stealc | 095a44fa390ddda2e06a6a6cb0dbc5972aed3867424ecc523978923703b9a720

Analysis

max time kernel
145s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240220-en
resource tags

arch:x64arch:x86image:win10v2004-20240220-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 23:01

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General

Target
98aa50851ae80d3839136955f4e406a2.exe
Size 294KB
Sample240220-2zjc2agf47
SHA256 095a44fa390ddda2e06a6a6cb0dbc5972aed3867424ecc523978923703b9a720
MD5 98aa50851ae80d3839136955f4e406a2
SHA1 e2f9440e882c14d3a2867d33cd7b35415393eb24
SHA512 84690131dd2b76ae00512777e4e60536ce6c4954842605c4235d4d398c6c5331f660bd1b1c6182eb91f2c755ce15cfdde39c7a2a56f781cde8b641efe6078358
SSDEEP 6144:od/8okM4hJ7mjidh67Fp/3rYqcTseFLQYQ8/SZqW8YB:o58okM2JHGFpjYqcRLDEB
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

http://185.172.128.145

Attributes

url_path
/3cd2b41cbde8fc9c.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
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-1-5-21-4023562663-3911442808-1494947993-1000\Control Panel\International\Geo\Nation	98aa50851ae80d3839136955f4e406a2.exe

Executes dropped EXE 2 IoCs

pid	Process
3688	ud0.0.exe
5108	ud0.1.exe

Loads dropped DLL 2 IoCs

pid	Process
3688	ud0.0.exe
3688	ud0.0.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 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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
960	468	WerFault.exe	84
3796	3688	WerFault.exe	89

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ud0.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ud0.0.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
3316	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3688	ud0.0.exe
3688	ud0.0.exe
3688	ud0.0.exe
3688	ud0.0.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5108	ud0.1.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 468 wrote to memory of 3688	468	98aa50851ae80d3839136955f4e406a2.exe	89
PID 468 wrote to memory of 3688	468	98aa50851ae80d3839136955f4e406a2.exe	89
PID 468 wrote to memory of 3688	468	98aa50851ae80d3839136955f4e406a2.exe	89
PID 468 wrote to memory of 5108	468	98aa50851ae80d3839136955f4e406a2.exe	92
PID 468 wrote to memory of 5108	468	98aa50851ae80d3839136955f4e406a2.exe	92
PID 468 wrote to memory of 5108	468	98aa50851ae80d3839136955f4e406a2.exe	92
PID 5108 wrote to memory of 2020	5108	ud0.1.exe	95
PID 5108 wrote to memory of 2020	5108	ud0.1.exe	95
PID 5108 wrote to memory of 2020	5108	ud0.1.exe	95
PID 2020 wrote to memory of 2348	2020	cmd.exe	97
PID 2020 wrote to memory of 2348	2020	cmd.exe	97
PID 2020 wrote to memory of 2348	2020	cmd.exe	97
PID 2020 wrote to memory of 3316	2020	cmd.exe	98
PID 2020 wrote to memory of 3316	2020	cmd.exe	98
PID 2020 wrote to memory of 3316	2020	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\98aa50851ae80d3839136955f4e406a2.exe
"C:\Users\Admin\AppData\Local\Temp\98aa50851ae80d3839136955f4e406a2.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:468
- C:\Users\Admin\AppData\Local\Temp\ud0.0.exe
  "C:\Users\Admin\AppData\Local\Temp\ud0.0.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3688
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3688 -s 2312
    3⤵
    - Program crash
    PID:3796
- C:\Users\Admin\AppData\Local\Temp\ud0.1.exe
  "C:\Users\Admin\AppData\Local\Temp\ud0.1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5108
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2020
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:2348
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F
      4⤵
      Creates scheduled task(s)
      PID:3316
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 468 -s 1148
  2⤵
  - Program crash
  PID:960

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 468 -ip 468
1⤵
PID:4060

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 3688 -ip 3688
1⤵
PID:2548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

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

Are.docx

Path C:\ProgramData\Are.docx
Size 11KB
SHA256 5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454
MD5 a33e5b189842c5867f46566bdbf7a095
SHA1 e1c06359f6a76da90d19e8fd95e79c832edb3196
SHA512 f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b
SSDEEP 192:CtNCEE33S7Ok0CMSYbcBVk6tqM16iPBkeawLWdxd7o3Lp:aNwC78uYbcBv6akwLWdxdE3Lp
MD5 SHA1 SHA512 SSDEEP

