stealc | 6bdc6aed6cdde3623f6685971a1b631e2a7be6763afa3daf40cfc511d19dacfe

Analysis

max time kernel
146s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10-05-2024 19:24

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General

Target

6bdc6aed6cdde3623f6685971a1b631e2a7be6763afa3daf40cfc511d19dacfe.exe
Size

373KB
MD5

fb90d078448927e4127363be0b7e0973
SHA1

de83fcc183e8e428b6fb10cf9d13d8c1c0e5477a
SHA256

6bdc6aed6cdde3623f6685971a1b631e2a7be6763afa3daf40cfc511d19dacfe
SHA512

fe033ad0e8dce2efdeab47e06c2b09f77ea95969b1a555bfba96fe47e08347539ee7688401068574aefb19a8930f3f5a6c9816cc0d9e3c4be03bc0e3756edaba
SSDEEP

6144:DK2ul+mZXWya9UFvz+7bqk8nhiA6YfftkMgxhwt6XC35kPyM33TCIFbv:DK2ulHZmL9UF7DhiL4lqaj35kTJVv

Score

10^/10

stealc zgrat discovery rat spyware 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
behavioral1/memory/4236-98-0x0000020B50240000-0x0000020B53A74000-memory.dmp	family_zgrat_v1
behavioral1/memory/4236-106-0x0000020B6E520000-0x0000020B6E62A000-memory.dmp	family_zgrat_v1
behavioral1/memory/4236-110-0x0000020B55870000-0x0000020B55894000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	6bdc6aed6cdde3623f6685971a1b631e2a7be6763afa3daf40cfc511d19dacfe.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	u36k.1.exe

Executes dropped EXE 2 IoCs

pid	Process
2068	u36k.0.exe
4992	u36k.1.exe

Loads dropped DLL 2 IoCs

pid	Process
2068	u36k.0.exe
2068	u36k.0.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
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
4148	4124	WerFault.exe	81
4460	2068	WerFault.exe	91

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	u36k.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u36k.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u36k.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	u36k.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u36k.0.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2068	u36k.0.exe
2068	u36k.0.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
4992	u36k.1.exe
4992	u36k.1.exe
4992	u36k.1.exe
4992	u36k.1.exe
4992	u36k.1.exe
4992	u36k.1.exe
4992	u36k.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
4992	u36k.1.exe
4992	u36k.1.exe
4992	u36k.1.exe
4992	u36k.1.exe
4992	u36k.1.exe
4992	u36k.1.exe
4992	u36k.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4124 wrote to memory of 2068	4124	6bdc6aed6cdde3623f6685971a1b631e2a7be6763afa3daf40cfc511d19dacfe.exe	91
PID 4124 wrote to memory of 2068	4124	6bdc6aed6cdde3623f6685971a1b631e2a7be6763afa3daf40cfc511d19dacfe.exe	91
PID 4124 wrote to memory of 2068	4124	6bdc6aed6cdde3623f6685971a1b631e2a7be6763afa3daf40cfc511d19dacfe.exe	91
PID 4124 wrote to memory of 4992	4124	6bdc6aed6cdde3623f6685971a1b631e2a7be6763afa3daf40cfc511d19dacfe.exe	93
PID 4124 wrote to memory of 4992	4124	6bdc6aed6cdde3623f6685971a1b631e2a7be6763afa3daf40cfc511d19dacfe.exe	93
PID 4124 wrote to memory of 4992	4124	6bdc6aed6cdde3623f6685971a1b631e2a7be6763afa3daf40cfc511d19dacfe.exe	93
PID 4992 wrote to memory of 4236	4992	u36k.1.exe	102
PID 4992 wrote to memory of 4236	4992	u36k.1.exe	102

C:\Users\Admin\AppData\Local\Temp\6bdc6aed6cdde3623f6685971a1b631e2a7be6763afa3daf40cfc511d19dacfe.exe
"C:\Users\Admin\AppData\Local\Temp\6bdc6aed6cdde3623f6685971a1b631e2a7be6763afa3daf40cfc511d19dacfe.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4124
- C:\Users\Admin\AppData\Local\Temp\u36k.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u36k.0.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2068
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2068 -s 2364
    3⤵
    - Program crash
    PID:4460
- C:\Users\Admin\AppData\Local\Temp\u36k.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u36k.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:4992
- - 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:4236
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4124 -s 1428
  2⤵
  - Program crash
  PID:4148

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4124 -ip 4124
1⤵
PID:4008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 2068 -ip 2068
1⤵
PID:528

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Are.docx

Filesize
11KB

MD5
a33e5b189842c5867f46566bdbf7a095

SHA1
e1c06359f6a76da90d19e8fd95e79c832edb3196

SHA256
5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454

SHA512
f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b

Download Submit
C:\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
C:\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
C:\Users\Admin\AppData\Local\Temp\iolo\dm\ioloDMLog.txt

Filesize
2KB

MD5
86ab0038f8c74a75161889914bf0a116

SHA1
4d2822ec377d64b583ad3015cacf9133e171df35

SHA256
ff7a5bac0ffcd8eac8d3ce2d273e028f3033bc1b426be81e5ca15bc62f2988bb

SHA512
fef810a4167805ccc5d9bce0a83257b7a1f4592ce15f087a4c2bdec646a66d5599a6c40f74fa346acc713116220b82f3ee967c9a241e12415d13eca6d40e6444

