stealc | 5c49c56c9e581f0b79d074e6560e42962d63ed40310547a5e4d36949b62cd641

Analysis

max time kernel
137s
max time network
136s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
09-05-2024 16:43

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General

Target

5c49c56c9e581f0b79d074e6560e42962d63ed40310547a5e4d36949b62cd641.exe
Size

384KB
MD5

1a110e8b971a75943f419d57a3dadb10
SHA1

8f1bef0d49802b01c99bd79a3c4bf45cac4070c2
SHA256

5c49c56c9e581f0b79d074e6560e42962d63ed40310547a5e4d36949b62cd641
SHA512

3b03875fac78ccf03bf6fe7f3042ebae096c46b9e38a66a5a52fa2cddef3ab0b23bc932a023caa64850c87cf7cec04c8a6dcf5ef831304edb0bc12465e1f34f3
SSDEEP

6144:CvNcF7Kk1SAa5i2mfLPrzOMWRTco+7ASGdHhyUZwS1:CvNo+nAa5gnXo+c8aT1

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/4788-66-0x000001C0F2630000-0x000001C0F5E64000-memory.dmp	family_zgrat_v1
behavioral2/memory/4788-67-0x000001C0F86A0000-0x000001C0F87AA000-memory.dmp	family_zgrat_v1
behavioral2/memory/4788-71-0x000001C0F85C0000-0x000001C0F85E4000-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
2928	u17k.0.exe
4972	u17k.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
2844	1568	WerFault.exe	77
2580	2928	WerFault.exe	78

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 queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u17k.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u17k.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u17k.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	u17k.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u17k.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2928	u17k.0.exe
2928	u17k.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4788	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
4972	u17k.1.exe
4972	u17k.1.exe
4972	u17k.1.exe
4972	u17k.1.exe
4972	u17k.1.exe
4972	u17k.1.exe
4972	u17k.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
4972	u17k.1.exe
4972	u17k.1.exe
4972	u17k.1.exe
4972	u17k.1.exe
4972	u17k.1.exe
4972	u17k.1.exe
4972	u17k.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1568 wrote to memory of 2928	1568	5c49c56c9e581f0b79d074e6560e42962d63ed40310547a5e4d36949b62cd641.exe	78
PID 1568 wrote to memory of 2928	1568	5c49c56c9e581f0b79d074e6560e42962d63ed40310547a5e4d36949b62cd641.exe	78
PID 1568 wrote to memory of 2928	1568	5c49c56c9e581f0b79d074e6560e42962d63ed40310547a5e4d36949b62cd641.exe	78
PID 1568 wrote to memory of 4972	1568	5c49c56c9e581f0b79d074e6560e42962d63ed40310547a5e4d36949b62cd641.exe	81
PID 1568 wrote to memory of 4972	1568	5c49c56c9e581f0b79d074e6560e42962d63ed40310547a5e4d36949b62cd641.exe	81
PID 1568 wrote to memory of 4972	1568	5c49c56c9e581f0b79d074e6560e42962d63ed40310547a5e4d36949b62cd641.exe	81
PID 4972 wrote to memory of 4788	4972	u17k.1.exe	86
PID 4972 wrote to memory of 4788	4972	u17k.1.exe	86

C:\Users\Admin\AppData\Local\Temp\5c49c56c9e581f0b79d074e6560e42962d63ed40310547a5e4d36949b62cd641.exe
"C:\Users\Admin\AppData\Local\Temp\5c49c56c9e581f0b79d074e6560e42962d63ed40310547a5e4d36949b62cd641.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1568
- C:\Users\Admin\AppData\Local\Temp\u17k.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u17k.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2928
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2928 -s 1176
    3⤵
    - Program crash
    PID:2580
- C:\Users\Admin\AppData\Local\Temp\u17k.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u17k.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4972
- - 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:4788
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1568 -s 1164
  2⤵
  - Program crash
  PID:2844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1568 -ip 1568
1⤵
PID:712

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 2928 -ip 2928
1⤵
PID:1920

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\iolo\dm\ioloDMLog.txt

Filesize
3KB

MD5
4eafc6d1f661f07d89218518e7cbd13b

SHA1
db17cf05fa3497bda9d705ab88aa0f1063a49bea

SHA256
38122fb27f66c41b4d42f383e78ea1f20bc6ccee314a39a5404730cb9e92726f

SHA512
b8448876ddb20146e7bf706653353eed9743029e98986fc3f292c008582817ccbaeffca191e41996ddb83fd8b196432b703d7659b945e208a43e8a60b580ec25

