91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc

Analysis

max time kernel
169s
max time network
177s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
03/12/2022, 17:40

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General

Target

91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
Size

66KB
MD5

f35b337bf4ab8ad26f7d604c1e245ac1
SHA1

8ccfc856c08e793dd246c04a1ad56a755cdb3f3c
SHA256

91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc
SHA512

4080baa290c199ad93bd225e4a4425fb834b6d3a3bc5b90910ceabefdf3ea67075bf2526c956f4f46eb8f54fbf1833e4f2f2c1eb98c84912e5918ce86101431f
SSDEEP

1536:zl6Vzn+KzyMCo0UtGuG/h2elhSBBBBBBBBBBBBBBMKVBBBBBBBB+BBBBBBBBBBBM:0qKVCoHtGB/w9Sh9cTwry

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies firewall policy service 2 TTPs 4 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\M-1-52-5782-8754-5245\winsrv.exe = "C:\\Users\\Admin\\M-1-52-5782-8754-5245\\winsrv.exe:*:Enabled:Microsoft® Windows System"	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe

Executes dropped EXE 3 IoCs

pid	Process
660	winsrv.exe
4128	winsrv.exe
3296	winsrv.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe

Loads dropped DLL 2 IoCs

pid	Process
5032	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
660	winsrv.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft® Windows System = "C:\\Users\\Admin\\M-1-52-5782-8754-5245\\winsrv.exe"	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 5032 set thread context of 1744	5032	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	80
PID 1744 set thread context of 4944	1744	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	81
PID 660 set thread context of 4128	660	winsrv.exe	83
PID 4128 set thread context of 3296	4128	winsrv.exe	84

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 5032 wrote to memory of 1744	5032	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	80
PID 5032 wrote to memory of 1744	5032	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	80
PID 5032 wrote to memory of 1744	5032	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	80
PID 5032 wrote to memory of 1744	5032	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	80
PID 5032 wrote to memory of 1744	5032	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	80
PID 5032 wrote to memory of 1744	5032	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	80
PID 5032 wrote to memory of 1744	5032	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	80
PID 5032 wrote to memory of 1744	5032	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	80
PID 5032 wrote to memory of 1744	5032	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	80
PID 1744 wrote to memory of 4944	1744	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	81
PID 1744 wrote to memory of 4944	1744	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	81
PID 1744 wrote to memory of 4944	1744	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	81
PID 1744 wrote to memory of 4944	1744	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	81
PID 1744 wrote to memory of 4944	1744	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	81
PID 1744 wrote to memory of 4944	1744	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	81
PID 1744 wrote to memory of 4944	1744	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	81
PID 1744 wrote to memory of 4944	1744	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	81
PID 1744 wrote to memory of 4944	1744	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	81
PID 1744 wrote to memory of 4944	1744	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	81
PID 4944 wrote to memory of 660	4944	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	82
PID 4944 wrote to memory of 660	4944	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	82
PID 4944 wrote to memory of 660	4944	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	82
PID 660 wrote to memory of 4128	660	winsrv.exe	83
PID 660 wrote to memory of 4128	660	winsrv.exe	83
PID 660 wrote to memory of 4128	660	winsrv.exe	83
PID 660 wrote to memory of 4128	660	winsrv.exe	83
PID 660 wrote to memory of 4128	660	winsrv.exe	83
PID 660 wrote to memory of 4128	660	winsrv.exe	83
PID 660 wrote to memory of 4128	660	winsrv.exe	83
PID 660 wrote to memory of 4128	660	winsrv.exe	83
PID 660 wrote to memory of 4128	660	winsrv.exe	83
PID 4128 wrote to memory of 3296	4128	winsrv.exe	84
PID 4128 wrote to memory of 3296	4128	winsrv.exe	84
PID 4128 wrote to memory of 3296	4128	winsrv.exe	84
PID 4128 wrote to memory of 3296	4128	winsrv.exe	84
PID 4128 wrote to memory of 3296	4128	winsrv.exe	84
PID 4128 wrote to memory of 3296	4128	winsrv.exe	84
PID 4128 wrote to memory of 3296	4128	winsrv.exe	84
PID 4128 wrote to memory of 3296	4128	winsrv.exe	84
PID 4128 wrote to memory of 3296	4128	winsrv.exe	84
PID 4128 wrote to memory of 3296	4128	winsrv.exe	84

C:\Users\Admin\AppData\Local\Temp\91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
"C:\Users\Admin\AppData\Local\Temp\91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5032
- C:\Users\Admin\AppData\Local\Temp\91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
  "C:\Users\Admin\AppData\Local\Temp\91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1744
- - C:\Users\Admin\AppData\Local\Temp\91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
    "C:\Users\Admin\AppData\Local\Temp\91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe"
    3⤵
    - Modifies firewall policy service
    - Checks computer location settings
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:4944
  - - C:\Users\Admin\M-1-52-5782-8754-5245\winsrv.exe
      "C:\Users\Admin\M-1-52-5782-8754-5245\winsrv.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:660
    - - C:\Users\Admin\M-1-52-5782-8754-5245\winsrv.exe
        
        "C:\Users\Admin\M-1-52-5782-8754-5245\winsrv.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:4128
      - C:\Users\Admin\M-1-52-5782-8754-5245\winsrv.exe
        
        "C:\Users\Admin\M-1-52-5782-8754-5245\winsrv.exe"
        6⤵
        Executes dropped EXE
        
        PID:3296

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

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\POSITION4DLLNAME.txt

Filesize
2KB

MD5
b146b3da4e50cdbb10d418ccb8279fc6

SHA1
8d31520b964935f6f91dcc5c8efc3ab3d6792597

SHA256
a5a7fef4f6ad1c2d0f299cafdc686974060512e6852bd4b8cba32f6a907a65f4

SHA512
f92ad30eb7bfac9e172af1701125db56f58f251b8c45fb53ba61bf97ba94a95e54f395f2485c006fb9c60fb4578a0fb6aa1406c35eefa7f096371c0d46fd7101

Download Submit
C:\Users\Admin\AppData\Local\Temp\POSITION4DLLNAME.txt

Filesize
2KB

MD5
b146b3da4e50cdbb10d418ccb8279fc6

SHA1
8d31520b964935f6f91dcc5c8efc3ab3d6792597

SHA256
a5a7fef4f6ad1c2d0f299cafdc686974060512e6852bd4b8cba32f6a907a65f4

SHA512
f92ad30eb7bfac9e172af1701125db56f58f251b8c45fb53ba61bf97ba94a95e54f395f2485c006fb9c60fb4578a0fb6aa1406c35eefa7f096371c0d46fd7101

Download Submit
C:\Users\Admin\AppData\Local\Temp\POSITION4DLLNAME.txt

Filesize
2KB

MD5
b146b3da4e50cdbb10d418ccb8279fc6

SHA1
8d31520b964935f6f91dcc5c8efc3ab3d6792597

SHA256
a5a7fef4f6ad1c2d0f299cafdc686974060512e6852bd4b8cba32f6a907a65f4

SHA512
f92ad30eb7bfac9e172af1701125db56f58f251b8c45fb53ba61bf97ba94a95e54f395f2485c006fb9c60fb4578a0fb6aa1406c35eefa7f096371c0d46fd7101

Download Submit
C:\Users\Admin\M-1-52-5782-8754-5245\winsrv.exe

Filesize
66KB

MD5
f35b337bf4ab8ad26f7d604c1e245ac1

SHA1
8ccfc856c08e793dd246c04a1ad56a755cdb3f3c

SHA256
91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc

SHA512
4080baa290c199ad93bd225e4a4425fb834b6d3a3bc5b90910ceabefdf3ea67075bf2526c956f4f46eb8f54fbf1833e4f2f2c1eb98c84912e5918ce86101431f

Download Submit
C:\Users\Admin\M-1-52-5782-8754-5245\winsrv.exe

Filesize
66KB

MD5
f35b337bf4ab8ad26f7d604c1e245ac1

SHA1
8ccfc856c08e793dd246c04a1ad56a755cdb3f3c

SHA256
91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc

SHA512
4080baa290c199ad93bd225e4a4425fb834b6d3a3bc5b90910ceabefdf3ea67075bf2526c956f4f46eb8f54fbf1833e4f2f2c1eb98c84912e5918ce86101431f

Download Submit
C:\Users\Admin\M-1-52-5782-8754-5245\winsrv.exe

Filesize
66KB

MD5
f35b337bf4ab8ad26f7d604c1e245ac1

SHA1
8ccfc856c08e793dd246c04a1ad56a755cdb3f3c

SHA256
91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc

SHA512
4080baa290c199ad93bd225e4a4425fb834b6d3a3bc5b90910ceabefdf3ea67075bf2526c956f4f46eb8f54fbf1833e4f2f2c1eb98c84912e5918ce86101431f

Download Submit
C:\Users\Admin\M-1-52-5782-8754-5245\winsrv.exe

Filesize
66KB

MD5
f35b337bf4ab8ad26f7d604c1e245ac1

SHA1
8ccfc856c08e793dd246c04a1ad56a755cdb3f3c

SHA256
91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc

SHA512
4080baa290c199ad93bd225e4a4425fb834b6d3a3bc5b90910ceabefdf3ea67075bf2526c956f4f46eb8f54fbf1833e4f2f2c1eb98c84912e5918ce86101431f

Download Submit
memory/1744-143-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1744-137-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1744-136-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1744-134-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/4128-159-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/4944-142-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/4944-141-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/4944-139-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads