a2ee84969e3b0452fc4b442fe460db7d52074837ca89082b6d1b5e80b7a207fc

General

Target

a2ee84969e3b0452fc4b442fe460db7d52074837ca89082b6d1b5e80b7a207fc.exe
Size

212KB
MD5

c519c452d5ac5246a2f96de849fef4f8
SHA1

c097de1b687185e428c12cc63acbce2077332c3f
SHA256

a2ee84969e3b0452fc4b442fe460db7d52074837ca89082b6d1b5e80b7a207fc
SHA512

d1f9dbed573e37e473478320218c65de05759a96e10b0735072861eeea434f5e111cf46b50d275f67ff949430925e19dfa84a54411f45f73cdb6eb1713f92f67
SSDEEP

3072:uqPL1/7w6ZAs+VBKSniXS4Rz+Clmn2tXauPxshFUf8W9tr:7QVAnYWpauPxsRYt

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1116	3b615026.exe

Sets DLL path for service in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\FastUserSwitchingCompatibility\Parameters\ServiceDll = "C:\\Windows\\system32\\FastUserSwitchingCompatibility.dll"	3b615026.exe

UPX packed file 8 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x000a000000012738-55.dat	upx
behavioral1/files/0x000a000000012738-57.dat	upx
behavioral1/files/0x00080000000133e5-58.dat	upx
behavioral1/memory/1116-62-0x00000000001B0000-0x00000000001D5000-memory.dmp	upx
behavioral1/memory/1116-64-0x0000000077000000-0x0000000077060000-memory.dmp	upx
behavioral1/files/0x000800000001332a-68.dat	upx
behavioral1/files/0x000800000001332a-69.dat	upx
behavioral1/memory/1920-72-0x0000000074E30000-0x0000000074E55000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
1116	3b615026.exe
1920	svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll	3b615026.exe
File opened for modification	C:\Windows\SysWOW64\178004CC.tmp	3b615026.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1116	3b615026.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1792 wrote to memory of 1116	1792	a2ee84969e3b0452fc4b442fe460db7d52074837ca89082b6d1b5e80b7a207fc.exe	28
PID 1792 wrote to memory of 1116	1792	a2ee84969e3b0452fc4b442fe460db7d52074837ca89082b6d1b5e80b7a207fc.exe	28
PID 1792 wrote to memory of 1116	1792	a2ee84969e3b0452fc4b442fe460db7d52074837ca89082b6d1b5e80b7a207fc.exe	28
PID 1792 wrote to memory of 1116	1792	a2ee84969e3b0452fc4b442fe460db7d52074837ca89082b6d1b5e80b7a207fc.exe	28

C:\Users\Admin\AppData\Local\Temp\a2ee84969e3b0452fc4b442fe460db7d52074837ca89082b6d1b5e80b7a207fc.exe
"C:\Users\Admin\AppData\Local\Temp\a2ee84969e3b0452fc4b442fe460db7d52074837ca89082b6d1b5e80b7a207fc.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1792
- C:\3b615026.exe
  C:\3b615026.exe
  2⤵
  - Executes dropped EXE
  - Sets DLL path for service in the registry
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  PID:1116

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k netsvcs
1⤵
- Loads dropped DLL
PID:1920

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\3b615026.exe

Filesize
134KB

MD5
e6f0ea380a2bb37ea1a20983ae18df3a

SHA1
9fa36c33a5017235715426a590bad849f146ce6e

SHA256
bbdfd233ea67ef81fdddfa3730fdb16958e83702706eafe515ac5d148b97e9fe

SHA512
0da13733d4078c6b2f0cedd14b8d94401d800e040d24c74f718078c421c78a3f1d6c6c5a1edc8cf08d39c812000778fc489af5d75f3fa7c67f389a807e2f19c7

