stealc | 282866097e1dfb5c11e0af461439e44818445255c13563b90f7112068255caba

Analysis

max time kernel
125s
max time network
127s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
08-05-2024 19:18

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General

Target

282866097e1dfb5c11e0af461439e44818445255c13563b90f7112068255caba.exe
Size

364KB
MD5

c43653d6e731c3daca92d578a8b8e41d
SHA1

e239fb0c28050fbbbfa392ffdee91c401500a89f
SHA256

282866097e1dfb5c11e0af461439e44818445255c13563b90f7112068255caba
SHA512

f37c59e3885e413bc1c8db8dc858238aa7d7410f904222a3097ad4630494de8e09584478d2f1a3a83a8dd1425c841f97087ee3d3e3e58d56dee1bd852ae6abb5
SSDEEP

6144:US0t5FW7l8UYZb1jNb41/6vpo+kveaeldhFeyf8rSYMOLcPZuBkT7YKkUT3fgF:US0nY7+5ao6DmlLhFerrSYMOEZuBkPTQ

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/1412-65-0x0000029979AB0000-0x000002997D2E4000-memory.dmp	family_zgrat_v1
behavioral2/memory/1412-66-0x000002991A350000-0x000002991A45A000-memory.dmp	family_zgrat_v1
behavioral2/memory/1412-70-0x000002991A4B0000-0x000002991A4D4000-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
3564	u3pk.0.exe
3280	u3pk.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
2296	4808	WerFault.exe	77
1896	3564	WerFault.exe	80

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	u3pk.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3pk.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3pk.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	u3pk.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3pk.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3564	u3pk.0.exe
3564	u3pk.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1412	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
3280	u3pk.1.exe
3280	u3pk.1.exe
3280	u3pk.1.exe
3280	u3pk.1.exe
3280	u3pk.1.exe
3280	u3pk.1.exe
3280	u3pk.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
3280	u3pk.1.exe
3280	u3pk.1.exe
3280	u3pk.1.exe
3280	u3pk.1.exe
3280	u3pk.1.exe
3280	u3pk.1.exe
3280	u3pk.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4808 wrote to memory of 3564	4808	282866097e1dfb5c11e0af461439e44818445255c13563b90f7112068255caba.exe	80
PID 4808 wrote to memory of 3564	4808	282866097e1dfb5c11e0af461439e44818445255c13563b90f7112068255caba.exe	80
PID 4808 wrote to memory of 3564	4808	282866097e1dfb5c11e0af461439e44818445255c13563b90f7112068255caba.exe	80
PID 4808 wrote to memory of 3280	4808	282866097e1dfb5c11e0af461439e44818445255c13563b90f7112068255caba.exe	83
PID 4808 wrote to memory of 3280	4808	282866097e1dfb5c11e0af461439e44818445255c13563b90f7112068255caba.exe	83
PID 4808 wrote to memory of 3280	4808	282866097e1dfb5c11e0af461439e44818445255c13563b90f7112068255caba.exe	83
PID 3280 wrote to memory of 1412	3280	u3pk.1.exe	88
PID 3280 wrote to memory of 1412	3280	u3pk.1.exe	88

C:\Users\Admin\AppData\Local\Temp\282866097e1dfb5c11e0af461439e44818445255c13563b90f7112068255caba.exe
"C:\Users\Admin\AppData\Local\Temp\282866097e1dfb5c11e0af461439e44818445255c13563b90f7112068255caba.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4808
- C:\Users\Admin\AppData\Local\Temp\u3pk.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3pk.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3564
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3564 -s 1144
    3⤵
    - Program crash
    PID:1896
- C:\Users\Admin\AppData\Local\Temp\u3pk.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3pk.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:3280
- - 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:1412
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4808 -s 1532
  2⤵
  - Program crash
  PID:2296

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4808 -ip 4808
1⤵
PID:912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 3564 -ip 3564
1⤵
PID:2080

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
fed77564c681a610b9c1eda795d0d1f6

SHA1
5d91cdb26fe2b1e7b9e705dc390e27dc8de6b087

SHA256
154ec78a8c0a2fbbb5d6a624d49c1f62d818427fdab8d70dfaf10e8797684f8f

SHA512
d8c547b33092712a29158ed28b91501eb24d298cde81f253f9a64ae643857cf89fef04116cb2bda2e5031660ed95141bd2ed5a4e196ef199c0f6a240ea6e8a79

