37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87

Analysis

max time kernel
147s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-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 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1232-14-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1232-16-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Blocklisted process makes network request 3 IoCs

Processes:

rundll32.exe

flow pid process

30 1232 rundll32.exe
31 1232 rundll32.exe
47 1232 rundll32.exe
Deletes itself 1 IoCs

Processes:

dpsunzrm.exe

pid process

1436 dpsunzrm.exe
Executes dropped EXE 1 IoCs

Processes:

dpsunzrm.exe

pid process

1436 dpsunzrm.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

1232 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
30	1232	rundll32.exe
31	1232	rundll32.exe
47	1232	rundll32.exe

pid	process
1436	dpsunzrm.exe

pid	process
1436	dpsunzrm.exe

pid	process
1232	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-1-5-21-200405930-3877336739-3533750831-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\zceru\\bytgifev.dll\",init"	rundll32.exe

Enumerates connected drives 3 TTPs 23 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)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	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 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

4100 PING.EXE
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

rundll32.exe

pid process

1232 rundll32.exe
1232 rundll32.exe
1232 rundll32.exe
1232 rundll32.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32.exe

description pid process

Token: SeDebugPrivilege 1232 rundll32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exedpsunzrm.exe

pid process

2116 37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe
1436 dpsunzrm.exe

pid	process
4100	PING.EXE

pid	process
1232	rundll32.exe
1232	rundll32.exe
1232	rundll32.exe
1232	rundll32.exe

description	pid	process
Token: SeDebugPrivilege	1232	rundll32.exe

pid	process
2116	37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe
1436	dpsunzrm.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.execmd.exedpsunzrm.exe

description	pid	process	target process
PID 2116 wrote to memory of 4948	2116	37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe	cmd.exe
PID 2116 wrote to memory of 4948	2116	37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe	cmd.exe
PID 2116 wrote to memory of 4948	2116	37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe	cmd.exe
PID 4948 wrote to memory of 4100	4948	cmd.exe	PING.EXE
PID 4948 wrote to memory of 4100	4948	cmd.exe	PING.EXE
PID 4948 wrote to memory of 4100	4948	cmd.exe	PING.EXE
PID 4948 wrote to memory of 1436	4948	cmd.exe	dpsunzrm.exe
PID 4948 wrote to memory of 1436	4948	cmd.exe	dpsunzrm.exe
PID 4948 wrote to memory of 1436	4948	cmd.exe	dpsunzrm.exe
PID 1436 wrote to memory of 1232	1436	dpsunzrm.exe	rundll32.exe
PID 1436 wrote to memory of 1232	1436	dpsunzrm.exe	rundll32.exe
PID 1436 wrote to memory of 1232	1436	dpsunzrm.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:2116

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&c:\dpsunzrm.exe "C:\Users\Admin\AppData\Local\Temp\37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:4948

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
3⤵
- Runs ping.exe
PID:4100

\??\c:\dpsunzrm.exe
c:\dpsunzrm.exe "C:\Users\Admin\AppData\Local\Temp\37066f4ec4e81a00048555a6680d05edc1b2e0b80d965702cd699c9babe7bd87.exe"
3⤵
- Deletes itself
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1436

\??\c:\windows\SysWOW64\rundll32.exe
c:\windows\system32\rundll32.exe "c:\zceru\bytgifev.dll",init c:\dpsunzrm.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:1232

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\dpsunzrm.exe
Filesize
72KB

MD5
9715874914528fc79d5d2cb9b5d4c61e

SHA1
82f0fff2f6a3890a507eb6cc198476d317e5b120

SHA256
03bc78c1aee61e0b9d852601923adfcc5f72e225a7ff4db10dfac9bd38257638

SHA512
5ea8a0f88d469b5c965a46e5da723dab8b9326f102a6ff1c212631a2a25b275c8ff8fdf41e4fadcfdb5cd1161465a342718fdb7a000d68db6107ce47b5ea9568

Download Submit
C:\zceru\bytgifev.dll
Filesize
42KB

MD5
36e3fb5964d663272cf1169e1e1ca478

SHA1
58115e08b49505bcbbb5c88a28a86222ba18d5d4

SHA256
c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7

SHA512
daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442

Download Submit
memory/1232-14-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/1232-13-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/1232-15-0x0000000001570000-0x0000000001571000-memory.dmp

Filesize
4KB

Download
memory/1232-16-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/1232-17-0x0000000001570000-0x0000000001571000-memory.dmp

Filesize
4KB

Download
memory/1436-7-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1436-8-0x00000000020E0000-0x00000000020E1000-memory.dmp

Filesize
4KB

Download
memory/1436-10-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2116-3-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2116-1-0x0000000000930000-0x0000000000931000-memory.dmp

Filesize
4KB

Download
memory/2116-0-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download