641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896

General

Target

641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
Size

2.3MB
MD5

870bc17643a8e6620ab5add7f744b766
SHA1

f32a30d3059d87c1e6244e8a120f090b70f24be5
SHA256

641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896
SHA512

d87ed8f6e3ba362011653f865d702a601a9bd6c398751104fd4941cb1f9bf0509b1ff725561b1d0e1081d882f4ec390a2257da194d0fa69d654677d61ae9f4f2
SSDEEP

49152:Qjvk2d9rJpNJ6jUFdXaDoIHmXMupzh72lxakn2YpHdy4ZBgIoooNe:QrkI9rSjA5aDo73pzF2bz3p9y4HgIoov

Score

7^/10

discovery persistence

Malware Config

Signatures

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x00070000000234b2-11.dat	acprotect

Executes dropped EXE 2 IoCs

pid	Process
4436	ctfmen.exe
3544	smnss.exe

Loads dropped DLL 2 IoCs

pid	Process
1096	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
3544	smnss.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ctfmen = "C:\\Windows\\system32\\ctfmen.exe"	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ctfmen = "C:\\Windows\\system32\\ctfmen.exe"	smnss.exe

Maps connected drives based on registry 3 TTPs 6 IoCs

Disk 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 value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	smnss.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\1	smnss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\1	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	smnss.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\satornas.dll	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
File created	C:\Windows\SysWOW64\smnss.exe	smnss.exe
File created	C:\Windows\SysWOW64\shervans.dll	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
File created	C:\Windows\SysWOW64\grcopy.dll	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
File opened for modification	C:\Windows\SysWOW64\grcopy.dll	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
File opened for modification	C:\Windows\SysWOW64\shervans.dll	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
File created	C:\Windows\SysWOW64\smnss.exe	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
File created	C:\Windows\SysWOW64\ctfmen.exe	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
File opened for modification	C:\Windows\SysWOW64\ctfmen.exe	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
File opened for modification	C:\Windows\SysWOW64\satornas.dll	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
File created	C:\Windows\SysWOW64\zipfi.dll	smnss.exe
File created	C:\Windows\SysWOW64\zipfiaq.dll	smnss.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs

pid	Process
1096	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
1096	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
3544	smnss.exe
3544	smnss.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3764	3544	WerFault.exe	93

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ctfmen.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	smnss.exe

Modifies registry class 6 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E6FB5E20-DE35-11CF-9C87-00AA005127ED}\InprocServer32	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E6FB5E20-DE35-11CF-9C87-00AA005127ED}	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E6FB5E20-DE35-11CF-9C87-00AA005127ED}\InprocServer32\ = "C:\\Windows\\SysWow64\\shervans.dll"	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E6FB5E20-DE35-11CF-9C87-00AA005127ED}\InprocServer32\ = "C:\\Windows\\SysWow64\\shervans.dll"	smnss.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3544	smnss.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1096	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
3544	smnss.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1096 wrote to memory of 4436	1096	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe	92
PID 1096 wrote to memory of 4436	1096	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe	92
PID 1096 wrote to memory of 4436	1096	641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe	92
PID 4436 wrote to memory of 3544	4436	ctfmen.exe	93
PID 4436 wrote to memory of 3544	4436	ctfmen.exe	93
PID 4436 wrote to memory of 3544	4436	ctfmen.exe	93

C:\Users\Admin\AppData\Local\Temp\641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe
"C:\Users\Admin\AppData\Local\Temp\641ccb91858a503af1bcefcb048de6eaa5d351e20e7fea098edf8b0985d2c896.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Maps connected drives based on registry
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1096
- C:\Windows\SysWOW64\ctfmen.exe
  ctfmen.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4436
- - C:\Windows\SysWOW64\smnss.exe
    C:\Windows\system32\smnss.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - Maps connected drives based on registry
    - Drops file in System32 directory
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Modifies registry class
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:3544
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3544 -s 1464
      4⤵
      Program crash
      PID:3764

