guloader | 41063585eec1a621b5bc4a18f0d3357ce0ef525e3da21ed00c48fd00c9995a26

General

Target

2435433.cmd
Size

1.4MB
MD5

9c9536010d9af231f17acc84538df07f
SHA1

67f9f971395e8d8ffcd2568c5ec7b29f4f27d4cf
SHA256

27eefc56a98faa80d9c9156d351a99408dd35d2e899a8a3e8b34d56e740f3334
SHA512

6f89a9750fd6ca4092ae701b65abcd5ca95bf2e0c2b99403cd4d4ca99c887c3dc40bdffd90cf9c991d20a854b4db16b84e40156380b45ec1be48359f4a8389e4
SSDEEP

24576:aindj4JTlehuO9XnxLD8tGAFIVodVWCFL6JCW2pDt4K:j4+Vxqqo5FGA3

Score

10^/10

guloader discovery downloader execution

Malware Config

Signatures

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

Downloads MZ/PE file 1 IoCs

flow	pid	Process
34	3432	Process not Found

Executes dropped EXE 1 IoCs

pid	Process
4752	maxthon.pif

Loads dropped DLL 7 IoCs

pid	Process
4752	maxthon.pif
4752	maxthon.pif
4752	maxthon.pif
4752	maxthon.pif
4752	maxthon.pif
4752	maxthon.pif
1784	maxthon.pif

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

Web Service

T1102

flow	ioc
13	drive.google.com
14	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1784	maxthon.pif

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4752	maxthon.pif
1784	maxthon.pif

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
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 3 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	maxthon.pif
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	maxthon.pif
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1956	MicrosoftEdgeUpdate.exe

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral2/files/0x000500000001ec1c-16604.dat	nsis_installer_1
behavioral2/files/0x000500000001ec1c-16604.dat	nsis_installer_2

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
1784	maxthon.pif
1784	maxthon.pif
1784	maxthon.pif
1784	maxthon.pif
1784	maxthon.pif
1784	maxthon.pif
1784	maxthon.pif
1784	maxthon.pif
1784	maxthon.pif
1784	maxthon.pif
1784	maxthon.pif
1784	maxthon.pif
1784	maxthon.pif
1784	maxthon.pif

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4752	maxthon.pif

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3968 wrote to memory of 1664	3968	cmd.exe	88
PID 3968 wrote to memory of 1664	3968	cmd.exe	88
PID 3968 wrote to memory of 4752	3968	cmd.exe	89
PID 3968 wrote to memory of 4752	3968	cmd.exe	89
PID 3968 wrote to memory of 4752	3968	cmd.exe	89
PID 4752 wrote to memory of 1784	4752	maxthon.pif	90
PID 4752 wrote to memory of 1784	4752	maxthon.pif	90
PID 4752 wrote to memory of 1784	4752	maxthon.pif	90
PID 4752 wrote to memory of 1784	4752	maxthon.pif	90

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\2435433.cmd"
1⤵
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Windows\system32\cscript.exe
  cscript p.js
  2⤵
  PID:1664
- C:\Users\Admin\AppData\Local\Temp\maxthon.pif
  maxthon.pif
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4752
- - C:\Users\Admin\AppData\Local\Temp\maxthon.pif
    maxthon.pif
    3⤵
    - Loads dropped DLL
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1784

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIwIiBpbnN0YWxsZGF0ZXRpbWU9IjE3MzkyODMzNzEiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4Mzc1NDE5Mjc1MzAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1Njk5Njc2ODE2Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:1956

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

JavaScript

1

T1059.007

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\furriery.ini

Filesize
38B

MD5
b1ef763e50c5aabcdf24507256cdecb5

SHA1
544323e0812a2d71bc5e156e42bbe25f6082afab

SHA256
65724906ac58f577bd6b805237a1d03107bd94276121ef81e1fbfd368672abb4

SHA512
71c29b23cc8d2f16bb9f4667d25a7d01cf593134425359fc735c6056d154addb113dce0a9899f90d0dac4b3e46a3849fdee9190f3bf067fdba3b89f5b1170c67

Download Submit
C:\Users\Admin\AppData\Local\Temp\maxthon.pif

Filesize
935KB

MD5
b2133aba6fde5e6b68bb3f5b1ed8ed29

SHA1
cce05c4dfe8286601e5e36d1d2f2486758cd53d1

SHA256
0cd8b00f33a98cc494f251b51a95d4454f2bee979dbee98555accee3dfe37db4

SHA512
3c51c879a3fdeff67b2b29a08fb0c48cfd83a4331832313c75df692fd429d89e24481c67ed7829a9de3c01c3ebabcd0d42459bbd3fa5b5713545568543bd1813

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsdA4C8.tmp\LangDLL.dll

Filesize
5KB

MD5
b21a3377e66b941df6d5b7cf8ba7a43a

SHA1
e7ed27fce2db9cdc11ca3c640806731dcef3864a

SHA256
ba46a03088f690ce966043f49761ff3a3a0dca236160794de841dfecc3588d1e

SHA512
f011a824c0ff7f87c6da112898f4afc87e12c5b39fb40ffcc0955012e79a4302597d892224b3b47e8143480605c73275d3799d6d2000cdf179c2912241f86916

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsdA4C8.tmp\System.dll

Filesize
12KB

MD5
792b6f86e296d3904285b2bf67ccd7e0

SHA1
966b16f84697552747e0ddd19a4ba8ab5083af31

SHA256
c7a20bcaa0197aedddc8e4797bbb33fdf70d980f5e83c203d148121c2106d917

SHA512
97edc3410b88ca31abc0af0324258d2b59127047810947d0fb5e7e12957db34d206ffd70a0456add3a26b0546643ff0234124b08423c2c9ffe9bdec6eb210f2c

Download Submit
C:\Users\Admin\AppData\Local\Temp\p.js

Filesize
454B

MD5
512de64f32a0387d27f0d77251ea264c

SHA1
1f394a3cff8a9c0d7b5126859ec10356b9885cc4

SHA256
fc89b98b929495596a34a2dff20fe6100c79b730d7e5734d0bf7f0c001a5ad7d

SHA512
8b9f78ad373c1e11f441ef6fa9ea1d57776e11a1c0e39bc6de92aeba95a6d0c5228942869abd3e7ff82ca66b59545a9e8c0c5f6281b79baf3dbc7cfd933cabe9

Download Submit
C:\Users\Admin\AppData\Local\Temp\x

Filesize
1.3MB

MD5
ba1ce6811dc9aaa05b7d4cdfb7ae968a

SHA1
29a5707e4e64373a5078d681a2298606a3114e37

SHA256
a37670491331e8cffeb8c3f88cf0b6a370c2194e7a7defa9edded3fa3a0ad584

SHA512
c1148d1f44b4a1aacfb7e742b16b6c1440953cac403dfcdb5db84506bbe739a1657017724f64d6d147c6d711ddbe1a11cdd3d89c1a1ea2b266cef644e5f534f5

Download Submit
C:\Users\Admin\AppData\Local\Temp\x

Filesize
4KB

MD5
41a97e1be224a10b5d85c299777be2f5

SHA1
17b3fa04e615ca25dd3df863cf6f4cd44a8e1559

SHA256
45f6ff5579c3f4d01e9b098f96c5cc080ce1eba19f97231f95bcf152fd097ec6

SHA512
e93f28c2dc56a92f06f53e6ef9851bdc901f62dec94d784e0e85f3e1d4d23c37b36cd58368d865cc1c5b92cbc6460d74923be74abdbc889929c6e1b4488e097d

Download Submit
memory/1784-16660-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1784-16659-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1784-16657-0x0000000001660000-0x0000000005BD7000-memory.dmp

Filesize
69.5MB

Download
memory/1784-16675-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1784-16676-0x0000000001660000-0x0000000005BD7000-memory.dmp

Filesize
69.5MB

Download
memory/1784-16677-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1784-16678-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1784-16681-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4752-16656-0x0000000073625000-0x0000000073626000-memory.dmp

Filesize
4KB

Download
memory/4752-16655-0x0000000077161000-0x0000000077281000-memory.dmp

Filesize
1.1MB

Download
memory/4752-16654-0x0000000077161000-0x0000000077281000-memory.dmp

Filesize
1.1MB

Download

Analysis

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