stealc | 4bcdf33d99a5429e0b6e6f754ef11010a1df4d3925c2df8a28997c2b9069db80

General

Target

4bcdf33d99a5429e0b6e6f754ef11010a1df4d3925c2df8a28997c2b9069db80.exe
Size

383KB
MD5

3d7127a10409c3f1b775c80238bfcc89
SHA1

143720d2d3e591f0e6877b410d9c8e667b080ee0
SHA256

4bcdf33d99a5429e0b6e6f754ef11010a1df4d3925c2df8a28997c2b9069db80
SHA512

83c13ef27883f38f8294235bfc7655d4c19b803a7b65f725f4fcd21704ec59b1522e6a0fe67571b354cfa32b031719ae633a63bfd2e90eb4c84dbdf0f33b30da
SSDEEP

6144:0wUnEcZwBa7zsNtiNSm4G6GL8yLPRlbxwHzT9L2EJ2iA179uVWQj9eJK2q:tkEMKYd88wP3JAhIjUJK2q

Score

10^/10

stealc zgrat discovery rat spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.150

Attributes

url_path
/c698e1bc8a2f5e6d.php

Signatures

Detect ZGRat V1 3 IoCs

resource	yara_rule
behavioral2/memory/3460-80-0x000002366BEE0000-0x000002366F714000-memory.dmp	family_zgrat_v1
behavioral2/memory/3460-81-0x0000023671EA0000-0x0000023671FAA000-memory.dmp	family_zgrat_v1
behavioral2/memory/3460-85-0x0000023671D70000-0x0000023671D94000-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
4800	u3ck.0.exe
224	u3ck.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
4716	4340	WerFault.exe	76
5024	4800	WerFault.exe	77

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3ck.0.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	u3ck.0.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4116	timeout.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
4800	u3ck.0.exe
4800	u3ck.0.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3460	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
224	u3ck.1.exe
224	u3ck.1.exe
224	u3ck.1.exe
224	u3ck.1.exe
224	u3ck.1.exe
224	u3ck.1.exe
224	u3ck.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
224	u3ck.1.exe
224	u3ck.1.exe
224	u3ck.1.exe
224	u3ck.1.exe
224	u3ck.1.exe
224	u3ck.1.exe
224	u3ck.1.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4340 wrote to memory of 4800	4340	4bcdf33d99a5429e0b6e6f754ef11010a1df4d3925c2df8a28997c2b9069db80.exe	77
PID 4340 wrote to memory of 4800	4340	4bcdf33d99a5429e0b6e6f754ef11010a1df4d3925c2df8a28997c2b9069db80.exe	77
PID 4340 wrote to memory of 4800	4340	4bcdf33d99a5429e0b6e6f754ef11010a1df4d3925c2df8a28997c2b9069db80.exe	77
PID 4340 wrote to memory of 224	4340	4bcdf33d99a5429e0b6e6f754ef11010a1df4d3925c2df8a28997c2b9069db80.exe	80
PID 4340 wrote to memory of 224	4340	4bcdf33d99a5429e0b6e6f754ef11010a1df4d3925c2df8a28997c2b9069db80.exe	80
PID 4340 wrote to memory of 224	4340	4bcdf33d99a5429e0b6e6f754ef11010a1df4d3925c2df8a28997c2b9069db80.exe	80
PID 4800 wrote to memory of 5016	4800	u3ck.0.exe	85
PID 4800 wrote to memory of 5016	4800	u3ck.0.exe	85
PID 4800 wrote to memory of 5016	4800	u3ck.0.exe	85
PID 5016 wrote to memory of 4116	5016	cmd.exe	89
PID 5016 wrote to memory of 4116	5016	cmd.exe	89
PID 5016 wrote to memory of 4116	5016	cmd.exe	89
PID 224 wrote to memory of 3460	224	u3ck.1.exe	90
PID 224 wrote to memory of 3460	224	u3ck.1.exe	90

C:\Users\Admin\AppData\Local\Temp\4bcdf33d99a5429e0b6e6f754ef11010a1df4d3925c2df8a28997c2b9069db80.exe
"C:\Users\Admin\AppData\Local\Temp\4bcdf33d99a5429e0b6e6f754ef11010a1df4d3925c2df8a28997c2b9069db80.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
  - Suspicious use of WriteProcessMemory
  PID:4800
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\u3ck.0.exe" & del "C:\ProgramData\*.dll"" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:5016
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 5
      4⤵
      Delays execution with timeout.exe
      PID:4116
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4800 -s 1488
    3⤵
    - Program crash
    PID:5024
- 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:224
- - 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:3460
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4340 -s 1164
  2⤵
  - Program crash
  PID:4716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4340 -ip 4340
1⤵
PID:2900

