guloader | 0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4

General

Target

0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe
Size

699KB
MD5

992da08bbb3e1de654a353eed8b8fba4
SHA1

316224c8abb98dbd3e2c908b29fc8ea852549784
SHA256

0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4
SHA512

58a2d6ae10aa4088912fc65257b96722352b002dec68837e03ce02a481569ff31ecdbfed1d5f3db1c70af5c84a14c2706b94a9dff5261db6b040ce353ed6afff
SSDEEP

12288:0QszxdK1xIHkD5/wHpmHfgfTDLeQF+DyWE8N8kkT+KdlDjspRaFhCyiNutx:WwcpmHfgfvC4+WWfN8kkT+Kd9utsn

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
2852	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe

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

Web Service

T1102

flow	ioc
25	drive.google.com
26	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2460	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2852	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe
2460	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2852 set thread context of 2460	2852	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe	96

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\brakehand.Inf120	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.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
4716	2460	WerFault.exe	96

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	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2460	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe
2460	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2852	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2852 wrote to memory of 2460	2852	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe	96
PID 2852 wrote to memory of 2460	2852	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe	96
PID 2852 wrote to memory of 2460	2852	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe	96
PID 2852 wrote to memory of 2460	2852	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe	96
PID 2852 wrote to memory of 2460	2852	0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe	96

C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe
"C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2852
- C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe
  "C:\Users\Admin\AppData\Local\Temp\0b2441e984653fdb0907557a75c1798b13bb62e338c65a554bc3360c5ec5a8a4.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2460
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2460 -s 1552
    3⤵
    - Program crash
    PID:4716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2460 -ip 2460
1⤵
PID:4480

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\nsi826F.tmp\System.dll

Filesize
11KB

MD5
4d3b19a81bd51f8ce44b93643a4e3a99

SHA1
35f8b00e85577b014080df98bd2c378351d9b3e9

SHA256
fda0018ab182ac6025d2fc9a2efcce3745d1da21ce5141859f8286cf319a52ce

SHA512
b2ba9c961c0e1617f802990587a9000979ab5cc493ae2f8ca852eb43eeaf24916b0b29057dbff7d41a1797dfb2dce3db41990e8639b8f205771dbec3fd80f622

Download Submit
memory/2460-35-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2460-20-0x0000000077B45000-0x0000000077B46000-memory.dmp

Filesize
4KB

Download
memory/2460-38-0x0000000001660000-0x0000000003357000-memory.dmp

Filesize
29.0MB

Download
memory/2460-37-0x0000000077AA1000-0x0000000077BC1000-memory.dmp

Filesize
1.1MB

Download
memory/2460-16-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2460-36-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2460-34-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2460-19-0x0000000077B28000-0x0000000077B29000-memory.dmp

Filesize
4KB

Download
memory/2460-18-0x0000000001660000-0x0000000003357000-memory.dmp

Filesize
29.0MB

Download
memory/2460-33-0x0000000001660000-0x0000000003357000-memory.dmp

Filesize
29.0MB

Download
memory/2852-13-0x0000000003080000-0x0000000004D77000-memory.dmp

Filesize
29.0MB

Download
memory/2852-12-0x0000000003080000-0x0000000004D77000-memory.dmp

Filesize
29.0MB

Download
memory/2852-17-0x0000000003080000-0x0000000004D77000-memory.dmp

Filesize
29.0MB

Download
memory/2852-15-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/2852-14-0x0000000077AA1000-0x0000000077BC1000-memory.dmp

Filesize
1.1MB

Download

Analysis

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