buer | b67bd7a7c352167da426620126385a34bfa4673efbc8397a1b2d36d6704a9051

Analysis

max time kernel
143s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
01-04-2024 12:45

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

b67bd7a7c352167da426620126385a34bfa4673efbc8397a1b2d36d6704a9051.exe
Size

410KB
MD5

5c0fa38042ee03672a7ad861148e6d88
SHA1

102f15bdc924fd625c7c3f14a25819b119ddc5a9
SHA256

b67bd7a7c352167da426620126385a34bfa4673efbc8397a1b2d36d6704a9051
SHA512

6df23b9f53b37133c227cdf5e6792e44f6ee58a85aedc93e1fa46e9e495a56e3f110f9a24cd6ac4ca062f98089bf56c1e3a52ac8b37c220a2a94e55e5eb28234
SSDEEP

6144:f/BLpm6tS99lyeglUI5rYdpWr9vcQM848uADTqufNZpZzJPWqNX:f/BLpm6slywIpSwhvfM8JuADT9uqNX

Score

10^/10

buer stealc zgrat discovery loader rat spyware stealer

Malware Config

Extracted

Family

stealc

http://185.172.128.209

Attributes

url_path
/3cd2b41cbde8fc9c.php

Signatures

Buer
Buer is a new modular loader first seen in August 2019.
loader buer

Detect ZGRat V1 3 IoCs

resource	yara_rule
behavioral2/memory/4720-167-0x00000232E99B0000-0x00000232ED2A8000-memory.dmp	family_zgrat_v1
behavioral2/memory/4720-169-0x00000232EFB20000-0x00000232EFC30000-memory.dmp	family_zgrat_v1
behavioral2/memory/4720-173-0x00000232EF8F0000-0x00000232EF914000-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 3 IoCs

pid	Process
1580	u11w.0.exe
4912	u11w.1.exe
2892	BFCFBFBFBK.exe

Loads dropped DLL 2 IoCs

pid	Process
1580	u11w.0.exe
1580	u11w.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
3444	1364	WerFault.exe	78
2688	1580	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	u11w.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u11w.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u11w.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	u11w.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u11w.0.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1416	PING.EXE

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1580	u11w.0.exe
1580	u11w.0.exe
1580	u11w.0.exe
1580	u11w.0.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4720	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
4912	u11w.1.exe
4912	u11w.1.exe
4912	u11w.1.exe
4912	u11w.1.exe
4912	u11w.1.exe
4912	u11w.1.exe
4912	u11w.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
4912	u11w.1.exe
4912	u11w.1.exe
4912	u11w.1.exe
4912	u11w.1.exe
4912	u11w.1.exe
4912	u11w.1.exe
4912	u11w.1.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1364 wrote to memory of 1580	1364	b67bd7a7c352167da426620126385a34bfa4673efbc8397a1b2d36d6704a9051.exe	80
PID 1364 wrote to memory of 1580	1364	b67bd7a7c352167da426620126385a34bfa4673efbc8397a1b2d36d6704a9051.exe	80
PID 1364 wrote to memory of 1580	1364	b67bd7a7c352167da426620126385a34bfa4673efbc8397a1b2d36d6704a9051.exe	80
PID 1364 wrote to memory of 4912	1364	b67bd7a7c352167da426620126385a34bfa4673efbc8397a1b2d36d6704a9051.exe	83
PID 1364 wrote to memory of 4912	1364	b67bd7a7c352167da426620126385a34bfa4673efbc8397a1b2d36d6704a9051.exe	83
PID 1364 wrote to memory of 4912	1364	b67bd7a7c352167da426620126385a34bfa4673efbc8397a1b2d36d6704a9051.exe	83
PID 1580 wrote to memory of 4204	1580	u11w.0.exe	88
PID 1580 wrote to memory of 4204	1580	u11w.0.exe	88
PID 1580 wrote to memory of 4204	1580	u11w.0.exe	88
PID 4204 wrote to memory of 2892	4204	cmd.exe	92
PID 4204 wrote to memory of 2892	4204	cmd.exe	92
PID 4204 wrote to memory of 2892	4204	cmd.exe	92
PID 2892 wrote to memory of 4992	2892	BFCFBFBFBK.exe	93
PID 2892 wrote to memory of 4992	2892	BFCFBFBFBK.exe	93
PID 2892 wrote to memory of 4992	2892	BFCFBFBFBK.exe	93
PID 4992 wrote to memory of 1416	4992	cmd.exe	95
PID 4992 wrote to memory of 1416	4992	cmd.exe	95
PID 4992 wrote to memory of 1416	4992	cmd.exe	95
PID 4912 wrote to memory of 4720	4912	u11w.1.exe	96
PID 4912 wrote to memory of 4720	4912	u11w.1.exe	96

