c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d

Analysis

max time kernel
162s
max time network
173s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07/11/2022, 10:35

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General

Target

c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe
Size

100KB
MD5

0d5a6faadb05d882b42df36002ecea00
SHA1

7d5d7fedd8121fefe4d2ec06acff374fb990a7bf
SHA256

c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d
SHA512

5b28b9a6ab9407fcac4a7c022794555703199babed6dfed5370894cd7417ed42f04baeb24ebe2d710b98906871e31d8d78460c382bcc69f9ddd31aba266d65af
SSDEEP

1536:QbWJH5M6CzfUOQKmy0IYf8Yj9Qf5YcZ6QBoJug8bdc:QbWJZM/U1KmrId84ucZ6go0g8bdc

Score

8^/10

persistence upx

Malware Config

Signatures

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\protocol	winlogon.exe

Executes dropped EXE 3 IoCs

pid	Process
2880	winlogon.exe
5024	winlogon.exe
4576	csrss.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5024-139-0x0000000000400000-0x0000000000489000-memory.dmp	upx
behavioral2/memory/5024-140-0x0000000000400000-0x0000000000489000-memory.dmp	upx
behavioral2/memory/5024-141-0x0000000000400000-0x0000000000489000-memory.dmp	upx
behavioral2/memory/5024-144-0x0000000000400000-0x0000000000489000-memory.dmp	upx
behavioral2/memory/5024-145-0x0000000000400000-0x0000000000489000-memory.dmp	upx
behavioral2/memory/5024-146-0x0000000000400000-0x0000000000489000-memory.dmp	upx
behavioral2/memory/5024-156-0x0000000000400000-0x0000000000489000-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	c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	winlogon.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	winlogon.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Windows\\winlogon.exe"	winlogon.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	winlogon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\*-87497009 = "\"\|\""	winlogon.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce	winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\*-87497009 = "\"\|\""	winlogon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Windows\\winlogon.exe"	winlogon.exe

Maps connected drives based on registry 3 TTPs 3 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 opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	winlogon.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum	winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 = "xobv"	winlogon.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2880 set thread context of 5024	2880	winlogon.exe	82

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\winlogon.exe	c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe
File opened for modification	C:\Windows\winlogon.exe	c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe
File opened for modification	C:\Windows\winlogon.exe	winlogon.exe

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\	winlogon.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1448	c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe
1448	c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe
1448	c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe
1448	c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe
2880	winlogon.exe
2880	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
4576	csrss.exe
4576	csrss.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
4576	csrss.exe
4576	csrss.exe
4576	csrss.exe
4576	csrss.exe
4576	csrss.exe
4576	csrss.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
4576	csrss.exe
4576	csrss.exe
4576	csrss.exe
5024	winlogon.exe
5024	winlogon.exe
4576	csrss.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
4576	csrss.exe
4576	csrss.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
4576	csrss.exe
4576	csrss.exe
4576	csrss.exe
4576	csrss.exe
4576	csrss.exe
4576	csrss.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
5024	winlogon.exe
4576	csrss.exe
4576	csrss.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1448	c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe
Token: SeDebugPrivilege	2880	winlogon.exe
Token: SeDebugPrivilege	4576	csrss.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1448 wrote to memory of 2880	1448	c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe	81
PID 1448 wrote to memory of 2880	1448	c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe	81
PID 1448 wrote to memory of 2880	1448	c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe	81
PID 2880 wrote to memory of 5024	2880	winlogon.exe	82
PID 2880 wrote to memory of 5024	2880	winlogon.exe	82
PID 2880 wrote to memory of 5024	2880	winlogon.exe	82
PID 2880 wrote to memory of 5024	2880	winlogon.exe	82
PID 2880 wrote to memory of 5024	2880	winlogon.exe	82
PID 2880 wrote to memory of 5024	2880	winlogon.exe	82
PID 2880 wrote to memory of 5024	2880	winlogon.exe	82
PID 2880 wrote to memory of 5024	2880	winlogon.exe	82
PID 2880 wrote to memory of 4576	2880	winlogon.exe	83
PID 2880 wrote to memory of 4576	2880	winlogon.exe	83
PID 2880 wrote to memory of 4576	2880	winlogon.exe	83
PID 5024 wrote to memory of 4656	5024	winlogon.exe	86
PID 5024 wrote to memory of 4656	5024	winlogon.exe	86
PID 5024 wrote to memory of 4656	5024	winlogon.exe	86
PID 5024 wrote to memory of 448	5024	winlogon.exe	88
PID 5024 wrote to memory of 448	5024	winlogon.exe	88
PID 5024 wrote to memory of 448	5024	winlogon.exe	88

