stealc | d719fb243a6d2ad33a76aa78ee66f4763a36c78a2373a01de223fb5c27b722da

Analysis

max time kernel
146s
max time network
155s
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 19:41

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General

Target

d719fb243a6d2ad33a76aa78ee66f4763a36c78a2373a01de223fb5c27b722da.exe
Size

384KB
MD5

f969256486cae8c6c357924481ec86ee
SHA1

95f91c8a6539700b4dd6077ba3a778c13bc72d4d
SHA256

d719fb243a6d2ad33a76aa78ee66f4763a36c78a2373a01de223fb5c27b722da
SHA512

106959ab072744ae5ce79cbc627040dbd32bb416407ca7d1f848ae49dbb609f900c0f34696fc5e30c5418d889b5c07b35d5a0f9b4f1be1e662621ba2c4491e16
SSDEEP

6144:2nNm4Za4Cv1GOuLzYI0dBXV9TCS/lMEGFZCTiQJ0s4:2nNNZg1GOuL5SV9TNyEGFTQP4

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/1396-70-0x0000023C6F0D0000-0x0000023C72904000-memory.dmp	family_zgrat_v1
behavioral2/memory/1396-71-0x0000023C75060000-0x0000023C7516A000-memory.dmp	family_zgrat_v1
behavioral2/memory/1396-75-0x0000023C75170000-0x0000023C75194000-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
3816	u3ms.0.exe
1624	u3ms.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
2336	4708	WerFault.exe	78
2896	3816	WerFault.exe	86

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	u3ms.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3ms.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3ms.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	u3ms.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3ms.0.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3816	u3ms.0.exe
3816	u3ms.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
1624	u3ms.1.exe
1624	u3ms.1.exe
1624	u3ms.1.exe
1624	u3ms.1.exe
1624	u3ms.1.exe
1624	u3ms.1.exe
1624	u3ms.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
1624	u3ms.1.exe
1624	u3ms.1.exe
1624	u3ms.1.exe
1624	u3ms.1.exe
1624	u3ms.1.exe
1624	u3ms.1.exe
1624	u3ms.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4708 wrote to memory of 3816	4708	d719fb243a6d2ad33a76aa78ee66f4763a36c78a2373a01de223fb5c27b722da.exe	86
PID 4708 wrote to memory of 3816	4708	d719fb243a6d2ad33a76aa78ee66f4763a36c78a2373a01de223fb5c27b722da.exe	86
PID 4708 wrote to memory of 3816	4708	d719fb243a6d2ad33a76aa78ee66f4763a36c78a2373a01de223fb5c27b722da.exe	86
PID 4708 wrote to memory of 1624	4708	d719fb243a6d2ad33a76aa78ee66f4763a36c78a2373a01de223fb5c27b722da.exe	89
PID 4708 wrote to memory of 1624	4708	d719fb243a6d2ad33a76aa78ee66f4763a36c78a2373a01de223fb5c27b722da.exe	89
PID 4708 wrote to memory of 1624	4708	d719fb243a6d2ad33a76aa78ee66f4763a36c78a2373a01de223fb5c27b722da.exe	89
PID 1624 wrote to memory of 1396	1624	u3ms.1.exe	95
PID 1624 wrote to memory of 1396	1624	u3ms.1.exe	95

C:\Users\Admin\AppData\Local\Temp\d719fb243a6d2ad33a76aa78ee66f4763a36c78a2373a01de223fb5c27b722da.exe
"C:\Users\Admin\AppData\Local\Temp\d719fb243a6d2ad33a76aa78ee66f4763a36c78a2373a01de223fb5c27b722da.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4708
- C:\Users\Admin\AppData\Local\Temp\u3ms.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3ms.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3816
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3816 -s 1424
    3⤵
    - Program crash
    PID:2896
- C:\Users\Admin\AppData\Local\Temp\u3ms.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3ms.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:1624
- - 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:1396
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4708 -s 1524
  2⤵
  - Program crash
  PID:2336

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4708 -ip 4708
1⤵
PID:1312

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3816 -ip 3816
1⤵
PID:4000

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\u3ms.0.exe

Filesize
206KB

MD5
0917be53327ea132956255dcab650a82

SHA1
b60818917f645a8a9af3b530e3ae37c1f002be2f

SHA256
211c34660898480e0777c6ef6f61bf2111f6550e00b40cab859543d567dc455a

SHA512
a72acc24ba813d983bbf2ecab7929d0aab4e25637ae43e85b973a5105429bd15c061415fd855737620caaf81b456b2d6ba57f85566245efbe5f8b5db5560932a