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3544 -ip 3544
1⤵
PID:4264

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\ctfmen.exe

Filesize
4KB

MD5
a142cfb7e00ac98cd801d2e7ae2a53f0

SHA1
715d2cd029ff63b57890a459f27005556981ccd7

SHA256
f8694773074c3bbdc2a97110b2a975ed7355f80faa5e003606fb1df16be834bc

SHA512
c3d51f6cefcc1186da72c5a482aa50d333b48f41480131576cd5982a1a02dea2d029b0fd3cb43eea872bbca9bd30f1c73fcfb67f6e7a004dbfc76fadb6fc8bf6

Download Submit
C:\Windows\SysWOW64\grcopy.dll

Filesize
2.3MB

MD5
c82a9423f988bdd78ee576ed1ad79773

SHA1
fd11e4745c06281234859bfc350656b37181c0ee

SHA256
e855d3820b033c7d7d3ffcc226dd232a0d390cc1ad175e986a31ce74fb183db5

SHA512
78404d9aff6bc569ea102a4841011aaa6925ce17186813409a97a5724562659c070b881f87ce7d2bf2fab8be585ab7b31396e6601c35a940eb46f2a57aa40c1e

Download Submit
C:\Windows\SysWOW64\satornas.dll

Filesize
183B

MD5
0ad6d543f0d4ae5f2bbe308f8f77924a

SHA1
1c92750add518046e3fa05a90fee46882451c815

SHA256
3e108a1007b7800795d0089a2c21e1e79c65dae5512454367905a3ba30a77917

SHA512
8dc508c11d08399fd30457e3ae0e112fa0e197b57cb94a7ddb75b1b4610e9dc5941c7832290baa8033f040a8816edf404cd4273be1b1b7fd670a012fa42178f8

Download Submit
C:\Windows\SysWOW64\shervans.dll

Filesize
8KB

MD5
5b09631ea49defecf3af05bbc3467994

SHA1
6b0ddd20317aeeb0b4dca4079f01b80a052662be

SHA256
47a41c08e5bd01f6b209b5e96242ed1e0dac39260ebc355eaa89a85428a61175

SHA512
25d14355e6afea1a6dbec95d5ffd6caf3158cec349e9fbd94d070c47acdad7b71d96c1b9d70e47280de526e004fc6cfe31e5e9de60febe9d2c13b776b3ca8dce

Download Submit
memory/1096-31-0x000000007FA70000-0x000000007FE41000-memory.dmp

Filesize
3.8MB

Download
memory/1096-24-0x0000000000400000-0x0000000000DCE000-memory.dmp

Filesize
9.8MB

Download
memory/1096-1-0x000000007FA70000-0x000000007FE41000-memory.dmp

Filesize
3.8MB

Download
memory/1096-14-0x0000000010000000-0x000000001000D000-memory.dmp

Filesize
52KB

Download
memory/1096-0-0x0000000000400000-0x0000000000DCE000-memory.dmp

Filesize
9.8MB

Download
memory/1096-25-0x0000000010000000-0x000000001000D000-memory.dmp

Filesize
52KB

Download
memory/3544-32-0x0000000000400000-0x0000000000DCE000-memory.dmp

Filesize
9.8MB

Download
memory/3544-35-0x000000007FA70000-0x000000007FE41000-memory.dmp

Filesize
3.8MB

Download
memory/3544-40-0x0000000010000000-0x000000001000D000-memory.dmp

Filesize
52KB

Download
memory/3544-41-0x0000000000400000-0x0000000000DCE000-memory.dmp

Filesize
9.8MB

Download
memory/3544-44-0x000000007FA70000-0x000000007FE41000-memory.dmp

Filesize
3.8MB

Download
memory/3544-43-0x0000000010000000-0x000000001000D000-memory.dmp

Filesize
52KB

Download
memory/4436-30-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/4436-22-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads