stealc | 9742004629e0fd88ab25a197674ff01f6553feb8781adc7549f2b16a3eb704d8

Analysis

max time kernel
136s
max time network
137s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
09-05-2024 10:06

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General

Target

9742004629e0fd88ab25a197674ff01f6553feb8781adc7549f2b16a3eb704d8.exe
Size

382KB
MD5

d3b03da8cc7dcf4d1382156cb005a36e
SHA1

b9a8fd0151345adadd318b688295e267a55284ab
SHA256

9742004629e0fd88ab25a197674ff01f6553feb8781adc7549f2b16a3eb704d8
SHA512

64733d56c806a3b94b569eeb12fc709477f87b0c75a1255d1c559dc7495642f4a365615e40275d50d861b7c8c7ab180c0173ab5eedbd9709fb43a56d5e1e1a53
SSDEEP

6144:L0NTKE3CDWHhQgoFZHaJtrzQr792AiXQvdUodm7iKMceJK2q:L0NGMCaXoFdAFzQrJviXq3w7IJK2q

Score

10^/10

stealc zgrat discovery rat spyware stealer

Malware Config

Extracted

Family

stealc

http://185.172.128.150

Attributes

url_path
/c698e1bc8a2f5e6d.php

Signatures

Detect ZGRat V1 3 IoCs

resource	yara_rule
behavioral1/memory/1168-81-0x000001C584D00000-0x000001C588534000-memory.dmp	family_zgrat_v1
behavioral1/memory/1168-82-0x000001C5A4540000-0x000001C5A464A000-memory.dmp	family_zgrat_v1
behavioral1/memory/1168-86-0x000001C5A2B00000-0x000001C5A2B24000-memory.dmp	family_zgrat_v1

Stealc
Stealc is an infostealer written in C++.
stealer stealc
ZGRat
ZGRat is remote access trojan written in C#.
rat zgrat
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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	9742004629e0fd88ab25a197674ff01f6553feb8781adc7549f2b16a3eb704d8.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	u3jk.0.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	u3jk.1.exe

Executes dropped EXE 2 IoCs

pid	Process
1444	u3jk.0.exe
4028	u3jk.1.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
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
4796	4592	WerFault.exe	80
3720	1444	WerFault.exe	84

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	u3jk.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3jk.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3jk.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	u3jk.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3jk.0.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1924	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1444	u3jk.0.exe
1444	u3jk.0.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1168	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
4028	u3jk.1.exe
4028	u3jk.1.exe
4028	u3jk.1.exe
4028	u3jk.1.exe
4028	u3jk.1.exe
4028	u3jk.1.exe
4028	u3jk.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
4028	u3jk.1.exe
4028	u3jk.1.exe
4028	u3jk.1.exe
4028	u3jk.1.exe
4028	u3jk.1.exe
4028	u3jk.1.exe
4028	u3jk.1.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4592 wrote to memory of 1444	4592	9742004629e0fd88ab25a197674ff01f6553feb8781adc7549f2b16a3eb704d8.exe	84
PID 4592 wrote to memory of 1444	4592	9742004629e0fd88ab25a197674ff01f6553feb8781adc7549f2b16a3eb704d8.exe	84
PID 4592 wrote to memory of 1444	4592	9742004629e0fd88ab25a197674ff01f6553feb8781adc7549f2b16a3eb704d8.exe	84
PID 4592 wrote to memory of 4028	4592	9742004629e0fd88ab25a197674ff01f6553feb8781adc7549f2b16a3eb704d8.exe	86
PID 4592 wrote to memory of 4028	4592	9742004629e0fd88ab25a197674ff01f6553feb8781adc7549f2b16a3eb704d8.exe	86
PID 4592 wrote to memory of 4028	4592	9742004629e0fd88ab25a197674ff01f6553feb8781adc7549f2b16a3eb704d8.exe	86
PID 1444 wrote to memory of 3616	1444	u3jk.0.exe	91
PID 1444 wrote to memory of 3616	1444	u3jk.0.exe	91
PID 1444 wrote to memory of 3616	1444	u3jk.0.exe	91
PID 3616 wrote to memory of 1924	3616	cmd.exe	95
PID 3616 wrote to memory of 1924	3616	cmd.exe	95
PID 3616 wrote to memory of 1924	3616	cmd.exe	95
PID 4028 wrote to memory of 1168	4028	u3jk.1.exe	96
PID 4028 wrote to memory of 1168	4028	u3jk.1.exe	96

C:\Users\Admin\AppData\Local\Temp\9742004629e0fd88ab25a197674ff01f6553feb8781adc7549f2b16a3eb704d8.exe
"C:\Users\Admin\AppData\Local\Temp\9742004629e0fd88ab25a197674ff01f6553feb8781adc7549f2b16a3eb704d8.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4592
- C:\Users\Admin\AppData\Local\Temp\u3jk.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3jk.0.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1444
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\u3jk.0.exe" & del "C:\ProgramData\*.dll"" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3616
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 5
      4⤵
      Delays execution with timeout.exe
      PID:1924
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1444 -s 1304
    3⤵
    - Program crash
    PID:3720
- C:\Users\Admin\AppData\Local\Temp\u3jk.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3jk.1.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4028
- - C:\Users\Admin\AppData\Local\Temp\iolo\dm\SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
    "C:\Users\Admin\AppData\Local\Temp\iolo\dm\SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe" /eieci=11A12794-499E-4FA0-A281-A9A9AA8B2685 /eipi=5488CB36-BE62-4606-B07B-2EE938868BD1
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1168
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4592 -s 1152
  2⤵
  - Program crash
  PID:4796

