675388c0ab91525f2063721e5e9631479cba7df395d79765cb0aa2673049d12a

General

Target

675388c0ab91525f2063721e5e9631479cba7df395d79765cb0aa2673049d12a.exe
Size

160KB
MD5

a17bbeb0a64bc4b5e70ef42359b0bc01
SHA1

963174398b9787362c762b4ca5d5c6edefaba6b0
SHA256

675388c0ab91525f2063721e5e9631479cba7df395d79765cb0aa2673049d12a
SHA512

cd28977c7c9ef4776f654faf13573b8a0fe78b4f1a42e6f68919c31857462035dcad8a42f3027132f511c78f5c714dbd5c5dce3fc368db933eaa5fda804bb7c0
SSDEEP

3072:+qPL1/7w6ZAs+VBKhzdSH0RVNTUyV5EZUA9dHS2AVzH:LQVwR60RV2tZdSNVz

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/0x000a000000022df3-133.dat	aspack_v212_v242
behavioral2/files/0x000a000000022df3-134.dat	aspack_v212_v242
behavioral2/files/0x0006000000022e0e-139.dat	aspack_v212_v242
behavioral2/files/0x0006000000022e0e-140.dat	aspack_v212_v242

Executes dropped EXE 1 IoCs

pid	Process
4732	27773163.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"	27773163.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000a000000022df3-133.dat	upx
behavioral2/files/0x000a000000022df3-134.dat	upx
behavioral2/memory/4732-135-0x00000000009F0000-0x0000000000A14000-memory.dmp	upx
behavioral2/memory/4732-137-0x00000000009F0000-0x0000000000A14000-memory.dmp	upx
behavioral2/files/0x0006000000022e0e-139.dat	upx
behavioral2/files/0x0006000000022e0e-140.dat	upx
behavioral2/memory/5084-141-0x0000000074A70000-0x0000000074A94000-memory.dmp	upx
behavioral2/memory/5084-143-0x0000000074A70000-0x0000000074A94000-memory.dmp	upx

Loads dropped DLL 1 IoCs

pid	Process
5084	Svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\39FD0998.tmp	27773163.exe
File opened for modification	C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll	27773163.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4732	27773163.exe
4732	27773163.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 4732	5048	675388c0ab91525f2063721e5e9631479cba7df395d79765cb0aa2673049d12a.exe	81
PID 5048 wrote to memory of 4732	5048	675388c0ab91525f2063721e5e9631479cba7df395d79765cb0aa2673049d12a.exe	81
PID 5048 wrote to memory of 4732	5048	675388c0ab91525f2063721e5e9631479cba7df395d79765cb0aa2673049d12a.exe	81

C:\Users\Admin\AppData\Local\Temp\675388c0ab91525f2063721e5e9631479cba7df395d79765cb0aa2673049d12a.exe
"C:\Users\Admin\AppData\Local\Temp\675388c0ab91525f2063721e5e9631479cba7df395d79765cb0aa2673049d12a.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5048
- C:\27773163.exe
  C:\27773163.exe
  2⤵
  - Executes dropped EXE
  - Sets DLL path for service in the registry
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  PID:4732

C:\Windows\SysWOW64\Svchost.exe
C:\Windows\SysWOW64\Svchost.exe -k netsvcs -s FastUserSwitchingCompatibility
1⤵
- Loads dropped DLL
PID:5084

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:\27773163.exe

Filesize
79KB

MD5
9edd836f73a5aa1b844865a3b98814f9

SHA1
23ca95f159ddb968fb1c6f239f6d9fbcbc92efce

SHA256
18d783fecdedc087596077e9cbb242ead86266a44fa362f8712af71bb6a20388

SHA512
c2600d1cd2bb1c0f61fa1072694f6ccc0a8a182383911363b7333a82b42edf5e2999c3e4f0766fd345e0ff336b64c59f0b2a47d5736938ed3467f6b334e42731

Download Submit
C:\27773163.exe

Filesize
79KB

MD5
9edd836f73a5aa1b844865a3b98814f9

SHA1
23ca95f159ddb968fb1c6f239f6d9fbcbc92efce

SHA256
18d783fecdedc087596077e9cbb242ead86266a44fa362f8712af71bb6a20388

SHA512
c2600d1cd2bb1c0f61fa1072694f6ccc0a8a182383911363b7333a82b42edf5e2999c3e4f0766fd345e0ff336b64c59f0b2a47d5736938ed3467f6b334e42731

Download Submit
C:\Users\Infotmp.txt

Filesize
720B

MD5
95c332db14f41124921b1d5d090edaa9

SHA1
ee30ea8c9440bcf4f0a62600f368f11cdf6ee83b

SHA256
83e7e23f0462136b94aa099c6d4c84e3b366b8a60ed2598e476efe81c1bd7909

SHA512
72df1512135b26fd0e1512eade6b8d685e97b612c8e9e48cd5a1846ddd0cd837a6f9c695ab5dbf753709bc9abae2a56a5caca959d66f5b06420335a4fdce78fc

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/4732-138-0x0000000002CA0000-0x0000000006CA0000-memory.dmp

Filesize
64.0MB

Download
memory/4732-132-0x0000000000000000-mapping.dmp

Download
memory/4732-137-0x00000000009F0000-0x0000000000A14000-memory.dmp

Filesize
144KB

Download
memory/4732-135-0x00000000009F0000-0x0000000000A14000-memory.dmp

Filesize
144KB

Download
memory/5048-136-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/5048-144-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/5084-141-0x0000000074A70000-0x0000000074A94000-memory.dmp

Filesize
144KB

Download
memory/5084-143-0x0000000074A70000-0x0000000074A94000-memory.dmp

Filesize
144KB

Download

Analysis

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