89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33

General

Target

89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe
Size

636KB
MD5

c9ffc3cf9644b18d3b9177f3538d5777
SHA1

4b07b514e46bdc9d1b7a4d141972390db368b5f0
SHA256

89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33
SHA512

8c79fe2a251d2baa6b2d7eb8bbc99ea8112e44e4cabf8083cb3a762b03cc75c635927f2652ea48aaa2f2d57d1b472a612157c897c660f5e5efa6991396031109
SSDEEP

12288:P3N7+8qyRWMzSfXPzwDevratVILPqbP/E:PkRp4Snz7atVpP

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,\"C:\\Windows\\system32\\clientsvr.exe\""	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe

Drops file in Drivers directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	system.exe
File opened for modification	C:\Windows\system32\drivers\etc\hosts	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe

Executes dropped EXE 3 IoCs

pid	Process
3992	system.exe
5096	system.exe
456	system.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\clientsvr.exe	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 420 set thread context of 3484	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	89
PID 3992 set thread context of 456	3992	system.exe	98

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe
420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe
420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe
420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe
420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe
420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe
3992	system.exe
3992	system.exe
3992	system.exe
3992	system.exe
3992	system.exe
3992	system.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe
Token: SeDebugPrivilege	3992	system.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3484	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 420 wrote to memory of 2940	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	88
PID 420 wrote to memory of 2940	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	88
PID 420 wrote to memory of 2940	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	88
PID 420 wrote to memory of 3484	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	89
PID 420 wrote to memory of 3484	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	89
PID 420 wrote to memory of 3484	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	89
PID 420 wrote to memory of 3484	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	89
PID 420 wrote to memory of 3484	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	89
PID 420 wrote to memory of 3484	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	89
PID 420 wrote to memory of 3484	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	89
PID 420 wrote to memory of 3484	420	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	89
PID 3484 wrote to memory of 3992	3484	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	95
PID 3484 wrote to memory of 3992	3484	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	95
PID 3484 wrote to memory of 3992	3484	89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe	95
PID 3992 wrote to memory of 5096	3992	system.exe	97
PID 3992 wrote to memory of 5096	3992	system.exe	97
PID 3992 wrote to memory of 5096	3992	system.exe	97
PID 3992 wrote to memory of 456	3992	system.exe	98
PID 3992 wrote to memory of 456	3992	system.exe	98
PID 3992 wrote to memory of 456	3992	system.exe	98
PID 3992 wrote to memory of 456	3992	system.exe	98
PID 3992 wrote to memory of 456	3992	system.exe	98
PID 3992 wrote to memory of 456	3992	system.exe	98
PID 3992 wrote to memory of 456	3992	system.exe	98
PID 3992 wrote to memory of 456	3992	system.exe	98

C:\Users\Admin\AppData\Local\Temp\89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe
"C:\Users\Admin\AppData\Local\Temp\89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:420
- C:\Users\Admin\AppData\Local\Temp\89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe
  "C:\Users\Admin\AppData\Local\Temp\89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe"
  2⤵
  PID:2940
- C:\Users\Admin\AppData\Local\Temp\89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe
  "C:\Users\Admin\AppData\Local\Temp\89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks computer location settings
  - Drops file in System32 directory
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3484
- - C:\ProgramData\502970\system.exe
    "C:\ProgramData\502970\system.exe"
    3⤵
    - Drops file in Drivers directory
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3992
  - - C:\ProgramData\502970\system.exe
      "C:\ProgramData\502970\system.exe"
      4⤵
      Executes dropped EXE
      PID:5096
  - - C:\ProgramData\502970\system.exe
      "C:\ProgramData\502970\system.exe"
      4⤵
      Executes dropped EXE
      PID:456

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\502970\system.exe

Filesize
636KB

MD5
c9ffc3cf9644b18d3b9177f3538d5777

SHA1
4b07b514e46bdc9d1b7a4d141972390db368b5f0

SHA256
89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33

SHA512
8c79fe2a251d2baa6b2d7eb8bbc99ea8112e44e4cabf8083cb3a762b03cc75c635927f2652ea48aaa2f2d57d1b472a612157c897c660f5e5efa6991396031109

