stealc | 615b666d7dbd523685e35a7bd7abb3d93f3cf82a9bc3374be0134be716a89080

Analysis

max time kernel
146s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
29/01/2024, 09:29

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General

Target

2bc8639cc65bbaec9670c58fa27963a3.exe
Size

295KB
MD5

2bc8639cc65bbaec9670c58fa27963a3
SHA1

df2bb824f891d5739bc0e4ee35987eb9d6beb6f7
SHA256

615b666d7dbd523685e35a7bd7abb3d93f3cf82a9bc3374be0134be716a89080
SHA512

10af5b8e849126b005a246570bd2a71e4c2c973172c1d0564b24b01937a8426b2b6f29a712200d04005b9954fd4a082faa0f4a3996ddf6f7951fdb83cde93a0a
SSDEEP

6144:VrLjp+1xf5atcTdV8Gviyn49UKRF9u+diYp0va:VrXpIf4tcRViynAU1+0Yma

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

http://185.172.128.79

Attributes

url_path
/3886d2276f6914c4.php

rc4.plain

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	2bc8639cc65bbaec9670c58fa27963a3.exe
Key value queried	\REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	u3q8.0.exe

Executes dropped EXE 2 IoCs

pid	Process
1856	u3q8.0.exe
4036	u3q8.1.exe

Loads dropped DLL 2 IoCs

pid	Process
1856	u3q8.0.exe
1856	u3q8.0.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3200 set thread context of 4832	3200	2bc8639cc65bbaec9670c58fa27963a3.exe	83

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
1944	1856	WerFault.exe	84

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	u3q8.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3q8.0.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
2104	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2612	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1856	u3q8.0.exe
1856	u3q8.0.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4036	u3q8.1.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 3200 wrote to memory of 4832	3200	2bc8639cc65bbaec9670c58fa27963a3.exe	83
PID 3200 wrote to memory of 4832	3200	2bc8639cc65bbaec9670c58fa27963a3.exe	83
PID 3200 wrote to memory of 4832	3200	2bc8639cc65bbaec9670c58fa27963a3.exe	83
PID 3200 wrote to memory of 4832	3200	2bc8639cc65bbaec9670c58fa27963a3.exe	83
PID 3200 wrote to memory of 4832	3200	2bc8639cc65bbaec9670c58fa27963a3.exe	83
PID 3200 wrote to memory of 4832	3200	2bc8639cc65bbaec9670c58fa27963a3.exe	83
PID 3200 wrote to memory of 4832	3200	2bc8639cc65bbaec9670c58fa27963a3.exe	83
PID 3200 wrote to memory of 4832	3200	2bc8639cc65bbaec9670c58fa27963a3.exe	83
PID 3200 wrote to memory of 4832	3200	2bc8639cc65bbaec9670c58fa27963a3.exe	83
PID 3200 wrote to memory of 4832	3200	2bc8639cc65bbaec9670c58fa27963a3.exe	83
PID 4832 wrote to memory of 1856	4832	2bc8639cc65bbaec9670c58fa27963a3.exe	84
PID 4832 wrote to memory of 1856	4832	2bc8639cc65bbaec9670c58fa27963a3.exe	84
PID 4832 wrote to memory of 1856	4832	2bc8639cc65bbaec9670c58fa27963a3.exe	84
PID 4832 wrote to memory of 4036	4832	2bc8639cc65bbaec9670c58fa27963a3.exe	86
PID 4832 wrote to memory of 4036	4832	2bc8639cc65bbaec9670c58fa27963a3.exe	86
PID 4832 wrote to memory of 4036	4832	2bc8639cc65bbaec9670c58fa27963a3.exe	86
PID 4036 wrote to memory of 4056	4036	u3q8.1.exe	91
PID 4036 wrote to memory of 4056	4036	u3q8.1.exe	91
PID 4036 wrote to memory of 4056	4036	u3q8.1.exe	91
PID 4056 wrote to memory of 4500	4056	cmd.exe	93
PID 4056 wrote to memory of 4500	4056	cmd.exe	93
PID 4056 wrote to memory of 4500	4056	cmd.exe	93
PID 4056 wrote to memory of 2104	4056	cmd.exe	94
PID 4056 wrote to memory of 2104	4056	cmd.exe	94
PID 4056 wrote to memory of 2104	4056	cmd.exe	94
PID 1856 wrote to memory of 1696	1856	u3q8.0.exe	98
PID 1856 wrote to memory of 1696	1856	u3q8.0.exe	98
PID 1856 wrote to memory of 1696	1856	u3q8.0.exe	98
PID 1696 wrote to memory of 2612	1696	cmd.exe	101
PID 1696 wrote to memory of 2612	1696	cmd.exe	101
PID 1696 wrote to memory of 2612	1696	cmd.exe	101

