stealc | 9c4f9d4d6d4d6fbb87de616e5cc4677f2742e4d09d313aae95dc41f1a96c2571

Analysis

max time kernel
139s
max time network
141s
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, 20:00

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General

Target

9c4f9d4d6d4d6fbb87de616e5cc4677f2742e4d09d313aae95dc41f1a96c2571.exe
Size

364KB
MD5

d916c4ede41cf6b9ca2bdd7bd4f19005
SHA1

31c6d1f4876eec95862786ef6d993347fbfc656c
SHA256

9c4f9d4d6d4d6fbb87de616e5cc4677f2742e4d09d313aae95dc41f1a96c2571
SHA512

ccefa722cbf9b9062eeaf9730a0eba45e23ee3f6a84eba9423eefdfb6c812342d1634d52ea265e8a65592694cf015f1f31e12760ec46bcbe65aa323377cb9e68
SSDEEP

6144:9HjGRWK3W3yK7lKM6FBEwOaIbJp4U/BKfL/z22v2qDx6Anq4Ndy3YTDXgP:9DGEK3WiK7UMCbm6bfVDxrntTDXgP

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 3 IoCs

resource	yara_rule
behavioral2/memory/3360-70-0x000001DD2DD10000-0x000001DD31544000-memory.dmp	family_zgrat_v1
behavioral2/memory/3360-71-0x000001DD4BD60000-0x000001DD4BE6A000-memory.dmp	family_zgrat_v1
behavioral2/memory/3360-75-0x000001DD4BB50000-0x000001DD4BB74000-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
688	u3uw.0.exe
2060	u3uw.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
1480	5000	WerFault.exe	78
4296	688	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	u3uw.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3uw.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3uw.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	u3uw.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3uw.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
688	u3uw.0.exe
688	u3uw.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3360	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2060	u3uw.1.exe
2060	u3uw.1.exe
2060	u3uw.1.exe
2060	u3uw.1.exe
2060	u3uw.1.exe
2060	u3uw.1.exe
2060	u3uw.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2060	u3uw.1.exe
2060	u3uw.1.exe
2060	u3uw.1.exe
2060	u3uw.1.exe
2060	u3uw.1.exe
2060	u3uw.1.exe
2060	u3uw.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 5000 wrote to memory of 688	5000	9c4f9d4d6d4d6fbb87de616e5cc4677f2742e4d09d313aae95dc41f1a96c2571.exe	81
PID 5000 wrote to memory of 688	5000	9c4f9d4d6d4d6fbb87de616e5cc4677f2742e4d09d313aae95dc41f1a96c2571.exe	81
PID 5000 wrote to memory of 688	5000	9c4f9d4d6d4d6fbb87de616e5cc4677f2742e4d09d313aae95dc41f1a96c2571.exe	81
PID 5000 wrote to memory of 2060	5000	9c4f9d4d6d4d6fbb87de616e5cc4677f2742e4d09d313aae95dc41f1a96c2571.exe	84
PID 5000 wrote to memory of 2060	5000	9c4f9d4d6d4d6fbb87de616e5cc4677f2742e4d09d313aae95dc41f1a96c2571.exe	84
PID 5000 wrote to memory of 2060	5000	9c4f9d4d6d4d6fbb87de616e5cc4677f2742e4d09d313aae95dc41f1a96c2571.exe	84
PID 2060 wrote to memory of 3360	2060	u3uw.1.exe	89
PID 2060 wrote to memory of 3360	2060	u3uw.1.exe	89

C:\Users\Admin\AppData\Local\Temp\9c4f9d4d6d4d6fbb87de616e5cc4677f2742e4d09d313aae95dc41f1a96c2571.exe
"C:\Users\Admin\AppData\Local\Temp\9c4f9d4d6d4d6fbb87de616e5cc4677f2742e4d09d313aae95dc41f1a96c2571.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5000
- C:\Users\Admin\AppData\Local\Temp\u3uw.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3uw.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:688
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 688 -s 1368
    3⤵
    - Program crash
    PID:4296
- C:\Users\Admin\AppData\Local\Temp\u3uw.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3uw.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2060
- - 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:3360
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5000 -s 1184
  2⤵
  - Program crash
  PID:1480

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 5000 -ip 5000
1⤵
PID:2464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 688 -ip 688
1⤵
PID:1496

