455a6f589061a7e546ca427fefcd40b03e1b88cba9e2b1625b899ce6f59ded42

General

Target

455a6f589061a7e546ca427fefcd40b03e1b88cba9e2b1625b899ce6f59ded42.exe
Size

380KB
MD5

57d27b148b912ecb55bb811f51848a60
SHA1

34ef8b32a0d57c52da584159d54127bc3b8ac14d
SHA256

455a6f589061a7e546ca427fefcd40b03e1b88cba9e2b1625b899ce6f59ded42
SHA512

2bf738f454def8d1ee835067f85a3d14a0effb4d011281b51b0c076d31051399f45576fbba6388ba44b46783e89809095050e7368235616ea2b62ed8893beb8b
SSDEEP

6144:zv3AWPlKALXqo1jmUZxL6xQGQm9UmM7I+6cwv4Yw+/YOHXYJn:z/AWxLXqs76ve7I+Lyk+/XY

Score

8^/10

aspackv2 persistence upx

Malware Config

Signatures

ASPack v2.12-2.42 4 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral2/files/0x0003000000000727-134.dat	aspack_v212_v242
behavioral2/files/0x0003000000000727-133.dat	aspack_v212_v242
behavioral2/files/0x000400000000072f-140.dat	aspack_v212_v242
behavioral2/files/0x000400000000072f-141.dat	aspack_v212_v242

Executes dropped EXE 1 IoCs

pid	Process
1444	08e206ce.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"	08e206ce.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0003000000000727-134.dat	upx
behavioral2/files/0x0003000000000727-133.dat	upx
behavioral2/memory/1444-136-0x0000000000560000-0x0000000000586000-memory.dmp	upx
behavioral2/memory/1444-135-0x0000000000560000-0x0000000000586000-memory.dmp	upx
behavioral2/memory/1444-138-0x0000000000560000-0x0000000000586000-memory.dmp	upx
behavioral2/files/0x000400000000072f-140.dat	upx
behavioral2/files/0x000400000000072f-141.dat	upx
behavioral2/memory/440-142-0x0000000074C40000-0x0000000074C66000-memory.dmp	upx
behavioral2/memory/440-143-0x0000000074C40000-0x0000000074C66000-memory.dmp	upx
behavioral2/memory/440-144-0x0000000074C40000-0x0000000074C66000-memory.dmp	upx
behavioral2/memory/440-146-0x0000000074C40000-0x0000000074C66000-memory.dmp	upx

Loads dropped DLL 1 IoCs

pid	Process
440	svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\6A210980.tmp	08e206ce.exe
File opened for modification	C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll	08e206ce.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
5048	5088	WerFault.exe	35
1940	5088	WerFault.exe	35

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1444	08e206ce.exe
1444	08e206ce.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5088 wrote to memory of 1444	5088	455a6f589061a7e546ca427fefcd40b03e1b88cba9e2b1625b899ce6f59ded42.exe	82
PID 5088 wrote to memory of 1444	5088	455a6f589061a7e546ca427fefcd40b03e1b88cba9e2b1625b899ce6f59ded42.exe	82
PID 5088 wrote to memory of 1444	5088	455a6f589061a7e546ca427fefcd40b03e1b88cba9e2b1625b899ce6f59ded42.exe	82
PID 5088 wrote to memory of 5048	5088	455a6f589061a7e546ca427fefcd40b03e1b88cba9e2b1625b899ce6f59ded42.exe	87
PID 5088 wrote to memory of 5048	5088	455a6f589061a7e546ca427fefcd40b03e1b88cba9e2b1625b899ce6f59ded42.exe	87
PID 5088 wrote to memory of 5048	5088	455a6f589061a7e546ca427fefcd40b03e1b88cba9e2b1625b899ce6f59ded42.exe	87

C:\Users\Admin\AppData\Local\Temp\455a6f589061a7e546ca427fefcd40b03e1b88cba9e2b1625b899ce6f59ded42.exe
"C:\Users\Admin\AppData\Local\Temp\455a6f589061a7e546ca427fefcd40b03e1b88cba9e2b1625b899ce6f59ded42.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5088
- C:\08e206ce.exe
  C:\08e206ce.exe
  2⤵
  - Executes dropped EXE
  - Sets DLL path for service in the registry
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  PID:1444
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5088 -s 388
  2⤵
  - Program crash
  PID:5048
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5088 -s 388
  2⤵
  - Program crash
  PID:1940

