cfdf1aaae40f7b8ac7a06aaf37e7fa60b6b64169bc54ed00c0da0da23544f17a

Analysis

max time kernel
126s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
19/09/2022, 01:07

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General

Target

cfdf1aaae40f7b8ac7a06aaf37e7fa60b6b64169bc54ed00c0da0da23544f17a.exe
Size

35KB
MD5

8af2119de15a51a7df22336bb212120c
SHA1

f2096fc4bde47303ae70555475b0cd04f3488ab3
SHA256

cfdf1aaae40f7b8ac7a06aaf37e7fa60b6b64169bc54ed00c0da0da23544f17a
SHA512

d8d8706cefe5879dee7873f25c90cd69c8a64546a1288558362f7504324c47dcdad617d19904c41cf3b110bad7cafc0615072e9e2190b0510b8ba76f77eeefe4
SSDEEP

768:aHtMkeNmrfgevVkzkcVpKPybIhB+ZhL2VC1HprM8YJ:aOkIbh+sIOZhL2IpQb

Score

8^/10

persistence upx

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
4304	CFDF1A~1.EXE
2300	winhost32.exe
5036	winhost32.exe

Modifies Installed Components in the registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\ActiveX Key	winhost32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\ActiveX Key\StubPath = "C:\\Windows\\winhost32.exe"	winhost32.exe

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4728-132-0x0000000000400000-0x0000000000417000-memory.dmp	upx

Checks computer location settings 2 TTPs 3 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	CFDF1A~1.EXE
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	winhost32.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	cfdf1aaae40f7b8ac7a06aaf37e7fa60b6b64169bc54ed00c0da0da23544f17a.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\winhost32.exe	CFDF1A~1.EXE
File opened for modification	C:\Windows\winhost32.exe	CFDF1A~1.EXE
File created	C:\Windows\w32_systm.exe	cfdf1aaae40f7b8ac7a06aaf37e7fa60b6b64169bc54ed00c0da0da23544f17a.exe
File created	C:\Windows\w32_sysbm.bat	cfdf1aaae40f7b8ac7a06aaf37e7fa60b6b64169bc54ed00c0da0da23544f17a.exe

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 FindShellTrayWindow 1 IoCs

pid	Process
5036	winhost32.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4728 wrote to memory of 2116	4728	cfdf1aaae40f7b8ac7a06aaf37e7fa60b6b64169bc54ed00c0da0da23544f17a.exe	80
PID 4728 wrote to memory of 2116	4728	cfdf1aaae40f7b8ac7a06aaf37e7fa60b6b64169bc54ed00c0da0da23544f17a.exe	80
PID 4728 wrote to memory of 2116	4728	cfdf1aaae40f7b8ac7a06aaf37e7fa60b6b64169bc54ed00c0da0da23544f17a.exe	80
PID 2116 wrote to memory of 4304	2116	cmd.exe	82
PID 2116 wrote to memory of 4304	2116	cmd.exe	82
PID 2116 wrote to memory of 4304	2116	cmd.exe	82
PID 4304 wrote to memory of 2300	4304	CFDF1A~1.EXE	83
PID 4304 wrote to memory of 2300	4304	CFDF1A~1.EXE	83
PID 4304 wrote to memory of 2300	4304	CFDF1A~1.EXE	83
PID 2300 wrote to memory of 5036	2300	winhost32.exe	84
PID 2300 wrote to memory of 5036	2300	winhost32.exe	84
PID 2300 wrote to memory of 5036	2300	winhost32.exe	84
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39
PID 5036 wrote to memory of 376	5036	winhost32.exe	39

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:376
- C:\Users\Admin\AppData\Local\Temp\cfdf1aaae40f7b8ac7a06aaf37e7fa60b6b64169bc54ed00c0da0da23544f17a.exe
  "C:\Users\Admin\AppData\Local\Temp\cfdf1aaae40f7b8ac7a06aaf37e7fa60b6b64169bc54ed00c0da0da23544f17a.exe"
  2⤵
  - Checks computer location settings
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4728
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Windows\w32_sysbm.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2116
  - - C:\Users\Admin\AppData\Local\Temp\CFDF1A~1.EXE
      C:\Users\Admin\AppData\Local\Temp\CFDF1A~1.EXE
      4⤵
      Executes dropped EXE
      Checks computer location settings
      Drops file in Windows directory
      Suspicious use of WriteProcessMemory
      PID:4304
    - - C:\Windows\winhost32.exe
        
