stealc | e539050e1d5a7f6fb3a00d623dc41c47a636a6804d45c0b42543ba7cbaeb4b1c

Analysis

max time kernel
127s
max time network
131s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
09-05-2024 15:50

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General

Target

e539050e1d5a7f6fb3a00d623dc41c47a636a6804d45c0b42543ba7cbaeb4b1c.exe
Size

382KB
MD5

ffa9e34a4631cabb38b38c84a54423d1
SHA1

94c3d06ce4611c5e5a4cd9eaae9dfc1f3defe8ac
SHA256

e539050e1d5a7f6fb3a00d623dc41c47a636a6804d45c0b42543ba7cbaeb4b1c
SHA512

344fd78ade224723aa5e032d15e5d7ae35cab2e990ff4fda9a4681bfd8a5d02d04a81065488d83e09ddcfc24041e1d85eb682ca2ace6c7a3a717f2cff0b55027
SSDEEP

6144:6vNgu2vVzeAvNremF2xnbfS13eB43pvuL7HpyEeJKXM:6vNL2vVSzmQxnbf4mCSHpy9JKXM

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/4324-67-0x000001F6A54C0000-0x000001F6A8CF4000-memory.dmp	family_zgrat_v1
behavioral2/memory/4324-68-0x000001F6C3570000-0x000001F6C367A000-memory.dmp	family_zgrat_v1
behavioral2/memory/4324-72-0x000001F6C3470000-0x000001F6C3494000-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
2612	u15k.0.exe
2972	u15k.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
3532	1496	WerFault.exe	78
4028	2612	WerFault.exe	81

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	u15k.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u15k.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u15k.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	u15k.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u15k.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2612	u15k.0.exe
2612	u15k.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4324	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2972	u15k.1.exe
2972	u15k.1.exe
2972	u15k.1.exe
2972	u15k.1.exe
2972	u15k.1.exe
2972	u15k.1.exe
2972	u15k.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2972	u15k.1.exe
2972	u15k.1.exe
2972	u15k.1.exe
2972	u15k.1.exe
2972	u15k.1.exe
2972	u15k.1.exe
2972	u15k.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1496 wrote to memory of 2612	1496	e539050e1d5a7f6fb3a00d623dc41c47a636a6804d45c0b42543ba7cbaeb4b1c.exe	81
PID 1496 wrote to memory of 2612	1496	e539050e1d5a7f6fb3a00d623dc41c47a636a6804d45c0b42543ba7cbaeb4b1c.exe	81
PID 1496 wrote to memory of 2612	1496	e539050e1d5a7f6fb3a00d623dc41c47a636a6804d45c0b42543ba7cbaeb4b1c.exe	81
PID 1496 wrote to memory of 2972	1496	e539050e1d5a7f6fb3a00d623dc41c47a636a6804d45c0b42543ba7cbaeb4b1c.exe	84
PID 1496 wrote to memory of 2972	1496	e539050e1d5a7f6fb3a00d623dc41c47a636a6804d45c0b42543ba7cbaeb4b1c.exe	84
PID 1496 wrote to memory of 2972	1496	e539050e1d5a7f6fb3a00d623dc41c47a636a6804d45c0b42543ba7cbaeb4b1c.exe	84
PID 2972 wrote to memory of 4324	2972	u15k.1.exe	89
PID 2972 wrote to memory of 4324	2972	u15k.1.exe	89

C:\Users\Admin\AppData\Local\Temp\e539050e1d5a7f6fb3a00d623dc41c47a636a6804d45c0b42543ba7cbaeb4b1c.exe
"C:\Users\Admin\AppData\Local\Temp\e539050e1d5a7f6fb3a00d623dc41c47a636a6804d45c0b42543ba7cbaeb4b1c.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1496
- C:\Users\Admin\AppData\Local\Temp\u15k.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u15k.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2612
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2612 -s 1368
    3⤵
    - Program crash
    PID:4028
- C:\Users\Admin\AppData\Local\Temp\u15k.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u15k.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2972
- - 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:4324
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1496 -s 1056
  2⤵
  - Program crash
  PID:3532

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1496 -ip 1496
1⤵
PID:3056

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 2612 -ip 2612
1⤵
PID:1744

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\u15k.0.exe

Filesize
218KB

MD5
967d1d2071a7f0afa075145319eea73d

SHA1
43208843e80266106e5c96867e7113e90a6f0b59

SHA256
dce56b03d138ced62c5137c164d18240efe3e4a084c70547614b657e2049c6af

SHA512
a7934590abdf271c8ce450ef02bd2fef6aecded10390312f7a340071920e8044886a28dfa8fc415c7da6971c79e85347c5669d73da4a179fc8a56838cd114669