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3ms.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1396-92-0x0000023C79F60000-0x0000023C79FC2000-memory.dmp

Filesize
392KB

Download
memory/1396-70-0x0000023C6F0D0000-0x0000023C72904000-memory.dmp

Filesize
56.2MB

Download
memory/1396-77-0x0000023C75330000-0x0000023C753E2000-memory.dmp

Filesize
712KB

Download
memory/1396-100-0x0000023C7A010000-0x0000023C7A02E000-memory.dmp

Filesize
120KB

Download
memory/1396-78-0x0000023C753E0000-0x0000023C7540A000-memory.dmp

Filesize
168KB

Download
memory/1396-97-0x0000023C79F50000-0x0000023C79F5C000-memory.dmp

Filesize
48KB

Download
memory/1396-94-0x0000023C7A710000-0x0000023C7AC38000-memory.dmp

Filesize
5.2MB

Download
memory/1396-93-0x0000023C79FC0000-0x0000023C79FE2000-memory.dmp

Filesize
136KB

Download
memory/1396-91-0x0000023C7A1D0000-0x0000023C7A1DA000-memory.dmp

Filesize
40KB

Download
memory/1396-90-0x0000023C79850000-0x0000023C79858000-memory.dmp

Filesize
32KB

Download
memory/1396-89-0x0000023C79830000-0x0000023C7983E000-memory.dmp

Filesize
56KB

Download
memory/1396-87-0x0000023C798E0000-0x0000023C798E8000-memory.dmp

Filesize
32KB

Download
memory/1396-73-0x0000023C74720000-0x0000023C7472C000-memory.dmp

Filesize
48KB

Download
memory/1396-79-0x0000023C75460000-0x0000023C754B0000-memory.dmp

Filesize
320KB

Download
memory/1396-71-0x0000023C75060000-0x0000023C7516A000-memory.dmp

Filesize
1.0MB

Download
memory/1396-75-0x0000023C75170000-0x0000023C75194000-memory.dmp

Filesize
144KB

Download
memory/1396-74-0x0000023C74710000-0x0000023C74724000-memory.dmp

Filesize
80KB

Download
memory/1396-76-0x0000023C75300000-0x0000023C7530A000-memory.dmp

Filesize
40KB

Download
memory/1396-88-0x0000023C79860000-0x0000023C79898000-memory.dmp

Filesize
224KB

Download
memory/1396-98-0x0000023C7A0B0000-0x0000023C7A126000-memory.dmp

Filesize
472KB

Download
memory/1396-72-0x0000023C72E40000-0x0000023C72E50000-memory.dmp

Filesize
64KB

Download
memory/1396-80-0x0000023C754B0000-0x0000023C754D2000-memory.dmp

Filesize
136KB

Download
memory/1396-81-0x0000023C72E20000-0x0000023C72E2A000-memory.dmp

Filesize
40KB

Download
memory/1396-85-0x0000023C754E0000-0x0000023C757E0000-memory.dmp

Filesize
3.0MB

Download
memory/1624-69-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/1624-66-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3816-19-0x0000000000400000-0x0000000002AF1000-memory.dmp

Filesize
38.9MB

Download
memory/3816-108-0x0000000000400000-0x0000000002AF1000-memory.dmp

Filesize
38.9MB

Download
memory/3816-104-0x0000000000400000-0x0000000002AF1000-memory.dmp

Filesize
38.9MB

Download
memory/3816-102-0x0000000000400000-0x0000000002AF1000-memory.dmp

Filesize
38.9MB

Download
memory/3816-18-0x0000000000400000-0x0000000002AF1000-memory.dmp

Filesize
38.9MB

Download
memory/3816-106-0x0000000000400000-0x0000000002AF1000-memory.dmp

Filesize
38.9MB

Download
memory/4708-3-0x0000000002FE0000-0x000000000304C000-memory.dmp

Filesize
432KB

Download
memory/4708-40-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4708-17-0x0000000000400000-0x0000000002B1E000-memory.dmp

Filesize
39.1MB

Download
memory/4708-39-0x0000000000400000-0x0000000002B1E000-memory.dmp

Filesize
39.1MB

Download
memory/4708-4-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4708-2-0x0000000002DE0000-0x0000000002EE0000-memory.dmp

Filesize
1024KB

Download
memory/4708-1-0x0000000000400000-0x0000000002B1E000-memory.dmp

Filesize
39.1MB

Download