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 4800 -ip 4800
1⤵
PID:3872

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
241KB

MD5
e3db79a0448215d54ea4f136c9822163

SHA1
04a87613c74443f0c16b29ebe632535ff9acfb86

SHA256
e21b32533e7bef276e6917f5e4ae6c7eceff24dcd7867b4ab88de41749dc2951

SHA512
91db4c51a35bc14d0237a5df6b9f7e1439396358c5b87eb5db280d02ab5e8de6a656f11e4abc667bdeb66d7d51b913377671d3d51471c502bc3b9ac918905b4f

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

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/224-79-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/224-67-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3460-99-0x0000023676640000-0x000002367664E000-memory.dmp

Filesize
56KB

Download
memory/3460-88-0x0000023672180000-0x0000023672232000-memory.dmp

Filesize
712KB

Download
memory/3460-109-0x0000023676DD0000-0x0000023676DEE000-memory.dmp

Filesize
120KB

Download
memory/3460-108-0x0000023676E70000-0x0000023676EE6000-memory.dmp

Filesize
472KB

Download
memory/3460-107-0x0000023676D90000-0x0000023676D9C000-memory.dmp

Filesize
48KB

Download
memory/3460-104-0x0000023677590000-0x0000023677AB8000-memory.dmp

Filesize
5.2MB

Download
memory/3460-103-0x0000023676D70000-0x0000023676D92000-memory.dmp

Filesize
136KB

Download
memory/3460-101-0x0000023676D50000-0x0000023676D5A000-memory.dmp

Filesize
40KB

Download
memory/3460-102-0x0000023677000000-0x0000023677062000-memory.dmp

Filesize
392KB

Download
memory/3460-80-0x000002366BEE0000-0x000002366F714000-memory.dmp

Filesize
56.2MB

Download
memory/3460-81-0x0000023671EA0000-0x0000023671FAA000-memory.dmp

Filesize
1.0MB

Download
memory/3460-82-0x0000023671CE0000-0x0000023671CF0000-memory.dmp

Filesize
64KB

Download
memory/3460-83-0x0000023671D00000-0x0000023671D0C000-memory.dmp

Filesize
48KB

Download
memory/3460-84-0x0000023671CF0000-0x0000023671D04000-memory.dmp

Filesize
80KB

Download
memory/3460-85-0x0000023671D70000-0x0000023671D94000-memory.dmp

Filesize
144KB

Download
memory/3460-87-0x0000023672150000-0x000002367217A000-memory.dmp

Filesize
168KB

Download
memory/3460-86-0x0000023671FB0000-0x0000023671FBA000-memory.dmp

Filesize
40KB

Download
memory/3460-100-0x0000023676660000-0x0000023676668000-memory.dmp

Filesize
32KB

Download
memory/3460-89-0x0000023672280000-0x00000236722D0000-memory.dmp

Filesize
320KB

Download
memory/3460-90-0x0000023672230000-0x0000023672252000-memory.dmp

Filesize
136KB

Download
memory/3460-91-0x00000236714C0000-0x00000236714CA000-memory.dmp

Filesize
40KB

Download
memory/3460-95-0x00000236722D0000-0x00000236725D0000-memory.dmp

Filesize
3.0MB

Download
memory/3460-97-0x0000023676D30000-0x0000023676D38000-memory.dmp

Filesize
32KB

Download
memory/3460-98-0x0000023676670000-0x00000236766A8000-memory.dmp

Filesize
224KB

Download
memory/4340-1-0x0000000002CE0000-0x0000000002DE0000-memory.dmp

Filesize
1024KB

Download
memory/4340-32-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4340-2-0x0000000004890000-0x00000000048FC000-memory.dmp

Filesize
432KB

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

Filesize
444KB

Download
memory/4340-30-0x0000000000400000-0x0000000002B1D000-memory.dmp

Filesize
39.1MB

Download
memory/4340-31-0x0000000004890000-0x00000000048FC000-memory.dmp

Filesize
432KB

Download
memory/4800-66-0x0000000000400000-0x0000000002AFA000-memory.dmp

Filesize
39.0MB

Download
memory/4800-54-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/4800-37-0x0000000000400000-0x0000000002AFA000-memory.dmp

Filesize
39.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads