ec6db9498a042427a02922defd858f55e092de676b1e7f1ef90900168d14f8c2

General

Target

ec6db9498a042427a02922defd858f55e092de676b1e7f1ef90900168d14f8c2.exe
Size

228KB
MD5

a2210286de69f28dcf7ac80a008b7b30
SHA1

2a52ecd31fd396034fc5b17652f36867ce4d1e4f
SHA256

ec6db9498a042427a02922defd858f55e092de676b1e7f1ef90900168d14f8c2
SHA512

555c92df776c31ae2ddf8199944e0773f7d8e55f16a8c7622cc03870c6e0b7ae80350b8648ba0c347696fc06af426d1c30a362da86c19d35d263171820fc01e3
SSDEEP

6144:MvnR60RV2tZdSNVzNP6KkIR60RV2tZdSNVz:M5LVedwNd7LVedw

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/0x0007000000022dff-134.dat	aspack_v212_v242
behavioral2/files/0x0007000000022dff-135.dat	aspack_v212_v242
behavioral2/files/0x0006000000022e07-139.dat	aspack_v212_v242
behavioral2/files/0x0006000000022e07-140.dat	aspack_v212_v242

Executes dropped EXE 1 IoCs

pid	Process
2080	53d538cc.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"	53d538cc.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0007000000022dff-134.dat	upx
behavioral2/files/0x0007000000022dff-135.dat	upx
behavioral2/memory/2080-136-0x0000000000650000-0x0000000000674000-memory.dmp	upx
behavioral2/memory/2080-137-0x0000000000650000-0x0000000000674000-memory.dmp	upx
behavioral2/files/0x0006000000022e07-139.dat	upx
behavioral2/files/0x0006000000022e07-140.dat	upx
behavioral2/memory/5024-141-0x0000000075490000-0x00000000754B4000-memory.dmp	upx
behavioral2/memory/5024-143-0x0000000075490000-0x00000000754B4000-memory.dmp	upx

Loads dropped DLL 1 IoCs

pid	Process
5024	Svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\23F709FC.tmp	53d538cc.exe
File opened for modification	C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll	53d538cc.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4972	4056	WerFault.exe	79

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2080	53d538cc.exe
2080	53d538cc.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4056 wrote to memory of 2080	4056	ec6db9498a042427a02922defd858f55e092de676b1e7f1ef90900168d14f8c2.exe	80
PID 4056 wrote to memory of 2080	4056	ec6db9498a042427a02922defd858f55e092de676b1e7f1ef90900168d14f8c2.exe	80
PID 4056 wrote to memory of 2080	4056	ec6db9498a042427a02922defd858f55e092de676b1e7f1ef90900168d14f8c2.exe	80

C:\Users\Admin\AppData\Local\Temp\ec6db9498a042427a02922defd858f55e092de676b1e7f1ef90900168d14f8c2.exe
"C:\Users\Admin\AppData\Local\Temp\ec6db9498a042427a02922defd858f55e092de676b1e7f1ef90900168d14f8c2.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4056
- C:\53d538cc.exe
  C:\53d538cc.exe
  2⤵
  - Executes dropped EXE
  - Sets DLL path for service in the registry
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  PID:2080
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4056 -s 400
  2⤵
  - Program crash
  PID:4972

C:\Windows\SysWOW64\Svchost.exe
C:\Windows\SysWOW64\Svchost.exe -k netsvcs -s FastUserSwitchingCompatibility
1⤵
- Loads dropped DLL
PID:5024

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4056 -ip 4056
1⤵
PID:2700

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

Loading Replay Monitor...

Downloads

C:\53d538cc.exe

Filesize
79KB

MD5
9edd836f73a5aa1b844865a3b98814f9

SHA1
23ca95f159ddb968fb1c6f239f6d9fbcbc92efce

SHA256
18d783fecdedc087596077e9cbb242ead86266a44fa362f8712af71bb6a20388

SHA512
c2600d1cd2bb1c0f61fa1072694f6ccc0a8a182383911363b7333a82b42edf5e2999c3e4f0766fd345e0ff336b64c59f0b2a47d5736938ed3467f6b334e42731

Download Submit
C:\53d538cc.exe

Filesize
79KB

MD5
9edd836f73a5aa1b844865a3b98814f9

SHA1
23ca95f159ddb968fb1c6f239f6d9fbcbc92efce

SHA256
18d783fecdedc087596077e9cbb242ead86266a44fa362f8712af71bb6a20388

SHA512
c2600d1cd2bb1c0f61fa1072694f6ccc0a8a182383911363b7333a82b42edf5e2999c3e4f0766fd345e0ff336b64c59f0b2a47d5736938ed3467f6b334e42731

Download Submit
C:\Users\Infotmp.txt

Filesize
720B

MD5
0f19a826431c67637ce52903d5ec6933

SHA1
cdd7bff75dc846510227b4fff61b234833e95519

SHA256
aa219c2a33b09e38b3b2bbbfc65db98a2c53a7d2a6a820208bbca3eb82cbb71e

SHA512
9f84f82bb6add1653f9c7c6a410d849d22d04a62cf2966733c56fb791ddde9fdb3068ce61e8e2a38467c99b4fb1003d88e351d0c97b778661b799d1cc416f3ff

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

Filesize
79KB

MD5
8428a8d94dca536c2d3533d87f48c164

SHA1
d26e83a55bd507a35ab7a4d732160c24d68b56a3

SHA256
0279bc6ad6f3f6f20266eabde3718c85aa3c80a3cd647f1bb05f2640ebfebdb9

SHA512
0cd2f8465ff4222b22f791d71aa07b1ce97d9c430b2ae77de0de04f2aef42dd69545a90914c6a5c2bda4c775ee6523396dd4c49987b4dd9c2e4e98156a66fa35

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

Filesize
79KB

MD5
8428a8d94dca536c2d3533d87f48c164

SHA1
d26e83a55bd507a35ab7a4d732160c24d68b56a3

SHA256
0279bc6ad6f3f6f20266eabde3718c85aa3c80a3cd647f1bb05f2640ebfebdb9

SHA512
0cd2f8465ff4222b22f791d71aa07b1ce97d9c430b2ae77de0de04f2aef42dd69545a90914c6a5c2bda4c775ee6523396dd4c49987b4dd9c2e4e98156a66fa35

Download Submit
memory/2080-138-0x0000000002620000-0x0000000006620000-memory.dmp

Filesize
64.0MB

Download
memory/2080-137-0x0000000000650000-0x0000000000674000-memory.dmp

Filesize
144KB

Download
memory/2080-136-0x0000000000650000-0x0000000000674000-memory.dmp

Filesize
144KB

Download
memory/4056-132-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/4056-144-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/5024-141-0x0000000075490000-0x00000000754B4000-memory.dmp

Filesize
144KB

Download
memory/5024-143-0x0000000075490000-0x00000000754B4000-memory.dmp

Filesize
144KB

Download

Analysis

Sharing