d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17

General

Target

d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe
Size

176KB
MD5

a300bd3280be27d97dbe84965e573130
SHA1

5071489d1f9a96a97feae0bf2d94e08290f12d25
SHA256

d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17
SHA512

516c3c690252a1edb0457f47e04ce3b444b7a61039dc1038e32fe7d584b6a8946e19aebf346e70889d796c1b9e8a8840aeff980d1905bc96ce22b184453df0d2
SSDEEP

3072:nNf3wRqQxKvxnsRcaCynRUgh2MFi3pKZY51YtNJg/:NPeyxTUlhB0ZIY4PJg

Score

8^/10

aspackv2 persistence upx

Malware Config

Signatures

ASPack v2.12-2.42 6 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral2/files/0x0008000000022e14-133.dat	aspack_v212_v242
behavioral2/files/0x0008000000022e14-134.dat	aspack_v212_v242
behavioral2/files/0x000d000000022e10-140.dat	aspack_v212_v242
behavioral2/files/0x000d000000022e10-141.dat	aspack_v212_v242
behavioral2/files/0x0007000000022e1f-150.dat	aspack_v212_v242
behavioral2/files/0x0007000000022e1f-148.dat	aspack_v212_v242

Executes dropped EXE 1 IoCs

pid	Process
2740	4b167819.exe

Sets DLL path for service in the registry 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Ias\Parameters\ServiceDll = "C:\\Windows\\system32\\Ias.dll"	4b167819.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Irmon\Parameters\ServiceDll = "C:\\Windows\\system32\\Irmon.dll"	4b167819.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\FastUserSwitchingCompatibility\Parameters\ServiceDll = "C:\\Windows\\system32\\FastUserSwitchingCompatibility.dll"	4b167819.exe

UPX packed file 17 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0008000000022e14-133.dat	upx
behavioral2/files/0x0008000000022e14-134.dat	upx
behavioral2/memory/2740-136-0x0000000000680000-0x00000000006A5000-memory.dmp	upx
behavioral2/memory/2740-137-0x0000000000680000-0x00000000006A5000-memory.dmp	upx
behavioral2/memory/2740-138-0x0000000000680000-0x00000000006A5000-memory.dmp	upx
behavioral2/files/0x000d000000022e10-140.dat	upx
behavioral2/files/0x000d000000022e10-141.dat	upx
behavioral2/memory/4788-142-0x00000000752A0000-0x00000000752C5000-memory.dmp	upx
behavioral2/memory/4788-143-0x00000000752A0000-0x00000000752C5000-memory.dmp	upx
behavioral2/memory/4788-145-0x00000000752A0000-0x00000000752C5000-memory.dmp	upx
behavioral2/memory/2740-149-0x0000000000680000-0x00000000006A5000-memory.dmp	upx
behavioral2/memory/1724-151-0x00000000752A0000-0x00000000752C5000-memory.dmp	upx
behavioral2/memory/1724-152-0x00000000752A0000-0x00000000752C5000-memory.dmp	upx
behavioral2/files/0x0007000000022e1f-150.dat	upx
behavioral2/files/0x0007000000022e1f-148.dat	upx
behavioral2/memory/4788-147-0x00000000752A0000-0x00000000752C5000-memory.dmp	upx
behavioral2/memory/1724-153-0x00000000752A0000-0x00000000752C5000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
4788	Svchost.exe
1724	Svchost.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Irmon.dll	4b167819.exe
File opened for modification	C:\Windows\SysWOW64\14DA0A10.tmp	4b167819.exe
File opened for modification	C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll	4b167819.exe
File opened for modification	C:\Windows\SysWOW64\Ias.dll	4b167819.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2740	4b167819.exe
2740	4b167819.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2084	d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2084	d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2740	2084	d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe	81
PID 2084 wrote to memory of 2740	2084	d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe	81
PID 2084 wrote to memory of 2740	2084	d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe	81

C:\Users\Admin\AppData\Local\Temp\d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe
"C:\Users\Admin\AppData\Local\Temp\d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe"
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2084
- C:\4b167819.exe
  C:\4b167819.exe
  2⤵
  - Executes dropped EXE
  - Sets DLL path for service in the registry
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  PID:2740

C:\Windows\SysWOW64\Svchost.exe
C:\Windows\SysWOW64\Svchost.exe -k netsvcs -s FastUserSwitchingCompatibility
1⤵
- Loads dropped DLL
PID:4788

C:\Windows\SysWOW64\Svchost.exe
C:\Windows\SysWOW64\Svchost.exe -k netsvcs -s Irmon
1⤵
- Loads dropped DLL
PID:1724

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:\4b167819.exe

Filesize
84KB

MD5
4f64150027ef95e311ddedeb266edf47

SHA1
a386c4b2fe25edc78b5e12434b6205061b12ff4f

SHA256
fcab76c8513c63f5a8f158f3758e7abb91f2dff3436302ff77fed68b34444c70

SHA512
bbf81485f0098830d9b56c6e13174de3fe81d79f24f4d23db81d4032f14ca72de130e7257a003c0e34d95f34325903ff914e22eb144ac39d21aaadb3cebe2375

