID 1892 wrote to memory of 4564	1892	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	84
PID 1892 wrote to memory of 4564	1892	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	84
PID 1892 wrote to memory of 4564	1892	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	84
PID 1892 wrote to memory of 4564	1892	8a4d38092e7f0245aa376d724cf3dbe08d4b563a86db3c99e70defaa38beb969.exe	84

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:1892
- 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:4564
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4564 -s 2288
    3⤵
    - Program crash
    PID:3164

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4564 -ip 4564
1⤵
PID:1368

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nst7560.tmp\System.dll

Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
memory/1892-14-0x0000000002A60000-0x000000000379F000-memory.dmp

Filesize
13.2MB

Download
memory/1892-15-0x0000000077931000-0x0000000077A51000-memory.dmp

Filesize
1.1MB

Download
memory/1892-16-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/1892-17-0x0000000002A60000-0x000000000379F000-memory.dmp

Filesize
13.2MB

Download
memory/4564-18-0x00000000016C0000-0x00000000023FF000-memory.dmp

Filesize
13.2MB

Download
memory/4564-19-0x00000000779B8000-0x00000000779B9000-memory.dmp

Filesize
4KB

Download
memory/4564-20-0x00000000779D5000-0x00000000779D6000-memory.dmp

Filesize
4KB

Download
memory/4564-33-0x00000000016C0000-0x00000000023FF000-memory.dmp

Filesize
13.2MB

Download
memory/4564-35-0x0000000077931000-0x0000000077A51000-memory.dmp

Filesize
1.1MB

Download
memory/4564-34-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4564-36-0x0000000000460000-0x000000000047E000-memory.dmp

Filesize
120KB

Download
memory/4564-37-0x0000000035250000-0x00000000357F4000-memory.dmp

Filesize
5.6MB

Download
memory/4564-38-0x0000000035800000-0x000000003589C000-memory.dmp

Filesize
624KB

Download
memory/4564-41-0x00000000016C0000-0x00000000023FF000-memory.dmp

Filesize
13.2MB

Download

Analysis

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