stealc | 3f84cc7c627ef090ff5a74cc1af4c9de2e31baea3bfde4b1bcb24310804c3dce

Analysis

max time kernel
146s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
04/04/2024, 09:18

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General

Target
3f84cc7c627ef090ff5a74cc1af4c9de2e31baea3bfde4b1bcb24310804c3dce.exe
Size 359KB
Sample240404-k91xdsbc2w
SHA256 3f84cc7c627ef090ff5a74cc1af4c9de2e31baea3bfde4b1bcb24310804c3dce
MD5 a9aa00d4c39736c1e257c2e0fad58602
SHA1 d721c8f6ce40e7c4c5fce09d7c98b7f96f8d5099
SHA512 3a0ca03c5d5b74b56fabedb1050b17613a389392057885c5d4623c273a6f2a1c539c4ce4532669d4217bb73af98fbd164ed028cd906ac6c602fa55cdf173222c
SSDEEP 6144:0aqCRtNWgeLyB1yX1/YvTtmM0EAMXFb9ZhEDek7dfvHlBuTCCrjQ75I:ICPNWgeLtATt/0vz6kJn/uTC35I
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc discovery spyware stealer

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

Executes dropped EXE 3 IoCs

pid	Process
3168	u2po.0.exe
3192	u2po.1.exe
2376	EBFBFBFIIJ.exe

Loads dropped DLL 2 IoCs

pid	Process
3168	u2po.0.exe
3168	u2po.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
2940	3516	WerFault.exe	77
5112	3168	WerFault.exe	78

Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2po.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2po.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2po.1.exe

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	u2po.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u2po.0.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1592	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3168	u2po.0.exe
3168	u2po.0.exe
3168	u2po.0.exe
3168	u2po.0.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
3192	u2po.1.exe
3192	u2po.1.exe
3192	u2po.1.exe
3192	u2po.1.exe
3192	u2po.1.exe
3192	u2po.1.exe
3192	u2po.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
3192	u2po.1.exe
3192	u2po.1.exe
3192	u2po.1.exe
3192	u2po.1.exe
3192	u2po.1.exe
3192	u2po.1.exe
3192	u2po.1.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3516 wrote to memory of 3168	3516	3f84cc7c627ef090ff5a74cc1af4c9de2e31baea3bfde4b1bcb24310804c3dce.exe	78
PID 3516 wrote to memory of 3168	3516	3f84cc7c627ef090ff5a74cc1af4c9de2e31baea3bfde4b1bcb24310804c3dce.exe	78
PID 3516 wrote to memory of 3168	3516	3f84cc7c627ef090ff5a74cc1af4c9de2e31baea3bfde4b1bcb24310804c3dce.exe	78
PID 3516 wrote to memory of 3192	3516	3f84cc7c627ef090ff5a74cc1af4c9de2e31baea3bfde4b1bcb24310804c3dce.exe	81
PID 3516 wrote to memory of 3192	3516	3f84cc7c627ef090ff5a74cc1af4c9de2e31baea3bfde4b1bcb24310804c3dce.exe	81
PID 3516 wrote to memory of 3192	3516	3f84cc7c627ef090ff5a74cc1af4c9de2e31baea3bfde4b1bcb24310804c3dce.exe	81
PID 3168 wrote to memory of 2168	3168	u2po.0.exe	86
PID 3168 wrote to memory of 2168	3168	u2po.0.exe	86
PID 3168 wrote to memory of 2168	3168	u2po.0.exe	86
PID 2168 wrote to memory of 2376	2168	cmd.exe	90
PID 2168 wrote to memory of 2376	2168	cmd.exe	90
PID 2168 wrote to memory of 2376	2168	cmd.exe	90
PID 2376 wrote to memory of 1732	2376	EBFBFBFIIJ.exe	91
PID 2376 wrote to memory of 1732	2376	EBFBFBFIIJ.exe	91
PID 2376 wrote to memory of 1732	2376	EBFBFBFIIJ.exe	91
PID 1732 wrote to memory of 1592	1732	cmd.exe	93
PID 1732 wrote to memory of 1592	1732	cmd.exe	93
PID 1732 wrote to memory of 1592	1732	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\3f84cc7c627ef090ff5a74cc1af4c9de2e31baea3bfde4b1bcb24310804c3dce.exe
"C:\Users\Admin\AppData\Local\Temp\3f84cc7c627ef090ff5a74cc1af4c9de2e31baea3bfde4b1bcb24310804c3dce.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3516
- C:\Users\Admin\AppData\Local\Temp\u2po.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u2po.0.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3168
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\EBFBFBFIIJ.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2168
  - - C:\Users\Admin\AppData\Local\Temp\EBFBFBFIIJ.exe
      "C:\Users\Admin\AppData\Local\Temp\EBFBFBFIIJ.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:2376
    - - 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\EBFBFBFIIJ.exe
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1732
      - C:\Windows\SysWOW64\PING.EXE
        
        ping 2.2.2.2 -n 1 -w 3000
        6⤵
        Runs ping.exe
        
        PID:1592
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3168 -s 2440
    3⤵
    - Program crash
    PID:5112
- C:\Users\Admin\AppData\Local\Temp\u2po.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u2po.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:3192
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3516 -s 1164
  2⤵
  - Program crash
  PID:2940

