stealc | 5a5b68f275349f23ef28f8139ac314f3ffdb7cffbe04954905d0366cab74b586

Analysis

max time kernel
147s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
08-05-2024 19:17

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General

Target

5a5b68f275349f23ef28f8139ac314f3ffdb7cffbe04954905d0366cab74b586.exe
Size

364KB
MD5

05a44e1d4a4b66a51b1ef3a7b4e89942
SHA1

3894886a7a0d588c83c425e965de01359521d078
SHA256

5a5b68f275349f23ef28f8139ac314f3ffdb7cffbe04954905d0366cab74b586
SHA512

cbf529a67bf18817d218c503839509ed29f14e7c7b7abd2a0b4b2ea93e4a926c4f2ab3edc06440ed56c2d0a28dd5bff83262c3305a112f366dadaf4dbff96116
SSDEEP

6144:US0t5FW7l8UYZb1jNb41/6vpo+kveaeldhFeyf8rSYMOLcPZuBkT7YKkUT3fgK:US0nY7+5ao6DmlLhFerrSYMOEZuBkPTf

Score

10^/10

stealc zgrat discovery rat stealer

Malware Config

Extracted

Family

stealc

http://185.172.128.150

Attributes

url_path
/c698e1bc8a2f5e6d.php

Signatures

Detect ZGRat V1 2 IoCs

resource	yara_rule
behavioral2/memory/2944-72-0x000002BDD1C50000-0x000002BDD1C74000-memory.dmp	family_zgrat_v1
behavioral2/memory/2944-68-0x000002BDD1B30000-0x000002BDD1C3A000-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

Executes dropped EXE 2 IoCs

pid	Process
4120	u3ck.0.exe
2376	u3ck.1.exe

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
1096	4340	WerFault.exe	78
1096	4120	WerFault.exe	81

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	u3ck.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3ck.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3ck.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	u3ck.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3ck.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4120	u3ck.0.exe
4120	u3ck.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2944	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2376	u3ck.1.exe
2376	u3ck.1.exe
2376	u3ck.1.exe
2376	u3ck.1.exe
2376	u3ck.1.exe
2376	u3ck.1.exe
2376	u3ck.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2376	u3ck.1.exe
2376	u3ck.1.exe
2376	u3ck.1.exe
2376	u3ck.1.exe
2376	u3ck.1.exe
2376	u3ck.1.exe
2376	u3ck.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4340 wrote to memory of 4120	4340	5a5b68f275349f23ef28f8139ac314f3ffdb7cffbe04954905d0366cab74b586.exe	81
PID 4340 wrote to memory of 4120	4340	5a5b68f275349f23ef28f8139ac314f3ffdb7cffbe04954905d0366cab74b586.exe	81
PID 4340 wrote to memory of 4120	4340	5a5b68f275349f23ef28f8139ac314f3ffdb7cffbe04954905d0366cab74b586.exe	81
PID 4340 wrote to memory of 2376	4340	5a5b68f275349f23ef28f8139ac314f3ffdb7cffbe04954905d0366cab74b586.exe	84
PID 4340 wrote to memory of 2376	4340	5a5b68f275349f23ef28f8139ac314f3ffdb7cffbe04954905d0366cab74b586.exe	84
PID 4340 wrote to memory of 2376	4340	5a5b68f275349f23ef28f8139ac314f3ffdb7cffbe04954905d0366cab74b586.exe	84
PID 2376 wrote to memory of 2944	2376	u3ck.1.exe	89
PID 2376 wrote to memory of 2944	2376	u3ck.1.exe	89

C:\Users\Admin\AppData\Local\Temp\5a5b68f275349f23ef28f8139ac314f3ffdb7cffbe04954905d0366cab74b586.exe
"C:\Users\Admin\AppData\Local\Temp\5a5b68f275349f23ef28f8139ac314f3ffdb7cffbe04954905d0366cab74b586.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4340
- C:\Users\Admin\AppData\Local\Temp\u3ck.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3ck.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4120
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 860
    3⤵
    - Program crash
    PID:1096
- C:\Users\Admin\AppData\Local\Temp\u3ck.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3ck.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2376
- - 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:2944
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4340 -s 1160
  2⤵
  - Program crash
  PID:1096

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4340 -ip 4340
1⤵
PID:4208

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 4120 -ip 4120
1⤵
PID:2124

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\u3ck.0.exe

Filesize
223KB

MD5
eba29f456da60d82c13021441b3d7798

SHA1
d1a4fe3c8002d5be2393e5ae92892232d8e4a78e

SHA256
5edef454c9c9622255eb8616c5cb841f80cfe6cfc470f3ac2d46ca6ad0b64ff1

SHA512
f47e99c4926e261c134db7198b98abe138a79db12a88a6112fc34770a7cd01ad2c1cb1c4ca71bb5290d22ef4d8d17901583eb519633a823fdd94db1843e3461f

