guloader | 5acd33e1e58647897cd7897305eec80d6c9228ec2fce8f972825b48ea16a8c74

Analysis

max time kernel
146s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
26-10-2024 11:19

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General

Target

c56D7_Receipt.vbs
Size

130KB
MD5

878ba89eaad87f86c7ff4e5fee1e1823
SHA1

8f9496d5da92c9a0f64ffe5aa0ee0da259a9da1b
SHA256

30c4d81a0075e27984f768fa73c43240f5b14724a84a5057c15c99114b4aac15
SHA512

2ed93d10566fcd7bc312a321a4551611c08dc1de817cf89c5a46be1d8243b77a075896658dd92d5de9d66d7a5bed92b51d25e0729f06369ba673a12b1a37bc7b
SSDEEP

3072:ZxQCCYVaCCq+c0C49NixM8B20HcO4uuxQCCYVaCCq+c0C49NixM8B20HcO4uA:Z2CCYsfq+cp49oa8B208Mu2CCYsfq+cm

Score

10^/10

guloader xworm discovery downloader persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

xwor3july.duckdns.org:9402

Mutex

JIs7HXfvmVwG8wtR

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3820-600-0x0000000000800000-0x000000000080E000-memory.dmp	family_xworm

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Blocklisted process makes network request 1 IoCs

flow	pid	Process
4	2904	WScript.exe

Downloads MZ/PE file

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
3404	filaucioso.bat

Loads dropped DLL 3 IoCs

pid	Process
3404	filaucioso.bat
3404	filaucioso.bat
3820	filaucioso.bat

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Afmystificeringen = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Unsurveyable197\\Busaos.pif"	filaucioso.bat

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\traveskoen.ini	filaucioso.bat

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3820	filaucioso.bat

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3404	filaucioso.bat
3820	filaucioso.bat

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3404 set thread context of 3820	3404	filaucioso.bat	100

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	filaucioso.bat
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	filaucioso.bat

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral2/files/0x000d000000023b30-3.dat	nsis_installer_1
behavioral2/files/0x000d000000023b30-3.dat	nsis_installer_2

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	4	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3820	filaucioso.bat

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3404	filaucioso.bat

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3820	filaucioso.bat

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3820	filaucioso.bat

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2904 wrote to memory of 3404	2904	WScript.exe	96
PID 2904 wrote to memory of 3404	2904	WScript.exe	96
PID 2904 wrote to memory of 3404	2904	WScript.exe	96
PID 3404 wrote to memory of 3820	3404	filaucioso.bat	100
PID 3404 wrote to memory of 3820	3404	filaucioso.bat	100
PID 3404 wrote to memory of 3820	3404	filaucioso.bat	100
PID 3404 wrote to memory of 3820	3404	filaucioso.bat	100
PID 3404 wrote to memory of 3820	3404	filaucioso.bat	100

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\c56D7_Receipt.vbs"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2904
- C:\ProgramData\filaucioso.bat
  "C:\ProgramData\filaucioso.bat"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3404
- - C:\ProgramData\filaucioso.bat
    "C:\ProgramData\filaucioso.bat"
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:3820

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

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

C:\ProgramData\filaucioso.bat

Filesize
5.1MB

MD5
f3a3332b13baa50c41644b86efdf0fe4

SHA1
f3b91aa55b8dce62cb614e2a43d8e3973b1d47b6

SHA256
7fd5435121f2cb4320b1bc49400152ec3fecce7f5ce0acce56f32c327126c970

SHA512
46808e4d79d0d1fbe2835456daf31e0de9e8f296b7863f38400eaa03fbf33be450f92df16f9b77ac5bb95aa33a97d484c1c678891c6e13b151f9cb7865c99be7

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaBB15.tmp

Filesize
3B

MD5
4e27f2226785e9abbe046fc592668860

SHA1
28b18a7f383131df509f7191f946a32c5a2e410c

SHA256
01a219245e1501fee01ce0baea8f6065ce5162cea12fa570689a07c9717be81d

SHA512
2a23585835bdb5db8175cab265566042282841efdcee8aaba8b9b5d466b0f165c0c5973033ce94bb9a8f07a956689247981ea07ac5a51408263e1653d9710adb

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaBB15.tmp

Filesize
5B

MD5
e2fecc970546c3418917879fe354826c

SHA1
63f1c1dd01b87704a6b6c99fd9f141e0a3064f16

SHA256
ff91566d755f5d038ae698a2cc0a7d4d14e5273afafc37b6f03afda163768fa0

SHA512
3c4a68cbaee94f986515f43305a0e7620c14c30213d4a17db4a3e8a1b996764eb688bf733f472fc52073c2c80bb5229bb29411d7601aefe1c4370e230c341a0a

