stealc | 3a6571ca197b5ee4a0bf6d2cf32e4f35c133ce313253c9ed2b07977c22518842

Analysis

max time kernel
147s
max time network
149s
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 19:39

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General

Target

3a6571ca197b5ee4a0bf6d2cf32e4f35c133ce313253c9ed2b07977c22518842.exe
Size

384KB
MD5

a09d068dbe8e20e489d1d16a67fa9c92
SHA1

1ab47f34b06ce91e99ed260563ff431b776df525
SHA256

3a6571ca197b5ee4a0bf6d2cf32e4f35c133ce313253c9ed2b07977c22518842
SHA512

ea4a0b72c3dbdee23413216a3740826ff19db61a14724541d7046c1ae590392a235c58763524f7c490bd9d34f112f511c86669cd019c6b4dcd48ef47157892c5
SSDEEP

6144:2nNm4Za4Cv1GOuLzYI0dBXV9TCS/lMEGFZCTiQJ0s/:2nNNZg1GOuL5SV9TNyEGFTQP/

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/2448-66-0x000001AD9F880000-0x000001ADA30B4000-memory.dmp	family_zgrat_v1
behavioral2/memory/2448-71-0x000001ADA4DD0000-0x000001ADA4DF4000-memory.dmp	family_zgrat_v1
behavioral2/memory/2448-67-0x000001ADBD840000-0x000001ADBD94A000-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
4156	u3tw.0.exe
4460	u3tw.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
648	4964	WerFault.exe	77
3232	4156	WerFault.exe	78

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 queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3tw.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3tw.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3tw.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	u3tw.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3tw.0.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4156	u3tw.0.exe
4156	u3tw.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2448	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
4460	u3tw.1.exe
4460	u3tw.1.exe
4460	u3tw.1.exe
4460	u3tw.1.exe
4460	u3tw.1.exe
4460	u3tw.1.exe
4460	u3tw.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
4460	u3tw.1.exe
4460	u3tw.1.exe
4460	u3tw.1.exe
4460	u3tw.1.exe
4460	u3tw.1.exe
4460	u3tw.1.exe
4460	u3tw.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4964 wrote to memory of 4156	4964	3a6571ca197b5ee4a0bf6d2cf32e4f35c133ce313253c9ed2b07977c22518842.exe	78
PID 4964 wrote to memory of 4156	4964	3a6571ca197b5ee4a0bf6d2cf32e4f35c133ce313253c9ed2b07977c22518842.exe	78
PID 4964 wrote to memory of 4156	4964	3a6571ca197b5ee4a0bf6d2cf32e4f35c133ce313253c9ed2b07977c22518842.exe	78
PID 4964 wrote to memory of 4460	4964	3a6571ca197b5ee4a0bf6d2cf32e4f35c133ce313253c9ed2b07977c22518842.exe	81
PID 4964 wrote to memory of 4460	4964	3a6571ca197b5ee4a0bf6d2cf32e4f35c133ce313253c9ed2b07977c22518842.exe	81
PID 4964 wrote to memory of 4460	4964	3a6571ca197b5ee4a0bf6d2cf32e4f35c133ce313253c9ed2b07977c22518842.exe	81
PID 4460 wrote to memory of 2448	4460	u3tw.1.exe	86
PID 4460 wrote to memory of 2448	4460	u3tw.1.exe	86

C:\Users\Admin\AppData\Local\Temp\3a6571ca197b5ee4a0bf6d2cf32e4f35c133ce313253c9ed2b07977c22518842.exe
"C:\Users\Admin\AppData\Local\Temp\3a6571ca197b5ee4a0bf6d2cf32e4f35c133ce313253c9ed2b07977c22518842.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4964
- C:\Users\Admin\AppData\Local\Temp\u3tw.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3tw.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4156
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4156 -s 1372
    3⤵
    - Program crash
    PID:3232
- C:\Users\Admin\AppData\Local\Temp\u3tw.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3tw.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4460
- - 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:2448
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4964 -s 1192
  2⤵
  - Program crash
  PID:648

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4964 -ip 4964
1⤵
PID:1600

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4156 -ip 4156
1⤵
PID:2844

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
2KB

MD5
c577308ddc91306766fb52c3949018e9

SHA1
f5cd44e6a5565831841df2dceb5d3733cdc3513e

SHA256
6f956b1390d894c27c661a9b924f04967f561db79be360b4b3459c5624998848

SHA512
5ef813eeb0c4beac58fd486559253ddfd51d90b0e009fff344ae1c7bdab74bcfb3a67b91a5615a8e4d0c3b1ea53f5e21ec3d6547e397fcbba49a8ccae5f016eb

