stealc | 99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf

Analysis

max time kernel
133s
max time network
301s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
24/05/2024, 00:54

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General

Target

99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
Size

2.4MB
MD5

591deb3212cb1720fa03640f6257b5dc
SHA1

5ffd579886eae9148141746294e2ee3ae922c8cc
SHA256

99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf
SHA512

670374e657a9ba7b81d220e4105316707984ce7f5bfac04f97c473d8f8ef65c137f77fbdc9c889490e89d8823bc1c2add4adda4241f34ca64f27af5336e4e573
SSDEEP

49152:P9Ay1zb37wq+3GQQvFOsAMSgcCNvQE5qh4OLzooa2ZgEPmBTI7pJLOjq5:ay1/7wq+36FBLNvQvm9n2Zm1wp9Om

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 11 IoCs

stealer

resource	yara_rule
behavioral2/memory/4112-87-0x00000000009D0000-0x00000000015D4000-memory.dmp	family_vidar_v7
behavioral2/memory/4112-97-0x00000000009D0000-0x00000000015D4000-memory.dmp	family_vidar_v7
behavioral2/memory/4112-110-0x00000000009D0000-0x00000000015D4000-memory.dmp	family_vidar_v7
behavioral2/memory/4112-165-0x00000000009D0000-0x00000000015D4000-memory.dmp	family_vidar_v7
behavioral2/memory/4112-224-0x00000000009D0000-0x00000000015D4000-memory.dmp	family_vidar_v7
behavioral2/memory/4112-283-0x00000000009D0000-0x00000000015D4000-memory.dmp	family_vidar_v7
behavioral2/memory/4112-312-0x00000000009D0000-0x00000000015D4000-memory.dmp	family_vidar_v7
behavioral2/memory/4112-366-0x00000000009D0000-0x00000000015D4000-memory.dmp	family_vidar_v7
behavioral2/memory/4112-442-0x00000000009D0000-0x00000000015D4000-memory.dmp	family_vidar_v7
behavioral2/memory/4112-544-0x00000000009D0000-0x00000000015D4000-memory.dmp	family_vidar_v7
behavioral2/memory/4112-549-0x00000000009D0000-0x00000000015D4000-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
Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe

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 local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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 NtSetInformationThreadHideFromDebugger 10 IoCs

pid	Process
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4640	timeout.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4112 wrote to memory of 1192	4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe	75
PID 4112 wrote to memory of 1192	4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe	75
PID 4112 wrote to memory of 1192	4112	99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe	75
PID 1192 wrote to memory of 4640	1192	cmd.exe	77
PID 1192 wrote to memory of 4640	1192	cmd.exe	77
PID 1192 wrote to memory of 4640	1192	cmd.exe	77

C:\Users\Admin\AppData\Local\Temp\99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe
"C:\Users\Admin\AppData\Local\Temp\99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4112
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\99ed77594a138de377aa2f032a51ef44e8db6584dca85e0acde90d91c6f230bf.exe" & rd /s /q "C:\ProgramData\BFBGCFCFHCFH" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1192
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 10
    3⤵
    - Delays execution with timeout.exe
    PID:4640

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

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Downloads

C:\ProgramData\BFBGCFCFHCFH\AAKJEG

Filesize
2.0MB

MD5
a3196b72e39cc4c9bb6286195ec07fd0

SHA1
a315739c102020d8832c41c17efd7124eb10c406

SHA256
3ad8aeb01d4efdcacbe13b104ec92c325427d54d64a3a859b6d29e3ace2fac0f

SHA512
3003d72886cb6d6c3af8af6d18078151e2e78e1bed43ba82ce1c268a722f39723de095a9a629ba63d0f9bd9cc98d6cc71042cfc949b2cd2ebbc1a81e005f1211

Download Submit
C:\ProgramData\BFBGCFCFHCFH\CGHCFB

Filesize
8KB

MD5
0b32ba08e2eb0e377b35ce5bfb105182

SHA1
cebdfe6aaf774946707a4b921f1d4359b6092cf9

SHA256
88a8a97ce133e8dab44b0980a20e7376ceaf7015734302824f34d5fbd569c581

SHA512
9fdc156eb815628ae4354f1f4b8d4f24989ed56e5e3166c2da1265131718fd80698b47f90c74ca62c706e9d2906e0d1540ceb55a8aa7f60c54c7eb1a4236242b