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mozglue.dll

Path C:\ProgramData\mozglue.dll
Size 593KB
SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
MD5 c8fd9be83bc728cc04beffafc2907fe9
SHA1 95ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA512 fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
SSDEEP 12288:BlSyAom/gcRKMdRm4wFkRHuyG4RRGJVDjMk/x21R8gY/r:BKgcRKMdRm4wFkVVDGJVv//x21R8br
MD5 SHA1 SHA512 SSDEEP

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nss3.dll

Path C:\ProgramData\nss3.dll
Size 2.0MB
SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
MD5 1cc453cdf74f31e4d913ff9c10acdde2
SHA1 6e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA512 dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
SSDEEP 49152:fECf12gikHlnKGxJRIB+y5nvxnaOSJ3HFNWYrVvE4CQsgzMmQfTU1NrWmy4KoAzh:J7Tf8J1Q+SS5/nr
MD5 SHA1 SHA512 SSDEEP

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ud0.0.exe

Path C:\Users\Admin\AppData\Local\Temp\ud0.0.exe
Size 181KB
SHA256 4cbc69704efc2c428fd13988476430c8ec7e105e56b10c07bff1afa5d8d99c69
MD5 22b5a513db4af9a232bf0529704e2449
SHA1 f59317dec43682e7ccf5db0d6d8a6465b27ee964
SHA512 5c91d72da0ed761789b08a7d0868bac0298ee991e4e0d72efed77d2ef3c43ff92e6a0c7ec77e0e977ce4aef1632fac018cc5ebd1707a1784af15eb123e8765f7
SSDEEP 3072:l+1s6SOYKwGwJbgrWFSQf4Yoeelc4C7lB9YUrzG19T:QTTYdVAW1f4YQ7C7lBZ6
MD5 SHA1 SHA512 SSDEEP

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ud0.1.exe

Path C:\Users\Admin\AppData\Local\Temp\ud0.1.exe
Size 4.7MB
SHA256 50a46b3120da828502ef0caba15defbad004a3adb88e6eacf1f9604572e2d503
MD5 5e94f0f6265f9e8b2f706f1d46bbd39e
SHA1 d0189cba430f5eea07efe1ab4f89adf5ae2453db
SHA512 473dfa66a36feed9b29a43245074141478327ce22ba7cce512599379dcb783b4d665e2d65c5e9750b988c7ed8f6c3349a7a12d4b8b57c89840eee6ca6e1a30cd
SSDEEP 49152:90oSiZ63YBmS9+rCgpvH8la0ZxRh+caGnj8HEQUhexTUT+1d/2/Tbt:0Ula0cGwXUheabt
MD5 SHA1 SHA512 SSDEEP

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Task.bat

Path C:\Users\Admin\AppData\Roaming\Temp\Task.bat
Size 128B
SHA256 6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331
MD5 11bb3db51f701d4e42d3287f71a6a43e
SHA1 63a4ee82223be6a62d04bdfe40ef8ba91ae49a86
SHA512 907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2
MD5 SHA1 SHA512

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memory/468-2-0x00000000025A0000-0x0000000002607000-memory.dmp

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memory/468-3-0x0000000000400000-0x000000000083F000-memory.dmp

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memory/468-1-0x00000000009C0000-0x0000000000AC0000-memory.dmp

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memory/468-30-0x0000000000400000-0x000000000083F000-memory.dmp

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memory/3688-16-0x0000000000A90000-0x0000000000B90000-memory.dmp

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memory/3688-31-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/3688-17-0x00000000009B0000-0x00000000009E4000-memory.dmp

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memory/3688-105-0x0000000000400000-0x0000000000823000-memory.dmp

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memory/3688-18-0x0000000000400000-0x0000000000823000-memory.dmp

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memory/3688-116-0x0000000000400000-0x0000000000823000-memory.dmp

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memory/5108-29-0x00000000027F0000-0x00000000027F1000-memory.dmp

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memory/5108-106-0x0000000000400000-0x00000000008E2000-memory.dmp

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memory/5108-118-0x00000000027F0000-0x00000000027F1000-memory.dmp

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