37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87

Analysis

max time kernel
16s
max time network
144s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
30-06-2024 20:24

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General

Target

37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe
Size

72KB
MD5

9c1a8e229ef0c0d9c157c42cd5373581
SHA1

5e84fff657233bd58558d65b10eb321fbbf6b2cd
SHA256

37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87
SHA512

91e124b5d86507c9dc0ba4cb3c704636b60689a6741b6475e1319ce9f5012d8635c9f93fca28a2fd7659cbf81c6e539d3fdf03c4f0cbe1380557f852d1ec61d8
SSDEEP

768:qGHV45EDE477AZbUJx0rZGE3jCELoiMMj6hZ3nE+EXVmkDbjRL8Khc15Z6J1S:qG14P477AxUYrZGoC09k0SkTRHhWqP

Score

9^/10

bootkit persistence spyware stealer

Malware Config

Signatures

Detects executables containing base64 encoded User Agent 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2440-17-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2440-19-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2440-20-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow pid process

5 2440 rundll32.exe
6 2440 rundll32.exe
Deletes itself 1 IoCs

Processes:

anwew.exe

pid process

1780 anwew.exe
Executes dropped EXE 1 IoCs

Processes:

anwew.exe

pid process

1780 anwew.exe
Loads dropped DLL 4 IoCs

Processes:

rundll32.exe

pid process

2440 rundll32.exe
2440 rundll32.exe
2440 rundll32.exe
2440 rundll32.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

flow	pid	process
5	2440	rundll32.exe
6	2440	rundll32.exe

pid	process
1780	anwew.exe

pid	process
1780	anwew.exe

pid	process
2440	rundll32.exe
2440	rundll32.exe
2440	rundll32.exe
2440	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\ehvxs\\vmtswrax.dll\",init"	rundll32.exe

Enumerates connected drives 3 TTPs 2 IoCs
Attempts to read the root path of hard drives other than the default C: drive.

Query Registry
T1012

Peripheral Device Discovery
T1120

System Information Discovery
T1082

Processes:

rundll32.exe

description ioc process

File opened (read-only) \??\a: rundll32.exe
File opened (read-only) \??\b: rundll32.exe
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
bootkit persistence

Bootkit
T1542.003

Processes:

rundll32.exe

description ioc process

File opened for modification \??\PHYSICALDRIVE0 rundll32.exe

description	ioc	process
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe

description	ioc	process
File opened for modification	\??\PHYSICALDRIVE0	rundll32.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1960 PING.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

2440 rundll32.exe
2440 rundll32.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32.exe

description pid process

Token: SeDebugPrivilege 2440 rundll32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exeanwew.exe

pid process

2392 37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe
1780 anwew.exe

pid	process
1960	PING.EXE

pid	process
2440	rundll32.exe
2440	rundll32.exe

description	pid	process
Token: SeDebugPrivilege	2440	rundll32.exe

pid	process
2392	37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe
1780	anwew.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.execmd.exeanwew.exe

description	pid	process	target process
PID 2392 wrote to memory of 2200	2392	37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe	cmd.exe
PID 2392 wrote to memory of 2200	2392	37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe	cmd.exe
PID 2392 wrote to memory of 2200	2392	37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe	cmd.exe
PID 2392 wrote to memory of 2200	2392	37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe	cmd.exe
PID 2200 wrote to memory of 1960	2200	cmd.exe	PING.EXE
PID 2200 wrote to memory of 1960	2200	cmd.exe	PING.EXE
PID 2200 wrote to memory of 1960	2200	cmd.exe	PING.EXE
PID 2200 wrote to memory of 1960	2200	cmd.exe	PING.EXE
PID 2200 wrote to memory of 1780	2200	cmd.exe	anwew.exe
PID 2200 wrote to memory of 1780	2200	cmd.exe	anwew.exe
PID 2200 wrote to memory of 1780	2200	cmd.exe	anwew.exe
PID 2200 wrote to memory of 1780	2200	cmd.exe	anwew.exe
PID 1780 wrote to memory of 2440	1780	anwew.exe	rundll32.exe
PID 1780 wrote to memory of 2440	1780	anwew.exe	rundll32.exe
PID 1780 wrote to memory of 2440	1780	anwew.exe	rundll32.exe
PID 1780 wrote to memory of 2440	1780	anwew.exe	rundll32.exe
PID 1780 wrote to memory of 2440	1780	anwew.exe	rundll32.exe
PID 1780 wrote to memory of 2440	1780	anwew.exe	rundll32.exe
PID 1780 wrote to memory of 2440	1780	anwew.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe
"C:\Users\Admin\AppData\Local\Temp\37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2392

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&c:\anwew.exe "C:\Users\Admin\AppData\Local\Temp\37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2200

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
3⤵
- Runs ping.exe
PID:1960

\??\c:\anwew.exe
c:\anwew.exe "C:\Users\Admin\AppData\Local\Temp\37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe"
3⤵
- Deletes itself
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1780

\??\c:\windows\SysWOW64\rundll32.exe
c:\windows\system32\rundll32.exe "c:\ehvxs\vmtswrax.dll",init c:\anwew.exe
4⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2440

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

\??\c:\anwew.exe
Filesize
72KB

MD5
d5136a93da16213473cbc241924e4971

SHA1
2c0d5deae14c275314be918e50a904db8e5261c6

SHA256
16ef8e0274d0be50c70553d28c18df1564557e771b6bd970d421330752537847

SHA512
8f68fcc3b309122a61fe8370e03674cd1604c4a276793e4dd3ad6a04002d29903f18ee4e37ded429824896d4cfdb44a5594781d01e59bc7a07dcd6a05cb49b9e

Download Submit
\??\c:\ehvxs\vmtswrax.dll
Filesize
42KB

MD5
36e3fb5964d663272cf1169e1e1ca478

SHA1
58115e08b49505bcbbb5c88a28a86222ba18d5d4

SHA256
c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7

SHA512
daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442

Download Submit
memory/1780-8-0x0000000000360000-0x0000000000361000-memory.dmp

Filesize
4KB

Download
memory/1780-10-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2200-7-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2200-6-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2392-3-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2392-0-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2392-1-0x0000000000260000-0x0000000000261000-memory.dmp

Filesize
4KB

Download
memory/2440-16-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/2440-17-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/2440-18-0x0000000010021000-0x0000000010022000-memory.dmp

Filesize
4KB

Download
memory/2440-19-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/2440-20-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download