stealc | ff38e0f9a9a2980d54e1430b269e9d7751c0c181409426d8391eb898be766000

Analysis

max time kernel
145s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 06:02

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General

Target

ff38e0f9a9a2980d54e1430b269e9d7751c0c181409426d8391eb898be766000.exe
Size

430KB
MD5

bb5c3b9138337d28e4975d34af583e1c
SHA1

7ec8f026743edad6b92418bfa1c66950558ff169
SHA256

ff38e0f9a9a2980d54e1430b269e9d7751c0c181409426d8391eb898be766000
SHA512

932d06eabed378f0b92c052765eef265424a676339107497999d41e6a641703b7877d3204db30dc9b83dd24e570f371684a9b89af73b3cd9737e13e5945429bc
SSDEEP

6144:WA9Kay5V+iwqNJ8wH8COxLW10sHtiUh0CrvWqI3CjAD9Ro1:N9KaMV4qL8mlEW1BHAdCDWqsxa1

Score

10^/10

stealc discovery spyware stealer upx

Malware Config

Extracted

Family

stealc

http://185.172.128.209

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 3 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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	ff38e0f9a9a2980d54e1430b269e9d7751c0c181409426d8391eb898be766000.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	u16s.0.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	IECFHDBAAE.exe

Executes dropped EXE 3 IoCs

pid	Process
4700	u16s.0.exe
376	u16s.1.exe
3304	IECFHDBAAE.exe

Loads dropped DLL 2 IoCs

pid	Process
4700	u16s.0.exe
4700	u16s.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

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x00070000000231f2-20.dat	upx
behavioral1/memory/376-26-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral1/memory/376-121-0x0000000000400000-0x0000000000930000-memory.dmp	upx

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
3488	1540	WerFault.exe	84
4708	4700	WerFault.exe	85

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	u16s.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u16s.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
4464	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2512	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4700	u16s.0.exe
4700	u16s.0.exe
4700	u16s.0.exe
4700	u16s.0.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
376	u16s.1.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1540 wrote to memory of 4700	1540	ff38e0f9a9a2980d54e1430b269e9d7751c0c181409426d8391eb898be766000.exe	85
PID 1540 wrote to memory of 4700	1540	ff38e0f9a9a2980d54e1430b269e9d7751c0c181409426d8391eb898be766000.exe	85
PID 1540 wrote to memory of 4700	1540	ff38e0f9a9a2980d54e1430b269e9d7751c0c181409426d8391eb898be766000.exe	85
PID 1540 wrote to memory of 376	1540	ff38e0f9a9a2980d54e1430b269e9d7751c0c181409426d8391eb898be766000.exe	87
PID 1540 wrote to memory of 376	1540	ff38e0f9a9a2980d54e1430b269e9d7751c0c181409426d8391eb898be766000.exe	87
PID 1540 wrote to memory of 376	1540	ff38e0f9a9a2980d54e1430b269e9d7751c0c181409426d8391eb898be766000.exe	87
PID 376 wrote to memory of 2568	376	u16s.1.exe	91
PID 376 wrote to memory of 2568	376	u16s.1.exe	91
PID 376 wrote to memory of 2568	376	u16s.1.exe	91
PID 2568 wrote to memory of 868	2568	cmd.exe	93
PID 2568 wrote to memory of 868	2568	cmd.exe	93
PID 2568 wrote to memory of 868	2568	cmd.exe	93
PID 2568 wrote to memory of 4464	2568	cmd.exe	94
PID 2568 wrote to memory of 4464	2568	cmd.exe	94
PID 2568 wrote to memory of 4464	2568	cmd.exe	94
PID 4700 wrote to memory of 3612	4700	u16s.0.exe	100
PID 4700 wrote to memory of 3612	4700	u16s.0.exe	100
PID 4700 wrote to memory of 3612	4700	u16s.0.exe	100
PID 3612 wrote to memory of 3304	3612	cmd.exe	104
PID 3612 wrote to memory of 3304	3612	cmd.exe	104
PID 3612 wrote to memory of 3304	3612	cmd.exe	104
PID 3304 wrote to memory of 2352	3304	IECFHDBAAE.exe	105
PID 3304 wrote to memory of 2352	3304	IECFHDBAAE.exe	105
PID 3304 wrote to memory of 2352	3304	IECFHDBAAE.exe	105
PID 2352 wrote to memory of 2512	2352	cmd.exe	107
PID 2352 wrote to memory of 2512	2352	cmd.exe	107
PID 2352 wrote to memory of 2512	2352	cmd.exe	107

