stealc | 1c5dc315ad31a535dee591cb30d3e461e010831fafc705145b7e99f6790b6766

Analysis

max time kernel
94s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2024, 15:17

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General

Target

1c5dc315ad31a535dee591cb30d3e461e010831fafc705145b7e99f6790b6766.exe
Size

411KB
MD5

0466201bfef35e895f337de2ea24daa3
SHA1

09e4195fb70595c361dd7ad7f59000c1beb10f14
SHA256

1c5dc315ad31a535dee591cb30d3e461e010831fafc705145b7e99f6790b6766
SHA512

e834ff974e03879405c79575d0ba7d61df322d01281c9ebd84515917f8a68a5e0075c9ad358c2be305597a8dbe36a100c92c2098d3b255946447e987c7784ac4
SSDEEP

6144:fmFaLLIPKVobroerIKzrJ+USSgaFLO33bd3C7U2tv0JEPcYe7Zzt8Qv:fmFaPIJQrQJiSgfxevQEPc9BtLv

Score

10^/10

stealc zgrat rat stealer

Malware Config

Signatures

Detect ZGRat V1 3 IoCs

resource	yara_rule
behavioral1/memory/3436-72-0x0000026FF85F0000-0x0000026FFBEE8000-memory.dmp	family_zgrat_v1
behavioral1/memory/3436-75-0x0000026FFF5D0000-0x0000026FFF6E0000-memory.dmp	family_zgrat_v1
behavioral1/memory/3436-79-0x0000026FFF450000-0x0000026FFF474000-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

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-553605503-2331009851-2137262461-1000\Control Panel\International\Geo\Nation	u1dk.1.exe
Key value queried	\REGISTRY\USER\S-1-5-21-553605503-2331009851-2137262461-1000\Control Panel\International\Geo\Nation	1c5dc315ad31a535dee591cb30d3e461e010831fafc705145b7e99f6790b6766.exe

Executes dropped EXE 2 IoCs

pid	Process
4560	u1dk.0.exe
2396	u1dk.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
1996	4560	WerFault.exe	87
1416	1784	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	u1dk.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u1dk.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u1dk.1.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3436	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2396	u1dk.1.exe
2396	u1dk.1.exe
2396	u1dk.1.exe
2396	u1dk.1.exe
2396	u1dk.1.exe
2396	u1dk.1.exe
2396	u1dk.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2396	u1dk.1.exe
2396	u1dk.1.exe
2396	u1dk.1.exe
2396	u1dk.1.exe
2396	u1dk.1.exe
2396	u1dk.1.exe
2396	u1dk.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1784 wrote to memory of 4560	1784	1c5dc315ad31a535dee591cb30d3e461e010831fafc705145b7e99f6790b6766.exe	87
PID 1784 wrote to memory of 4560	1784	1c5dc315ad31a535dee591cb30d3e461e010831fafc705145b7e99f6790b6766.exe	87
PID 1784 wrote to memory of 4560	1784	1c5dc315ad31a535dee591cb30d3e461e010831fafc705145b7e99f6790b6766.exe	87
PID 1784 wrote to memory of 2396	1784	1c5dc315ad31a535dee591cb30d3e461e010831fafc705145b7e99f6790b6766.exe	90
PID 1784 wrote to memory of 2396	1784	1c5dc315ad31a535dee591cb30d3e461e010831fafc705145b7e99f6790b6766.exe	90
PID 1784 wrote to memory of 2396	1784	1c5dc315ad31a535dee591cb30d3e461e010831fafc705145b7e99f6790b6766.exe	90
PID 2396 wrote to memory of 3436	2396	u1dk.1.exe	98
PID 2396 wrote to memory of 3436	2396	u1dk.1.exe	98

C:\Users\Admin\AppData\Local\Temp\1c5dc315ad31a535dee591cb30d3e461e010831fafc705145b7e99f6790b6766.exe
"C:\Users\Admin\AppData\Local\Temp\1c5dc315ad31a535dee591cb30d3e461e010831fafc705145b7e99f6790b6766.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1784
- C:\Users\Admin\AppData\Local\Temp\u1dk.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u1dk.0.exe"
  2⤵
  - Executes dropped EXE
  PID:4560
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4560 -s 948
    3⤵
    - Program crash
    PID:1996
- C:\Users\Admin\AppData\Local\Temp\u1dk.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u1dk.1.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2396
- - 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:3436
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1784 -s 1164
  2⤵
  - Program crash
  PID:1416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4560 -ip 4560
1⤵
PID:1064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 1784 -ip 1784
1⤵
PID:4072

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
36c17990c8f153a2961ba4727b3f3b7d

SHA1
6361ffa715e5796bb5f64c23fd66b0f003e555a7

SHA256
ade44e5d14082a544008cebe70eee7540569e72494fef16edab5e627993c42fd

SHA512
0e2d80da8568b31721e962c8a36b096f046cb1ed03d4fdb581c04dcd1dca507f9a9d7b5c92f4b01ad680f7e4c0100599fa09ebe2df12f0fd3e9e53171ae677f5

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1dk.0.exe

Filesize
270KB

MD5
33d4908e1f29fdf496f576cee380f29e

SHA1
273e70126dab9b45b4820f8af05cc4575925705e

SHA256
e54774efd14dfd4473cad145f9db71433cda5133b88c822048342de96bcedfe0

SHA512
9a74c8212ab2cbda8520ecc32632ed0630946d1432a0996cddd3186e26959995a12435bcb64000611e4edb45e1be490c617ba67dbc704e6e0829eae3c0a87cfe

