stealc | fb72cbf91f8f821b6089d93b681cf491ebdbe40e4ebdefa42024372325810e12

Analysis

max time kernel
124s
max time network
125s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
08-05-2024 06:52

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General

Target

fb72cbf91f8f821b6089d93b681cf491ebdbe40e4ebdefa42024372325810e12.exe
Size

367KB
MD5

c90428760a8081ea0cc1f8482cd5d957
SHA1

10361e74c70852bf754c36ec4b801a72626af453
SHA256

fb72cbf91f8f821b6089d93b681cf491ebdbe40e4ebdefa42024372325810e12
SHA512

55c2cb510a61b30f1872b46afbf0692231ec5f7d54e005f767b80225e12e22cf96a3dcf899d82aac7c0d605c319f107a5bca5770c986629f221daccecab9b8fd
SSDEEP

6144:Jfvea1snS42x5pK0JcR4DypPotYhIiMuiEIMmH8d/zKXT8g4:Bvea1snS425K0JcRhuNiMEO8pe8g4

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/1980-65-0x0000011267E70000-0x000001126B6A4000-memory.dmp	family_zgrat_v1
behavioral2/memory/1980-66-0x000001126DE40000-0x000001126DF4A000-memory.dmp	family_zgrat_v1
behavioral2/memory/1980-70-0x000001126DE00000-0x000001126DE24000-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
3348	u1hs.0.exe
2052	u1hs.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
1228	1936	WerFault.exe	78
3576	3348	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 enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u1hs.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u1hs.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u1hs.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	u1hs.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u1hs.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3348	u1hs.0.exe
3348	u1hs.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1980	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2052	u1hs.1.exe
2052	u1hs.1.exe
2052	u1hs.1.exe
2052	u1hs.1.exe
2052	u1hs.1.exe
2052	u1hs.1.exe
2052	u1hs.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2052	u1hs.1.exe
2052	u1hs.1.exe
2052	u1hs.1.exe
2052	u1hs.1.exe
2052	u1hs.1.exe
2052	u1hs.1.exe
2052	u1hs.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1936 wrote to memory of 3348	1936	fb72cbf91f8f821b6089d93b681cf491ebdbe40e4ebdefa42024372325810e12.exe	80
PID 1936 wrote to memory of 3348	1936	fb72cbf91f8f821b6089d93b681cf491ebdbe40e4ebdefa42024372325810e12.exe	80
PID 1936 wrote to memory of 3348	1936	fb72cbf91f8f821b6089d93b681cf491ebdbe40e4ebdefa42024372325810e12.exe	80
PID 1936 wrote to memory of 2052	1936	fb72cbf91f8f821b6089d93b681cf491ebdbe40e4ebdefa42024372325810e12.exe	83
PID 1936 wrote to memory of 2052	1936	fb72cbf91f8f821b6089d93b681cf491ebdbe40e4ebdefa42024372325810e12.exe	83
PID 1936 wrote to memory of 2052	1936	fb72cbf91f8f821b6089d93b681cf491ebdbe40e4ebdefa42024372325810e12.exe	83
PID 2052 wrote to memory of 1980	2052	u1hs.1.exe	89
PID 2052 wrote to memory of 1980	2052	u1hs.1.exe	89

C:\Users\Admin\AppData\Local\Temp\fb72cbf91f8f821b6089d93b681cf491ebdbe40e4ebdefa42024372325810e12.exe
"C:\Users\Admin\AppData\Local\Temp\fb72cbf91f8f821b6089d93b681cf491ebdbe40e4ebdefa42024372325810e12.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1936
- C:\Users\Admin\AppData\Local\Temp\u1hs.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u1hs.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3348
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3348 -s 1380
    3⤵
    - Program crash
    PID:3576
- C:\Users\Admin\AppData\Local\Temp\u1hs.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u1hs.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2052
- - 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:1980
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1936 -s 1540
  2⤵
  - Program crash
  PID:1228

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1936 -ip 1936
1⤵
PID:1868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3348 -ip 3348
1⤵
PID:1056

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
0c2c809615b7529a4db0558e723aa08a