C:\Users\Admin\AppData\Local\Temp\2bc8639cc65bbaec9670c58fa27963a3.exe
"C:\Users\Admin\AppData\Local\Temp\2bc8639cc65bbaec9670c58fa27963a3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3200
- C:\Users\Admin\AppData\Local\Temp\2bc8639cc65bbaec9670c58fa27963a3.exe
  "C:\Users\Admin\AppData\Local\Temp\2bc8639cc65bbaec9670c58fa27963a3.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:4832
- - C:\Users\Admin\AppData\Local\Temp\u3q8.0.exe
    "C:\Users\Admin\AppData\Local\Temp\u3q8.0.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1856
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\u3q8.0.exe" & del "C:\ProgramData\*.dll"" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1696
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 5
        5⤵
        Delays execution with timeout.exe
        
        PID:2612
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1856 -s 2480
      4⤵
      Program crash
      PID:1944
- - C:\Users\Admin\AppData\Local\Temp\u3q8.1.exe
    "C:\Users\Admin\AppData\Local\Temp\u3q8.1.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4036
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4056
    - - C:\Windows\SysWOW64\chcp.com
        
        chcp 1251
        5⤵
        
        PID:4500
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F
        5⤵
        Creates scheduled task(s)
        
        PID:2104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1856 -ip 1856
1⤵
PID:4100

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

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Downloads

C:\ProgramData\Are.docx

Filesize
11KB

MD5
a33e5b189842c5867f46566bdbf7a095

SHA1
e1c06359f6a76da90d19e8fd95e79c832edb3196

SHA256
5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454

SHA512
f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b

Download Submit
C:\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
C:\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3q8.0.exe

Filesize
336KB

MD5
e237fdcba5d16c232655e2df8a9149ee

SHA1
74922bea56c72af362ae74164049a60356cd2d92

SHA256
f806666096ff034305a3610d4a209de5fc8f2c95cb9fb4d396ce04dd663c0fec

SHA512
b6e033cae499a54b0ee443f1f45b9bd78a7a719ad7a4e7cf3bbd989e039da8d1739b252d02b6fe519898a8476efc7d455611134c7e3ad367751f1795da57e19b

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3q8.1.exe

Filesize
4.7MB

MD5
5e94f0f6265f9e8b2f706f1d46bbd39e

SHA1
d0189cba430f5eea07efe1ab4f89adf5ae2453db

SHA256
50a46b3120da828502ef0caba15defbad004a3adb88e6eacf1f9604572e2d503

SHA512
473dfa66a36feed9b29a43245074141478327ce22ba7cce512599379dcb783b4d665e2d65c5e9750b988c7ed8f6c3349a7a12d4b8b57c89840eee6ca6e1a30cd

Download Submit
C:\Users\Admin\AppData\Roaming\Temp\Task.bat

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
memory/1856-35-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1856-21-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/1856-19-0x0000000000800000-0x0000000000900000-memory.dmp

Filesize
1024KB

Download
memory/1856-20-0x0000000000790000-0x00000000007AC000-memory.dmp

Filesize
112KB

Download
memory/1856-116-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/1856-114-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/3200-2-0x0000000002DD0000-0x0000000002E37000-memory.dmp

Filesize
412KB

Download
memory/3200-1-0x0000000002BC0000-0x0000000002CC0000-memory.dmp

Filesize
1024KB

Download
memory/4036-118-0x00000000028E0000-0x00000000028E1000-memory.dmp

Filesize
4KB

Download
memory/4036-34-0x00000000028E0000-0x00000000028E1000-memory.dmp

Filesize
4KB

Download
memory/4036-115-0x0000000000400000-0x00000000008E2000-memory.dmp

Filesize
4.9MB

Download
memory/4832-4-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/4832-3-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/4832-5-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/4832-6-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/4832-32-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download