Download Submit
C:\Users\Admin\AppData\Local\Temp\u15k.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1496-30-0x0000000000400000-0x0000000002B1D000-memory.dmp

Filesize
39.1MB

Download
memory/1496-2-0x0000000004880000-0x00000000048EC000-memory.dmp

Filesize
432KB

Download
memory/1496-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/1496-32-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/1496-1-0x0000000002DE0000-0x0000000002EE0000-memory.dmp

Filesize
1024KB

Download
memory/2612-37-0x0000000000400000-0x0000000002AF4000-memory.dmp

Filesize
39.0MB

Download
memory/2612-53-0x0000000000400000-0x0000000002AF4000-memory.dmp

Filesize
39.0MB

Download
memory/2612-106-0x0000000000400000-0x0000000002AF4000-memory.dmp

Filesize
39.0MB

Download
memory/2612-104-0x0000000000400000-0x0000000002AF4000-memory.dmp

Filesize
39.0MB

Download
memory/2612-102-0x0000000000400000-0x0000000002AF4000-memory.dmp

Filesize
39.0MB

Download
memory/2612-100-0x0000000000400000-0x0000000002AF4000-memory.dmp

Filesize
39.0MB

Download
memory/2972-54-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2972-66-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4324-74-0x000001F6C34A0000-0x000001F6C34CA000-memory.dmp

Filesize
168KB

Download
memory/4324-86-0x000001F6C7C20000-0x000001F6C7C2E000-memory.dmp

Filesize
56KB

Download
memory/4324-73-0x000001F6AAC90000-0x000001F6AAC9A000-memory.dmp

Filesize
40KB

Download
memory/4324-71-0x000001F6A91A0000-0x000001F6A91B4000-memory.dmp

Filesize
80KB

Download
memory/4324-75-0x000001F6C37D0000-0x000001F6C3882000-memory.dmp

Filesize
712KB

Download
memory/4324-76-0x000001F6C3880000-0x000001F6C38D0000-memory.dmp

Filesize
320KB

Download
memory/4324-77-0x000001F6C3500000-0x000001F6C3522000-memory.dmp

Filesize
136KB

Download
memory/4324-78-0x000001F6A9160000-0x000001F6A916A000-memory.dmp

Filesize
40KB

Download
memory/4324-82-0x000001F6C38D0000-0x000001F6C3BD0000-memory.dmp

Filesize
3.0MB

Download
memory/4324-84-0x000001F6C8310000-0x000001F6C8318000-memory.dmp

Filesize
32KB

Download
memory/4324-85-0x000001F6C7C50000-0x000001F6C7C88000-memory.dmp

Filesize
224KB

Download
memory/4324-72-0x000001F6C3470000-0x000001F6C3494000-memory.dmp

Filesize
144KB

Download
memory/4324-87-0x000001F6C7C40000-0x000001F6C7C48000-memory.dmp

Filesize
32KB

Download
memory/4324-88-0x000001F6C8330000-0x000001F6C833A000-memory.dmp

Filesize
40KB

Download
memory/4324-89-0x000001F6C85E0000-0x000001F6C8642000-memory.dmp

Filesize
392KB

Download
memory/4324-90-0x000001F6C8350000-0x000001F6C8372000-memory.dmp

Filesize
136KB

Download
memory/4324-91-0x000001F6C8B70000-0x000001F6C9098000-memory.dmp

Filesize
5.2MB

Download
memory/4324-94-0x000001F6C8370000-0x000001F6C837C000-memory.dmp

Filesize
48KB

Download
memory/4324-95-0x000001F6C8450000-0x000001F6C84C6000-memory.dmp

Filesize
472KB

Download
memory/4324-96-0x000001F6C83B0000-0x000001F6C83CE000-memory.dmp

Filesize
120KB

Download
memory/4324-69-0x000001F6A9190000-0x000001F6A91A0000-memory.dmp

Filesize
64KB

Download
memory/4324-70-0x000001F6AAC10000-0x000001F6AAC1C000-memory.dmp

Filesize
48KB

Download
memory/4324-68-0x000001F6C3570000-0x000001F6C367A000-memory.dmp

Filesize
1.0MB

Download
memory/4324-67-0x000001F6A54C0000-0x000001F6A8CF4000-memory.dmp

Filesize
56.2MB

Download