stealc | 5b6626d7475ea918ab383b130e556cd0fdc9673845000e4316e94cdc4209da63

Analysis

max time kernel
129s
max time network
133s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
08-05-2024 09:45

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General

Target

5b6626d7475ea918ab383b130e556cd0fdc9673845000e4316e94cdc4209da63.exe
Size

368KB
MD5

b8aed504bddd0561e3d39aa6415a0f33
SHA1

b9bbdaa4a94bc140e94030992a12f879926e6e79
SHA256

5b6626d7475ea918ab383b130e556cd0fdc9673845000e4316e94cdc4209da63
SHA512

ae57aaf0bd154aa2b4c3452b48b0401d16512b6ceac4638bc1677569149977efe1f77125bef7459802e948acd6853f30fe921785fc9af255cf7bb43ed4af7dd0
SSDEEP

6144:mQLsPnj9HcQoscXDIkJUVmPdKTfVvvIFGg1w8c4lZNTpj1:DLsRxoscIeUMVCNX2Vw2lTpj1

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/2148-65-0x00000204B6BA0000-0x00000204BA3D4000-memory.dmp	family_zgrat_v1
behavioral2/memory/2148-67-0x00000204D4BB0000-0x00000204D4CBA000-memory.dmp	family_zgrat_v1
behavioral2/memory/2148-71-0x00000204D4B10000-0x00000204D4B34000-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
3308	u2uo.0.exe
3712	u2uo.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
1188	3696	WerFault.exe	79
1784	3308	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 enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2uo.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2uo.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2uo.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	u2uo.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u2uo.0.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3308	u2uo.0.exe
3308	u2uo.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2148	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
3712	u2uo.1.exe
3712	u2uo.1.exe
3712	u2uo.1.exe
3712	u2uo.1.exe
3712	u2uo.1.exe
3712	u2uo.1.exe
3712	u2uo.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
3712	u2uo.1.exe
3712	u2uo.1.exe
3712	u2uo.1.exe
3712	u2uo.1.exe
3712	u2uo.1.exe
3712	u2uo.1.exe
3712	u2uo.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3696 wrote to memory of 3308	3696	5b6626d7475ea918ab383b130e556cd0fdc9673845000e4316e94cdc4209da63.exe	81
PID 3696 wrote to memory of 3308	3696	5b6626d7475ea918ab383b130e556cd0fdc9673845000e4316e94cdc4209da63.exe	81
PID 3696 wrote to memory of 3308	3696	5b6626d7475ea918ab383b130e556cd0fdc9673845000e4316e94cdc4209da63.exe	81
PID 3696 wrote to memory of 3712	3696	5b6626d7475ea918ab383b130e556cd0fdc9673845000e4316e94cdc4209da63.exe	84
PID 3696 wrote to memory of 3712	3696	5b6626d7475ea918ab383b130e556cd0fdc9673845000e4316e94cdc4209da63.exe	84
PID 3696 wrote to memory of 3712	3696	5b6626d7475ea918ab383b130e556cd0fdc9673845000e4316e94cdc4209da63.exe	84
PID 3712 wrote to memory of 2148	3712	u2uo.1.exe	90
PID 3712 wrote to memory of 2148	3712	u2uo.1.exe	90

C:\Users\Admin\AppData\Local\Temp\5b6626d7475ea918ab383b130e556cd0fdc9673845000e4316e94cdc4209da63.exe
"C:\Users\Admin\AppData\Local\Temp\5b6626d7475ea918ab383b130e556cd0fdc9673845000e4316e94cdc4209da63.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3696
- C:\Users\Admin\AppData\Local\Temp\u2uo.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u2uo.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3308
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3308 -s 792
    3⤵
    - Program crash
    PID:1784
- C:\Users\Admin\AppData\Local\Temp\u2uo.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u2uo.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:3712
- - 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:2148
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3696 -s 1164
  2⤵
  - Program crash
  PID:1188