Download Submit
C:\ProgramData\502970\system.exe

Filesize
636KB

MD5
c9ffc3cf9644b18d3b9177f3538d5777

SHA1
4b07b514e46bdc9d1b7a4d141972390db368b5f0

SHA256
89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33

SHA512
8c79fe2a251d2baa6b2d7eb8bbc99ea8112e44e4cabf8083cb3a762b03cc75c635927f2652ea48aaa2f2d57d1b472a612157c897c660f5e5efa6991396031109

Download Submit
C:\ProgramData\502970\system.exe

Filesize
636KB

MD5
c9ffc3cf9644b18d3b9177f3538d5777

SHA1
4b07b514e46bdc9d1b7a4d141972390db368b5f0

SHA256
89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33

SHA512
8c79fe2a251d2baa6b2d7eb8bbc99ea8112e44e4cabf8083cb3a762b03cc75c635927f2652ea48aaa2f2d57d1b472a612157c897c660f5e5efa6991396031109

Download Submit
C:\ProgramData\502970\system.exe

Filesize
636KB

MD5
c9ffc3cf9644b18d3b9177f3538d5777

SHA1
4b07b514e46bdc9d1b7a4d141972390db368b5f0

SHA256
89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33

SHA512
8c79fe2a251d2baa6b2d7eb8bbc99ea8112e44e4cabf8083cb3a762b03cc75c635927f2652ea48aaa2f2d57d1b472a612157c897c660f5e5efa6991396031109

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\89e8dbf09685f9de65e186fd7487374b7f081dbbbca86360a9047fb334235c33.exe.log

Filesize
400B

MD5
0a9b4592cd49c3c21f6767c2dabda92f

SHA1
f534297527ae5ccc0ecb2221ddeb8e58daeb8b74

SHA256
c7effe9cb81a70d738dee863991afefab040290d4c4b78b4202383bcb9f88fcd

SHA512
6b878df474e5bbfb8e9e265f15a76560c2ef151dcebc6388c82d7f6f86ffaf83f5ade5a09f1842e493cb6c8fd63b0b88d088c728fd725f7139f965a5ee332307

Download Submit
C:\Windows\system32\drivers\etc\hosts

Filesize
2KB

MD5
1cca24ab81c8b433dbf256fb95564a26

SHA1
565b8147705862cb0fff85591a48a9fa6859dc31

SHA256
ca9af0bb473d3b51f7b47ddbd7ee75e8e88342ba35e169f3cd1666bf9176215a

SHA512
3bc3179fcc8e74da763a42401fa8e99d33a1181fda8f8695c4394a2bcc54690dd85b9d4b9ea59bfc7ddfbd6f1f055179bf79a93919d1e384e16f28029ea3e839

Download Submit
memory/420-139-0x0000000075410000-0x00000000759C1000-memory.dmp

Filesize
5.7MB

Download
memory/420-132-0x0000000075410000-0x00000000759C1000-memory.dmp

Filesize
5.7MB

Download
memory/420-133-0x0000000075410000-0x00000000759C1000-memory.dmp

Filesize
5.7MB

Download
memory/456-154-0x0000000075410000-0x00000000759C1000-memory.dmp

Filesize
5.7MB

Download
memory/456-153-0x0000000075410000-0x00000000759C1000-memory.dmp

Filesize
5.7MB

Download
memory/3484-138-0x0000000075410000-0x00000000759C1000-memory.dmp

Filesize
5.7MB

Download
memory/3484-140-0x0000000075410000-0x00000000759C1000-memory.dmp

Filesize
5.7MB

Download
memory/3484-136-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/3992-152-0x0000000075410000-0x00000000759C1000-memory.dmp

Filesize
5.7MB

Download
memory/3992-145-0x0000000075410000-0x00000000759C1000-memory.dmp

Filesize
5.7MB

Download
memory/3992-144-0x0000000075410000-0x00000000759C1000-memory.dmp

Filesize
5.7MB

Download

Analysis

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