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1dk.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1784-2-0x00000000048A0000-0x000000000490D000-memory.dmp

Filesize
436KB

Download
memory/1784-3-0x0000000000400000-0x0000000002C49000-memory.dmp

Filesize
40.3MB

Download
memory/1784-1-0x0000000002E00000-0x0000000002F00000-memory.dmp

Filesize
1024KB

Download
memory/1784-26-0x0000000000400000-0x0000000002C49000-memory.dmp

Filesize
40.3MB

Download
memory/1784-38-0x00000000048A0000-0x000000000490D000-memory.dmp

Filesize
436KB

Download
memory/2396-39-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2396-71-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2396-70-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2396-29-0x0000000000AA0000-0x0000000000AA1000-memory.dmp

Filesize
4KB

Download
memory/3436-80-0x0000026F98000000-0x0000026F9800A000-memory.dmp

Filesize
40KB

Download
memory/3436-90-0x0000026F981F0000-0x0000026F984F0000-memory.dmp

Filesize
3.0MB

Download
memory/3436-112-0x0000026FFE370000-0x0000026FFE380000-memory.dmp

Filesize
64KB

Download
memory/3436-111-0x0000026FFE370000-0x0000026FFE380000-memory.dmp

Filesize
64KB

Download
memory/3436-72-0x0000026FF85F0000-0x0000026FFBEE8000-memory.dmp

Filesize
57.0MB

Download
memory/3436-73-0x00007FFF2C830000-0x00007FFF2D2F1000-memory.dmp

Filesize
10.8MB

Download
memory/3436-74-0x0000026FFE370000-0x0000026FFE380000-memory.dmp

Filesize
64KB

Download
memory/3436-75-0x0000026FFF5D0000-0x0000026FFF6E0000-memory.dmp

Filesize
1.1MB

Download
memory/3436-76-0x0000026FFE350000-0x0000026FFE360000-memory.dmp

Filesize
64KB

Download
memory/3436-77-0x0000026FFE380000-0x0000026FFE38C000-memory.dmp

Filesize
48KB

Download
memory/3436-78-0x0000026FFE360000-0x0000026FFE374000-memory.dmp

Filesize
80KB

Download
memory/3436-79-0x0000026FFF450000-0x0000026FFF474000-memory.dmp

Filesize
144KB

Download
memory/3436-110-0x0000026FFE370000-0x0000026FFE380000-memory.dmp

Filesize
64KB

Download
memory/3436-81-0x0000026F98010000-0x0000026F980C2000-memory.dmp

Filesize
712KB

Download
memory/3436-82-0x0000026F980D0000-0x0000026F980FA000-memory.dmp

Filesize
168KB

Download
memory/3436-83-0x0000026F98100000-0x0000026F9817A000-memory.dmp

Filesize
488KB

Download
memory/3436-84-0x0000026F98190000-0x0000026F981F2000-memory.dmp

Filesize
392KB

Download
memory/3436-85-0x0000026FFF8A0000-0x0000026FFF916000-memory.dmp

Filesize
472KB

Download
memory/3436-86-0x0000026F980C0000-0x0000026F980CA000-memory.dmp

Filesize
40KB

Download
memory/3436-109-0x0000026FFE370000-0x0000026FFE380000-memory.dmp

Filesize
64KB

Download
memory/3436-92-0x0000026FFE370000-0x0000026FFE380000-memory.dmp

Filesize
64KB

Download
memory/3436-93-0x0000026FFE370000-0x0000026FFE380000-memory.dmp

Filesize
64KB

Download
memory/3436-94-0x0000026FFE340000-0x0000026FFE348000-memory.dmp

Filesize
32KB

Download
memory/3436-95-0x0000026FFF820000-0x0000026FFF858000-memory.dmp

Filesize
224KB

Download
memory/3436-96-0x0000026FFF470000-0x0000026FFF47E000-memory.dmp

Filesize
56KB

Download
memory/3436-97-0x0000026F9C620000-0x0000026F9C62A000-memory.dmp

Filesize
40KB

Download
memory/3436-98-0x0000026F9C630000-0x0000026F9C652000-memory.dmp

Filesize
136KB

Download
memory/3436-99-0x0000026F9D9A0000-0x0000026F9DEC8000-memory.dmp

Filesize
5.2MB

Download
memory/3436-102-0x0000026FFF920000-0x0000026FFF970000-memory.dmp

Filesize
320KB

Download
memory/3436-104-0x0000026FFE370000-0x0000026FFE380000-memory.dmp

Filesize
64KB

Download
memory/3436-103-0x0000026F9C650000-0x0000026F9C65C000-memory.dmp

Filesize
48KB

Download
memory/3436-105-0x0000026FFF860000-0x0000026FFF882000-memory.dmp

Filesize
136KB

Download
memory/3436-106-0x0000026FFF4A0000-0x0000026FFF4BE000-memory.dmp

Filesize
120KB

Download
memory/3436-108-0x00007FFF2C830000-0x00007FFF2D2F1000-memory.dmp

Filesize
10.8MB

Download
memory/4560-32-0x0000000000400000-0x0000000002C26000-memory.dmp

Filesize
40.1MB

Download
memory/4560-13-0x0000000002DA0000-0x0000000002EA0000-memory.dmp

Filesize
1024KB

Download
memory/4560-14-0x0000000004840000-0x0000000004867000-memory.dmp

Filesize
156KB

Download
memory/4560-15-0x0000000000400000-0x0000000002C26000-memory.dmp

Filesize
40.1MB

Download