Download Submit
C:\4b167819.exe

Filesize
84KB

MD5
4f64150027ef95e311ddedeb266edf47

SHA1
a386c4b2fe25edc78b5e12434b6205061b12ff4f

SHA256
fcab76c8513c63f5a8f158f3758e7abb91f2dff3436302ff77fed68b34444c70

SHA512
bbf81485f0098830d9b56c6e13174de3fe81d79f24f4d23db81d4032f14ca72de130e7257a003c0e34d95f34325903ff914e22eb144ac39d21aaadb3cebe2375

Download Submit
C:\Users\Infotmp.txt

Filesize
720B

MD5
fb464ffd8619ebfc9d7cea8ffc2ac65d

SHA1
e8e49665c68e2c77d51d99bdb5c56060db72c628

SHA256
f581522cbb50383f914e4cd194ae639934667d66a035fa5c942a0f5e05d30f70

SHA512
37de177750a94c3b3ba7baff2dbc447703983b04f58287fb73c582cc0fb5a7fc756210cb80b44db40b4df969a3075351c869f4782f056864b883413b07f8ce92

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

Filesize
84KB

MD5
32872c6531e576a67060607c2164d171

SHA1
c42662ef6fb61c556b63acae1e6979bd0e18970b

SHA256
bd7779ec20ac4e5b3321cd6ec9b0662d8dccfe9fb98046a7c3cbf2db314af813

SHA512
a23892645f554c2b748f4a415d915b77fe5308f8ad9e85962a808039c9ed5a6bbf4011af3080a1ee8a16625da07b0a74c4dc36e3fc493b0210bb665a1d597c16

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

Filesize
84KB

MD5
32872c6531e576a67060607c2164d171

SHA1
c42662ef6fb61c556b63acae1e6979bd0e18970b

SHA256
bd7779ec20ac4e5b3321cd6ec9b0662d8dccfe9fb98046a7c3cbf2db314af813

SHA512
a23892645f554c2b748f4a415d915b77fe5308f8ad9e85962a808039c9ed5a6bbf4011af3080a1ee8a16625da07b0a74c4dc36e3fc493b0210bb665a1d597c16

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

Filesize
84KB

MD5
32872c6531e576a67060607c2164d171

SHA1
c42662ef6fb61c556b63acae1e6979bd0e18970b

SHA256
bd7779ec20ac4e5b3321cd6ec9b0662d8dccfe9fb98046a7c3cbf2db314af813

SHA512
a23892645f554c2b748f4a415d915b77fe5308f8ad9e85962a808039c9ed5a6bbf4011af3080a1ee8a16625da07b0a74c4dc36e3fc493b0210bb665a1d597c16

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

Filesize
84KB

MD5
32872c6531e576a67060607c2164d171

SHA1
c42662ef6fb61c556b63acae1e6979bd0e18970b

SHA256
bd7779ec20ac4e5b3321cd6ec9b0662d8dccfe9fb98046a7c3cbf2db314af813

SHA512
a23892645f554c2b748f4a415d915b77fe5308f8ad9e85962a808039c9ed5a6bbf4011af3080a1ee8a16625da07b0a74c4dc36e3fc493b0210bb665a1d597c16

Download Submit
memory/1724-153-0x00000000752A0000-0x00000000752C5000-memory.dmp

Filesize
148KB

Download
memory/1724-152-0x00000000752A0000-0x00000000752C5000-memory.dmp

Filesize
148KB

Download
memory/1724-151-0x00000000752A0000-0x00000000752C5000-memory.dmp

Filesize
148KB

Download
memory/2084-135-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2084-154-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2740-149-0x0000000000680000-0x00000000006A5000-memory.dmp

Filesize
148KB

Download
memory/2740-144-0x0000000002970000-0x0000000006970000-memory.dmp

Filesize
64.0MB

Download
memory/2740-132-0x0000000000000000-mapping.dmp

Download
memory/2740-139-0x0000000002970000-0x0000000006970000-memory.dmp

Filesize
64.0MB

Download
memory/2740-138-0x0000000000680000-0x00000000006A5000-memory.dmp

Filesize
148KB

Download
memory/2740-137-0x0000000000680000-0x00000000006A5000-memory.dmp

Filesize
148KB

Download
memory/2740-136-0x0000000000680000-0x00000000006A5000-memory.dmp

Filesize
148KB

Download
memory/4788-145-0x00000000752A0000-0x00000000752C5000-memory.dmp

Filesize
148KB

Download
memory/4788-143-0x00000000752A0000-0x00000000752C5000-memory.dmp

Filesize
148KB

Download
memory/4788-142-0x00000000752A0000-0x00000000752C5000-memory.dmp

Filesize
148KB

Download
memory/4788-147-0x00000000752A0000-0x00000000752C5000-memory.dmp

Filesize
148KB

Download

Analysis

Sharing