stealc | 70bf3086062e0c9a5bf377f265b84508f0fc9d649dd5bd051e3dc03bb965e156

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
08-05-2024 10:10

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General

Target

70bf3086062e0c9a5bf377f265b84508f0fc9d649dd5bd051e3dc03bb965e156.exe
Size

368KB
MD5

ee4723d7425cae812e58ae3c6552fc56
SHA1

14cd38e50cbf305e57461a7ddbeea622f7a075df
SHA256

70bf3086062e0c9a5bf377f265b84508f0fc9d649dd5bd051e3dc03bb965e156
SHA512

485f56b4362f5693fc9fb47340dfc9063994d630fc1d5fe90322409a17328a76df72ba8dbd412afac69c6d6bf6052b390c42181543726d488c0fa93f7a0a70c2
SSDEEP

6144:FelyjzIpb2xE5BNqj+DYvjZask87WlizIwYYozY/TZ4tjM:YlyjzIpbyE6yDYFask87Oi9Z4tjM

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/1436-65-0x000002447D6F0000-0x0000024480F24000-memory.dmp	family_zgrat_v1
behavioral2/memory/1436-66-0x000002441AA20000-0x000002441AB2A000-memory.dmp	family_zgrat_v1
behavioral2/memory/1436-70-0x00000244005C0000-0x00000244005E4000-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
2300	u3l8.0.exe
2284	u3l8.1.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
4736	4652	WerFault.exe	79
1552	2300	WerFault.exe	82

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	u3l8.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3l8.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3l8.1.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	u3l8.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3l8.0.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2300	u3l8.0.exe
2300	u3l8.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2284	u3l8.1.exe
2284	u3l8.1.exe
2284	u3l8.1.exe
2284	u3l8.1.exe
2284	u3l8.1.exe
2284	u3l8.1.exe
2284	u3l8.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2284	u3l8.1.exe
2284	u3l8.1.exe
2284	u3l8.1.exe
2284	u3l8.1.exe
2284	u3l8.1.exe
2284	u3l8.1.exe
2284	u3l8.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4652 wrote to memory of 2300	4652	70bf3086062e0c9a5bf377f265b84508f0fc9d649dd5bd051e3dc03bb965e156.exe	82
PID 4652 wrote to memory of 2300	4652	70bf3086062e0c9a5bf377f265b84508f0fc9d649dd5bd051e3dc03bb965e156.exe	82
PID 4652 wrote to memory of 2300	4652	70bf3086062e0c9a5bf377f265b84508f0fc9d649dd5bd051e3dc03bb965e156.exe	82
PID 4652 wrote to memory of 2284	4652	70bf3086062e0c9a5bf377f265b84508f0fc9d649dd5bd051e3dc03bb965e156.exe	85
PID 4652 wrote to memory of 2284	4652	70bf3086062e0c9a5bf377f265b84508f0fc9d649dd5bd051e3dc03bb965e156.exe	85
PID 4652 wrote to memory of 2284	4652	70bf3086062e0c9a5bf377f265b84508f0fc9d649dd5bd051e3dc03bb965e156.exe	85
PID 2284 wrote to memory of 1436	2284	u3l8.1.exe	90
PID 2284 wrote to memory of 1436	2284	u3l8.1.exe	90

C:\Users\Admin\AppData\Local\Temp\70bf3086062e0c9a5bf377f265b84508f0fc9d649dd5bd051e3dc03bb965e156.exe
"C:\Users\Admin\AppData\Local\Temp\70bf3086062e0c9a5bf377f265b84508f0fc9d649dd5bd051e3dc03bb965e156.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4652
- C:\Users\Admin\AppData\Local\Temp\u3l8.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3l8.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2300
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2300 -s 1376
    3⤵
    - Program crash
    PID:1552
- C:\Users\Admin\AppData\Local\Temp\u3l8.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3l8.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2284
- - 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:1436
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4652 -s 708
  2⤵
  - Program crash
  PID:4736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4652 -ip 4652
1⤵
PID:2460

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 2300 -ip 2300
1⤵
PID:3684

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
4fe32387d02605a7928338b6ad6ef85b