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaBB15.tmp

Filesize
10B

MD5
9a53fc1d7126c5e7c81bb5c15b15537b

SHA1
e2d13e0fa37de4c98f30c728210d6afafbb2b000

SHA256
a7de06c22e4e67908840ec3f00ab8fe9e04ae94fb16a74136002afbaf607ff92

SHA512
b0bffbb8072dbdcfc68f0e632f727c08fe3ef936b2ef332c08486553ff2cef7b0bcdb400e421a117e977bb0fac17ce4706a8097e32d558a918433646b6d5f1a1

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsgBC20.tmp

Filesize
1B

MD5
8ce4b16b22b58894aa86c421e8759df3

SHA1
13fbd79c3d390e5d6585a21e11ff5ec1970cff0c

SHA256
8254c329a92850f6d539dd376f4816ee2764517da5e0235514af433164480d7a

SHA512
2af8a9104b3f64ed640d8c7e298d2d480f03a3610cbc2b33474321ec59024a48592ea8545e41e09d5d1108759df48ede0054f225df39d4f0f312450e0aa9dd25

Download Submit
C:\Users\Admin\AppData\Local\Temp\nskB9CB.tmp

Filesize
70B

MD5
f603843c4b1146c576a2c9e0826de265

SHA1
5de71ba33c20cfb74c19c706a4a44706d78fb102

SHA256
ada9d1ffc0e78d2e2c05290b4ba1b1b04bc9c97a8f8e084ae0d49e36a9bb9c0c

SHA512
7a5a8ebc1c12193783ae711eb4716c1a2e52d1c4799dcd7f2a29924c246b1c665f456de3eaffd5e9cd7f42e788009e2798d1121c8d695698c86349bff17d5e8a

Download Submit
C:\Users\Admin\AppData\Local\Temp\nskB9CB.tmp

Filesize
74B

MD5
16d513397f3c1f8334e8f3e4fc49828f

SHA1
4ee15afca81ca6a13af4e38240099b730d6931f0

SHA256
d3c781a1855c8a70f5aca88d9e2c92afffa80541334731f62caa9494aa8a0c36

SHA512
4a350b790fdd2fe957e9ab48d5969b217ab19fc7f93f3774f1121a5f140ff9a9eaaa8fa30e06a9ef40ad776e698c2e65a05323c3adf84271da1716e75f5183c3

Download Submit
C:\Users\Admin\AppData\Local\Temp\nskB9CB.tmp

Filesize
15B

MD5
cf7be2840455491f249648c44a1dc759

SHA1
9863c7f04f9d674365fe23f257ba43447f985e8e

SHA256
769c7c2ec9413a771a2f497862194dfb0200452f3a20f5e1f77ad0b6ae535697

SHA512
83984674c9e337bda5ac88c3b2d0e426fd9051e1585b95ea99b3c569ace50900f811e664da9cf426f080837e2b48a5709003b7e5d25382a1ad90026b40777abd

Download Submit
C:\Users\Admin\AppData\Local\Temp\nskB9CB.tmp

Filesize
27B

MD5
b93641813851b1ad166b8163e5aeddc9

SHA1
642d989ceea62bcfd70fb74f3c62ade0c1c41d78

SHA256
1628c6bee5afc85044309f45e34190bc9ce8bd9516e30792460e14362657d42d

SHA512
eee31a0d51df3a7ba35ab4025f8d458c4d12b6f46412982ad34aef31d9e83c7070056a07777ed4b62fb3b92b376b618099374901ffe4f988fe0f853a0e57c8ec

Download Submit
C:\Users\Admin\AppData\Local\Temp\nskB9CB.tmp

Filesize
28B

MD5
2490402a1d7d19949dd2a237b95af06f

SHA1
9a960e98c750e3fc7e44cdd6e1af20e690d893b1

SHA256
bb92b5197bb4677950b78f816a8170797d0392af55e31d0f0744fe9c99f7e9b8

SHA512
f3d299910eee8e8ace51ae3e7d79d12f7f68bfbcdaa0d7b8b66d505c4bdba7d95a97aeefc9f22868989115a99f81e0e3e9480e0d3e9af5fa27d2d9b0e961b52e

Download Submit
C:\Users\Admin\AppData\Local\Temp\nskB9CB.tmp

Filesize
36B

MD5
056fd9e747f45f72c12ed185db65ca8f

SHA1
96b9e5254b0c249a3393008a3fb160b18319532b

SHA256
b46a1b647cd0ac5d5ed27381e1559a8ed6244c5bb7a0d27a41ab1784c40bef85

SHA512
93f9577f9226d4c090034d81735a61a4505da2068e207d5885452637bfcf87f434278e58db281bce79d49e0d941bf3ead9550541b459fad386a7dd60e24c4446