Download Submit
C:\Users\Admin\AppData\Local\Temp\u36k.0.exe

Filesize
231KB

MD5
90f9f97c4296b827df58180287f86b04

SHA1
591461d9aa9ecbc23d37f34bb8208fd68cd4dd07

SHA256
28cb8c1d64da50157b1cee0f85ecbb3bea6568cf4aa2c062dd437185b2cb8d0d

SHA512
15eab19013a48d473ddd34f4a2dc11676aa2da8d3abe2f73b461753f302ef631dc6da9aa13e7b568fb492b7870497328eb3fe2e5f7b3cfe7d2ec902bd6c34cff

Download Submit
C:\Users\Admin\AppData\Local\Temp\u36k.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/2068-43-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/2068-32-0x0000000000400000-0x0000000002576000-memory.dmp

Filesize
33.5MB

Download
memory/2068-33-0x00007FFCD9050000-0x00007FFCD9245000-memory.dmp

Filesize
2.0MB

Download
memory/2068-168-0x0000000000400000-0x0000000002576000-memory.dmp

Filesize
33.5MB

Download
memory/2068-169-0x00007FFCD9050000-0x00007FFCD9245000-memory.dmp

Filesize
2.0MB

Download
memory/2068-99-0x0000000000400000-0x0000000002576000-memory.dmp

Filesize
33.5MB

Download
memory/4124-26-0x0000000000400000-0x0000000002599000-memory.dmp

Filesize
33.6MB

Download
memory/4124-27-0x00007FFCD9050000-0x00007FFCD9245000-memory.dmp

Filesize
2.0MB

Download
memory/4124-2-0x00007FFCD9050000-0x00007FFCD9245000-memory.dmp

Filesize
2.0MB

Download
memory/4124-1-0x0000000000400000-0x0000000002599000-memory.dmp

Filesize
33.6MB

Download
memory/4236-147-0x0000020B72B10000-0x0000020B72B1E000-memory.dmp

Filesize
56KB

Download
memory/4236-146-0x0000020B72B50000-0x0000020B72B88000-memory.dmp

Filesize
224KB

Download
memory/4236-110-0x0000020B55870000-0x0000020B55894000-memory.dmp

Filesize
144KB

Download
memory/4236-107-0x0000020B53EB0000-0x0000020B53EC0000-memory.dmp

Filesize
64KB

Download
memory/4236-108-0x0000020B55810000-0x0000020B5581C000-memory.dmp

Filesize
48KB

Download
memory/4236-131-0x0000020B558A0000-0x0000020B558AA000-memory.dmp

Filesize
40KB

Download
memory/4236-132-0x0000020B6E1D0000-0x0000020B6E1FA000-memory.dmp

Filesize
168KB

Download
memory/4236-133-0x0000020B6E440000-0x0000020B6E4F2000-memory.dmp

Filesize
712KB

Download
memory/4236-134-0x0000020B6E7C0000-0x0000020B6E810000-memory.dmp

Filesize
320KB

Download
memory/4236-138-0x0000020B6E770000-0x0000020B6E792000-memory.dmp

Filesize
136KB

Download
memory/4236-139-0x0000020B558B0000-0x0000020B558BA000-memory.dmp

Filesize
40KB

Download
memory/4236-143-0x0000020B6E810000-0x0000020B6EB10000-memory.dmp

Filesize
3.0MB

Download
memory/4236-145-0x0000020B6E7B0000-0x0000020B6E7B8000-memory.dmp

Filesize
32KB

Download
memory/4236-109-0x0000020B55800000-0x0000020B55814000-memory.dmp

Filesize
80KB

Download
memory/4236-106-0x0000020B6E520000-0x0000020B6E62A000-memory.dmp

Filesize
1.0MB

Download
memory/4236-148-0x0000020B72B30000-0x0000020B72B38000-memory.dmp

Filesize
32KB

Download
memory/4236-149-0x0000020B72BC0000-0x0000020B72BCA000-memory.dmp

Filesize
40KB

Download
memory/4236-150-0x0000020B73CC0000-0x0000020B73D22000-memory.dmp

Filesize
392KB

Download
memory/4236-151-0x0000020B73A30000-0x0000020B73A52000-memory.dmp

Filesize
136KB

Download
memory/4236-152-0x0000020B74250000-0x0000020B74778000-memory.dmp

Filesize
5.2MB

Download
memory/4236-155-0x0000020B73A50000-0x0000020B73A5C000-memory.dmp

Filesize
48KB

Download
memory/4236-156-0x0000020B73B30000-0x0000020B73BA6000-memory.dmp

Filesize
472KB

Download
memory/4236-98-0x0000020B50240000-0x0000020B53A74000-memory.dmp

Filesize
56.2MB

Download
memory/4236-165-0x0000020B73A90000-0x0000020B73AAE000-memory.dmp

Filesize
120KB

Download
memory/4236-170-0x0000020B6DFB0000-0x0000020B6E0CF000-memory.dmp

Filesize
1.1MB

Download
memory/4992-94-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4992-97-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download