SHA1
b9b4f94bea9f5eaae50d2a26b4ab8147c26d1c2d

SHA256
b7c55359012af40a360045a9ee3d3130c98dfddbd9bde5f47ee5b8b737ab45dd

SHA512
333d0c791d73647e67581b887f983585a4a922fe6262592b7e2a3db3d4dcc484f76036d2d8644efc2645c06a56fa501c4fa4fa3a370c409f4278ddb2ff4c998f

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3l8.0.exe

Filesize
226KB

MD5
8cb22c6d983d9e4c3d48df67207e888f

SHA1
a2ddf20c0854f12fa40802d9b9df5fb6ee287089

SHA256
feb7155e62062e6f3f7ab92c1702b36315a1aebad706741d939bde25de43002d

SHA512
5ae36d56e576ccdbefc2a7ab151eb72f5e6aaf0b6e0ae72eb58e9073e2a05cc485046865e1a9764acd2cc18ba69f844cb27b3deeba8a5baac02a8a13a7ba20ea

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3l8.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1436-86-0x000002441F110000-0x000002441F11A000-memory.dmp

Filesize
40KB

Download
memory/1436-94-0x0000024481020000-0x000002448103E000-memory.dmp

Filesize
120KB

Download
memory/1436-73-0x000002441AD00000-0x000002441ADB2000-memory.dmp

Filesize
712KB

Download
memory/1436-98-0x000002441A860000-0x000002441AA13000-memory.dmp

Filesize
1.7MB

Download
memory/1436-74-0x0000024480F80000-0x0000024480FD0000-memory.dmp

Filesize
320KB

Download
memory/1436-93-0x0000024481100000-0x0000024481176000-memory.dmp

Filesize
472KB

Download
memory/1436-92-0x000002441F140000-0x000002441F14C000-memory.dmp

Filesize
48KB

Download
memory/1436-89-0x000002441FF70000-0x0000024420498000-memory.dmp

Filesize
5.2MB

Download
memory/1436-88-0x000002441F120000-0x000002441F142000-memory.dmp

Filesize
136KB

Download
memory/1436-87-0x000002441F9E0000-0x000002441FA42000-memory.dmp

Filesize
392KB

Download
memory/1436-65-0x000002447D6F0000-0x0000024480F24000-memory.dmp

Filesize
56.2MB

Download
memory/1436-66-0x000002441AA20000-0x000002441AB2A000-memory.dmp

Filesize
1.0MB

Download
memory/1436-68-0x0000024400560000-0x000002440056C000-memory.dmp

Filesize
48KB

Download
memory/1436-75-0x0000024480FD0000-0x0000024480FF2000-memory.dmp

Filesize
136KB

Download
memory/1436-69-0x0000024400550000-0x0000024400564000-memory.dmp

Filesize
80KB

Download
memory/1436-70-0x00000244005C0000-0x00000244005E4000-memory.dmp

Filesize
144KB

Download
memory/1436-71-0x00000244005F0000-0x00000244005FA000-memory.dmp

Filesize
40KB

Download
memory/1436-72-0x0000024401ED0000-0x0000024401EFA000-memory.dmp

Filesize
168KB

Download
memory/1436-85-0x0000024480F60000-0x0000024480F68000-memory.dmp

Filesize
32KB

Download
memory/1436-84-0x0000024480F50000-0x0000024480F5E000-memory.dmp

Filesize
56KB

Download
memory/1436-67-0x0000024400530000-0x0000024400540000-memory.dmp

Filesize
64KB

Download
memory/1436-76-0x0000024400460000-0x000002440046A000-memory.dmp

Filesize
40KB

Download
memory/1436-80-0x000002441ADB0000-0x000002441B0B0000-memory.dmp

Filesize
3.0MB

Download
memory/1436-82-0x0000024480F40000-0x0000024480F48000-memory.dmp

Filesize
32KB

Download
memory/1436-83-0x0000024481040000-0x0000024481078000-memory.dmp

Filesize
224KB

Download
memory/2284-64-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2284-52-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2300-97-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/2300-13-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/2300-107-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/2300-15-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/2300-103-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/2300-14-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/2300-111-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/4652-1-0x0000000001C50000-0x0000000001D50000-memory.dmp

Filesize
1024KB

Download
memory/4652-2-0x0000000003770000-0x00000000037DC000-memory.dmp

Filesize
432KB

Download
memory/4652-31-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4652-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4652-30-0x0000000000400000-0x0000000001A26000-memory.dmp

Filesize
22.1MB

Download