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3tw.0.exe

Filesize
206KB

MD5
0917be53327ea132956255dcab650a82

SHA1
b60818917f645a8a9af3b530e3ae37c1f002be2f

SHA256
211c34660898480e0777c6ef6f61bf2111f6550e00b40cab859543d567dc455a

SHA512
a72acc24ba813d983bbf2ecab7929d0aab4e25637ae43e85b973a5105429bd15c061415fd855737620caaf81b456b2d6ba57f85566245efbe5f8b5db5560932a

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3tw.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/2448-88-0x000001ADC2980000-0x000001ADC298A000-memory.dmp

Filesize
40KB

Download
memory/2448-94-0x000001ADC2700000-0x000001ADC270C000-memory.dmp

Filesize
48KB

Download
memory/2448-67-0x000001ADBD840000-0x000001ADBD94A000-memory.dmp

Filesize
1.0MB

Download
memory/2448-72-0x000001ADA4E10000-0x000001ADA4E1A000-memory.dmp

Filesize
40KB

Download
memory/2448-96-0x000001ADC2740000-0x000001ADC275E000-memory.dmp

Filesize
120KB

Download
memory/2448-95-0x000001ADC27E0000-0x000001ADC2856000-memory.dmp

Filesize
472KB

Download
memory/2448-85-0x000001ADC2020000-0x000001ADC2058000-memory.dmp

Filesize
224KB

Download
memory/2448-86-0x000001ADC1FF0000-0x000001ADC1FFE000-memory.dmp

Filesize
56KB

Download
memory/2448-91-0x000001ADC2F50000-0x000001ADC3478000-memory.dmp

Filesize
5.2MB

Download
memory/2448-66-0x000001AD9F880000-0x000001ADA30B4000-memory.dmp

Filesize
56.2MB

Download
memory/2448-70-0x000001ADA4DA0000-0x000001ADA4DB4000-memory.dmp

Filesize
80KB

Download
memory/2448-69-0x000001ADA4DB0000-0x000001ADA4DBC000-memory.dmp

Filesize
48KB

Download
memory/2448-71-0x000001ADA4DD0000-0x000001ADA4DF4000-memory.dmp

Filesize
144KB

Download
memory/2448-68-0x000001ADA4D90000-0x000001ADA4DA0000-memory.dmp

Filesize
64KB

Download
memory/2448-74-0x000001ADBDB60000-0x000001ADBDC12000-memory.dmp

Filesize
712KB

Download
memory/2448-75-0x000001ADBDC60000-0x000001ADBDCB0000-memory.dmp

Filesize
320KB

Download
memory/2448-76-0x000001ADBDC10000-0x000001ADBDC32000-memory.dmp

Filesize
136KB

Download
memory/2448-73-0x000001ADBD9A0000-0x000001ADBD9CA000-memory.dmp

Filesize
168KB

Download
memory/2448-89-0x000001ADC29A0000-0x000001ADC2A02000-memory.dmp

Filesize
392KB

Download
memory/2448-90-0x000001ADC2A00000-0x000001ADC2A22000-memory.dmp

Filesize
136KB

Download
memory/2448-81-0x000001ADBDCB0000-0x000001ADBDFB0000-memory.dmp

Filesize
3.0MB

Download
memory/2448-77-0x000001ADA4D70000-0x000001ADA4D7A000-memory.dmp

Filesize
40KB

Download
memory/2448-84-0x000001ADBDC50000-0x000001ADBDC58000-memory.dmp

Filesize
32KB

Download
memory/2448-87-0x000001ADC2010000-0x000001ADC2018000-memory.dmp

Filesize
32KB

Download
memory/4156-36-0x0000000000400000-0x0000000002AF1000-memory.dmp

Filesize
38.9MB

Download
memory/4156-104-0x0000000000400000-0x0000000002AF1000-memory.dmp

Filesize
38.9MB

Download
memory/4156-52-0x0000000000400000-0x0000000002AF1000-memory.dmp

Filesize
38.9MB

Download
memory/4156-100-0x0000000000400000-0x0000000002AF1000-memory.dmp

Filesize
38.9MB

Download
memory/4156-102-0x0000000000400000-0x0000000002AF1000-memory.dmp

Filesize
38.9MB

Download
memory/4156-98-0x0000000000400000-0x0000000002AF1000-memory.dmp

Filesize
38.9MB

Download
memory/4460-65-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4460-53-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4964-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4964-2-0x00000000048F0000-0x000000000495C000-memory.dmp

Filesize
432KB

Download
memory/4964-1-0x0000000002DE0000-0x0000000002EE0000-memory.dmp

Filesize
1024KB

Download
memory/4964-31-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4964-30-0x0000000000400000-0x0000000002B1E000-memory.dmp

Filesize
39.1MB

Download