guloader | 609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494

General

Target

609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe
Size

898KB
MD5

2fef98b5085c1e1fdc201a97ac49c946
SHA1

dffe58633474c3e08f6a4bd2954b0ac9073e4bce
SHA256

609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494
SHA512

02bb114858cabac56f57d979c619e41eb35b9c8de3a288da9eb0c976632df6e6c63e49fd8659ef873316004066546e5813c3e8be01b842897b24d37223925e3a
SSDEEP

24576:ZFZsHTO9u9XKhrmorJ9DrUmK/6axMLZ4/8D1Y7+2:Z3n9i6xJ9PaxM14/8w+2

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
1836	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1284	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1836	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe
1284	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1836 set thread context of 1284	1836	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe	31

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
2644	1284	WerFault.exe	31

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	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1284	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1836	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1836 wrote to memory of 1284	1836	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe	31
PID 1836 wrote to memory of 1284	1836	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe	31
PID 1836 wrote to memory of 1284	1836	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe	31
PID 1836 wrote to memory of 1284	1836	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe	31
PID 1836 wrote to memory of 1284	1836	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe	31
PID 1836 wrote to memory of 1284	1836	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe	31
PID 1284 wrote to memory of 2644	1284	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe	33
PID 1284 wrote to memory of 2644	1284	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe	33
PID 1284 wrote to memory of 2644	1284	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe	33
PID 1284 wrote to memory of 2644	1284	609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe	33

C:\Users\Admin\AppData\Local\Temp\609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe
"C:\Users\Admin\AppData\Local\Temp\609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.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:1836
- C:\Users\Admin\AppData\Local\Temp\609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe
  "C:\Users\Admin\AppData\Local\Temp\609467bc7d0dcd6e9bfb2274d84849c7df9b00937dbf089a5f42c814ab79a494.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1284
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 68
    3⤵
    - Program crash
    PID:2644

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

\Users\Admin\AppData\Local\Temp\nsjC49A.tmp\System.dll

Filesize
12KB

MD5
d968cb2b98b83c03a9f02dd9b8df97dc

SHA1
d784c9b7a92dce58a5038beb62a48ff509e166a0

SHA256
a4ec98011ef99e595912718c1a1bf1aa67bfc2192575729d42f559d01f67b95c

SHA512
2ee41dc68f329a1519a8073ece7d746c9f3bf45d8ef3b915deb376af37e26074134af5f83c8af0fe0ab227f0d1acca9f37e5ca7ae37c46c3bcc0331fe5e2b97e

Download Submit
memory/1284-15-0x0000000076EE0000-0x0000000077089000-memory.dmp

Filesize
1.7MB

Download
memory/1284-14-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1284-16-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1284-18-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1284-20-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1836-10-0x0000000003EA0000-0x000000000663A000-memory.dmp

Filesize
39.6MB

Download
memory/1836-12-0x0000000076EE0000-0x0000000077089000-memory.dmp

Filesize
1.7MB

Download
memory/1836-11-0x0000000076EE1000-0x0000000076FE2000-memory.dmp

Filesize
1.0MB

Download
memory/1836-13-0x0000000003EA0000-0x000000000663A000-memory.dmp

Filesize
39.6MB

Download
memory/1836-19-0x0000000003EA0000-0x000000000663A000-memory.dmp

Filesize
39.6MB

Download

Analysis

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