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3pk.0.exe

Filesize
223KB

MD5
eba29f456da60d82c13021441b3d7798

SHA1
d1a4fe3c8002d5be2393e5ae92892232d8e4a78e

SHA256
5edef454c9c9622255eb8616c5cb841f80cfe6cfc470f3ac2d46ca6ad0b64ff1

SHA512
f47e99c4926e261c134db7198b98abe138a79db12a88a6112fc34770a7cd01ad2c1cb1c4ca71bb5290d22ef4d8d17901583eb519633a823fdd94db1843e3461f

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3pk.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1412-86-0x000002991EB60000-0x000002991EB6A000-memory.dmp

Filesize
40KB

Download
memory/1412-87-0x000002991F490000-0x000002991F4F2000-memory.dmp

Filesize
392KB

Download
memory/1412-74-0x000002997D720000-0x000002997D770000-memory.dmp

Filesize
320KB

Download
memory/1412-95-0x000002997D770000-0x000002997D78E000-memory.dmp

Filesize
120KB

Download
memory/1412-93-0x000002997D880000-0x000002997D8F6000-memory.dmp

Filesize
472KB

Download
memory/1412-92-0x000002991EB90000-0x000002991EB9C000-memory.dmp

Filesize
48KB

Download
memory/1412-89-0x000002991FA20000-0x000002991FF48000-memory.dmp

Filesize
5.2MB

Download
memory/1412-88-0x000002991EB70000-0x000002991EB92000-memory.dmp

Filesize
136KB

Download
memory/1412-73-0x000002991A6A0000-0x000002991A752000-memory.dmp

Filesize
712KB

Download
memory/1412-85-0x000002997D6B0000-0x000002997D6B8000-memory.dmp

Filesize
32KB

Download
memory/1412-65-0x0000029979AB0000-0x000002997D2E4000-memory.dmp

Filesize
56.2MB

Download
memory/1412-67-0x00000299018D0000-0x00000299018E0000-memory.dmp

Filesize
64KB

Download
memory/1412-66-0x000002991A350000-0x000002991A45A000-memory.dmp

Filesize
1.0MB

Download
memory/1412-68-0x0000029901900000-0x000002990190C000-memory.dmp

Filesize
48KB

Download
memory/1412-69-0x00000299018E0000-0x00000299018F4000-memory.dmp

Filesize
80KB

Download
memory/1412-70-0x000002991A4B0000-0x000002991A4D4000-memory.dmp

Filesize
144KB

Download
memory/1412-71-0x000002991A640000-0x000002991A64A000-memory.dmp

Filesize
40KB

Download
memory/1412-72-0x000002991A660000-0x000002991A68A000-memory.dmp

Filesize
168KB

Download
memory/1412-75-0x000002997D6D0000-0x000002997D6F2000-memory.dmp

Filesize
136KB

Download
memory/1412-83-0x000002997D7C0000-0x000002997D7F8000-memory.dmp

Filesize
224KB

Download
memory/1412-84-0x000002997D6A0000-0x000002997D6AE000-memory.dmp

Filesize
56KB

Download
memory/1412-76-0x0000029901870000-0x000002990187A000-memory.dmp

Filesize
40KB

Download
memory/1412-80-0x000002991A750000-0x000002991AA50000-memory.dmp

Filesize
3.0MB

Download
memory/1412-82-0x000002997D690000-0x000002997D698000-memory.dmp

Filesize
32KB

Download
memory/3280-63-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3564-97-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/3564-104-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/3564-14-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/3564-13-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/3564-102-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/3564-100-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/3564-51-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4808-34-0x0000000003750000-0x00000000037BC000-memory.dmp

Filesize
432KB

Download
memory/4808-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4808-35-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4808-33-0x0000000000400000-0x0000000001A25000-memory.dmp

Filesize
22.1MB

Download
memory/4808-1-0x0000000001BA0000-0x0000000001CA0000-memory.dmp

Filesize
1024KB

Download
memory/4808-2-0x0000000003750000-0x00000000037BC000-memory.dmp

Filesize
432KB

Download