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3ck.1.exe

Filesize
3.6MB

MD5
bdd4b83b24911fa921092e096d399ac9

SHA1
1a9d97edbce74e14676b7362a1f35ee87e934448

SHA256
86e8ec464f8b3a2877085e8f0e05d75f451f099cbd8d9973bad7a3e113145b4a

SHA512
ba1382c9cae8242f78ebc6c61a636c167e8efbd5500cd0848c1deb26708d17e033ebc19835677ceb68d96a1c7b5b49b091b047db070dfa31809bdcf3ea791f1d

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3ck.1.exe

Filesize
2.1MB

MD5
0ef4e27e914de46c682cd3d6f564d1cf

SHA1
aa00eb2e895a80e1e5881d1b4618c844858ecb21

SHA256
c7be7abeb3504d7eb53fa89e99029bea1e715fa4b3964ac0c54a298af5781f75

SHA512
a6c94949b67dc653fefd6e9b9726307c18e91ced8aa82be950561383b75c5823d5241a65d68157a7249ea34923148b0b1f877d5137e3dc44bbe076fb920b63f9

Download Submit
memory/2376-66-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2376-53-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2944-88-0x000002BDD6CA0000-0x000002BDD6CAA000-memory.dmp

Filesize
40KB

Download
memory/2944-82-0x000002BDD1F90000-0x000002BDD2290000-memory.dmp

Filesize
3.0MB

Download
memory/2944-97-0x000002BDD6A60000-0x000002BDD6A7E000-memory.dmp

Filesize
120KB

Download
memory/2944-95-0x000002BDD6B00000-0x000002BDD6B76000-memory.dmp

Filesize
472KB

Download
memory/2944-84-0x000002BDD69F0000-0x000002BDD69F8000-memory.dmp

Filesize
32KB

Download
memory/2944-85-0x000002BDD6330000-0x000002BDD6368000-memory.dmp

Filesize
224KB

Download
memory/2944-94-0x000002BDD6A20000-0x000002BDD6A2C000-memory.dmp

Filesize
48KB

Download
memory/2944-91-0x000002BDD7270000-0x000002BDD7798000-memory.dmp

Filesize
5.2MB

Download
memory/2944-86-0x000002BDD6300000-0x000002BDD630E000-memory.dmp

Filesize
56KB

Download
memory/2944-67-0x000002BDB3BA0000-0x000002BDB73D4000-memory.dmp

Filesize
56.2MB

Download
memory/2944-71-0x000002BDD19B0000-0x000002BDD19C4000-memory.dmp

Filesize
80KB

Download
memory/2944-72-0x000002BDD1C50000-0x000002BDD1C74000-memory.dmp

Filesize
144KB

Download
memory/2944-70-0x000002BDD19C0000-0x000002BDD19CC000-memory.dmp

Filesize
48KB

Download
memory/2944-76-0x000002BDD1F40000-0x000002BDD1F90000-memory.dmp

Filesize
320KB

Download
memory/2944-77-0x000002BDD1F10000-0x000002BDD1F32000-memory.dmp

Filesize
136KB

Download
memory/2944-75-0x000002BDD1E30000-0x000002BDD1EE2000-memory.dmp

Filesize
712KB

Download
memory/2944-74-0x000002BDD1DF0000-0x000002BDD1E1A000-memory.dmp

Filesize
168KB

Download
memory/2944-73-0x000002BDD1DD0000-0x000002BDD1DDA000-memory.dmp

Filesize
40KB

Download
memory/2944-78-0x000002BDD1980000-0x000002BDD198A000-memory.dmp

Filesize
40KB

Download
memory/2944-90-0x000002BDD6D20000-0x000002BDD6D42000-memory.dmp

Filesize
136KB

Download
memory/2944-69-0x000002BDD19A0000-0x000002BDD19B0000-memory.dmp

Filesize
64KB

Download
memory/2944-68-0x000002BDD1B30000-0x000002BDD1C3A000-memory.dmp

Filesize
1.0MB

Download
memory/2944-87-0x000002BDD6320000-0x000002BDD6328000-memory.dmp

Filesize
32KB

Download
memory/2944-89-0x000002BDD6CC0000-0x000002BDD6D22000-memory.dmp

Filesize
392KB

Download
memory/4120-13-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4120-105-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4120-103-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4120-15-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4120-101-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4120-14-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4120-96-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4340-1-0x0000000001BB0000-0x0000000001CB0000-memory.dmp

Filesize
1024KB

Download
memory/4340-36-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4340-35-0x0000000003760000-0x00000000037CC000-memory.dmp

Filesize
432KB

Download
memory/4340-34-0x0000000000400000-0x0000000001A25000-memory.dmp

Filesize
22.1MB

Download
memory/4340-2-0x0000000003760000-0x00000000037CC000-memory.dmp

Filesize
432KB

Download
memory/4340-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download