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3516 -ip 3516
1⤵
PID:2880

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 3168 -ip 3168
1⤵
PID:4220

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

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

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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EBFBFBFIIJ.exe

Path C:\Users\Admin\AppData\Local\Temp\EBFBFBFIIJ.exe
Size 106KB
SHA256 b64a84d1f88e4e78464a1901c1cb5bbd5f00bb73203d719e64e072157a087b53
MD5 fe380780b5c35bd6d54541791151c2be
SHA1 7fe3a583cf91474c733f85cebf3c857682e269e1
SHA512 ba05ba8aa13c4bc1cf98fbf6c08b021e8b19354098e0397fc8e1e5d3dcce367c1063203f24e50d0973193f6535681d0a43486e5dade5d112853b7a2fe8739b6c
SSDEEP 1536:lIpbrxKOcuS11Phbiyn2TCdfGyJVGJkyrt517EwM+UPpe5xKOcuS11Phbiyn2TCf:KpbrsISnRGPJkGt74GsISnRF
MD5 SHA1 SHA512 SSDEEP

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ioloDMLog.txt

Path C:\Users\Admin\AppData\Local\Temp\iolo\dm\ioloDMLog.txt
Size 2KB
SHA256 c9a8dfaefb4a45052dea1c9abf82f74bdc2ecccdfef3b50c155639a087fec0c0
MD5 20341cf6a92c17b2c66eaffec76aac6b
SHA1 1c4c3f9d8c5d2da4de6f82b2656597bbe7ae8014
SHA512 41833b5892e0c7d3183cd90fa08c47e7b5e589bf3b36186533feda9158f7dce544fb4b4705371b597fd964f2dd8417dd63e5652ebc972ae22047da9e16c844e7
MD5 SHA1 SHA512

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u2po.0.exe

Path C:\Users\Admin\AppData\Local\Temp\u2po.0.exe
Size 218KB
SHA256 e68fcf0bc81f3cea00e64cff8e8619d026615d8804501872140e6cb7f3f8cfbe
MD5 d571a82480345dd14b7986c3c61ba6b0
SHA1 8c7c794c7c5e114e1479f63ed8efc2c35d5805b7
SHA512 76eeea20fd805de0d338b49c4988b6b880c85cfcf8385739924cca2d53de903fc73c92c42a7151374a0d88ed2bacfc6432829e37db4f5ee19364b1dd1e65c7b8
SSDEEP 3072:6Aerqnq/YOqRVJ74cGYBZVhSJJRCsUqgMUC7rCcWhXGNS3O8FAvZ6rg3:6dqnq/YOqRf7fZXSJALcHNOIm
MD5 SHA1 SHA512 SSDEEP

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u2po.1.exe

Path C:\Users\Admin\AppData\Local\Temp\u2po.1.exe
Size 4.6MB
SHA256 4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7
MD5 397926927bca55be4a77839b1c44de6e
SHA1 e10f3434ef3021c399dbba047832f02b3c898dbd
SHA512 cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954
SSDEEP 49152:1ZRCckM8wwGbtBiRFWSGqCW4FL5wslsAEL1ksS2NHsF3TjZ1I6bqmHC0Jg:1ZRCwrb64XwWsAwFaFXxg
MD5 SHA1 SHA512 SSDEEP

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memory/2376-159-0x0000000071DA0000-0x0000000072551000-memory.dmp

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memory/2376-156-0x0000000005920000-0x0000000005930000-memory.dmp

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memory/2376-153-0x0000000000F80000-0x0000000000FA0000-memory.dmp

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memory/2376-154-0x0000000071DA0000-0x0000000072551000-memory.dmp

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memory/3168-14-0x0000000004860000-0x0000000004887000-memory.dmp

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memory/3168-38-0x0000000000400000-0x0000000002B60000-memory.dmp

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memory/3168-15-0x0000000000400000-0x0000000002B60000-memory.dmp

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memory/3168-145-0x0000000000400000-0x0000000002B60000-memory.dmp

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memory/3168-56-0x0000000002D70000-0x0000000002E70000-memory.dmp

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memory/3168-57-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/3168-104-0x0000000000400000-0x0000000002B60000-memory.dmp

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memory/3168-13-0x0000000002D70000-0x0000000002E70000-memory.dmp

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memory/3168-155-0x0000000000400000-0x0000000002B60000-memory.dmp

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memory/3192-54-0x0000000000400000-0x00000000008AD000-memory.dmp

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memory/3192-120-0x0000000000400000-0x00000000008AD000-memory.dmp

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memory/3192-112-0x0000000002760000-0x0000000002761000-memory.dmp

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memory/3192-105-0x0000000000400000-0x00000000008AD000-memory.dmp

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memory/3192-27-0x0000000002760000-0x0000000002761000-memory.dmp

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memory/3516-1-0x0000000002E70000-0x0000000002F70000-memory.dmp

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memory/3516-33-0x0000000004A60000-0x0000000004ACC000-memory.dmp

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memory/3516-32-0x0000000000400000-0x0000000002B83000-memory.dmp

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memory/3516-16-0x0000000000400000-0x0000000002B83000-memory.dmp

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memory/3516-3-0x0000000000400000-0x0000000002B83000-memory.dmp

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memory/3516-2-0x0000000004A60000-0x0000000004ACC000-memory.dmp

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