Download Submit
C:\3b615026.exe

Filesize
134KB

MD5
e6f0ea380a2bb37ea1a20983ae18df3a

SHA1
9fa36c33a5017235715426a590bad849f146ce6e

SHA256
bbdfd233ea67ef81fdddfa3730fdb16958e83702706eafe515ac5d148b97e9fe

SHA512
0da13733d4078c6b2f0cedd14b8d94401d800e040d24c74f718078c421c78a3f1d6c6c5a1edc8cf08d39c812000778fc489af5d75f3fa7c67f389a807e2f19c7

Download Submit
C:\Users\Infotmp.txt

Filesize
720B

MD5
6490fc614f572b4546610b92834f4ee3

SHA1
41dc7698b712d81dffa22aa5fdbfd91057ea5cf1

SHA256
1a8959910f0a5a9cd0b3d22aa077fa4a5eceb3c79d677cfd41fd2ee0ffa9955e

SHA512
6c36f6c4bb9a9b835b0b9e6955325b73b9979b8c67b1582285d98aff0ae6927b29a8e67be722bf273b25e6261c67afea0d11b6a7dcf3eb4884ca51c592338075

Download Submit
\??\c:\windows\SysWOW64\fastuserswitchingcompatibility.dll

Filesize
134KB

MD5
9cb478e6b56f7c556cf3d718361c65a3

SHA1
8905afb6f4fbce50072b7a54144a2f7fac55caeb

SHA256
4738bc0f4c18c2ad7ab4826718919e2329a4ae3ca8749904f9814f738f5ebade

SHA512
7bf4570f91d692037f28767e969202d603f6787d72c6c13639999a028b74567668de605ab22d03acfc43bd2a25a6fe57cb2c9765498e7be51e2eb0f32c69204b

Download Submit
\Windows\SysWOW64\178004CC.tmp

Filesize
134KB

MD5
9cb478e6b56f7c556cf3d718361c65a3

SHA1
8905afb6f4fbce50072b7a54144a2f7fac55caeb

SHA256
4738bc0f4c18c2ad7ab4826718919e2329a4ae3ca8749904f9814f738f5ebade

SHA512
7bf4570f91d692037f28767e969202d603f6787d72c6c13639999a028b74567668de605ab22d03acfc43bd2a25a6fe57cb2c9765498e7be51e2eb0f32c69204b

Download Submit
\Windows\SysWOW64\FastUserSwitchingCompatibility.dll

Filesize
134KB

MD5
9cb478e6b56f7c556cf3d718361c65a3

SHA1
8905afb6f4fbce50072b7a54144a2f7fac55caeb

SHA256
4738bc0f4c18c2ad7ab4826718919e2329a4ae3ca8749904f9814f738f5ebade

SHA512
7bf4570f91d692037f28767e969202d603f6787d72c6c13639999a028b74567668de605ab22d03acfc43bd2a25a6fe57cb2c9765498e7be51e2eb0f32c69204b

Download Submit
memory/1116-62-0x00000000001B0000-0x00000000001D5000-memory.dmp

Filesize
148KB

Download
memory/1116-63-0x0000000002110000-0x0000000006110000-memory.dmp

Filesize
64.0MB

Download
memory/1116-64-0x0000000077000000-0x0000000077060000-memory.dmp

Filesize
384KB

Download
memory/1116-65-0x0000000002110000-0x0000000006110000-memory.dmp

Filesize
64.0MB

Download
memory/1116-66-0x0000000077000000-0x0000000077060000-memory.dmp

Filesize
384KB

Download
memory/1116-56-0x0000000076381000-0x0000000076383000-memory.dmp

Filesize
8KB

Download
memory/1116-73-0x0000000077000000-0x0000000077060000-memory.dmp

Filesize
384KB

Download
memory/1792-61-0x00000000000F0000-0x0000000000115000-memory.dmp

Filesize
148KB

Download
memory/1792-67-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1792-60-0x00000000000F0000-0x0000000000115000-memory.dmp

Filesize
148KB

Download
memory/1792-59-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1920-72-0x0000000074E30000-0x0000000074E55000-memory.dmp

Filesize
148KB

Download

Analysis

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