Download Submit
C:\Users\Admin\AppData\Local\Temp\u17k.0.exe

Filesize
217KB

MD5
1485fe25a6d2bc50d097656c434822f1

SHA1
b8a4f204a92bad32df0e6af82a4ae04d71910ba9

SHA256
044d3469fd7a09f42ba4d342604e002f0ba770528747ba6d3cb7c4b77a975be6

SHA512
18346906dd80342281579602860c514f8e535bf25b3a0f1abe56f08aab52f203323b8d279e8df7c3723acf989aa0d438866675c22095386f8632a543b5dceaf0

Download Submit
C:\Users\Admin\AppData\Local\Temp\u17k.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1568-2-0x0000000004890000-0x00000000048FC000-memory.dmp

Filesize
432KB

Download
memory/1568-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/1568-16-0x0000000000400000-0x0000000002B1E000-memory.dmp

Filesize
39.1MB

Download
memory/1568-36-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/1568-35-0x0000000000400000-0x0000000002B1E000-memory.dmp

Filesize
39.1MB

Download
memory/1568-1-0x0000000002C90000-0x0000000002D90000-memory.dmp

Filesize
1024KB

Download
memory/2928-105-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/2928-62-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/2928-103-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/2928-101-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/2928-99-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/2928-95-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/4788-74-0x000001C0F8620000-0x000001C0F864A000-memory.dmp

Filesize
168KB

Download
memory/4788-86-0x000001C0FCDB0000-0x000001C0FCDB8000-memory.dmp

Filesize
32KB

Download
memory/4788-71-0x000001C0F85C0000-0x000001C0F85E4000-memory.dmp

Filesize
144KB

Download
memory/4788-72-0x000001C0F85F0000-0x000001C0F85FA000-memory.dmp

Filesize
40KB

Download
memory/4788-73-0x000001C0F8900000-0x000001C0F89B2000-memory.dmp

Filesize
712KB

Download
memory/4788-68-0x000001C0F62E0000-0x000001C0F62F0000-memory.dmp

Filesize
64KB

Download
memory/4788-75-0x000001C0F8A00000-0x000001C0F8A50000-memory.dmp

Filesize
320KB

Download
memory/4788-76-0x000001C0F89B0000-0x000001C0F89D2000-memory.dmp

Filesize
136KB

Download
memory/4788-77-0x000001C0F6340000-0x000001C0F634A000-memory.dmp

Filesize
40KB

Download
memory/4788-81-0x000001C0F8A50000-0x000001C0F8D50000-memory.dmp

Filesize
3.0MB

Download
memory/4788-83-0x000001C0FCE40000-0x000001C0FCE48000-memory.dmp

Filesize
32KB

Download
memory/4788-84-0x000001C0FCDC0000-0x000001C0FCDF8000-memory.dmp

Filesize
224KB

Download
memory/4788-85-0x000001C0FCD90000-0x000001C0FCD9E000-memory.dmp

Filesize
56KB

Download
memory/4788-70-0x000001C0F6360000-0x000001C0F6374000-memory.dmp

Filesize
80KB

Download
memory/4788-87-0x000001C0FD730000-0x000001C0FD73A000-memory.dmp

Filesize
40KB

Download
memory/4788-88-0x000001C0FD750000-0x000001C0FD7B2000-memory.dmp

Filesize
392KB

Download
memory/4788-89-0x000001C0FD4B0000-0x000001C0FD4D2000-memory.dmp

Filesize
136KB

Download
memory/4788-90-0x000001C0FDCE0000-0x000001C0FE208000-memory.dmp

Filesize
5.2MB

Download
memory/4788-93-0x000001C0FD4D0000-0x000001C0FD4DC000-memory.dmp

Filesize
48KB

Download
memory/4788-94-0x000001C0FD5B0000-0x000001C0FD626000-memory.dmp

Filesize
472KB

Download
memory/4788-69-0x000001C0F8450000-0x000001C0F845C000-memory.dmp

Filesize
48KB

Download
memory/4788-96-0x000001C0FD510000-0x000001C0FD52E000-memory.dmp

Filesize
120KB

Download
memory/4788-67-0x000001C0F86A0000-0x000001C0F87AA000-memory.dmp

Filesize
1.0MB

Download
memory/4788-66-0x000001C0F2630000-0x000001C0F5E64000-memory.dmp

Filesize
56.2MB

Download
memory/4972-65-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4972-52-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download