SHA1
cd9864dd0a48901ee77025d763730f186898895d

SHA256
717f495fcc66d893ad2c97dee85ce2c4be88722e59aad742f90e0347006b37ad

SHA512
292252476584ab2eeb0d72156377d27f6db7137026b892acd21801978041e29eae11dc0ab23b5ae1e3399a28623e26e441af8d3ef602297003ac1059d40f0b2f

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1hs.0.exe

Filesize
226KB

MD5
6891c527d4d65692716c149981e770ff

SHA1
ac4ba0be44795c437f860d710bdd0e3157d17caf

SHA256
b37a558c37740094e51a1b04fa05280e3f28b2592f5881d96ae5f5a05e2c5902

SHA512
1195f321c53df745aec5350e606293507f89e8f3dce3b1c58244f6a6eb9de5cdacdc222960663f7b3e03be69804bbbf8905764c2d1a21dc745e21edba9112e15

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1hs.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1936-29-0x0000000000400000-0x0000000001A26000-memory.dmp

Filesize
22.1MB

Download
memory/1936-2-0x00000000037A0000-0x000000000380C000-memory.dmp

Filesize
432KB

Download
memory/1936-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/1936-1-0x0000000001C30000-0x0000000001D30000-memory.dmp

Filesize
1024KB

Download
memory/1936-30-0x00000000037A0000-0x000000000380C000-memory.dmp

Filesize
432KB

Download
memory/1936-31-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/1980-86-0x0000011272F70000-0x0000011272F7A000-memory.dmp

Filesize
40KB

Download
memory/1980-76-0x000001126D420000-0x000001126D42A000-memory.dmp

Filesize
40KB

Download
memory/1980-94-0x0000011272D50000-0x0000011272D6E000-memory.dmp

Filesize
120KB

Download
memory/1980-93-0x0000011272DF0000-0x0000011272E66000-memory.dmp

Filesize
472KB

Download
memory/1980-65-0x0000011267E70000-0x000001126B6A4000-memory.dmp

Filesize
56.2MB

Download
memory/1980-66-0x000001126DE40000-0x000001126DF4A000-memory.dmp

Filesize
1.0MB

Download
memory/1980-68-0x000001126DDA0000-0x000001126DDAC000-memory.dmp

Filesize
48KB

Download
memory/1980-67-0x000001126DC80000-0x000001126DC90000-memory.dmp

Filesize
64KB

Download
memory/1980-69-0x000001126DD90000-0x000001126DDA4000-memory.dmp

Filesize
80KB

Download
memory/1980-70-0x000001126DE00000-0x000001126DE24000-memory.dmp

Filesize
144KB

Download
memory/1980-71-0x000001126E0A0000-0x000001126E0AA000-memory.dmp

Filesize
40KB

Download
memory/1980-72-0x000001126E0D0000-0x000001126E182000-memory.dmp

Filesize
712KB

Download
memory/1980-73-0x000001126E190000-0x000001126E1BA000-memory.dmp

Filesize
168KB

Download
memory/1980-74-0x000001126E210000-0x000001126E260000-memory.dmp

Filesize
320KB

Download
memory/1980-75-0x000001126E260000-0x000001126E282000-memory.dmp

Filesize
136KB

Download
memory/1980-92-0x0000011272D10000-0x0000011272D1C000-memory.dmp

Filesize
48KB

Download
memory/1980-80-0x000001126E290000-0x000001126E590000-memory.dmp

Filesize
3.0MB

Download
memory/1980-82-0x0000011271F50000-0x0000011271F58000-memory.dmp

Filesize
32KB

Download
memory/1980-83-0x0000011272660000-0x0000011272698000-memory.dmp

Filesize
224KB

Download
memory/1980-84-0x0000011272620000-0x000001127262E000-memory.dmp

Filesize
56KB

Download
memory/1980-85-0x0000011272640000-0x0000011272648000-memory.dmp

Filesize
32KB

Download
memory/1980-89-0x0000011273520000-0x0000011273A48000-memory.dmp

Filesize
5.2MB

Download
memory/1980-87-0x0000011272F90000-0x0000011272FF2000-memory.dmp

Filesize
392KB

Download
memory/1980-88-0x0000011272CF0000-0x0000011272D12000-memory.dmp

Filesize
136KB

Download
memory/2052-52-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2052-64-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3348-13-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3348-14-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3348-97-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3348-100-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3348-102-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3348-104-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download