stealc | a651607b9bba24d9c35bde35df0c398a0c916fae71b9b4c37ed13b444a4ec629

Resubmissions

25-05-2024 16:32

240525-t2a6faae9w 10

25-05-2024 15:14

240525-smrdfagf9t 10

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
25-05-2024 16:32

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General

Target

Setup.exe
Size

10.1MB
MD5

1c57a22d32a4e973c63c90f84946149e
SHA1

98954b5054e5c4bb6e509bb34bf60b282f6efeea
SHA256

a651607b9bba24d9c35bde35df0c398a0c916fae71b9b4c37ed13b444a4ec629
SHA512

670216e4f8ef062e45dd9a7df0ce604b839f7e1e6eb51aeff6d95a96b12d882c1e50a0dc8e13df89e62cd3ea82031b385d254c5c0c807702b2d6e27e99617e6d
SSDEEP

196608:6cSu3XxiLS7jUJjRas3w+8wB6+d02F185c12dtkUoQ2kFl2ZnG46zsI7f1wGoO:/SuHxqS7Sdas3wHz+uM18i12dtkUTRl5

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 4 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/3772-24-0x0000000000F10000-0x000000000165A000-memory.dmp	family_vidar_v7
behavioral2/memory/3772-54-0x0000000000F10000-0x000000000165A000-memory.dmp	family_vidar_v7
behavioral2/memory/3772-101-0x0000000000F10000-0x000000000165A000-memory.dmp	family_vidar_v7
behavioral2/memory/3772-118-0x0000000000F10000-0x000000000165A000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

XDD.au3cmd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	XDD.au3
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	cmd.exe

Loads dropped DLL 3 IoCs

Processes:

XDD.au3

pid process

3772 XDD.au3
3772 XDD.au3
3772 XDD.au3
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Suspicious use of SetThreadContext 1 IoCs

Processes:

Setup.exe

description pid process target process

PID 2184 set thread context of 4452 2184 Setup.exe comp.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.

Query Registry
T1012

System Information Discovery
T1082

Processes:

XDD.au3

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString XDD.au3
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

5088 timeout.exe

pid	process
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3

description	pid	process	target process
PID 2184 set thread context of 4452	2184	Setup.exe	comp.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	XDD.au3

pid	process
5088	timeout.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

Setup.execomp.exeXDD.au3

pid	process
2184	Setup.exe
2184	Setup.exe
4452	comp.exe
4452	comp.exe
4452	comp.exe
4452	comp.exe
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3
3772	XDD.au3

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

Setup.execomp.exe

pid process

2184 Setup.exe
4452 comp.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

Setup.execomp.exeXDD.au3cmd.exe

description	pid	process	target process
PID 2184 wrote to memory of 4452	2184	Setup.exe	comp.exe
PID 2184 wrote to memory of 4452	2184	Setup.exe	comp.exe
PID 2184 wrote to memory of 4452	2184	Setup.exe	comp.exe
PID 2184 wrote to memory of 4452	2184	Setup.exe	comp.exe
PID 4452 wrote to memory of 3772	4452	comp.exe	XDD.au3
PID 4452 wrote to memory of 3772	4452	comp.exe	XDD.au3
PID 4452 wrote to memory of 3772	4452	comp.exe	XDD.au3
PID 4452 wrote to memory of 3772	4452	comp.exe	XDD.au3
PID 4452 wrote to memory of 3772	4452	comp.exe	XDD.au3
PID 3772 wrote to memory of 3168	3772	XDD.au3	cmd.exe
PID 3772 wrote to memory of 3168	3772	XDD.au3	cmd.exe
PID 3772 wrote to memory of 3168	3772	XDD.au3	cmd.exe
PID 3772 wrote to memory of 4484	3772	XDD.au3	cmd.exe
PID 3772 wrote to memory of 4484	3772	XDD.au3	cmd.exe
PID 3772 wrote to memory of 4484	3772	XDD.au3	cmd.exe
PID 4484 wrote to memory of 5088	4484	cmd.exe	timeout.exe
PID 4484 wrote to memory of 5088	4484	cmd.exe	timeout.exe
PID 4484 wrote to memory of 5088	4484	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\Setup.exe
"C:\Users\Admin\AppData\Local\Temp\Setup.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2184

C:\Windows\SysWOW64\comp.exe
C:\Windows\SysWOW64\comp.exe
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4452

C:\Users\Admin\AppData\Local\Temp\XDD.au3
C:\Users\Admin\AppData\Local\Temp\XDD.au3
3⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3772

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c start "" "C:\ProgramData\JJJEBGDAFH.exe"
4⤵
- Checks computer location settings
PID:3168

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\IIJKJDAFHJDH" & exit
4⤵
- Suspicious use of WriteProcessMemory
PID:4484

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
5⤵
- Delays execution with timeout.exe
PID:5088

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3760,i,13035806169561352434,1332896185314862791,262144 --variations-seed-version --mojo-platform-channel-handle=4120 /prefetch:8
1⤵
PID:2808

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-appcompat-clear --field-trial-handle=2976,i,13035806169561352434,1332896185314862791,262144 --variations-seed-version --mojo-platform-channel-handle=2428 /prefetch:3
1⤵
PID:3120

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\IIJKJDAFHJDH\VCRUNT~1.DLL
Filesize
78KB

MD5
a37ee36b536409056a86f50e67777dd7

SHA1
1cafa159292aa736fc595fc04e16325b27cd6750

SHA256
8934aaeb65b6e6d253dfe72dea5d65856bd871e989d5d3a2a35edfe867bb4825

SHA512
3a7c260646315cf8c01f44b2ec60974017496bd0d80dd055c7e43b707cadba2d63aab5e0efd435670aa77886ed86368390d42c4017fc433c3c4b9d1c47d0f356

