guloader | a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee

Analysis

max time kernel
145s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
04/07/2024, 01:52

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General

Target
a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe
Size 870KB
Sample240704-caf4yayarp
SHA256 a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee
MD5 95dc64015aa43a27412f7ff0979c5b87
SHA1 bde0ae97f4f98c0dd8a0833702ff073befbec268
SHA512 450a8ba7eb3c3178b5567b692d55518d393af5d971bb22ab13e1c9078c9ea389f1a9e28d391a8882ef8d1b99972ec27af64fa2c7aa8fa79c9c0d2423d0176d10
SSDEEP 12288:XcIjd3nQIQsk3na+QiLPTEYLwdLh5d2tqnXQJgcCp8vGiVIkk84n5QWrV:XcIjUna3iLtwb/2tWXMi2rq7nHB
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

guloader downloader

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 1 IoCs

pid	Process
1224	a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1224	a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe
928	a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1224 set thread context of 928	1224	a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe	81

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\reassigned\sandi.ini	a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1224	a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1224 wrote to memory of 928	1224	a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe	81
PID 1224 wrote to memory of 928	1224	a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe	81
PID 1224 wrote to memory of 928	1224	a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe	81
PID 1224 wrote to memory of 928	1224	a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe	81
PID 1224 wrote to memory of 928	1224	a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe	81

C:\Users\Admin\AppData\Local\Temp\a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe
"C:\Users\Admin\AppData\Local\Temp\a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1224
- C:\Users\Admin\AppData\Local\Temp\a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe
  "C:\Users\Admin\AppData\Local\Temp\a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:928

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

System.dll

Path C:\Users\Admin\AppData\Local\Temp\nsg498E.tmp\System.dll
Size 11KB
SHA256 904fd5481d72f4e03b01a455f848dedd095d0fb17e33608e0d849f5196fb6ff8
MD5 55a26d7800446f1373056064c64c3ce8
SHA1 80256857e9a0a9c8897923b717f3435295a76002
SHA512 04b8ab7a85c26f188c0a06f524488d6f2ac2884bf107c860c82e94ae12c3859f825133d78338fd2b594dfc48f7dc9888ae76fee786c6252a5c77c88755128a5b
SSDEEP 192:MPtkumJX7zBE2kGwfy9S9VkPsFQ1Mx1c:97O2k5q9wA1Mxa
MD5 SHA1 SHA512 SSDEEP

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memory/928-27-0x0000000001700000-0x00000000040A7000-memory.dmp

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memory/928-28-0x00000000004A0000-0x00000000016F4000-memory.dmp

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memory/928-31-0x0000000001700000-0x00000000040A7000-memory.dmp

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memory/1224-24-0x0000000004A30000-0x00000000073D7000-memory.dmp

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memory/1224-25-0x0000000077721000-0x0000000077841000-memory.dmp

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memory/1224-26-0x0000000010004000-0x0000000010005000-memory.dmp

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memory/1224-29-0x0000000004A30000-0x00000000073D7000-memory.dmp

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memory/1224-36-0x0000000004A30000-0x00000000073D7000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads