4f876fa4790a310bc723de4df9e33c8969c19b42bd69bd68f42a6b8936fdf9db

General

Target

4f876fa4790a310bc723de4df9e33c8969c19b42bd69bd68f42a6b8936fdf9db.exe
Size

272KB
MD5

a266fc059400e33e5590b745f7d24290
SHA1

c2441a03b78ac87114c901f7bb484c994fe3df74
SHA256

4f876fa4790a310bc723de4df9e33c8969c19b42bd69bd68f42a6b8936fdf9db
SHA512

2400c5ba6a838632180aed72c79a21b1f6d0021b3ea0ec09e743da14aed772a87b337cd736874eb0760eca7a7e48eabe19f44dea3f7dd9b33b4e21f554cc3b29
SSDEEP

6144:NQVYR60RV2tZdSNVzNP6KkqR60RV2tZdSNVz:N2qLVedwNdZLVedw

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/0x000a000000022f4a-134.dat	aspack_v212_v242
behavioral2/files/0x000a000000022f4a-135.dat	aspack_v212_v242
behavioral2/files/0x0006000000022f68-139.dat	aspack_v212_v242
behavioral2/files/0x0006000000022f68-140.dat	aspack_v212_v242

Executes dropped EXE 1 IoCs

pid	Process
4792	46ab54d1.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"	46ab54d1.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000a000000022f4a-134.dat	upx
behavioral2/files/0x000a000000022f4a-135.dat	upx
behavioral2/memory/4792-136-0x0000000000300000-0x0000000000324000-memory.dmp	upx
behavioral2/memory/4792-137-0x0000000000300000-0x0000000000324000-memory.dmp	upx
behavioral2/files/0x0006000000022f68-139.dat	upx
behavioral2/files/0x0006000000022f68-140.dat	upx
behavioral2/memory/5052-141-0x0000000075340000-0x0000000075364000-memory.dmp	upx
behavioral2/memory/4792-144-0x0000000000300000-0x0000000000324000-memory.dmp	upx
behavioral2/memory/5052-143-0x0000000075340000-0x0000000075364000-memory.dmp	upx

Loads dropped DLL 1 IoCs

pid	Process
5052	Svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\296C0BF4.tmp	46ab54d1.exe
File opened for modification	C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll	46ab54d1.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2312	5068	WerFault.exe	79

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4792	46ab54d1.exe
4792	46ab54d1.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5068 wrote to memory of 4792	5068	4f876fa4790a310bc723de4df9e33c8969c19b42bd69bd68f42a6b8936fdf9db.exe	80
PID 5068 wrote to memory of 4792	5068	4f876fa4790a310bc723de4df9e33c8969c19b42bd69bd68f42a6b8936fdf9db.exe	80
PID 5068 wrote to memory of 4792	5068	4f876fa4790a310bc723de4df9e33c8969c19b42bd69bd68f42a6b8936fdf9db.exe	80

C:\Users\Admin\AppData\Local\Temp\4f876fa4790a310bc723de4df9e33c8969c19b42bd69bd68f42a6b8936fdf9db.exe
"C:\Users\Admin\AppData\Local\Temp\4f876fa4790a310bc723de4df9e33c8969c19b42bd69bd68f42a6b8936fdf9db.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5068
- C:\46ab54d1.exe
  C:\46ab54d1.exe
  2⤵
  - Executes dropped EXE
  - Sets DLL path for service in the registry
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  PID:4792
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5068 -s 444
  2⤵
  - Program crash
  PID:2312

C:\Windows\SysWOW64\Svchost.exe
C:\Windows\SysWOW64\Svchost.exe -k netsvcs -s FastUserSwitchingCompatibility
1⤵
- Loads dropped DLL
PID:5052

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 5068 -ip 5068
1⤵
PID:4904

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:\46ab54d1.exe

Filesize
79KB

MD5
9edd836f73a5aa1b844865a3b98814f9

SHA1
23ca95f159ddb968fb1c6f239f6d9fbcbc92efce

SHA256
18d783fecdedc087596077e9cbb242ead86266a44fa362f8712af71bb6a20388

SHA512
c2600d1cd2bb1c0f61fa1072694f6ccc0a8a182383911363b7333a82b42edf5e2999c3e4f0766fd345e0ff336b64c59f0b2a47d5736938ed3467f6b334e42731

Download Submit
C:\46ab54d1.exe

Filesize
79KB

MD5
9edd836f73a5aa1b844865a3b98814f9

SHA1
23ca95f159ddb968fb1c6f239f6d9fbcbc92efce

SHA256
18d783fecdedc087596077e9cbb242ead86266a44fa362f8712af71bb6a20388

SHA512
c2600d1cd2bb1c0f61fa1072694f6ccc0a8a182383911363b7333a82b42edf5e2999c3e4f0766fd345e0ff336b64c59f0b2a47d5736938ed3467f6b334e42731

Download Submit
C:\Users\Infotmp.txt

Filesize
720B

MD5
bcf81309248075fbe92a5bfdf4d7fd06

SHA1
482d02b4f4b99300ed78ae46cfee6ca6b18a6976

SHA256
ebae15c0605043088f0f01ed3c5ad53c27813264d7119c2280c14e7453ed197a

SHA512
a5d52450ff40111622429d44b890b3941d6e9a4f3b79376733872de50598bc96a809d41eb1cc332e3045e597babc0b28ae0dc0b96f8b0ed0c3345505d8bab80a

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/4792-138-0x0000000002BA0000-0x0000000006BA0000-memory.dmp

Filesize
64.0MB

Download
memory/4792-137-0x0000000000300000-0x0000000000324000-memory.dmp

Filesize
144KB

Download
memory/4792-136-0x0000000000300000-0x0000000000324000-memory.dmp

Filesize
144KB

Download
memory/4792-144-0x0000000000300000-0x0000000000324000-memory.dmp

Filesize
144KB

Download
memory/5052-141-0x0000000075340000-0x0000000075364000-memory.dmp

Filesize
144KB

Download
memory/5052-143-0x0000000075340000-0x0000000075364000-memory.dmp

Filesize
144KB

Download
memory/5068-132-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/5068-145-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download

Analysis

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