Download Submit
C:\Users\Admin\AppData\Local\Temp\nslBB05.tmp\System.dll

Filesize
11KB

MD5
0063d48afe5a0cdc02833145667b6641

SHA1
e7eb614805d183ecb1127c62decb1a6be1b4f7a8

SHA256
ac9dfe3b35ea4b8932536ed7406c29a432976b685cc5322f94ef93df920fede7

SHA512
71cbbcaeb345e09306e368717ea0503fe8df485be2e95200febc61bcd8ba74fb4211cd263c232f148c0123f6c6f2e3fd4ea20bdecc4070f5208c35c6920240f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\nswBD1B.tmp

Filesize
2B

MD5
25bc6654798eb508fa0b6343212a74fe

SHA1
15d5e1d3b948fd5986aaff7d9419b5e52c75fc93

SHA256
8e5202705183bd3a20a29e224499b0f77a8273ee33cd93cca71043c57ad4bdfc

SHA512
5868c6241ed3cfcc5c34bfe42e4b9f5c69e74975e524771d8c9f35cafc13fd01cd943ec4d8caefee79a1f4a457e69d20b7a86f88db83a5bc3e6bd8a619972898

Download Submit
C:\Users\Admin\AppData\Local\Temp\nswBD1B.tmp

Filesize
6B

MD5
50484c19f1afdaf3841a0d821ed393d2

SHA1
c65a0fb7e74ffd2c9fc3a0f9aacb0f6a24b0a68b

SHA256
6923dd1bc0460082c5d55a831908c24a282860b7f1cd6c2b79cf1bc8857c639c

SHA512
d51a20d67571fe70bcd6c36e1382a3c342f42671c710090b75fcfc2405ce24488e03a7131eefe4751d0bd3aeaad816605ad10c8e3258d72fcf379e32416cbf3b

Download Submit
C:\Users\Admin\AppData\Local\Temp\nswBD1B.tmp

Filesize
7B

MD5
67cfa7364c4cf265b047d87ff2e673ae

SHA1
56e27889277981a9b63fcf5b218744a125bbc2fa

SHA256
639b68bd180b47d542dd001d03557ee2d5b3065c3c783143bc9fb548f3fd7713

SHA512
17f28a136b20b89e9c3a418b08fd8e6fcaac960872dc33b2481af2d872efc44228f420759c57724f5d953c7ba98f2283e2acc7dfe5a58cbf719c6480ec7a648b

Download Submit
C:\Users\Admin\AppData\Local\Temp\nswBD1B.tmp

Filesize
8B

MD5
c3cb69218b85c3260387fb582cb518dd

SHA1
961c892ded09a4cbb5392097bb845ccba65902ad

SHA256
1c329924865741e0222d3ead23072cfbed14f96e2b0432573068eb0640513101

SHA512
2402fffeb89c531db742bf6f5466eee8fe13edf97b8ecfc2cace3522806b322924d1ca81dda25e59b4047b8f40ad11ae9216e0a0d5c7fc6beef4368eb9551422

Download Submit
C:\Users\Admin\AppData\Local\Temp\nswBD1B.tmp

Filesize
9B

MD5
2b3884fe02299c565e1c37ee7ef99293

SHA1
d8e2ef2a52083f6df210109fea53860ea227af9c

SHA256
ae789a65914ed002efb82dad89e5a4d4b9ec8e7faae30d0ed6e3c0d20f7d3858

SHA512
aeb9374a52d0ad99336bfd4ec7bb7c5437b827845b8784d9c21f7d96a931693604689f6adc3ca25fad132a0ad6123013211ff550f427fa86e4f26c122ac6a0fe

Download Submit
memory/3404-587-0x0000000004D90000-0x0000000006424000-memory.dmp

Filesize
22.6MB

Download
memory/3404-588-0x00000000770B1000-0x00000000771D1000-memory.dmp

Filesize
1.1MB

Download
memory/3404-589-0x0000000073D04000-0x0000000073D05000-memory.dmp

Filesize
4KB

Download
memory/3404-591-0x0000000004D90000-0x0000000006424000-memory.dmp

Filesize
22.6MB

Download
memory/3820-599-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/3820-600-0x0000000000800000-0x000000000080E000-memory.dmp

Filesize
56KB

Download
memory/3820-601-0x0000000035C30000-0x0000000035CCC000-memory.dmp

Filesize
624KB

Download
memory/3820-603-0x00000000361A0000-0x0000000036744000-memory.dmp

Filesize
5.6MB

Download
memory/3820-604-0x0000000035DD0000-0x0000000035E62000-memory.dmp

Filesize
584KB

Download
memory/3820-605-0x0000000035E70000-0x0000000035E7A000-memory.dmp

Filesize
40KB

Download
memory/3820-607-0x0000000036850000-0x00000000368B6000-memory.dmp

Filesize
408KB

Download