guloader | 1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019

General

Target

1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe
Size

672KB
MD5

f73d42881b7d92be154cff027cb90a39
SHA1

497b6abfcd4d89c7e622457ad0ac1409442592a8
SHA256

1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019
SHA512

2e072b55dbd84c5c029fc8a0674736d0044616ba1d6d2e668b5ee7ad30636defb15baa4d3501323b352a5dcf2ce719a6482f05fe6867cc32414879599abb2879
SSDEEP

12288:hDG4hAuAsoM6yD08VfmyVzya788Ek9CeXDVuMNrv:t2nsoMnDNVfLVzfALVe57Nb

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 1 IoCs

pid	Process
2816	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe

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
6	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
484	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2816	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe
484	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.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	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2816	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	484	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2816 wrote to memory of 484	2816	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe	30
PID 2816 wrote to memory of 484	2816	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe	30
PID 2816 wrote to memory of 484	2816	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe	30
PID 2816 wrote to memory of 484	2816	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe	30
PID 2816 wrote to memory of 484	2816	1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe	30

C:\Users\Admin\AppData\Local\Temp\1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe
"C:\Users\Admin\AppData\Local\Temp\1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Users\Admin\AppData\Local\Temp\1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe
  "C:\Users\Admin\AppData\Local\Temp\1f6b4b1a64f758fa24dd62070d9df7c923ec400786e44c9a0f713ab77eae3019.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:484

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

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\nsd869F.tmp\System.dll

Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
memory/484-17-0x00000000014F0000-0x000000000542E000-memory.dmp

Filesize
63.2MB

Download
memory/484-18-0x0000000077900000-0x0000000077AA9000-memory.dmp

Filesize
1.7MB

Download
memory/484-19-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/484-21-0x0000000000480000-0x000000000049E000-memory.dmp

Filesize
120KB

Download
memory/484-20-0x00000000014F0000-0x000000000542E000-memory.dmp

Filesize
63.2MB

Download
memory/2816-16-0x0000000077900000-0x0000000077AA9000-memory.dmp

Filesize
1.7MB

Download
memory/2816-15-0x0000000077901000-0x0000000077A02000-memory.dmp

Filesize
1.0MB

Download

Analysis

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