91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc

Analysis

max time kernel
151s
max time network
48s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-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 2 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
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
1584	winsrv.exe
1276	winsrv.exe
1412	winsrv.exe

Loads dropped DLL 4 IoCs

pid	Process
1600	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
1752	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
1752	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
1584	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-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\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 1600 set thread context of 988	1600	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	27
PID 988 set thread context of 1752	988	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	28
PID 1584 set thread context of 1276	1584	winsrv.exe	30
PID 1276 set thread context of 1412	1276	winsrv.exe	31

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 1600 wrote to memory of 988	1600	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	27
PID 1600 wrote to memory of 988	1600	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	27
PID 1600 wrote to memory of 988	1600	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	27
PID 1600 wrote to memory of 988	1600	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	27
PID 1600 wrote to memory of 988	1600	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	27
PID 1600 wrote to memory of 988	1600	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	27
PID 1600 wrote to memory of 988	1600	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	27
PID 1600 wrote to memory of 988	1600	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	27
PID 1600 wrote to memory of 988	1600	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	27
PID 1600 wrote to memory of 988	1600	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	27
PID 988 wrote to memory of 1752	988	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	28
PID 988 wrote to memory of 1752	988	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	28
PID 988 wrote to memory of 1752	988	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	28
PID 988 wrote to memory of 1752	988	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	28
PID 988 wrote to memory of 1752	988	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	28
PID 988 wrote to memory of 1752	988	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	28
PID 988 wrote to memory of 1752	988	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	28
PID 988 wrote to memory of 1752	988	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	28
PID 988 wrote to memory of 1752	988	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	28
PID 988 wrote to memory of 1752	988	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	28
PID 988 wrote to memory of 1752	988	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	28
PID 1752 wrote to memory of 1584	1752	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	29
PID 1752 wrote to memory of 1584	1752	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	29
PID 1752 wrote to memory of 1584	1752	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	29
PID 1752 wrote to memory of 1584	1752	91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe	29
PID 1584 wrote to memory of 1276	1584	winsrv.exe	30
PID 1584 wrote to memory of 1276	1584	winsrv.exe	30
PID 1584 wrote to memory of 1276	1584	winsrv.exe	30
PID 1584 wrote to memory of 1276	1584	winsrv.exe	30
PID 1584 wrote to memory of 1276	1584	winsrv.exe	30
PID 1584 wrote to memory of 1276	1584	winsrv.exe	30
PID 1584 wrote to memory of 1276	1584	winsrv.exe	30
PID 1584 wrote to memory of 1276	1584	winsrv.exe	30
PID 1584 wrote to memory of 1276	1584	winsrv.exe	30
PID 1584 wrote to memory of 1276	1584	winsrv.exe	30
PID 1276 wrote to memory of 1412	1276	winsrv.exe	31
PID 1276 wrote to memory of 1412	1276	winsrv.exe	31
PID 1276 wrote to memory of 1412	1276	winsrv.exe	31
PID 1276 wrote to memory of 1412	1276	winsrv.exe	31
PID 1276 wrote to memory of 1412	1276	winsrv.exe	31
PID 1276 wrote to memory of 1412	1276	winsrv.exe	31
PID 1276 wrote to memory of 1412	1276	winsrv.exe	31
PID 1276 wrote to memory of 1412	1276	winsrv.exe	31
PID 1276 wrote to memory of 1412	1276	winsrv.exe	31
PID 1276 wrote to memory of 1412	1276	winsrv.exe	31
PID 1276 wrote to memory of 1412	1276	winsrv.exe	31

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:1600
- 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:988
- - C:\Users\Admin\AppData\Local\Temp\91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe
    "C:\Users\Admin\AppData\Local\Temp\91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc.exe"
    3⤵
    - Modifies firewall policy service
    - Loads dropped DLL
    - Adds Run key to start application
    - Suspicious use of WriteProcessMemory
    PID:1752
  - - 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:1584
    - - 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:1276
      - 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:1412

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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\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
\Users\Admin\AppData\Local\Temp\POSITION4DLLNAME.txt

Filesize
2KB

MD5
b146b3da4e50cdbb10d418ccb8279fc6

SHA1
8d31520b964935f6f91dcc5c8efc3ab3d6792597

SHA256
a5a7fef4f6ad1c2d0f299cafdc686974060512e6852bd4b8cba32f6a907a65f4

SHA512
f92ad30eb7bfac9e172af1701125db56f58f251b8c45fb53ba61bf97ba94a95e54f395f2485c006fb9c60fb4578a0fb6aa1406c35eefa7f096371c0d46fd7101

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

Filesize
2KB

MD5
b146b3da4e50cdbb10d418ccb8279fc6

SHA1
8d31520b964935f6f91dcc5c8efc3ab3d6792597

SHA256
a5a7fef4f6ad1c2d0f299cafdc686974060512e6852bd4b8cba32f6a907a65f4

SHA512
f92ad30eb7bfac9e172af1701125db56f58f251b8c45fb53ba61bf97ba94a95e54f395f2485c006fb9c60fb4578a0fb6aa1406c35eefa7f096371c0d46fd7101

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

Filesize
66KB

MD5
f35b337bf4ab8ad26f7d604c1e245ac1

SHA1
8ccfc856c08e793dd246c04a1ad56a755cdb3f3c

SHA256
91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc

SHA512
4080baa290c199ad93bd225e4a4425fb834b6d3a3bc5b90910ceabefdf3ea67075bf2526c956f4f46eb8f54fbf1833e4f2f2c1eb98c84912e5918ce86101431f

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

Filesize
66KB

MD5
f35b337bf4ab8ad26f7d604c1e245ac1

SHA1
8ccfc856c08e793dd246c04a1ad56a755cdb3f3c

SHA256
91c857f60b65ddcf3925a87505917c1e48cb2ab8c54e855a22a40186226da9cc

SHA512
4080baa290c199ad93bd225e4a4425fb834b6d3a3bc5b90910ceabefdf3ea67075bf2526c956f4f46eb8f54fbf1833e4f2f2c1eb98c84912e5918ce86101431f

Download Submit
memory/988-81-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/988-67-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/988-56-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/988-63-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/988-57-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/988-61-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/988-59-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/988-60-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1276-118-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1600-54-0x00000000761F1000-0x00000000761F3000-memory.dmp

Filesize
8KB

Download
memory/1752-69-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1752-82-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1752-80-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1752-68-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1752-74-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1752-71-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1752-73-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1752-76-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1752-75-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads