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 5 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral1/files/0x0007000000005c50-55.dat	aspack_v212_v242
behavioral1/files/0x0007000000005c50-59.dat	aspack_v212_v242
behavioral1/files/0x00090000000122dd-60.dat	aspack_v212_v242
behavioral1/files/0x00090000000122d6-66.dat	aspack_v212_v242
behavioral1/files/0x00090000000122d6-67.dat	aspack_v212_v242

Executes dropped EXE 1 IoCs

pid	Process
1940	4b167819.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"	4b167819.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0007000000005c50-55.dat	upx
behavioral1/memory/1940-57-0x00000000002A0000-0x00000000002C5000-memory.dmp	upx
behavioral1/memory/1940-58-0x00000000002A0000-0x00000000002C5000-memory.dmp	upx
behavioral1/files/0x0007000000005c50-59.dat	upx
behavioral1/files/0x00090000000122dd-60.dat	upx
behavioral1/memory/1940-63-0x00000000002A0000-0x00000000002C5000-memory.dmp	upx
behavioral1/files/0x00090000000122d6-66.dat	upx
behavioral1/files/0x00090000000122d6-67.dat	upx
behavioral1/memory/1960-69-0x0000000075550000-0x0000000075575000-memory.dmp	upx
behavioral1/memory/1960-70-0x0000000075550000-0x0000000075575000-memory.dmp	upx
behavioral1/memory/1960-72-0x0000000075550000-0x0000000075575000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
1940	4b167819.exe
1960	Svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\42A004A8.tmp	4b167819.exe
File opened for modification	C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll	4b167819.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1940	4b167819.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
900	d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
900	d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 900 wrote to memory of 1940	900	d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe	27
PID 900 wrote to memory of 1940	900	d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe	27
PID 900 wrote to memory of 1940	900	d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe	27
PID 900 wrote to memory of 1940	900	d1a0b545312e8cef38e89869c641edf2d7b6fa465ca27feedb29eb332b85db17.exe	27

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:900
- C:\4b167819.exe
  C:\4b167819.exe
  2⤵
  - Executes dropped EXE
  - Sets DLL path for service in the registry
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  PID:1940

C:\Windows\SysWOW64\Svchost.exe
C:\Windows\SysWOW64\Svchost.exe -k netsvcs
1⤵
- Loads dropped DLL
PID:1960

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:\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
5f1fc8f9b38db5fbe1734746826d20cb

SHA1
0af265485bd1fee5c3f2a4d58c572f00963231a2

SHA256
5120b740f126fa1dffa0fe01ee36bc5c1e40afd4b436ec84fc403835c92af72a

SHA512
e9e103d3e9099fd582fa36b6349fb0395b6d2e6317add047ba2b920c7b1497cec115fe0f4bfd67dcae523bc36f6b1cb8956387853469da9546d201418f484ac1

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

Filesize
84KB

MD5
32872c6531e576a67060607c2164d171

SHA1
c42662ef6fb61c556b63acae1e6979bd0e18970b

SHA256
bd7779ec20ac4e5b3321cd6ec9b0662d8dccfe9fb98046a7c3cbf2db314af813

SHA512
a23892645f554c2b748f4a415d915b77fe5308f8ad9e85962a808039c9ed5a6bbf4011af3080a1ee8a16625da07b0a74c4dc36e3fc493b0210bb665a1d597c16

Download Submit
\Windows\SysWOW64\42A004A8.tmp

Filesize
84KB

MD5
32872c6531e576a67060607c2164d171

SHA1
c42662ef6fb61c556b63acae1e6979bd0e18970b

SHA256
bd7779ec20ac4e5b3321cd6ec9b0662d8dccfe9fb98046a7c3cbf2db314af813

SHA512
a23892645f554c2b748f4a415d915b77fe5308f8ad9e85962a808039c9ed5a6bbf4011af3080a1ee8a16625da07b0a74c4dc36e3fc493b0210bb665a1d597c16

Download Submit
\Windows\SysWOW64\FastUserSwitchingCompatibility.dll

Filesize
84KB

MD5
32872c6531e576a67060607c2164d171

SHA1
c42662ef6fb61c556b63acae1e6979bd0e18970b

SHA256
bd7779ec20ac4e5b3321cd6ec9b0662d8dccfe9fb98046a7c3cbf2db314af813

SHA512
a23892645f554c2b748f4a415d915b77fe5308f8ad9e85962a808039c9ed5a6bbf4011af3080a1ee8a16625da07b0a74c4dc36e3fc493b0210bb665a1d597c16

Download Submit
memory/900-77-0x00000000002E0000-0x0000000000305000-memory.dmp

Filesize
148KB

Download
memory/900-76-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/900-61-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/900-62-0x00000000002E0000-0x0000000000305000-memory.dmp

Filesize
148KB

Download
memory/1940-64-0x0000000001E10000-0x0000000005E10000-memory.dmp

Filesize
64.0MB

Download
memory/1940-65-0x0000000075A40000-0x0000000075AA0000-memory.dmp

Filesize
384KB

Download
memory/1940-63-0x00000000002A0000-0x00000000002C5000-memory.dmp

Filesize
148KB

Download
memory/1940-58-0x00000000002A0000-0x00000000002C5000-memory.dmp

Filesize
148KB

Download
memory/1940-74-0x0000000075A40000-0x0000000075AA0000-memory.dmp

Filesize
384KB

Download
memory/1940-57-0x00000000002A0000-0x00000000002C5000-memory.dmp

Filesize
148KB

Download
memory/1940-56-0x0000000075C61000-0x0000000075C63000-memory.dmp

Filesize
8KB

Download
memory/1960-69-0x0000000075550000-0x0000000075575000-memory.dmp

Filesize
148KB

Download
memory/1960-70-0x0000000075550000-0x0000000075575000-memory.dmp

Filesize
148KB

Download
memory/1960-72-0x0000000075550000-0x0000000075575000-memory.dmp

Filesize
148KB

Download

Analysis

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