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k netsvcs -s FastUserSwitchingCompatibility
1⤵
- Loads dropped DLL
PID:440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5088 -ip 5088
1⤵
PID:460

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:\08e206ce.exe

Filesize
96KB

MD5
5fc1a7fd168d8ff7329d428127451ee2

SHA1
1ef1777fa9ac1eb70f9473af5208d9a91a1fe1f9

SHA256
cddfa0352d36b9335d39ae39c28dccf1c7ed661816b431e19ae876dc2c6636b0

SHA512
6f2ec89b0ee8e26a10ed96718e4e2566725511ede4fadace5a280730ea99347b4248eac2b26e3d1cf1c1ac4be9dcb9cc8240912ab8b24173612b3daa7a47a819

Download Submit
C:\08e206ce.exe

Filesize
96KB

MD5
5fc1a7fd168d8ff7329d428127451ee2

SHA1
1ef1777fa9ac1eb70f9473af5208d9a91a1fe1f9

SHA256
cddfa0352d36b9335d39ae39c28dccf1c7ed661816b431e19ae876dc2c6636b0

SHA512
6f2ec89b0ee8e26a10ed96718e4e2566725511ede4fadace5a280730ea99347b4248eac2b26e3d1cf1c1ac4be9dcb9cc8240912ab8b24173612b3daa7a47a819

Download Submit
C:\Users\Infotmp.txt

Filesize
720B

MD5
152f67b858d9c2d5b75a412814c116f1

SHA1
4233b33b644d14c50f6453112934ac08684fab4c

SHA256
34cf1d20fe57e4a3a257cc841aacaca664ff5a9e79143a857f4bc52adcf44d17

SHA512
b929870aa3caac0f05969ac6e9bb5921423c89fddb7487a5d138ac8f60b439dcf8ed710ca37a36f99fc3b9a5ec1ccf0f281f649ce3d620f8f22dfe32f7300251

Download Submit
C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll

Filesize
96KB

MD5
f80815ff6725e01c204d1a4d245f87e2

SHA1
629779a2cf984a3e0968287b54b875e20a4dff8d

SHA256
9bde7a3eff6b1d858df3aa33960b15799058673011cab8e754215064ef48522c

SHA512
5b91dc8eee77d9e3deb409bd20aa0533c9cd6ee7f0256c85e6b8294d6edb344e14f10e1312e507b89fcb2df8afb4b71eaad3737435225a77c4a86d7b3ebc89ef

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

Filesize
96KB

MD5
f80815ff6725e01c204d1a4d245f87e2

SHA1
629779a2cf984a3e0968287b54b875e20a4dff8d

SHA256
9bde7a3eff6b1d858df3aa33960b15799058673011cab8e754215064ef48522c

SHA512
5b91dc8eee77d9e3deb409bd20aa0533c9cd6ee7f0256c85e6b8294d6edb344e14f10e1312e507b89fcb2df8afb4b71eaad3737435225a77c4a86d7b3ebc89ef

Download Submit
memory/440-144-0x0000000074C40000-0x0000000074C66000-memory.dmp

Filesize
152KB

Download
memory/440-142-0x0000000074C40000-0x0000000074C66000-memory.dmp

Filesize
152KB

Download
memory/440-143-0x0000000074C40000-0x0000000074C66000-memory.dmp

Filesize
152KB

Download
memory/440-146-0x0000000074C40000-0x0000000074C66000-memory.dmp

Filesize
152KB

Download
memory/1444-138-0x0000000000560000-0x0000000000586000-memory.dmp

Filesize
152KB

Download
memory/1444-139-0x0000000003130000-0x0000000007130000-memory.dmp

Filesize
64.0MB

Download
memory/1444-135-0x0000000000560000-0x0000000000586000-memory.dmp

Filesize
152KB

Download
memory/1444-136-0x0000000000560000-0x0000000000586000-memory.dmp

Filesize
152KB

Download
memory/5088-137-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/5088-148-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download

Analysis

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