f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843

Analysis

max time kernel
150s
max time network
149s
platform
windows10_x64
resource
win10-en-20210920
submitted
30/09/2021, 12:17

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General

Target
f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
Size 328KB
Sample210930-pf2daahgdp
SHA256 f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843
MD5 83741fb22be6d332566efd7ae31721fb
SHA1 9687d64636a6576dd187bb18851bd83b0a3431e1
SHA512 fa109417aeb83045bef003e2e22adaff7a45621b0bec6342ba7fadea16487202402a326452d36da4a7c85a73aadff4d56e9f8a16fe4a1c753587a577b5d11c04
MD5 SHA1 SHA512

Score

8^/10

persistence upx

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Policies = "C:\\Windows\\system32\\Winlog\\winlogon.exe"	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
Key created	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Policies = "C:\\Windows\\system32\\Winlog\\winlogon.exe"	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe

Executes dropped EXE 1 IoCs

pid	Process
856	winlogon.exe

Modifies Installed Components in the registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000500000001ab9b-124.dat	upx
behavioral2/memory/2688-126-0x0000000010480000-0x00000000104E1000-memory.dmp	upx
behavioral2/memory/1296-130-0x0000000010560000-0x00000000105C1000-memory.dmp	upx
behavioral2/files/0x000500000001ab9b-132.dat	upx

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-1-5-21-2481030822-2828258191-1606198294-1000\Control Panel\International\Geo\Nation	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\system32\\Winlog\\winlogon.exe"	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\system32\\Winlog\\winlogon.exe"	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
Key created	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Winlog\winlogon.exe	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
File opened for modification	C:\Windows\SysWOW64\Winlog\	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
File created	C:\Windows\SysWOW64\Winlog\winlogon.exe	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
File opened for modification	C:\Windows\SysWOW64\Winlog\winlogon.exe	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4008	1296	WerFault.exe	72
2180	856	WerFault.exe	75

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe
2180	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1296	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1296	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
Token: SeDebugPrivilege	1296	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
Token: SeRestorePrivilege	4008	WerFault.exe
Token: SeBackupPrivilege	4008	WerFault.exe
Token: SeDebugPrivilege	4008	WerFault.exe
Token: SeDebugPrivilege	2180	WerFault.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26
PID 2524 wrote to memory of 3036	2524	f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe	26

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3036
- C:\Users\Admin\AppData\Local\Temp\f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
  "C:\Users\Admin\AppData\Local\Temp\f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe"
  2⤵
  - Adds policy Run key to start application
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:2524
- - C:\Windows\SysWOW64\explorer.exe
    explorer.exe
    3⤵
    PID:2688
- - C:\Program Files\Internet Explorer\iexplore.exe
    "C:\Program Files\Internet Explorer\iexplore.exe"
    3⤵
    PID:508
- - C:\Users\Admin\AppData\Local\Temp\f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe
    "C:\Users\Admin\AppData\Local\Temp\f5e1ee81dfe47702eb9ea3868962528b2053a6a038f04be81eabd52bd52dc843.exe"
    3⤵
    - Checks computer location settings
    - Drops file in System32 directory
    - Modifies registry class
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:1296
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1296 -s 1536
      4⤵
      Program crash
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4008
  - - C:\Windows\SysWOW64\Winlog\winlogon.exe
      "C:\Windows\system32\Winlog\winlogon.exe"
      4⤵
      Executes dropped EXE
      PID:856
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 856 -s 636
        5⤵
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2180

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

memory/1296-130-0x0000000010560000-0x00000000105C1000-memory.dmp

Download

memory/2688-120-0x0000000000890000-0x00000000009C6000-memory.dmp

Download

memory/2688-122-0x0000000000890000-0x00000000009C6000-memory.dmp

Download

memory/2688-125-0x0000000005090000-0x0000000005091000-memory.dmp

Download

memory/2688-126-0x0000000010480000-0x00000000104E1000-memory.dmp

Download

memory/2688-121-0x0000000000890000-0x00000000009C6000-memory.dmp

Download

memory/2688-118-0x0000000000150000-0x0000000000151000-memory.dmp

Download

memory/2688-119-0x0000000000410000-0x0000000000411000-memory.dmp

Download