stealc | 9abf357befc1310b1960a5a976866438d916ab066aeb15cc43a9713b29bf300e

Analysis

max time kernel
125s
max time network
128s
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 13:23

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General

Target

9abf357befc1310b1960a5a976866438d916ab066aeb15cc43a9713b29bf300e.exe
Size

368KB
MD5

5af092dba0ea0929354397630215b41a
SHA1

fd605744f6d4f629e22e7a2fb370c8da4dc21d83
SHA256

9abf357befc1310b1960a5a976866438d916ab066aeb15cc43a9713b29bf300e
SHA512

5e16cae0240a1de45bc474c53bb00ca720fb030c66dac7e74c762e137e5b2361f9e0a89399d39b4b0d9b38b3bb18a49fc10176ec1afe1c54bc1c5d5583e01ab9
SSDEEP

6144:/jRhVhZVNlrECRfaajfnwdgcXlzbrp5nkaALQf4jTfef:lrLNrEWCazK3XFh5vALQUfef

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/3716-66-0x0000018100000000-0x0000018103834000-memory.dmp	family_zgrat_v1
behavioral2/memory/3716-67-0x000001809A330000-0x000001809A43A000-memory.dmp	family_zgrat_v1
behavioral2/memory/3716-71-0x000001809A4B0000-0x000001809A4D4000-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
1332	u1bs.0.exe
2152	u1bs.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
2552	1720	WerFault.exe	79
1960	1332	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	u1bs.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u1bs.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u1bs.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	u1bs.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u1bs.0.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1332	u1bs.0.exe
1332	u1bs.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3716	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2152	u1bs.1.exe
2152	u1bs.1.exe
2152	u1bs.1.exe
2152	u1bs.1.exe
2152	u1bs.1.exe
2152	u1bs.1.exe
2152	u1bs.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2152	u1bs.1.exe
2152	u1bs.1.exe
2152	u1bs.1.exe
2152	u1bs.1.exe
2152	u1bs.1.exe
2152	u1bs.1.exe
2152	u1bs.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1720 wrote to memory of 1332	1720	9abf357befc1310b1960a5a976866438d916ab066aeb15cc43a9713b29bf300e.exe	82
PID 1720 wrote to memory of 1332	1720	9abf357befc1310b1960a5a976866438d916ab066aeb15cc43a9713b29bf300e.exe	82
PID 1720 wrote to memory of 1332	1720	9abf357befc1310b1960a5a976866438d916ab066aeb15cc43a9713b29bf300e.exe	82
PID 1720 wrote to memory of 2152	1720	9abf357befc1310b1960a5a976866438d916ab066aeb15cc43a9713b29bf300e.exe	85
PID 1720 wrote to memory of 2152	1720	9abf357befc1310b1960a5a976866438d916ab066aeb15cc43a9713b29bf300e.exe	85
PID 1720 wrote to memory of 2152	1720	9abf357befc1310b1960a5a976866438d916ab066aeb15cc43a9713b29bf300e.exe	85
PID 2152 wrote to memory of 3716	2152	u1bs.1.exe	90
PID 2152 wrote to memory of 3716	2152	u1bs.1.exe	90

C:\Users\Admin\AppData\Local\Temp\9abf357befc1310b1960a5a976866438d916ab066aeb15cc43a9713b29bf300e.exe
"C:\Users\Admin\AppData\Local\Temp\9abf357befc1310b1960a5a976866438d916ab066aeb15cc43a9713b29bf300e.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1720
- C:\Users\Admin\AppData\Local\Temp\u1bs.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u1bs.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1332
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1332 -s 1392
    3⤵
    - Program crash
    PID:1960
- C:\Users\Admin\AppData\Local\Temp\u1bs.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u1bs.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2152
- - 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:3716
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1720 -s 1532
  2⤵
  - Program crash
  PID:2552

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1720 -ip 1720
1⤵
PID:4728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1332 -ip 1332
1⤵
PID:1588

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
2KB

MD5
dbfd0ae967fba49b6fb8437605070949

SHA1
126020b65af62fcc7ee49918eaffb8a6dc20b3c0

SHA256
fa19f9ea8d129b7b8fd66c32b1b8771ea2b0c32081a61972860b9d6b2013d246

SHA512
75695e0bb71f76e006e95fe565dc65f33b149e160f067b30987a9c7f09781e2a7cc3815121b9a9df9886dbdbc3eaff37f60ea3552aca20f6707fff5f13112af2