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3696 -ip 3696
1⤵
PID:3496

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 3308 -ip 3308
1⤵
PID:1316

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\u2uo.0.exe

Filesize
226KB

MD5
ef9806bb54c2f630476b88f703305415

SHA1
753f3ca7aec9bd521e6a5ebcb3367b782f3de810

SHA256
2de2db388c80aeb3ca2fb3d6d63286da28fd0e84abc9965b1e16936bc8109e1e

SHA512
a859a8471141b646876ec61d4b91a67d6c9ccc156d07583199d93b417d8aa3783e11244b5b9af8be1465ef1833746d5861e2036a056301a45e54579bafe3e30a

Download Submit
C:\Users\Admin\AppData\Local\Temp\u2uo.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/2148-87-0x00000204D9CA0000-0x00000204D9CAA000-memory.dmp

Filesize
40KB

Download
memory/2148-77-0x00000204D4940000-0x00000204D494A000-memory.dmp

Filesize
40KB

Download
memory/2148-89-0x00000204D9A20000-0x00000204D9A42000-memory.dmp

Filesize
136KB

Download
memory/2148-88-0x00000204D9CC0000-0x00000204D9D22000-memory.dmp

Filesize
392KB

Download
memory/2148-93-0x00000204D9A40000-0x00000204D9A4C000-memory.dmp

Filesize
48KB

Download
memory/2148-73-0x00000204D4E10000-0x00000204D4E3A000-memory.dmp

Filesize
168KB

Download
memory/2148-86-0x00000204D9330000-0x00000204D9338000-memory.dmp

Filesize
32KB

Download
memory/2148-85-0x00000204D9310000-0x00000204D931E000-memory.dmp

Filesize
56KB

Download
memory/2148-84-0x00000204D9350000-0x00000204D9388000-memory.dmp

Filesize
224KB

Download
memory/2148-95-0x00000204D9A80000-0x00000204D9A9E000-memory.dmp

Filesize
120KB

Download
memory/2148-74-0x00000204D4E40000-0x00000204D4EF2000-memory.dmp

Filesize
712KB

Download
memory/2148-65-0x00000204B6BA0000-0x00000204BA3D4000-memory.dmp

Filesize
56.2MB

Download
memory/2148-67-0x00000204D4BB0000-0x00000204D4CBA000-memory.dmp

Filesize
1.0MB

Download
memory/2148-75-0x00000204D4F40000-0x00000204D4F90000-memory.dmp

Filesize
320KB

Download
memory/2148-68-0x00000204D4970000-0x00000204D4980000-memory.dmp

Filesize
64KB

Download
memory/2148-70-0x00000204D4980000-0x00000204D4994000-memory.dmp

Filesize
80KB

Download
memory/2148-71-0x00000204D4B10000-0x00000204D4B34000-memory.dmp

Filesize
144KB

Download
memory/2148-72-0x00000204D4B40000-0x00000204D4B4A000-memory.dmp

Filesize
40KB

Download
memory/2148-83-0x00000204D8C40000-0x00000204D8C48000-memory.dmp

Filesize
32KB

Download
memory/2148-94-0x00000204D9B20000-0x00000204D9B96000-memory.dmp

Filesize
472KB

Download
memory/2148-69-0x00000204D4AA0000-0x00000204D4AAC000-memory.dmp

Filesize
48KB

Download
memory/2148-76-0x00000204D4EF0000-0x00000204D4F12000-memory.dmp

Filesize
136KB

Download
memory/2148-90-0x00000204DA250000-0x00000204DA778000-memory.dmp

Filesize
5.2MB

Download
memory/2148-81-0x00000204D4F90000-0x00000204D5290000-memory.dmp

Filesize
3.0MB

Download
memory/3308-102-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3308-51-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3308-97-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3308-100-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3308-104-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3308-14-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3308-13-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3696-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/3696-1-0x0000000001CE0000-0x0000000001DE0000-memory.dmp

Filesize
1024KB

Download
memory/3696-29-0x0000000000400000-0x0000000001A26000-memory.dmp

Filesize
22.1MB

Download
memory/3696-30-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/3696-31-0x0000000003780000-0x00000000037EC000-memory.dmp

Filesize
432KB

Download
memory/3696-2-0x0000000003780000-0x00000000037EC000-memory.dmp

Filesize
432KB

Download
memory/3712-64-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3712-52-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download