stealc | b11b35effbc93db28b32a4173aedc698a9c9f154cfc59cbd71e43fe5819840e9

Analysis

max time kernel
128s
max time network
130s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
17/04/2024, 20:45

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General

Target

b11b35effbc93db28b32a4173aedc698a9c9f154cfc59cbd71e43fe5819840e9.exe
Size

448KB
MD5

9e5badc8ed2bec98e77e6033027df2fc
SHA1

0b2dea61727bc6234b068f6e93e630f2ca47dcba
SHA256

b11b35effbc93db28b32a4173aedc698a9c9f154cfc59cbd71e43fe5819840e9
SHA512

3de6b4cce23e0abd1791e053061f5a91374e76773b2b5e02f9eda0c1acabb1f8be4d7daa0aae356f405c1ab52dba602e22b63d0fa33563ab150bfeeef34756d6
SSDEEP

6144:Uh8HJFQ69AO9P34hj0xRvKxeeggn0TKQD3yKI28i79Qhs/7doycrBLf:xpH9AUwaxRiTx093884shoy2BLf

Score

10^/10

stealc zgrat rat stealer

Malware Config

Signatures

Detect ZGRat V1 3 IoCs

resource	yara_rule
behavioral2/memory/4372-67-0x000001DAD6620000-0x000001DAD9F18000-memory.dmp	family_zgrat_v1
behavioral2/memory/4372-69-0x000001DAF4710000-0x000001DAF4820000-memory.dmp	family_zgrat_v1
behavioral2/memory/4372-73-0x000001DAF4510000-0x000001DAF4534000-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
1228	u8.0.exe
2936	u8.1.exe

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
1920	1228	WerFault.exe	82
1324	8	WerFault.exe	79

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	u8.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u8.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u8.1.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4372	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2936	u8.1.exe
2936	u8.1.exe
2936	u8.1.exe
2936	u8.1.exe
2936	u8.1.exe
2936	u8.1.exe
2936	u8.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2936	u8.1.exe
2936	u8.1.exe
2936	u8.1.exe
2936	u8.1.exe
2936	u8.1.exe
2936	u8.1.exe
2936	u8.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 8 wrote to memory of 1228	8	b11b35effbc93db28b32a4173aedc698a9c9f154cfc59cbd71e43fe5819840e9.exe	82
PID 8 wrote to memory of 1228	8	b11b35effbc93db28b32a4173aedc698a9c9f154cfc59cbd71e43fe5819840e9.exe	82
PID 8 wrote to memory of 1228	8	b11b35effbc93db28b32a4173aedc698a9c9f154cfc59cbd71e43fe5819840e9.exe	82
PID 8 wrote to memory of 2936	8	b11b35effbc93db28b32a4173aedc698a9c9f154cfc59cbd71e43fe5819840e9.exe	88
PID 8 wrote to memory of 2936	8	b11b35effbc93db28b32a4173aedc698a9c9f154cfc59cbd71e43fe5819840e9.exe	88
PID 8 wrote to memory of 2936	8	b11b35effbc93db28b32a4173aedc698a9c9f154cfc59cbd71e43fe5819840e9.exe	88
PID 2936 wrote to memory of 4372	2936	u8.1.exe	92
PID 2936 wrote to memory of 4372	2936	u8.1.exe	92

C:\Users\Admin\AppData\Local\Temp\b11b35effbc93db28b32a4173aedc698a9c9f154cfc59cbd71e43fe5819840e9.exe
"C:\Users\Admin\AppData\Local\Temp\b11b35effbc93db28b32a4173aedc698a9c9f154cfc59cbd71e43fe5819840e9.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:8
- C:\Users\Admin\AppData\Local\Temp\u8.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u8.0.exe"
  2⤵
  - Executes dropped EXE
  PID:1228
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1228 -s 1244
    3⤵
    - Program crash
    PID:1920
- C:\Users\Admin\AppData\Local\Temp\u8.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u8.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2936
- - 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:4372
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 8 -s 1528
  2⤵
  - Program crash
  PID:1324

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1228 -ip 1228
1⤵
PID:3252

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 8 -ip 8
1⤵
PID:3420

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\iolo\dm\ioloDMLog.txt

Filesize
3KB

MD5
0a405e39c504a2a0b2f83073f4825c0a

SHA1
9e321530e3b78ba842a7d877c85077c47a6c7a55

SHA256
f2c8960a74a565a3e13af012ddbf8ea442186679c747c2bd623b8caa8a1877cd

SHA512
eb8e3a3a6b29a32e6a7b3c7f5e7de76c89fa4806b3907fb4f4067e2d9af92b35bed4578c5c7c35762afb722830aab4904c50e6f856b29648ef6644e7a71c2441

Download Submit
C:\Users\Admin\AppData\Local\Temp\u8.0.exe

Filesize
306KB

MD5
942f4c9696a776e6982bee3434d31345

SHA1
06ec5f2a44506b3bb4749cbeea3496647379306f

SHA256
1c610b04cd3adc13e35f85762a1167cd99b5a3072e6f6b0c823758da3847b357

SHA512
a213d68103ffb223705676329a6cf29ef3a0fae253304f67f74d58a8ae47d6659961b3a23ca50c8221abd9241e02d56f6f6d3aa23a1942af84e2d7bb7c2ed51b

Download Submit
C:\Users\Admin\AppData\Local\Temp\u8.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/8-2-0x0000000004BA0000-0x0000000004C0C000-memory.dmp