C:\Users\Admin\AppData\Local\Temp\c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe
"C:\Users\Admin\AppData\Local\Temp\c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1448
- C:\Windows\winlogon.exe
  "C:\Windows\winlogon.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2880
- - C:\Windows\winlogon.exe
    "C:\Windows\winlogon.exe"
    3⤵
    - Drops file in Drivers directory
    - Executes dropped EXE
    - Checks computer location settings
    - Adds Run key to start application
    - Maps connected drives based on registry
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:5024
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\I-87497009.bat" "
      4⤵
      PID:4656
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\U-87497009.bat" "
      4⤵
      PID:448
- - C:\Users\Admin\AppData\Roaming\csrss.exe
    "C:\Users\Admin\AppData\Roaming\csrss.exe" -keyhide -prochide 5024
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4576

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

Peripheral Device Discovery

T1120

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\I-87497009.bat

Filesize
23B

MD5
97aae1211f3a9c7ecd8531ee87ed5354

SHA1
3cec50b07d80bb054e90458d795e9867ba678851

SHA256
8668f8216a6e5ab8ff1fb5d4ad886ba768c843eb98394cd260d53e8ed4fbc145

SHA512
0fd8e9b2eb6a92794b569b7a29ff6609e81e1bb90ef2cb58cec29cf6c37b32fd82879ad24a1a7fef0ade0c6a8a3a1a7b7d7b7171e0c36cfac0b24df52aba6f1e

Download Submit
C:\Users\Admin\AppData\Local\Temp\U-87497009.bat

Filesize
148B

MD5
f9306f9e4a6883db6b5a1d4b193a5bfe

SHA1
e906f67cdba667ceef9ac67930e29358fa696fe9

SHA256
254752c9726228c0109a77990a75c423b07c57b7be9162e99526d9d55db7b80f

SHA512
c5e37d3440e8beaf5062f967d38ca27c9624cb8627afaf909d0c5751634cd849d1438d2f54c39b3df8271d6c3b812e86d72e21290b71a0bf52511e1ccd818578

Download Submit
C:\Users\Admin\AppData\Roaming\csrss.exe

Filesize
100KB

MD5
0d5a6faadb05d882b42df36002ecea00

SHA1
7d5d7fedd8121fefe4d2ec06acff374fb990a7bf

SHA256
c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d

SHA512
5b28b9a6ab9407fcac4a7c022794555703199babed6dfed5370894cd7417ed42f04baeb24ebe2d710b98906871e31d8d78460c382bcc69f9ddd31aba266d65af

Download Submit
C:\Users\Admin\AppData\Roaming\csrss.exe

Filesize
100KB

MD5
0d5a6faadb05d882b42df36002ecea00

SHA1
7d5d7fedd8121fefe4d2ec06acff374fb990a7bf

SHA256
c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d

SHA512
5b28b9a6ab9407fcac4a7c022794555703199babed6dfed5370894cd7417ed42f04baeb24ebe2d710b98906871e31d8d78460c382bcc69f9ddd31aba266d65af

Download Submit
C:\Windows\winlogon.exe

Filesize
100KB

MD5
0d5a6faadb05d882b42df36002ecea00

SHA1
7d5d7fedd8121fefe4d2ec06acff374fb990a7bf

SHA256
c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d

SHA512
5b28b9a6ab9407fcac4a7c022794555703199babed6dfed5370894cd7417ed42f04baeb24ebe2d710b98906871e31d8d78460c382bcc69f9ddd31aba266d65af

Download Submit
C:\Windows\winlogon.exe

Filesize
100KB

MD5
0d5a6faadb05d882b42df36002ecea00

SHA1
7d5d7fedd8121fefe4d2ec06acff374fb990a7bf

SHA256
c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d

SHA512
5b28b9a6ab9407fcac4a7c022794555703199babed6dfed5370894cd7417ed42f04baeb24ebe2d710b98906871e31d8d78460c382bcc69f9ddd31aba266d65af

Download Submit
C:\Windows\winlogon.exe

Filesize
100KB

MD5
0d5a6faadb05d882b42df36002ecea00

SHA1
7d5d7fedd8121fefe4d2ec06acff374fb990a7bf

SHA256
c665becd2d778b838224b158f9864b695cda2c05d9492f8db93d1c4b1080847d

SHA512
5b28b9a6ab9407fcac4a7c022794555703199babed6dfed5370894cd7417ed42f04baeb24ebe2d710b98906871e31d8d78460c382bcc69f9ddd31aba266d65af

Download Submit
memory/1448-132-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/1448-151-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/1448-133-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/2880-137-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/2880-150-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/4576-158-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/4576-152-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/5024-146-0x0000000000400000-0x0000000000489000-memory.dmp

Filesize
548KB

Download
memory/5024-145-0x0000000000400000-0x0000000000489000-memory.dmp

Filesize
548KB

Download
memory/5024-144-0x0000000000400000-0x0000000000489000-memory.dmp

Filesize
548KB

Download
memory/5024-141-0x0000000000400000-0x0000000000489000-memory.dmp

Filesize
548KB

Download
memory/5024-156-0x0000000000400000-0x0000000000489000-memory.dmp

Filesize
548KB

Download
memory/5024-140-0x0000000000400000-0x0000000000489000-memory.dmp

Filesize
548KB

Download
memory/5024-139-0x0000000000400000-0x0000000000489000-memory.dmp

Filesize
548KB

Download