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4592 -ip 4592
1⤵
PID:3456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1444 -ip 1444
1⤵
PID:844

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

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\iolo\dm\ioloDMLog.txt

Filesize
3KB

MD5
09b43a55a294b57a502ceb597683cafd

SHA1
a77db66b0af238338531b4c2c546fd275779c4dc

SHA256
2a9594d1639da02dc0f22f3cac9546e27458f7b89dad849d7a76258955bda896

SHA512
2804decd7f6c72b6d18a384d7c3ccc55845b4d4d4fdd399cd9012fff59e8253b8d1fa77bf964686a60b457655cd22cc41da137f2955cde7d4e96693740b45322

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3jk.0.exe

Filesize
240KB

MD5
a5a396650cc1831759ee447062d4593a

SHA1
37bd8f9b348b16378ea9023489243b8725addf82

SHA256
a1f50375231c83613bd18aee62fdeccb52c06445d1eebf5fc7293246746f24a5

SHA512
a3063b2168164df6fd19cec76c7f07f30c4dae3fa5c00b7efb9c3005edbf564705701adbba575280373c916cf31e6450b246d6046de5ca384897d2751ffc2d4c

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3jk.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1168-99-0x000001C5A8BE0000-0x000001C5A8C18000-memory.dmp

Filesize
224KB

Download
memory/1168-100-0x000001C5A8BB0000-0x000001C5A8BBE000-memory.dmp

Filesize
56KB

Download
memory/1168-110-0x000001C5A4BB0000-0x000001C5A4BCE000-memory.dmp

Filesize
120KB

Download
memory/1168-86-0x000001C5A2B00000-0x000001C5A2B24000-memory.dmp

Filesize
144KB

Download
memory/1168-87-0x000001C5A2B20000-0x000001C5A2B2A000-memory.dmp

Filesize
40KB

Download
memory/1168-108-0x000001C5A9AF0000-0x000001C5A9AFC000-memory.dmp

Filesize
48KB

Download
memory/1168-105-0x000001C5AA300000-0x000001C5AA828000-memory.dmp

Filesize
5.2MB

Download
memory/1168-104-0x000001C5A9AD0000-0x000001C5A9AF2000-memory.dmp

Filesize
136KB

Download
memory/1168-103-0x000001C5A9D70000-0x000001C5A9DD2000-memory.dmp

Filesize
392KB

Download
memory/1168-102-0x000001C5A9D50000-0x000001C5A9D5A000-memory.dmp

Filesize
40KB

Download
memory/1168-101-0x000001C5A8BD0000-0x000001C5A8BD8000-memory.dmp

Filesize
32KB

Download
memory/1168-98-0x000001C5A92A0000-0x000001C5A92A8000-memory.dmp

Filesize
32KB

Download
memory/1168-96-0x000001C5A4890000-0x000001C5A4B90000-memory.dmp

Filesize
3.0MB

Download
memory/1168-81-0x000001C584D00000-0x000001C588534000-memory.dmp

Filesize
56.2MB

Download
memory/1168-82-0x000001C5A4540000-0x000001C5A464A000-memory.dmp

Filesize
1.0MB

Download
memory/1168-83-0x000001C58A2B0000-0x000001C58A2C0000-memory.dmp

Filesize
64KB

Download
memory/1168-84-0x000001C5A2AB0000-0x000001C5A2ABC000-memory.dmp

Filesize
48KB

Download
memory/1168-85-0x000001C5A2AA0000-0x000001C5A2AB4000-memory.dmp

Filesize
80KB

Download
memory/1168-92-0x000001C5A2B40000-0x000001C5A2B4A000-memory.dmp

Filesize
40KB

Download
memory/1168-109-0x000001C5A4C50000-0x000001C5A4CC6000-memory.dmp

Filesize
472KB

Download
memory/1168-89-0x000001C5A4790000-0x000001C5A4842000-memory.dmp

Filesize
712KB

Download
memory/1168-88-0x000001C5A4380000-0x000001C5A43AA000-memory.dmp

Filesize
168KB

Download
memory/1168-90-0x000001C5A4840000-0x000001C5A4890000-memory.dmp

Filesize
320KB

Download
memory/1168-91-0x000001C5A43E0000-0x000001C5A4402000-memory.dmp

Filesize
136KB

Download
memory/1444-38-0x0000000000400000-0x0000000002AF9000-memory.dmp

Filesize
39.0MB

Download
memory/1444-77-0x0000000000400000-0x0000000002AF9000-memory.dmp

Filesize
39.0MB

Download
memory/1444-57-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1444-39-0x0000000000400000-0x0000000002AF9000-memory.dmp

Filesize
39.0MB

Download
memory/4028-80-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4028-56-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4592-2-0x00000000047F0000-0x000000000485C000-memory.dmp

Filesize
432KB

Download
memory/4592-1-0x0000000002CF0000-0x0000000002DF0000-memory.dmp

Filesize
1024KB

Download
memory/4592-33-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4592-16-0x0000000000400000-0x0000000002B1D000-memory.dmp

Filesize
39.1MB

Download
memory/4592-31-0x0000000000400000-0x0000000002B1D000-memory.dmp

Filesize
39.1MB

Download
memory/4592-32-0x00000000047F0000-0x000000000485C000-memory.dmp

Filesize
432KB

Download
memory/4592-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download