emotet | becd302b33c38ca20a179ba9c54c6f47e6edfb8fa3e50ba9240e5ca81d1ec709

Resubmissions

12-07-2021 14:33

210712-ltf9fxazx2 10

18-06-2021 16:56

210618-wp8cjl23ls 10

Analysis

max time kernel
99s
max time network
112s
platform
windows10_x64
resource
win10v20210408
submitted
12-07-2021 14:33

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General

Target

b.exe
Size

212KB
MD5

6afa5dec92e5dead749079cbac762b33
SHA1

baa768c3cdc1b1dac9f4b556a3757d17d68b6498
SHA256

becd302b33c38ca20a179ba9c54c6f47e6edfb8fa3e50ba9240e5ca81d1ec709
SHA512

d24333d5f67d66752484f47191f56b74ca9088ac28bdd97b9b24408737ac6b20e5d8446ff4069628b5c7eee1dcee2e69028e1ac9fe66bdbf2db8adfe362ffd3b

Score

10^/10

emotet banker trojan

Malware Config

Signatures

Emotet
Emotet is a trojan that is primarily spread through spam emails.
trojan banker emotet

Drops file in System32 directory 5 IoCs

Processes:

procsrv.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\counters2.dat	procsrv.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	procsrv.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	procsrv.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	procsrv.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	procsrv.exe

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

System Information Discovery
T1082

Modifies data under HKEY_USERS 3 IoCs

Processes:

procsrv.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	procsrv.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	procsrv.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	procsrv.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

procsrv.exe

pid process

3680 procsrv.exe
3680 procsrv.exe
3680 procsrv.exe
3680 procsrv.exe
3680 procsrv.exe
3680 procsrv.exe
Suspicious behavior: RenamesItself 1 IoCs

Processes:

b.exe

pid process

4080 b.exe

pid	process
3680	procsrv.exe
3680	procsrv.exe
3680	procsrv.exe
3680	procsrv.exe
3680	procsrv.exe
3680	procsrv.exe

pid	process
4080	b.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

b.exeprocsrv.exe

description	pid	process	target process
PID 632 wrote to memory of 4080	632	b.exe	b.exe
PID 632 wrote to memory of 4080	632	b.exe	b.exe
PID 632 wrote to memory of 4080	632	b.exe	b.exe
PID 2692 wrote to memory of 3680	2692	procsrv.exe	procsrv.exe
PID 2692 wrote to memory of 3680	2692	procsrv.exe	procsrv.exe
PID 2692 wrote to memory of 3680	2692	procsrv.exe	procsrv.exe

C:\Users\Admin\AppData\Local\Temp\b.exe
"C:\Users\Admin\AppData\Local\Temp\b.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:632

C:\Users\Admin\AppData\Local\Temp\b.exe
"C:\Users\Admin\AppData\Local\Temp\b.exe"
2⤵
- Suspicious behavior: RenamesItself
PID:4080

C:\Windows\SysWOW64\procsrv.exe
C:\Windows\SysWOW64\procsrv.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:2692

C:\Windows\SysWOW64\procsrv.exe
"C:\Windows\SysWOW64\procsrv.exe"
2⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
PID:3680

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/632-114-0x0000000002810000-0x000000000281D000-memory.dmp

Filesize
52KB

Download
memory/632-115-0x0000000002820000-0x000000000282D000-memory.dmp

Filesize
52KB

Download
memory/632-118-0x0000000002820000-0x000000000282D000-memory.dmp

Filesize
52KB

Download
memory/2692-124-0x00000000014A0000-0x00000000014AD000-memory.dmp

Filesize
52KB

Download
memory/2692-127-0x00000000014A0000-0x00000000014AD000-memory.dmp

Filesize
52KB

Download
memory/3680-128-0x0000000000000000-mapping.dmp

Download
memory/4080-119-0x0000000000000000-mapping.dmp

Download
memory/4080-120-0x00000000027F0000-0x00000000027FD000-memory.dmp

Filesize
52KB

Download
memory/4080-123-0x00000000027F0000-0x00000000027FD000-memory.dmp

Filesize
52KB

Download