guloader | 1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53

Analysis

max time kernel
120s
max time network
126s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
17-12-2024 19:22

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General

Target

1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe
Size

759KB
MD5

e1dc71be5b3466d47a4934013be9b604
SHA1

4c6627a901ade3b1f0cd6a233085deb7e044ef97
SHA256

1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53
SHA512

a44f75ea0eac848dd2b724b9a50fb5b0259382f61a047563689381e3a60fc07547c209b2acdddcb1dae371cdf51f0065e2a89ff0276299c0d72928af87c9aafc
SSDEEP

12288:GtomEHbPQsIbw8Z9TzDBWzowh0Nxj5gUZVroN64V23i3Qo+eSp5:TN7PXIdZlDBWUrx5gAVroNFHzU

Score

10^/10

guloader remcos remotehost discovery downloader rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

162.251.122.87:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-UOMZ21
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Loads dropped DLL 2 IoCs

pid	Process
2652	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe
2652	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2136	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2652	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe
2136	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2652 set thread context of 2136	2652	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.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
1848	2136	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	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2652	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2652 wrote to memory of 2136	2652	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe	31
PID 2652 wrote to memory of 2136	2652	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe	31
PID 2652 wrote to memory of 2136	2652	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe	31
PID 2652 wrote to memory of 2136	2652	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe	31
PID 2652 wrote to memory of 2136	2652	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe	31
PID 2652 wrote to memory of 2136	2652	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe	31
PID 2136 wrote to memory of 1848	2136	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe	32
PID 2136 wrote to memory of 1848	2136	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe	32
PID 2136 wrote to memory of 1848	2136	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe	32
PID 2136 wrote to memory of 1848	2136	1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe	32

C:\Users\Admin\AppData\Local\Temp\1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe
"C:\Users\Admin\AppData\Local\Temp\1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.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:2652
- C:\Users\Admin\AppData\Local\Temp\1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe
  "C:\Users\Admin\AppData\Local\Temp\1352efe35374bcc94f0b4e189761610a8620ff63aad350060a806773c969fd53.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2136
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2136 -s 700
    3⤵
    - Program crash
    PID:1848

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\nst92.tmp

Filesize
1B

MD5
8ce4b16b22b58894aa86c421e8759df3

SHA1
13fbd79c3d390e5d6585a21e11ff5ec1970cff0c

SHA256
8254c329a92850f6d539dd376f4816ee2764517da5e0235514af433164480d7a

SHA512
2af8a9104b3f64ed640d8c7e298d2d480f03a3610cbc2b33474321ec59024a48592ea8545e41e09d5d1108759df48ede0054f225df39d4f0f312450e0aa9dd25

Download Submit
C:\Users\Admin\AppData\Local\Temp\nst92.tmp

Filesize
2B

MD5
25bc6654798eb508fa0b6343212a74fe

SHA1
15d5e1d3b948fd5986aaff7d9419b5e52c75fc93

SHA256
8e5202705183bd3a20a29e224499b0f77a8273ee33cd93cca71043c57ad4bdfc

SHA512
5868c6241ed3cfcc5c34bfe42e4b9f5c69e74975e524771d8c9f35cafc13fd01cd943ec4d8caefee79a1f4a457e69d20b7a86f88db83a5bc3e6bd8a619972898

Download Submit
C:\Users\Admin\AppData\Local\Temp\nst92.tmp

Filesize
60B

MD5
33714fd37d9159cf4911fe47896b9e69

SHA1
77c9ddfb1cd8e4a9a0a9131d0d21ebac0ef57611

SHA256
8eda392d2cd028b1a3385ff7673cade57e402248db7fe7eb192e8d6b0d8f78a2

SHA512
e4abaa9b5e706647dfe0174daa5164d0464f7ee971c5ee2983e28a4d2062eda2d0d9468340ebdbe6110b33958a9b3256757c3e5557b3ef617fe76ce576b8ba0a

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsy239.tmp

Filesize
30B

MD5
f15bfdebb2df02d02c8491bde1b4e9bd

SHA1
93bd46f57c3316c27cad2605ddf81d6c0bde9301

SHA256
c87f2ff45bb530577fb8856df1760edaf1060ae4ee2934b17fdd21b7d116f043

SHA512
1757ed4ae4d47d0c839511c18be5d75796224d4a3049e2d8853650ace2c5057c42040de6450bf90dd4969862e9ebb420cd8a34f8dd9c970779ed2e5459e8f2f1

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsyB2.tmp

Filesize
3B

MD5
4e27f2226785e9abbe046fc592668860

SHA1
28b18a7f383131df509f7191f946a32c5a2e410c

SHA256
01a219245e1501fee01ce0baea8f6065ce5162cea12fa570689a07c9717be81d

SHA512
2a23585835bdb5db8175cab265566042282841efdcee8aaba8b9b5d466b0f165c0c5973033ce94bb9a8f07a956689247981ea07ac5a51408263e1653d9710adb

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsyB2.tmp

Filesize
4B

MD5
cde63b34c142af0a38cbe83791c964f8

SHA1
ece2b194b486118b40ad12c1f0e9425dd0672424

SHA256
65e2d70166c9a802b7ad2a87129b8945f083e5f268878790a9d1f1c03f47938d

SHA512
0559d3d34ad64ccc27e685431c24fc6ead0f645db14fa0e125a64fb67dbd158c15432c1fc5407811aac8a3486090dfbcfcbc3c6bf5aa0ec73f979ef62d14853c