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\u3uw.0.exe

Filesize
223KB

MD5
280229b137b0f36f2b18b9bc7841995d

SHA1
d800c8ecc758ccacfe9a91efd45904efcc17b84a

SHA256
49533fc0ca008e430d35fdabab4b200a70e629e62f5b16f9157b5a82b6494536

SHA512
aeb7566ad83b6b1a01e2d8f6e557a18a75a8bd4229f72cc9e1b1ffe9dd86d14469937eea221e0d436274d4444d4f1732098b98ca3ddc3c7aec65867107fbdec5

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3uw.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/688-106-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/688-104-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/688-13-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/688-14-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/688-102-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/688-55-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/2060-54-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2060-69-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2060-66-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3360-89-0x000001DD50470000-0x000001DD5047E000-memory.dmp

Filesize
56KB

Download
memory/3360-81-0x000001DD31A30000-0x000001DD31A3A000-memory.dmp

Filesize
40KB

Download
memory/3360-99-0x000001DD50EE0000-0x000001DD50EFE000-memory.dmp

Filesize
120KB

Download
memory/3360-98-0x000001DD50F80000-0x000001DD50FF6000-memory.dmp

Filesize
472KB

Download
memory/3360-70-0x000001DD2DD10000-0x000001DD31544000-memory.dmp

Filesize
56.2MB

Download
memory/3360-71-0x000001DD4BD60000-0x000001DD4BE6A000-memory.dmp

Filesize
1.0MB

Download
memory/3360-73-0x000001DD4BB30000-0x000001DD4BB3C000-memory.dmp

Filesize
48KB

Download
memory/3360-72-0x000001DD31A60000-0x000001DD31A70000-memory.dmp

Filesize
64KB

Download
memory/3360-74-0x000001DD33360000-0x000001DD33374000-memory.dmp

Filesize
80KB

Download
memory/3360-75-0x000001DD4BB50000-0x000001DD4BB74000-memory.dmp

Filesize
144KB

Download
memory/3360-76-0x000001DD4BCD0000-0x000001DD4BCDA000-memory.dmp

Filesize
40KB

Download
memory/3360-77-0x000001DD4BD00000-0x000001DD4BD2A000-memory.dmp

Filesize
168KB

Download
memory/3360-78-0x000001DD4BFC0000-0x000001DD4C072000-memory.dmp

Filesize
712KB

Download
memory/3360-79-0x000001DD4C0C0000-0x000001DD4C110000-memory.dmp

Filesize
320KB

Download
memory/3360-80-0x000001DD4C110000-0x000001DD4C132000-memory.dmp

Filesize
136KB

Download
memory/3360-97-0x000001DD50BA0000-0x000001DD50BAC000-memory.dmp

Filesize
48KB

Download
memory/3360-85-0x000001DD4C140000-0x000001DD4C440000-memory.dmp

Filesize
3.0MB

Download
memory/3360-87-0x000001DD50B60000-0x000001DD50B68000-memory.dmp

Filesize
32KB

Download
memory/3360-88-0x000001DD504A0000-0x000001DD504D8000-memory.dmp

Filesize
224KB

Download
memory/3360-94-0x000001DD513E0000-0x000001DD51908000-memory.dmp

Filesize
5.2MB

Download
memory/3360-90-0x000001DD50490000-0x000001DD50498000-memory.dmp

Filesize
32KB

Download
memory/3360-91-0x000001DD50B80000-0x000001DD50B8A000-memory.dmp

Filesize
40KB

Download
memory/3360-92-0x000001DD50E30000-0x000001DD50E92000-memory.dmp

Filesize
392KB

Download
memory/3360-93-0x000001DD50E90000-0x000001DD50EB2000-memory.dmp

Filesize
136KB

Download
memory/5000-1-0x00000000026E0000-0x00000000027E0000-memory.dmp

Filesize
1024KB

Download
memory/5000-35-0x0000000000400000-0x0000000002597000-memory.dmp

Filesize
33.6MB

Download
memory/5000-37-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/5000-36-0x00000000042D0000-0x000000000433C000-memory.dmp

Filesize
432KB

Download
memory/5000-15-0x0000000000400000-0x0000000002597000-memory.dmp

Filesize
33.6MB

Download
memory/5000-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/5000-2-0x00000000042D0000-0x000000000433C000-memory.dmp

Filesize
432KB

Download