C:\Users\Admin\AppData\Local\Temp\b67bd7a7c352167da426620126385a34bfa4673efbc8397a1b2d36d6704a9051.exe
"C:\Users\Admin\AppData\Local\Temp\b67bd7a7c352167da426620126385a34bfa4673efbc8397a1b2d36d6704a9051.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1364
- C:\Users\Admin\AppData\Local\Temp\u11w.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u11w.0.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1580
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\BFCFBFBFBK.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4204
  - - C:\Users\Admin\AppData\Local\Temp\BFCFBFBFBK.exe
      "C:\Users\Admin\AppData\Local\Temp\BFCFBFBFBK.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:2892
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\BFCFBFBFBK.exe
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4992
      - C:\Windows\SysWOW64\PING.EXE
        
        ping 2.2.2.2 -n 1 -w 3000
        6⤵
        Runs ping.exe
        
        PID:1416
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1580 -s 2400
    3⤵
    - Program crash
    PID:2688
- C:\Users\Admin\AppData\Local\Temp\u11w.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u11w.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4912
- - 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:4720
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 1420
  2⤵
  - Program crash
  PID:3444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1364 -ip 1364
1⤵
PID:976

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 1580 -ip 1580
1⤵
PID:3244

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

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

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\BFCFBFBFBK.exe

Filesize
106KB

MD5
fe380780b5c35bd6d54541791151c2be

SHA1
7fe3a583cf91474c733f85cebf3c857682e269e1

SHA256
b64a84d1f88e4e78464a1901c1cb5bbd5f00bb73203d719e64e072157a087b53

SHA512
ba05ba8aa13c4bc1cf98fbf6c08b021e8b19354098e0397fc8e1e5d3dcce367c1063203f24e50d0973193f6535681d0a43486e5dade5d112853b7a2fe8739b6c

Download Submit
C:\Users\Admin\AppData\Local\Temp\u11w.0.exe

Filesize
268KB

MD5
3e1e8709474df25e4c4cbfac47701fc9

SHA1
9845a690f6c10d2d68d39637d46dbc238763501a

SHA256
07d5b5d440312add7ca4b0b55cadaa3770df47e61907e0e3b4c80b4ac775fd54

SHA512
10c66705d847d70c5edd169c9b10c4da94885fb1a94a9c488bf02de39700de5c8709e2bff1c99e26b3393e77c8785977f7e29ff2ba8940417c1495dfe6712bc4

Download Submit
C:\Users\Admin\AppData\Local\Temp\u11w.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1364-78-0x0000000002710000-0x000000000277C000-memory.dmp

Filesize
432KB

Download
memory/1364-76-0x0000000000B30000-0x0000000000C30000-memory.dmp

Filesize
1024KB

Download
memory/1364-58-0x0000000000400000-0x0000000000884000-memory.dmp

Filesize
4.5MB

Download
memory/1364-2-0x0000000002710000-0x000000000277C000-memory.dmp

Filesize
432KB

Download
memory/1364-3-0x0000000000400000-0x0000000000884000-memory.dmp

Filesize
4.5MB

Download
memory/1364-1-0x0000000000B30000-0x0000000000C30000-memory.dmp

Filesize
1024KB

Download
memory/1364-93-0x0000000000400000-0x0000000000884000-memory.dmp

Filesize
4.5MB

Download
memory/1580-14-0x0000000002580000-0x00000000025A7000-memory.dmp

Filesize
156KB

Download
memory/1580-16-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1580-13-0x0000000000960000-0x0000000000A60000-memory.dmp

