guloader | 3111cc3de9babb4f7fa375cdd32ef0f96f80c66e629843559fd05ac7461f479c

General

Target

9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe
Size

618KB
MD5

18fb2cccaa9ac71624eaceada006e938
SHA1

a25055a3b29ce0ee64d7e20eccced0f72ec737db
SHA256

9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e
SHA512

5828d7ee60e66afac8d3650930ed8556adc9693ab32ca872cc16f71382568baa471827cee1162393b7bce2c725965bd92377e7960225e43e00aef87754a2215d
SSDEEP

6144:SyI5s2239XH7ySqrVWOqnBRryl2sIgghQtUnQl8uFfKIn4jma8LIwJzSdfoVLg68:H22tH7L0kel2sInQDlxnPn906OLhsI

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
4880	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe

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

Web Service

T1102

flow	ioc
2	drive.google.com
3	drive.google.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\nonsurgically\skmbillede.smr	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4280	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4880	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe
4280	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4880 set thread context of 4280	4880	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe	74

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Fljtenists.ini	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe

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
292	4280	WerFault.exe	74

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	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4280	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe
4280	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4880	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4880 wrote to memory of 4280	4880	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe	74
PID 4880 wrote to memory of 4280	4880	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe	74
PID 4880 wrote to memory of 4280	4880	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe	74
PID 4880 wrote to memory of 4280	4880	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe	74
PID 4880 wrote to memory of 4280	4880	9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe	74

C:\Users\Admin\AppData\Local\Temp\9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe
"C:\Users\Admin\AppData\Local\Temp\9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4880
- C:\Users\Admin\AppData\Local\Temp\9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe
  "C:\Users\Admin\AppData\Local\Temp\9b00715d77438200a4f54fa8f47ac17aab0cc166e95fc6737c2a78021b69a64e.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4280
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4280 -s 1672
    3⤵
    - Program crash
    PID:292

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

\Users\Admin\AppData\Local\Temp\nsh64C6.tmp\System.dll

Filesize
11KB

MD5
3f176d1ee13b0d7d6bd92e1c7a0b9bae

SHA1
fe582246792774c2c9dd15639ffa0aca90d6fd0b

SHA256
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

SHA512
0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

Download Submit
memory/4280-14-0x0000000000400000-0x0000000001783000-memory.dmp

Filesize
19.5MB

Download
memory/4280-16-0x00007FFA80D50000-0x00007FFA80F2B000-memory.dmp

Filesize
1.9MB

Download
memory/4280-31-0x0000000000400000-0x0000000001783000-memory.dmp

Filesize
19.5MB

Download
memory/4280-33-0x0000000000400000-0x0000000001783000-memory.dmp

Filesize
19.5MB

Download
memory/4280-35-0x0000000000400000-0x0000000001783000-memory.dmp

Filesize
19.5MB

Download
memory/4880-10-0x0000000002AA0000-0x00000000034F0000-memory.dmp

Filesize
10.3MB

Download
memory/4880-11-0x00007FFA80D51000-0x00007FFA80E5F000-memory.dmp

Filesize
1.1MB

Download
memory/4880-12-0x00007FFA80D50000-0x00007FFA80F2B000-memory.dmp

Filesize
1.9MB

Download
memory/4880-13-0x0000000002AA0000-0x00000000034F0000-memory.dmp

Filesize
10.3MB

Download
memory/4880-34-0x0000000002AA0000-0x00000000034F0000-memory.dmp

Filesize
10.3MB

Download

Analysis

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