masslogger | 4f469a543b083c08d289261d3e9c0e7c8eaebb92633b4e8153d9448bc4c7a635

Analysis

max time kernel
58s
max time network
119s
platform
windows7_x64
resource
win7-20220414-en
submitted
21-05-2022 00:57

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General

Target

enquiry20j20endooooo746e66682DIF.exe
Size

1.0MB
MD5

f819668951d4b48df71db51d6b218299
SHA1

0e1704dbb3ce830c3a1e0719b6002419e578a196
SHA256

49f037f00bc0861be7b26aa3a1d51e803b5ebe558d801d470783485a58bb799a
SHA512

5875bf3377e9ed0cacc04e421b3e7a7f97fe1e810d4d85408ca2a67a9f0fef8ba1e652fa6b3ab9ed04b2e9a01193d5871f4c006ea236d38fb2ba8e30fc8022c1

Score

10^/10

masslogger ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\79FE0CC911\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.4.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.51 Location: United States OS: Microsoft Windows 7 Ultimate 64bit CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 1:22:39 AM MassLogger Started: 5/21/2022 1:22:28 AM Interval: 7 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\enquiry20j20endooooo746e66682DIF.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Signatures

MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

resource	yara_rule
behavioral1/memory/968-57-0x0000000007FD0000-0x0000000008088000-memory.dmp	rezer0

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation	enquiry20j20endooooo746e66682DIF.exe

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
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 968 set thread context of 820	968	enquiry20j20endooooo746e66682DIF.exe	30

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

System Information Discovery
T1082

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

pid	Process
816	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
820	enquiry20j20endooooo746e66682DIF.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
820	enquiry20j20endooooo746e66682DIF.exe
820	enquiry20j20endooooo746e66682DIF.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	968	enquiry20j20endooooo746e66682DIF.exe
Token: SeDebugPrivilege	820	enquiry20j20endooooo746e66682DIF.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
820	enquiry20j20endooooo746e66682DIF.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 968 wrote to memory of 816	968	enquiry20j20endooooo746e66682DIF.exe	28
PID 968 wrote to memory of 816	968	enquiry20j20endooooo746e66682DIF.exe	28
PID 968 wrote to memory of 816	968	enquiry20j20endooooo746e66682DIF.exe	28
PID 968 wrote to memory of 816	968	enquiry20j20endooooo746e66682DIF.exe	28
PID 968 wrote to memory of 820	968	enquiry20j20endooooo746e66682DIF.exe	30
PID 968 wrote to memory of 820	968	enquiry20j20endooooo746e66682DIF.exe	30
PID 968 wrote to memory of 820	968	enquiry20j20endooooo746e66682DIF.exe	30
PID 968 wrote to memory of 820	968	enquiry20j20endooooo746e66682DIF.exe	30
PID 968 wrote to memory of 820	968	enquiry20j20endooooo746e66682DIF.exe	30
PID 968 wrote to memory of 820	968	enquiry20j20endooooo746e66682DIF.exe	30
PID 968 wrote to memory of 820	968	enquiry20j20endooooo746e66682DIF.exe	30
PID 968 wrote to memory of 820	968	enquiry20j20endooooo746e66682DIF.exe	30
PID 968 wrote to memory of 820	968	enquiry20j20endooooo746e66682DIF.exe	30

C:\Users\Admin\AppData\Local\Temp\enquiry20j20endooooo746e66682DIF.exe
"C:\Users\Admin\AppData\Local\Temp\enquiry20j20endooooo746e66682DIF.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:968
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vpwFiobjtAs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7791.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:816
- C:\Users\Admin\AppData\Local\Temp\enquiry20j20endooooo746e66682DIF.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:820

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp7791.tmp

Filesize
1KB

MD5
5ed839f774941e220ff540029d22bb3c

SHA1
94e0628f6e5dba767a828e289f676c472e7d9905

SHA256
0f45d4aca1c11748c61b7ec3705d02bbcdfc65c1054369e142c63d77fa98ebea

SHA512
90b9fa135ba800694d0fd070efa4b650fec441af465c565eb34d0e04dc216a12f3d48e22511edc150a96f05b848794c7ec4f8b416c4bedda3c2463aa81993a15

Download Submit
memory/820-83-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-64-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-582-0x0000000001005000-0x0000000001016000-memory.dmp

Filesize
68KB

Download
memory/820-87-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-580-0x00000000008B0000-0x00000000008F4000-memory.dmp

Filesize
272KB

Download
memory/820-91-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-62-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-89-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-65-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-66-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-69-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-71-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-73-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-75-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-77-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-79-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-81-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-123-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-85-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-121-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-119-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-61-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-93-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-95-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-97-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-99-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-101-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-103-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-105-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-107-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-109-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-111-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-113-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-115-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/820-117-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/968-57-0x0000000007FD0000-0x0000000008088000-memory.dmp

Filesize
736KB

Download
memory/968-55-0x0000000075B61000-0x0000000075B63000-memory.dmp

Filesize
8KB

Download
memory/968-54-0x0000000001270000-0x0000000001376000-memory.dmp

Filesize
1.0MB

Download
memory/968-60-0x0000000008270000-0x0000000008320000-memory.dmp

Filesize
704KB

Download
memory/968-56-0x0000000000960000-0x0000000000968000-memory.dmp

Filesize
32KB

Download