59f1f955f073e2a326d914a15fff168d9c304795270b26bdfb5e1d68d1f96742

General

Target

Purchase Order 24432 .xlsx
Size

14KB
MD5

d31859fb69340e3d8aee9d8bc98dfed5
SHA1

6b31e11e8c43a222bd07cd79273d9013b2137001
SHA256

59f1f955f073e2a326d914a15fff168d9c304795270b26bdfb5e1d68d1f96742
SHA512

94ac7f4d94f7c78d1e4a3a16f90d251bd7a815949039294b340375b0da5d2515444dc97e2319dbe6849267ee77f73470ff960db599ad6dae67c80e8e84052f00

Score

8^/10

spyware persistence

Malware Config

Signatures

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

EXCEL.EXEregasms.exe

pid	Process
828	EXCEL.EXE
828	EXCEL.EXE
828	EXCEL.EXE
1952	regasms.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

EQNEDT32.EXEregasms.exe

description	pid	Process	procid_target
PID 1524 wrote to memory of 1740	1524	EQNEDT32.EXE	27
PID 1524 wrote to memory of 1740	1524	EQNEDT32.EXE	27
PID 1524 wrote to memory of 1740	1524	EQNEDT32.EXE	27
PID 1524 wrote to memory of 1740	1524	EQNEDT32.EXE	27
PID 1740 wrote to memory of 1916	1740	regasms.exe	31
PID 1740 wrote to memory of 1916	1740	regasms.exe	31
PID 1740 wrote to memory of 1916	1740	regasms.exe	31
PID 1740 wrote to memory of 1916	1740	regasms.exe	31
PID 1740 wrote to memory of 1972	1740	regasms.exe	33
PID 1740 wrote to memory of 1972	1740	regasms.exe	33
PID 1740 wrote to memory of 1972	1740	regasms.exe	33
PID 1740 wrote to memory of 1972	1740	regasms.exe	33
PID 1740 wrote to memory of 1952	1740	regasms.exe	34
PID 1740 wrote to memory of 1952	1740	regasms.exe	34
PID 1740 wrote to memory of 1952	1740	regasms.exe	34
PID 1740 wrote to memory of 1952	1740	regasms.exe	34
PID 1740 wrote to memory of 1952	1740	regasms.exe	34
PID 1740 wrote to memory of 1952	1740	regasms.exe	34
PID 1740 wrote to memory of 1952	1740	regasms.exe	34
PID 1740 wrote to memory of 1952	1740	regasms.exe	34
PID 1740 wrote to memory of 1952	1740	regasms.exe	34

Suspicious use of SetThreadContext 1 IoCs

Processes:

regasms.exe

description	pid	Process	procid_target
PID 1740 set thread context of 1952	1740	regasms.exe	34

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

regasms.exeregasms.exe

description	pid	Process
Token: SeDebugPrivilege	1740	regasms.exe
Token: SeDebugPrivilege	1952	regasms.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware

Data from Local System
T1005

Credentials in Files
T1081

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid	Process
828	EXCEL.EXE

Adds Run entry to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

regasms.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-910373003-3952921535-3480519689-1000\Software\Microsoft\Windows\CurrentVersion\Run\Officex = "C:\\Users\\Admin\\AppData\\Roaming\\Officex\\Officex.exe"	regasms.exe

Blacklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow	pid	Process
4	1524	EQNEDT32.EXE

Loads dropped DLL 1 IoCs

Processes:

EQNEDT32.EXE

pid	Process
1524	EQNEDT32.EXE

Executes dropped EXE 3 IoCs

Processes:

regasms.exeregasms.exeregasms.exe

pid	Process
1740	regasms.exe
1972	regasms.exe
1952	regasms.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

regasms.exeregasms.exe

pid	Process
1740	regasms.exe
1740	regasms.exe
1740	regasms.exe
1952	regasms.exe
1952	regasms.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

Processes:

EQNEDT32.EXE

pid	Process
1524	EQNEDT32.EXE

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

Processes:

schtasks.exe

pid	Process
1916	schtasks.exe

C:\Program Files\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\Purchase Order 24432 .xlsx"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious behavior: AddClipboardFormatListener
PID:828

C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Suspicious use of WriteProcessMemory
- Blacklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
PID:1524
- C:\Users\Admin\AppData\Roaming\regasms.exe
  C:\Users\Admin\AppData\Roaming\regasms.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  PID:1740
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\jlTYJmXxtezeDi" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFE6A.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:1916
- - C:\Users\Admin\AppData\Roaming\regasms.exe
    "{path}"
    3⤵
    - Executes dropped EXE
    PID:1972
- - C:\Users\Admin\AppData\Roaming\regasms.exe
    "{path}"
    3⤵
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of AdjustPrivilegeToken
    - Adds Run entry to start application
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:1952

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

Scheduled Task

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

2

T1081

Discovery

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpFE6A.tmp

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C:\Users\Admin\AppData\Roaming\regasms.exe

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C:\Users\Admin\AppData\Roaming\regasms.exe

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C:\Users\Admin\AppData\Roaming\regasms.exe

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C:\Users\Admin\AppData\Roaming\regasms.exe

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\Users\Admin\AppData\Roaming\regasms.exe

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memory/1740-1-0x0000000000000000-mapping.dmp

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memory/1916-4-0x0000000000000000-mapping.dmp

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memory/1952-7-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

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memory/1952-8-0x0000000000445CAE-mapping.dmp

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memory/1952-10-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

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memory/1952-11-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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