Download Submit
C:\ProgramData\IIJKJDAFHJDH\mozglue.dll
Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
C:\ProgramData\IIJKJDAFHJDH\msvcp140.dll
Filesize
439KB

MD5
5ff1fca37c466d6723ec67be93b51442

SHA1
34cc4e158092083b13d67d6d2bc9e57b798a303b

SHA256
5136a49a682ac8d7f1ce71b211de8688fce42ed57210af087a8e2dbc8a934062

SHA512
4802ef62630c521d83a1d333969593fb00c9b38f82b4d07f70fbd21f495fea9b3f67676064573d2c71c42bc6f701992989742213501b16087bb6110e337c7546

Download Submit
C:\ProgramData\IIJKJDAFHJDH\nss3.dll
Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
C:\ProgramData\IIJKJDAFHJDH\softokn3.dll
Filesize
251KB

MD5
4e52d739c324db8225bd9ab2695f262f

SHA1
71c3da43dc5a0d2a1941e874a6d015a071783889

SHA256
74ebbac956e519e16923abdc5ab8912098a4f64e38ddcb2eae23969f306afe5a

SHA512
2d4168a69082a9192b9248f7331bd806c260478ff817567df54f997d7c3c7d640776131355401e4bdb9744e246c36d658cb24b18de67d8f23f10066e5fe445f6

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\SCT Auditing Pending Reports
Filesize
2B

MD5
d751713988987e9331980363e24189ce

SHA1
97d170e1550eee4afc0af065b78cda302a97674c

SHA256
4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

SHA512
b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\Sdch Dictionaries
Filesize
40B

MD5
20d4b8fa017a12a108c87f540836e250

SHA1
1ac617fac131262b6d3ce1f52f5907e31d5f6f00

SHA256
6028bd681dbf11a0a58dde8a0cd884115c04caa59d080ba51bde1b086ce0079d

SHA512
507b2b8a8a168ff8f2bdafa5d9d341c44501a5f17d9f63f3d43bd586bc9e8ae33221887869fa86f845b7d067cb7d2a7009efd71dda36e03a40a74fee04b86856

Download Submit
C:\Users\Admin\AppData\Local\Temp\9dc7123c
Filesize
6.7MB

MD5
79c84428129e577f90a46e1ca8c97197

SHA1
a4bff3a39ba004a65cfdc911d1c0f56ae248c647

SHA256
f99c106c9dac2077f8fbcb1fa55b4c6be4315ece789f0c03505b94817974a2c7

SHA512
96c37c758ab7c0836fc0f23d6876c5fd65226b3ebb670699b0b5bb325c36354d14dafa6f71961081930517b62cec4a5114e2feefc22f0555ad7647d9e848fcfa

Download Submit
C:\Users\Admin\AppData\Local\Temp\XDD.au3
Filesize
872KB

MD5
c56b5f0201a3b3de53e561fe76912bfd

SHA1
2a4062e10a5de813f5688221dbeb3f3ff33eb417

SHA256
237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

SHA512
195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

Download Submit
C:\Users\Admin\AppData\Local\Temp\aa019b2d
Filesize
6.7MB

MD5
84cec97e5efa3d03304d9c4ca16f70ad

SHA1
4a77c2be7a37a0dae863a9b20e47879bd0fd189e

SHA256
453a9b7a2db8f55a41f25ed67d374a2b1aff4324026addd6d8c3e254a1ff8337

SHA512
10e80d941bd68fb6bb19a88bdbb4b253163d08eb8ba6d9ca36c5fb2464393b5d1b4cc06aaa1d04d95b6ac8f188dae044266ac8bf6cf0d09b747fc15d1310bb3c

Download Submit
memory/2184-9-0x0000000073F00000-0x000000007407B000-memory.dmp

Filesize
1.5MB

Download
memory/2184-10-0x0000000073F00000-0x000000007407B000-memory.dmp

Filesize
1.5MB

Download
memory/2184-6-0x0000000073F00000-0x000000007407B000-memory.dmp

Filesize
1.5MB

Download
memory/2184-7-0x00007FFCC6BF0000-0x00007FFCC6DE5000-memory.dmp

Filesize
2.0MB

Download
memory/2184-8-0x0000000073F12000-0x0000000073F14000-memory.dmp

Filesize
8KB

Download
memory/3772-101-0x0000000000F10000-0x000000000165A000-memory.dmp

Filesize
7.3MB

Download
memory/3772-54-0x0000000000F10000-0x000000000165A000-memory.dmp

Filesize
7.3MB

Download
memory/3772-26-0x00007FFCC6BF0000-0x00007FFCC6DE5000-memory.dmp

Filesize
2.0MB

Download
memory/3772-30-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/3772-118-0x0000000000F10000-0x000000000165A000-memory.dmp

Filesize
7.3MB

Download
memory/3772-24-0x0000000000F10000-0x000000000165A000-memory.dmp

Filesize
7.3MB

Download
memory/4452-22-0x0000000073F00000-0x000000007407B000-memory.dmp

Filesize
1.5MB

Download
memory/4452-18-0x0000000073F00000-0x000000007407B000-memory.dmp

Filesize
1.5MB

Download
memory/4452-16-0x0000000073F00000-0x000000007407B000-memory.dmp

Filesize
1.5MB

Download
memory/4452-12-0x0000000073F00000-0x000000007407B000-memory.dmp

Filesize
1.5MB

Download
memory/4452-14-0x00007FFCC6BF0000-0x00007FFCC6DE5000-memory.dmp

Filesize
2.0MB

Download