guloader | 4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93

Analysis

max time kernel
149s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05-10-2024 01:17

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General

Target

4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe
Size

894KB
MD5

c8c2fa1b682b0bca8ed9de83455e8977
SHA1

ff96ea1f052d0e7745a4fe30bacb8362ea57ba2c
SHA256

4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93
SHA512

d692404d369b4755e760599a50078f0240dd3a5af2af5953ad86d00eaa788c812bed59b22f19c1251bdd192a8d81a10c4d10ec9cc6a15b1e7a44bfb51c20c258
SSDEEP

24576:ZFZsHTO9u9XKhrmod1RYTy7OQJs+45oi4:Z3n9i61RYeiQJBGf4

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
2972	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2972	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe
2916	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2972 set thread context of 2916	2972	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe	30

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	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2972	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2972 wrote to memory of 2916	2972	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe	30
PID 2972 wrote to memory of 2916	2972	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe	30
PID 2972 wrote to memory of 2916	2972	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe	30
PID 2972 wrote to memory of 2916	2972	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe	30
PID 2972 wrote to memory of 2916	2972	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe	30
PID 2972 wrote to memory of 2916	2972	4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe	30

C:\Users\Admin\AppData\Local\Temp\4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe
"C:\Users\Admin\AppData\Local\Temp\4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.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:2972
- C:\Users\Admin\AppData\Local\Temp\4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe
  "C:\Users\Admin\AppData\Local\Temp\4af23250a740fc8e855879c8f0492b8be3613ef015db4347d14885f57e25ee93.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2916

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

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsjAB02.tmp\System.dll

Filesize
12KB

MD5
d968cb2b98b83c03a9f02dd9b8df97dc

SHA1
d784c9b7a92dce58a5038beb62a48ff509e166a0

SHA256
a4ec98011ef99e595912718c1a1bf1aa67bfc2192575729d42f559d01f67b95c

SHA512
2ee41dc68f329a1519a8073ece7d746c9f3bf45d8ef3b915deb376af37e26074134af5f83c8af0fe0ab227f0d1acca9f37e5ca7ae37c46c3bcc0331fe5e2b97e

Download Submit
memory/2916-14-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2916-15-0x00000000779A0000-0x0000000077B49000-memory.dmp

Filesize
1.7MB

Download
memory/2916-17-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2972-10-0x0000000004010000-0x00000000051FA000-memory.dmp

Filesize
17.9MB

Download
memory/2972-11-0x00000000779A1000-0x0000000077AA2000-memory.dmp

Filesize
1.0MB

Download
memory/2972-12-0x00000000779A0000-0x0000000077B49000-memory.dmp

Filesize
1.7MB

Download
memory/2972-13-0x0000000004010000-0x00000000051FA000-memory.dmp

Filesize
17.9MB

Download
memory/2972-28-0x0000000004010000-0x00000000051FA000-memory.dmp

Filesize
17.9MB

Download