guloader | 2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
06/10/2024, 15:48

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General

Target
2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe
Size 554KB
Sample241006-s85syswekc
SHA256 2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d
MD5 2c5483106fe248cced82541b91cba20e
SHA1 41e69017b26287ee7814bb35a967672ba58cb714
SHA512 4ca40026e8dc3da75c7e68334d268d5b08f568259e597af1fabbd1586f4aaf05c716e17d0bf4c88b68f765fab6ead6965afd73ecb0ead8b97d3ea1fd55d60130
SSDEEP 12288:4aqrw9z7Or5X16gS7U5XzJocC/Uisrk9qKyzpqK:5Kw9zar5lxYUtz2cC/lqVpqK
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
2200	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe

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

Web Service

T1102

flow	ioc
3	drive.google.com
5	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
752	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2200	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe
752	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2200 set thread context of 752	2200	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe	30

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
2772	752	WerFault.exe	30

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	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
752	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2200	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 752	2200	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe	30
PID 2200 wrote to memory of 752	2200	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe	30
PID 2200 wrote to memory of 752	2200	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe	30
PID 2200 wrote to memory of 752	2200	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe	30
PID 2200 wrote to memory of 752	2200	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe	30
PID 2200 wrote to memory of 752	2200	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe	30
PID 752 wrote to memory of 2772	752	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe	33
PID 752 wrote to memory of 2772	752	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe	33
PID 752 wrote to memory of 2772	752	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe	33
PID 752 wrote to memory of 2772	752	2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe	33

C:\Users\Admin\AppData\Local\Temp\2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe
"C:\Users\Admin\AppData\Local\Temp\2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2200
- C:\Users\Admin\AppData\Local\Temp\2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe
  "C:\Users\Admin\AppData\Local\Temp\2702bb251c14965787b39f03a9c41000b9b0421528578e5a6a221ad8b27f182d.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:752
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 752 -s 68
    3⤵
    - Program crash
    PID:2772

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

Gaulin.ini

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Gaulin.ini
Size 37B
SHA256 b4543e8ab4997934d2edc7de8a76a24b7c2ccb641212ae3b9b17fe05b71d3e87
MD5 cfda8e6aade7958f94a959bdb29cb209
SHA1 59c459e105a7af33d13a365f735e3cb7b8e5ddb0
SHA512 edfdca00667ed3a5558f7e614373f0b8393763a979154666972c659cb44e75ccd51170e4e2189043046eb4ddb8a68642bbdb6f98a0e494e76e86faaf14f993b2
MD5 SHA1 SHA512

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System.dll

Path \Users\Admin\AppData\Local\Temp\nsy88A2.tmp\System.dll
Size 11KB
SHA256 f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
MD5 8b3830b9dbf87f84ddd3b26645fed3a0
SHA1 223bef1f19e644a610a0877d01eadc9e28299509
SHA512 d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03
SSDEEP 192:ex24sihno00Wfl97nH6BenXwWobpWBTtvShJ5omi7dJWjOlESlS:h8QIl972eXqlWBFSt273YOlEz
MD5 SHA1 SHA512 SSDEEP

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memory/752-308-0x0000000000400000-0x0000000001462000-memory.dmp

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memory/752-283-0x0000000000400000-0x0000000001462000-memory.dmp

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memory/752-284-0x0000000076DF0000-0x0000000076F99000-memory.dmp

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memory/752-307-0x0000000000400000-0x0000000001462000-memory.dmp

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memory/752-310-0x0000000000400000-0x0000000001462000-memory.dmp

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memory/752-311-0x0000000000400000-0x0000000001462000-memory.dmp

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memory/752-312-0x0000000000400000-0x0000000001462000-memory.dmp

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memory/2200-280-0x0000000076DF1000-0x0000000076EF2000-memory.dmp

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memory/2200-281-0x0000000076DF0000-0x0000000076F99000-memory.dmp

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memory/2200-282-0x00000000036B0000-0x0000000004201000-memory.dmp

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memory/2200-279-0x00000000036B0000-0x0000000004201000-memory.dmp

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memory/2200-309-0x00000000036B0000-0x0000000004201000-memory.dmp

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