        "C:\Windows\winhost32.exe" "C:\Users\Admin\AppData\Local\Temp\CFDF1A~1.EXE"
        5⤵
        Executes dropped EXE
        Checks computer location settings
        Suspicious use of WriteProcessMemory
        
        PID:2300
      - C:\Windows\winhost32.exe
        
        "C:\Windows\winhost32.exe" stm
        6⤵
        Executes dropped EXE
        Modifies Installed Components in the registry
        Suspicious use of FindShellTrayWindow
        Suspicious use of WriteProcessMemory
        
        PID:5036

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\CFDF1A~1.EXE

Filesize
65KB

MD5
10a424a5ad51dec49cdc461fd759bb5e

SHA1
784e68b8fdb64e7ff178c148a7a6f0b5853d8cb1

SHA256
862f21f6bc7e6087931d93a209b40c452544e29b69d9687ea887243f493a8fc6

SHA512
5e1529315418361bb55f0dcee33c32b015f62b14f25c4ba60479c972393bb56b885aba59243efca9605b695f7df0b44ea6b934da16d7d27611ee2c81fa5cfabc

Download Submit
C:\Users\Admin\AppData\Local\Temp\CFDF1A~1.EXE

Filesize
65KB

MD5
10a424a5ad51dec49cdc461fd759bb5e

SHA1
784e68b8fdb64e7ff178c148a7a6f0b5853d8cb1

SHA256
862f21f6bc7e6087931d93a209b40c452544e29b69d9687ea887243f493a8fc6

SHA512
5e1529315418361bb55f0dcee33c32b015f62b14f25c4ba60479c972393bb56b885aba59243efca9605b695f7df0b44ea6b934da16d7d27611ee2c81fa5cfabc

Download Submit
C:\Windows\w32_sysbm.bat

Filesize
339B

MD5
d012974c57a00774579e9e637d14cf69

SHA1
272a17c7985918bf7c150f78b470d023a7f09993

SHA256
6cabeeabb81d506dbe423aaf647d4243982ff45867b2f2c45254326e2e71f4e5

SHA512
672b80d48d3006f92ee5319e3f80ff79f5f14c830868ad11caf4ad132c82fe7c83bce9964badd576dc48670936b3ad6039a84a731931297561b35a9ffd70381e

Download Submit
C:\Windows\w32_systm.exe

Filesize
65KB

MD5
10a424a5ad51dec49cdc461fd759bb5e

SHA1
784e68b8fdb64e7ff178c148a7a6f0b5853d8cb1

SHA256
862f21f6bc7e6087931d93a209b40c452544e29b69d9687ea887243f493a8fc6

SHA512
5e1529315418361bb55f0dcee33c32b015f62b14f25c4ba60479c972393bb56b885aba59243efca9605b695f7df0b44ea6b934da16d7d27611ee2c81fa5cfabc

Download Submit
C:\Windows\winhost32.exe

Filesize
65KB

MD5
10a424a5ad51dec49cdc461fd759bb5e

SHA1
784e68b8fdb64e7ff178c148a7a6f0b5853d8cb1

SHA256
862f21f6bc7e6087931d93a209b40c452544e29b69d9687ea887243f493a8fc6

SHA512
5e1529315418361bb55f0dcee33c32b015f62b14f25c4ba60479c972393bb56b885aba59243efca9605b695f7df0b44ea6b934da16d7d27611ee2c81fa5cfabc

Download Submit
C:\Windows\winhost32.exe

Filesize
65KB

MD5
10a424a5ad51dec49cdc461fd759bb5e

SHA1
784e68b8fdb64e7ff178c148a7a6f0b5853d8cb1

SHA256
862f21f6bc7e6087931d93a209b40c452544e29b69d9687ea887243f493a8fc6

SHA512
5e1529315418361bb55f0dcee33c32b015f62b14f25c4ba60479c972393bb56b885aba59243efca9605b695f7df0b44ea6b934da16d7d27611ee2c81fa5cfabc

Download Submit
C:\Windows\winhost32.exe

Filesize
65KB

MD5
10a424a5ad51dec49cdc461fd759bb5e

SHA1
784e68b8fdb64e7ff178c148a7a6f0b5853d8cb1

SHA256
862f21f6bc7e6087931d93a209b40c452544e29b69d9687ea887243f493a8fc6

SHA512
5e1529315418361bb55f0dcee33c32b015f62b14f25c4ba60479c972393bb56b885aba59243efca9605b695f7df0b44ea6b934da16d7d27611ee2c81fa5cfabc

Download Submit
memory/4728-132-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5036-145-0x0000000010410000-0x0000000010426000-memory.dmp

Filesize
88KB

Download