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsyB2.tmp

Filesize
5B

MD5
e2fecc970546c3418917879fe354826c

SHA1
63f1c1dd01b87704a6b6c99fd9f141e0a3064f16

SHA256
ff91566d755f5d038ae698a2cc0a7d4d14e5273afafc37b6f03afda163768fa0

SHA512
3c4a68cbaee94f986515f43305a0e7620c14c30213d4a17db4a3e8a1b996764eb688bf733f472fc52073c2c80bb5229bb29411d7601aefe1c4370e230c341a0a

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsyB2.tmp

Filesize
6B

MD5
50484c19f1afdaf3841a0d821ed393d2

SHA1
c65a0fb7e74ffd2c9fc3a0f9aacb0f6a24b0a68b

SHA256
6923dd1bc0460082c5d55a831908c24a282860b7f1cd6c2b79cf1bc8857c639c

SHA512
d51a20d67571fe70bcd6c36e1382a3c342f42671c710090b75fcfc2405ce24488e03a7131eefe4751d0bd3aeaad816605ad10c8e3258d72fcf379e32416cbf3b

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsyB2.tmp

Filesize
7B

MD5
67cfa7364c4cf265b047d87ff2e673ae

SHA1
56e27889277981a9b63fcf5b218744a125bbc2fa

SHA256
639b68bd180b47d542dd001d03557ee2d5b3065c3c783143bc9fb548f3fd7713

SHA512
17f28a136b20b89e9c3a418b08fd8e6fcaac960872dc33b2481af2d872efc44228f420759c57724f5d953c7ba98f2283e2acc7dfe5a58cbf719c6480ec7a648b

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsyB2.tmp

Filesize
8B

MD5
c3cb69218b85c3260387fb582cb518dd

SHA1
961c892ded09a4cbb5392097bb845ccba65902ad

SHA256
1c329924865741e0222d3ead23072cfbed14f96e2b0432573068eb0640513101

SHA512
2402fffeb89c531db742bf6f5466eee8fe13edf97b8ecfc2cace3522806b322924d1ca81dda25e59b4047b8f40ad11ae9216e0a0d5c7fc6beef4368eb9551422

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsyB2.tmp

Filesize
9B

MD5
2b3884fe02299c565e1c37ee7ef99293

SHA1
d8e2ef2a52083f6df210109fea53860ea227af9c

SHA256
ae789a65914ed002efb82dad89e5a4d4b9ec8e7faae30d0ed6e3c0d20f7d3858

SHA512
aeb9374a52d0ad99336bfd4ec7bb7c5437b827845b8784d9c21f7d96a931693604689f6adc3ca25fad132a0ad6123013211ff550f427fa86e4f26c122ac6a0fe

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsyB2.tmp

Filesize
10B

MD5
9a53fc1d7126c5e7c81bb5c15b15537b

SHA1
e2d13e0fa37de4c98f30c728210d6afafbb2b000

SHA256
a7de06c22e4e67908840ec3f00ab8fe9e04ae94fb16a74136002afbaf607ff92

SHA512
b0bffbb8072dbdcfc68f0e632f727c08fe3ef936b2ef332c08486553ff2cef7b0bcdb400e421a117e977bb0fac17ce4706a8097e32d558a918433646b6d5f1a1

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsyFF28.tmp

Filesize
74B

MD5
16d513397f3c1f8334e8f3e4fc49828f

SHA1
4ee15afca81ca6a13af4e38240099b730d6931f0

SHA256
d3c781a1855c8a70f5aca88d9e2c92afffa80541334731f62caa9494aa8a0c36

SHA512
4a350b790fdd2fe957e9ab48d5969b217ab19fc7f93f3774f1121a5f140ff9a9eaaa8fa30e06a9ef40ad776e698c2e65a05323c3adf84271da1716e75f5183c3

Download Submit
\Users\Admin\AppData\Local\Temp\nstFFA6.tmp\System.dll

Filesize
11KB

MD5
ca332bb753b0775d5e806e236ddcec55

SHA1
f35ef76592f20850baef2ebbd3c9a2cfb5ad8d8f

SHA256
df5ae79fa558dc7af244ec6e53939563b966e7dbd8867e114e928678dbd56e5d

SHA512
2de0956a1ad58ad7086e427e89b819089f2a7f1e4133ed2a0a736adc0614e8588ebe2d97f1b59ab8886d662aeb40e0b4838c6a65fbfc652253e3a45664a03a00

Download Submit
memory/2136-582-0x0000000076D40000-0x0000000076EE9000-memory.dmp

Filesize
1.7MB

Download
memory/2136-588-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2136-587-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2136-583-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2652-579-0x0000000076D40000-0x0000000076EE9000-memory.dmp

Filesize
1.7MB

Download
memory/2652-581-0x0000000004180000-0x0000000005009000-memory.dmp

Filesize
14.5MB

Download
memory/2652-580-0x0000000004180000-0x0000000005009000-memory.dmp

Filesize
14.5MB

Download
memory/2652-578-0x0000000076D41000-0x0000000076E42000-memory.dmp

Filesize
1.0MB

Download
memory/2652-577-0x0000000004180000-0x0000000005009000-memory.dmp

Filesize
14.5MB

Download