Download Submit
C:\ProgramData\BFBGCFCFHCFH\GCFCFC

Filesize
46KB

MD5
02d2c46697e3714e49f46b680b9a6b83

SHA1
84f98b56d49f01e9b6b76a4e21accf64fd319140

SHA256
522cad95d3fa6ebb3274709b8d09bbb1ca37389d0a924cd29e934a75aa04c6c9

SHA512
60348a145bfc71b1e07cb35fa79ab5ff472a3d0a557741ea2d39b3772bc395b86e261bd616f65307ae0d997294e49b5548d32f11e86ef3e2704959ca63da8aac

Download Submit
C:\ProgramData\BFBGCFCFHCFH\KFIEHI

Filesize
593B

MD5
91f5bc87fd478a007ec68c4e8adf11ac

SHA1
d07dd49e4ef3b36dad7d038b7e999ae850c5bef6

SHA256
92f1246c21dd5fd7266ebfd65798c61e403d01a816cc3cf780db5c8aa2e3d9c9

SHA512
fdc2a29b04e67ddbbd8fb6e8d2443e46badcb2b2fb3a850bbd6198cdccc32ee0bd8a9769d929feefe84d1015145e6664ab5fea114df5a864cf963bf98a65ffd9

Download Submit
C:\ProgramData\BFBGCFCFHCFH\VCRUNT~1.DLL

Filesize
78KB

MD5
a37ee36b536409056a86f50e67777dd7

SHA1
1cafa159292aa736fc595fc04e16325b27cd6750

SHA256
8934aaeb65b6e6d253dfe72dea5d65856bd871e989d5d3a2a35edfe867bb4825

SHA512
3a7c260646315cf8c01f44b2ec60974017496bd0d80dd055c7e43b707cadba2d63aab5e0efd435670aa77886ed86368390d42c4017fc433c3c4b9d1c47d0f356

Download Submit
C:\ProgramData\BFBGCFCFHCFH\msvcp140.dll

Filesize
439KB

MD5
5ff1fca37c466d6723ec67be93b51442

SHA1
34cc4e158092083b13d67d6d2bc9e57b798a303b

SHA256
5136a49a682ac8d7f1ce71b211de8688fce42ed57210af087a8e2dbc8a934062

SHA512
4802ef62630c521d83a1d333969593fb00c9b38f82b4d07f70fbd21f495fea9b3f67676064573d2c71c42bc6f701992989742213501b16087bb6110e337c7546

Download Submit
C:\ProgramData\BFBGCFCFHCFH\softokn3.dll

Filesize
251KB

MD5
4e52d739c324db8225bd9ab2695f262f

SHA1
71c3da43dc5a0d2a1941e874a6d015a071783889

SHA256
74ebbac956e519e16923abdc5ab8912098a4f64e38ddcb2eae23969f306afe5a

SHA512
2d4168a69082a9192b9248f7331bd806c260478ff817567df54f997d7c3c7d640776131355401e4bdb9744e246c36d658cb24b18de67d8f23f10066e5fe445f6

Download Submit
\ProgramData\BFBGCFCFHCFH\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
\ProgramData\BFBGCFCFHCFH\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
memory/4112-224-0x00000000009D0000-0x00000000015D4000-memory.dmp

Filesize
12.0MB

Download
memory/4112-110-0x00000000009D0000-0x00000000015D4000-memory.dmp

Filesize
12.0MB

Download
memory/4112-283-0x00000000009D0000-0x00000000015D4000-memory.dmp

Filesize
12.0MB

Download
memory/4112-165-0x00000000009D0000-0x00000000015D4000-memory.dmp

Filesize
12.0MB

Download
memory/4112-312-0x00000000009D0000-0x00000000015D4000-memory.dmp

Filesize
12.0MB

Download
memory/4112-366-0x00000000009D0000-0x00000000015D4000-memory.dmp

Filesize
12.0MB

Download
memory/4112-442-0x00000000009D0000-0x00000000015D4000-memory.dmp

Filesize
12.0MB

Download
memory/4112-0-0x00000000009D0000-0x00000000015D4000-memory.dmp

Filesize
12.0MB

Download
memory/4112-97-0x00000000009D0000-0x00000000015D4000-memory.dmp

Filesize
12.0MB

Download
memory/4112-544-0x00000000009D0000-0x00000000015D4000-memory.dmp

Filesize
12.0MB

Download
memory/4112-549-0x00000000009D0000-0x00000000015D4000-memory.dmp

Filesize
12.0MB

Download
memory/4112-87-0x00000000009D0000-0x00000000015D4000-memory.dmp

Filesize
12.0MB

Download
memory/4112-15-0x0000000052420000-0x000000005267F000-memory.dmp

Filesize
2.4MB

Download
memory/4112-1-0x000000007F770000-0x000000007FB41000-memory.dmp

Filesize
3.8MB

Download