Filesize
1024KB

Download
memory/1580-75-0x0000000000400000-0x0000000000861000-memory.dmp

Filesize
4.4MB

Download
memory/1580-15-0x0000000000400000-0x0000000000861000-memory.dmp

Filesize
4.4MB

Download
memory/1580-147-0x0000000000960000-0x0000000000A60000-memory.dmp

Filesize
1024KB

Download
memory/1580-150-0x0000000000400000-0x0000000000861000-memory.dmp

Filesize
4.4MB

Download
memory/2892-152-0x0000000071280000-0x0000000071A31000-memory.dmp

Filesize
7.7MB

Download
memory/2892-145-0x0000000000B20000-0x0000000000B40000-memory.dmp

Filesize
128KB

Download
memory/2892-146-0x0000000071280000-0x0000000071A31000-memory.dmp

Filesize
7.7MB

Download
memory/2892-148-0x0000000005730000-0x0000000005740000-memory.dmp

Filesize
64KB

Download
memory/4720-169-0x00000232EFB20000-0x00000232EFC30000-memory.dmp

Filesize
1.1MB

Download
memory/4720-186-0x00000232EFB10000-0x00000232EFB20000-memory.dmp

Filesize
64KB

Download
memory/4720-208-0x00000232EFB10000-0x00000232EFB20000-memory.dmp

Filesize
64KB

Download
memory/4720-166-0x00007FF99AD60000-0x00007FF99B822000-memory.dmp

Filesize
10.8MB

Download
memory/4720-167-0x00000232E99B0000-0x00000232ED2A8000-memory.dmp

Filesize
57.0MB

Download
memory/4720-168-0x00000232EFB10000-0x00000232EFB20000-memory.dmp

Filesize
64KB

Download
memory/4720-206-0x00000232EFB10000-0x00000232EFB20000-memory.dmp

Filesize
64KB

Download
memory/4720-171-0x00000232EF0C0000-0x00000232EF0CC000-memory.dmp

Filesize
48KB

Download
memory/4720-172-0x00000232EF0B0000-0x00000232EF0C4000-memory.dmp

Filesize
80KB

Download
memory/4720-173-0x00000232EF8F0000-0x00000232EF914000-memory.dmp

Filesize
144KB

Download
memory/4720-170-0x00000232EEF30000-0x00000232EEF40000-memory.dmp

Filesize
64KB

Download
memory/4720-174-0x00000232EF920000-0x00000232EF92A000-memory.dmp

Filesize
40KB

Download
memory/4720-178-0x00000232EFE40000-0x00000232EFEA2000-memory.dmp

Filesize
392KB

Download
memory/4720-179-0x00000232EFF20000-0x00000232EFF96000-memory.dmp

Filesize
472KB

Download
memory/4720-180-0x00000232EF090000-0x00000232EF09A000-memory.dmp

Filesize
40KB

Download
memory/4720-184-0x00000232EFFA0000-0x00000232F02A0000-memory.dmp

Filesize
3.0MB

Download
memory/4720-177-0x00000232EFC60000-0x00000232EFCDA000-memory.dmp

Filesize
488KB

Download
memory/4720-176-0x00000232EFA40000-0x00000232EFAF2000-memory.dmp

Filesize
712KB

Download
memory/4720-175-0x00000232EFC30000-0x00000232EFC5A000-memory.dmp

Filesize
168KB

Download
memory/4720-207-0x00000232EFB10000-0x00000232EFB20000-memory.dmp

Filesize
64KB

Download
memory/4720-188-0x00000232EFB10000-0x00000232EFB20000-memory.dmp

Filesize
64KB

Download
memory/4720-187-0x00000232F49A0000-0x00000232F49A8000-memory.dmp

Filesize
32KB

Download
memory/4720-191-0x00000232F42B0000-0x00000232F42BE000-memory.dmp

Filesize
56KB

Download
memory/4720-190-0x00000232F42E0000-0x00000232F4318000-memory.dmp

Filesize
224KB

Download
memory/4720-189-0x00000232EFB10000-0x00000232EFB20000-memory.dmp

Filesize
64KB

Download
memory/4720-192-0x00000232F49B0000-0x00000232F49BA000-memory.dmp

Filesize
40KB

Download
memory/4720-193-0x00000232F4C60000-0x00000232F4C82000-memory.dmp

Filesize
136KB

Download
memory/4720-194-0x00000232F51B0000-0x00000232F56D8000-memory.dmp

Filesize
5.2MB

Download
memory/4720-199-0x00000232F49C0000-0x00000232F49CC000-memory.dmp

Filesize
48KB

Download
memory/4720-198-0x00000232F4A30000-0x00000232F4A80000-memory.dmp

Filesize
320KB

Download
memory/4720-197-0x00000232EFB10000-0x00000232EFB20000-memory.dmp

Filesize
64KB

Download
memory/4720-200-0x00000232F4A80000-0x00000232F4AA2000-memory.dmp

Filesize
136KB

Download
memory/4720-201-0x00000232F4A10000-0x00000232F4A2E000-memory.dmp

Filesize
120KB

Download
memory/4720-203-0x00007FF99AD60000-0x00007FF99B822000-memory.dmp

Filesize
10.8MB

Download
memory/4720-204-0x00000232EFB10000-0x00000232EFB20000-memory.dmp

Filesize
64KB

Download
memory/4720-205-0x00000232EFB10000-0x00000232EFB20000-memory.dmp

Filesize
64KB

Download
memory/4912-162-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4912-77-0x0000000000B90000-0x0000000000B91000-memory.dmp

Filesize
4KB

Download
memory/4912-165-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download