C:\Users\Admin\AppData\Local\Temp\ff38e0f9a9a2980d54e1430b269e9d7751c0c181409426d8391eb898be766000.exe
"C:\Users\Admin\AppData\Local\Temp\ff38e0f9a9a2980d54e1430b269e9d7751c0c181409426d8391eb898be766000.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1540
- C:\Users\Admin\AppData\Local\Temp\u16s.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u16s.0.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4700
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\IECFHDBAAE.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3612
  - - C:\Users\Admin\AppData\Local\Temp\IECFHDBAAE.exe
      "C:\Users\Admin\AppData\Local\Temp\IECFHDBAAE.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:3304
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\IECFHDBAAE.exe
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2352
      - C:\Windows\SysWOW64\PING.EXE
        
        ping 2.2.2.2 -n 1 -w 3000
        6⤵
        Runs ping.exe
        
        PID:2512
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4700 -s 2288
    3⤵
    - Program crash
    PID:4708
- C:\Users\Admin\AppData\Local\Temp\u16s.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u16s.1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:376
- - 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:2568
  - - C:\Windows\SysWOW64\chcp.com
      chcp 1251
      4⤵
      PID:868
  - - 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:4464
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1540 -s 1000
  2⤵
  - Program crash
  PID:3488

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1540 -ip 1540
1⤵
PID:2064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4700 -ip 4700
1⤵
PID:3096

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

Remote System Discovery

T1018

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\IECFHDBAAE.exe

Filesize
106KB

MD5
fe380780b5c35bd6d54541791151c2be

SHA1
7fe3a583cf91474c733f85cebf3c857682e269e1

SHA256
b64a84d1f88e4e78464a1901c1cb5bbd5f00bb73203d719e64e072157a087b53

SHA512
ba05ba8aa13c4bc1cf98fbf6c08b021e8b19354098e0397fc8e1e5d3dcce367c1063203f24e50d0973193f6535681d0a43486e5dade5d112853b7a2fe8739b6c

Download Submit
C:\Users\Admin\AppData\Local\Temp\u16s.0.exe

Filesize
286KB

MD5
5a718328588af3b3d3834f0816ff966d

SHA1
cd59524ade491e25011a22674ea190da16f68bfd

SHA256
9c0b79eeff6f154798d89740d131b47b570cf424dfc31d2cdb768fd4397c6517

SHA512
f752b89ecb0645f7f887fbe22bbe8296a0cbbf86ddc46eacf598295e21db6db52618e42ff74b6d1c2085c60fd1d95bd1c89a787fe55971536ec2b93c2f6e116b

Download Submit
C:\Users\Admin\AppData\Local\Temp\u16s.1.exe

Filesize
1.7MB

MD5
eee5ddcffbed16222cac0a1b4e2e466e

SHA1
28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

SHA256
2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

SHA512
8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

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

Filesize
128B

MD5
11bb3db51f701d4e42d3287f71a6a43e

SHA1
63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

SHA256
6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

SHA512
907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

Download Submit
memory/376-27-0x0000000002830000-0x0000000002831000-memory.dmp

Filesize
4KB

Download
memory/376-26-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/376-121-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/376-123-0x0000000002830000-0x0000000002831000-memory.dmp

Filesize
4KB

Download
memory/1540-1-0x0000000000D90000-0x0000000000E90000-memory.dmp

Filesize
1024KB

Download
memory/1540-28-0x0000000000400000-0x0000000000B14000-memory.dmp

Filesize
7.1MB

Download
memory/1540-3-0x00000000028B0000-0x000000000291E000-memory.dmp

Filesize
440KB

Download
memory/1540-2-0x0000000000400000-0x0000000000B14000-memory.dmp

Filesize
7.1MB

Download
memory/3304-115-0x00000000720C0000-0x0000000072870000-memory.dmp

Filesize
7.7MB

Download
memory/3304-114-0x0000000000DC0000-0x0000000000DE0000-memory.dmp

Filesize
128KB

Download
memory/3304-117-0x00000000057D0000-0x00000000057E0000-memory.dmp

Filesize
64KB

Download
memory/3304-120-0x00000000720C0000-0x0000000072870000-memory.dmp

Filesize
7.7MB

Download
memory/4700-29-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/4700-15-0x0000000000400000-0x0000000000AF1000-memory.dmp

Filesize
6.9MB

Download
memory/4700-116-0x0000000000400000-0x0000000000AF1000-memory.dmp

Filesize
6.9MB

Download
memory/4700-14-0x0000000002610000-0x0000000002637000-memory.dmp

Filesize
156KB

Download
memory/4700-13-0x0000000000B20000-0x0000000000C20000-memory.dmp

Filesize
1024KB

Download