Filesize
432KB

Download
memory/8-3-0x0000000000400000-0x0000000002D4E000-memory.dmp

Filesize
41.3MB

Download
memory/8-33-0x0000000004BA0000-0x0000000004C0C000-memory.dmp

Filesize
432KB

Download
memory/8-1-0x0000000002F70000-0x0000000003070000-memory.dmp

Filesize
1024KB

Download
memory/8-32-0x0000000000400000-0x0000000002D4E000-memory.dmp

Filesize
41.3MB

Download
memory/1228-15-0x0000000004A30000-0x0000000004A57000-memory.dmp

Filesize
156KB

Download
memory/1228-16-0x0000000000400000-0x0000000002D2B000-memory.dmp

Filesize
41.2MB

Download
memory/1228-14-0x0000000000400000-0x0000000002D2B000-memory.dmp

Filesize
41.2MB

Download
memory/1228-13-0x0000000002E80000-0x0000000002F80000-memory.dmp

Filesize
1024KB

Download
memory/2936-27-0x0000000002760000-0x0000000002761000-memory.dmp

Filesize
4KB

Download
memory/2936-53-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2936-65-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4372-78-0x000001DAF4AA0000-0x000001DAF4B02000-memory.dmp

Filesize
392KB

Download
memory/4372-88-0x000001DAF9610000-0x000001DAF9618000-memory.dmp

Filesize
32KB

Download
memory/4372-68-0x000001DAF4700000-0x000001DAF4710000-memory.dmp

Filesize
64KB

Download
memory/4372-71-0x000001DADBD30000-0x000001DADBD3C000-memory.dmp

Filesize
48KB

Download
memory/4372-70-0x000001DADA400000-0x000001DADA410000-memory.dmp

Filesize
64KB

Download
memory/4372-72-0x000001DADBD20000-0x000001DADBD34000-memory.dmp

Filesize
80KB

Download
memory/4372-69-0x000001DAF4710000-0x000001DAF4820000-memory.dmp

Filesize
1.1MB

Download
memory/4372-73-0x000001DAF4510000-0x000001DAF4534000-memory.dmp

Filesize
144KB

Download
memory/4372-79-0x000001DAF4B80000-0x000001DAF4BF6000-memory.dmp

Filesize
472KB

Download
memory/4372-66-0x00007FFE4DC70000-0x00007FFE4E732000-memory.dmp

Filesize
10.8MB

Download
memory/4372-77-0x000001DAF4A20000-0x000001DAF4A9A000-memory.dmp

Filesize
488KB

Download
memory/4372-80-0x000001DADBD00000-0x000001DADBD0A000-memory.dmp

Filesize
40KB

Download
memory/4372-76-0x000001DAF4970000-0x000001DAF4A22000-memory.dmp

Filesize
712KB

Download
memory/4372-75-0x000001DAF45B0000-0x000001DAF45DA000-memory.dmp

Filesize
168KB

Download
memory/4372-74-0x000001DAF4590000-0x000001DAF459A000-memory.dmp

Filesize
40KB

Download
memory/4372-84-0x000001DAF4C00000-0x000001DAF4F00000-memory.dmp

Filesize
3.0MB

Download
memory/4372-86-0x000001DAF4700000-0x000001DAF4710000-memory.dmp

Filesize
64KB

Download
memory/4372-67-0x000001DAD6620000-0x000001DAD9F18000-memory.dmp

Filesize
57.0MB

Download
memory/4372-89-0x000001DAF8F50000-0x000001DAF8F88000-memory.dmp

Filesize
224KB

Download
memory/4372-90-0x000001DAF8F20000-0x000001DAF8F2E000-memory.dmp

Filesize
56KB

Download
memory/4372-87-0x000001DAF4700000-0x000001DAF4710000-memory.dmp

Filesize
64KB

Download
memory/4372-92-0x000001DAF9630000-0x000001DAF9652000-memory.dmp

Filesize
136KB

Download
memory/4372-91-0x000001DAF98B0000-0x000001DAF98BA000-memory.dmp

Filesize
40KB

Download
memory/4372-93-0x000001DAF9DF0000-0x000001DAFA318000-memory.dmp

Filesize
5.2MB

Download
memory/4372-98-0x000001DAF9650000-0x000001DAF965C000-memory.dmp

Filesize
48KB

Download
memory/4372-96-0x000001DAF4700000-0x000001DAF4710000-memory.dmp

Filesize
64KB

Download
memory/4372-97-0x000001DAF96A0000-0x000001DAF96F0000-memory.dmp

Filesize
320KB

Download
memory/4372-99-0x000001DAF96F0000-0x000001DAF9712000-memory.dmp

Filesize
136KB

Download
memory/4372-100-0x000001DAF9720000-0x000001DAF973E000-memory.dmp

Filesize
120KB

Download
memory/4372-102-0x00007FFE4DC70000-0x00007FFE4E732000-memory.dmp

Filesize
10.8MB

Download
memory/4372-103-0x000001DAF4700000-0x000001DAF4710000-memory.dmp

Filesize
64KB

Download
memory/4372-104-0x000001DAF4700000-0x000001DAF4710000-memory.dmp

Filesize
64KB

Download
memory/4372-105-0x000001DAF4700000-0x000001DAF4710000-memory.dmp

Filesize
64KB

Download