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1bs.0.exe

Filesize
226KB

MD5
c4b38f17b16a0b545d989a5e7f192308

SHA1
7325ba75f76855f332e840d595cadc591ea220af

SHA256
45072f942cb27587d1815a9c079c066c85ac313fe1388fd61dd69c77bdc68b4b

SHA512
ca30aa925c6bec667fa4aceda9918d9e7c1ddee1fb7eded4ee266f6f6ae2d3e2fea7070049dc28540615832fc2e60e2821aabc839f468d446b44e082558ef041

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1bs.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1332-98-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1332-101-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1332-13-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1332-14-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1332-27-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1332-103-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1332-105-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1720-32-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/1720-30-0x0000000000400000-0x0000000001A26000-memory.dmp

Filesize
22.1MB

Download
memory/1720-31-0x0000000003740000-0x00000000037AC000-memory.dmp

Filesize
432KB

Download
memory/1720-1-0x0000000001C60000-0x0000000001D60000-memory.dmp

Filesize
1024KB

Download
memory/1720-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/1720-2-0x0000000003740000-0x00000000037AC000-memory.dmp

Filesize
432KB

Download
memory/2152-62-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2152-65-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3716-72-0x000001809A4E0000-0x000001809A4EA000-memory.dmp

Filesize
40KB

Download
memory/3716-85-0x00000180FD020000-0x00000180FD02E000-memory.dmp

Filesize
56KB

Download
memory/3716-70-0x000001809A440000-0x000001809A454000-memory.dmp

Filesize
80KB

Download
memory/3716-74-0x000001809A670000-0x000001809A69A000-memory.dmp

Filesize
168KB

Download
memory/3716-73-0x000001809A6A0000-0x000001809A752000-memory.dmp

Filesize
712KB

Download
memory/3716-75-0x00000180FD070000-0x00000180FD0C0000-memory.dmp

Filesize
320KB

Download
memory/3716-76-0x00000180FD0C0000-0x00000180FD0E2000-memory.dmp

Filesize
136KB

Download
memory/3716-77-0x0000018081920000-0x000001808192A000-memory.dmp

Filesize
40KB

Download
memory/3716-81-0x000001809A750000-0x000001809AA50000-memory.dmp

Filesize
3.0MB

Download
memory/3716-83-0x00000180FD000000-0x00000180FD008000-memory.dmp

Filesize
32KB

Download
memory/3716-86-0x00000180FD030000-0x00000180FD038000-memory.dmp

Filesize
32KB

Download
memory/3716-71-0x000001809A4B0000-0x000001809A4D4000-memory.dmp

Filesize
144KB

Download
memory/3716-84-0x00000180FD0F0000-0x00000180FD128000-memory.dmp

Filesize
224KB

Download
memory/3716-87-0x000001809EB90000-0x000001809EB9A000-memory.dmp

Filesize
40KB

Download
memory/3716-88-0x000001809F1E0000-0x000001809F242000-memory.dmp

Filesize
392KB

Download
memory/3716-89-0x000001809EBB0000-0x000001809EBD2000-memory.dmp

Filesize
136KB

Download
memory/3716-90-0x000001809F770000-0x000001809FC98000-memory.dmp

Filesize
5.2MB

Download
memory/3716-93-0x000001809EBD0000-0x000001809EBDC000-memory.dmp

Filesize
48KB

Download
memory/3716-94-0x00000180FD1B0000-0x00000180FD226000-memory.dmp

Filesize
472KB

Download
memory/3716-95-0x00000180FD130000-0x00000180FD14E000-memory.dmp

Filesize
120KB

Download
memory/3716-69-0x000001809A450000-0x000001809A45C000-memory.dmp

Filesize
48KB

Download
memory/3716-68-0x0000018081940000-0x0000018081950000-memory.dmp

Filesize
64KB

Download
memory/3716-67-0x000001809A330000-0x000001809A43A000-memory.dmp

Filesize
1.0MB

Download
memory/3716-66-0x0000018100000000-0x0000018103834000-memory.dmp

Filesize
56.2MB

Download