c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb

General

Target

c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb.exe
Size

288KB
MD5

a00b00897292a31af750ec0d7702a760
SHA1

895983c059fb503f6cbe52cda87ae6fe2f778665
SHA256

c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb
SHA512

910808b34854005806f80c274c08c483f8750efad6c5598d4f3f113a70df256e94fb720e08bd3b6df9165cddc1810778696b353e700a3fce98a765c01d73fda8
SSDEEP

3072:GqPL1/7w6ZAs+VBKiAmLy0wUNGbU7Y2xBRYEmq9TMLRuRSWjbdCz2hqG3Tp9TM9G:zQVjBeC9TMtuRRx0sL9TM9u

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4780	77582098.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\Irmon\Parameters\ServiceDll = "C:\\Windows\\system32\\Irmon.dll"	77582098.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\FastUserSwitchingCompatibility\Parameters\ServiceDll = "C:\\Windows\\system32\\FastUserSwitchingCompatibility.dll"	77582098.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Ias\Parameters\ServiceDll = "C:\\Windows\\system32\\Ias.dll"	77582098.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000a000000022df3-134.dat	upx
behavioral2/files/0x000a000000022df3-133.dat	upx
behavioral2/memory/4780-136-0x0000000000550000-0x0000000000589000-memory.dmp	upx
behavioral2/files/0x0008000000022e0e-139.dat	upx
behavioral2/files/0x0008000000022e0e-140.dat	upx
behavioral2/memory/1012-141-0x0000000074A60000-0x0000000074A99000-memory.dmp	upx
behavioral2/memory/4780-145-0x0000000000550000-0x0000000000589000-memory.dmp	upx
behavioral2/files/0x0006000000022e0f-143.dat	upx
behavioral2/memory/1012-144-0x0000000074A60000-0x0000000074A99000-memory.dmp	upx
behavioral2/files/0x0006000000022e0f-146.dat	upx
behavioral2/memory/3696-147-0x00000000749F0000-0x0000000074A29000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
1012	Svchost.exe
3696	Svchost.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\34D90998.tmp	77582098.exe
File opened for modification	C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll	77582098.exe
File opened for modification	C:\Windows\SysWOW64\Ias.dll	77582098.exe
File opened for modification	C:\Windows\SysWOW64\Irmon.dll	77582098.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4780	77582098.exe
4780	77582098.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1144 wrote to memory of 4780	1144	c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb.exe	81
PID 1144 wrote to memory of 4780	1144	c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb.exe	81
PID 1144 wrote to memory of 4780	1144	c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb.exe	81

C:\Users\Admin\AppData\Local\Temp\c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb.exe
"C:\Users\Admin\AppData\Local\Temp\c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1144
- C:\77582098.exe
  C:\77582098.exe
  2⤵
  - Executes dropped EXE
  - Sets DLL path for service in the registry
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  PID:4780

C:\Windows\SysWOW64\Svchost.exe
C:\Windows\SysWOW64\Svchost.exe -k netsvcs -s FastUserSwitchingCompatibility
1⤵
- Loads dropped DLL
PID:1012

C:\Windows\SysWOW64\Svchost.exe
C:\Windows\SysWOW64\Svchost.exe -k netsvcs -s Irmon
1⤵
- Loads dropped DLL
PID:3696

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:\77582098.exe

Filesize
210KB

MD5
2019b2838d672cebe97725033dc7398a

SHA1
6d4e99c06cf8ef1dfab95d62b6888216c16d721b

SHA256
12f076ea183dd8febd8d61cdca4ad77895aadf2c3a871e6dc67e2d70820f7ced

SHA512
10ed888f111f48a7951448960ed5aaf8e33add4e096b44e771e60daa0ff7453992d951fee923ef0560b9143dc2b6528ec9fe159913170e63e819a74babc9c918

Download Submit
C:\77582098.exe

Filesize
210KB

MD5
2019b2838d672cebe97725033dc7398a

SHA1
6d4e99c06cf8ef1dfab95d62b6888216c16d721b

SHA256
12f076ea183dd8febd8d61cdca4ad77895aadf2c3a871e6dc67e2d70820f7ced

SHA512
10ed888f111f48a7951448960ed5aaf8e33add4e096b44e771e60daa0ff7453992d951fee923ef0560b9143dc2b6528ec9fe159913170e63e819a74babc9c918

Download Submit
C:\Users\Infotmp.txt

Filesize
720B

MD5
01dabc7950e97f79da6838986fc8bb2c

SHA1
cac809d566b6b92e61a22e9875983961d1f55831

SHA256
ee481586dd0d75458091d47436b50cbdf0bcbd3573929b2a4205601c348de425

SHA512
b7c995b18ed5e2703c6bc492d6950a0bd2e9e440b900fbfea69df3c1089c3f1dff75cdc63dbef75be52348dcee218a14b950fe4f22bd8490593c5465c43b04de

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

Filesize
210KB

MD5
94e093112668837f74b208324fa2ac4f

SHA1
a32ef9576d574578335d939cfa14f3eeaa1109a8

SHA256
cd65d11401930f799e3121e29c03ec5190c11d4532ff8854495aca14223b4a09

SHA512
8f92599afde729c92db71d83d48e93fcf417af916217829354ce050ca2c8bfade97e42b0a15eaa3705168bdeb7bd9274f2617c0cd9369e51dd0291a11bf06b7d

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

Filesize
210KB

MD5
94e093112668837f74b208324fa2ac4f

SHA1
a32ef9576d574578335d939cfa14f3eeaa1109a8

SHA256
cd65d11401930f799e3121e29c03ec5190c11d4532ff8854495aca14223b4a09

SHA512
8f92599afde729c92db71d83d48e93fcf417af916217829354ce050ca2c8bfade97e42b0a15eaa3705168bdeb7bd9274f2617c0cd9369e51dd0291a11bf06b7d

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

Filesize
210KB

MD5
94e093112668837f74b208324fa2ac4f

SHA1
a32ef9576d574578335d939cfa14f3eeaa1109a8

SHA256
cd65d11401930f799e3121e29c03ec5190c11d4532ff8854495aca14223b4a09

SHA512
8f92599afde729c92db71d83d48e93fcf417af916217829354ce050ca2c8bfade97e42b0a15eaa3705168bdeb7bd9274f2617c0cd9369e51dd0291a11bf06b7d

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

Filesize
210KB

MD5
94e093112668837f74b208324fa2ac4f

SHA1
a32ef9576d574578335d939cfa14f3eeaa1109a8

SHA256
cd65d11401930f799e3121e29c03ec5190c11d4532ff8854495aca14223b4a09

SHA512
8f92599afde729c92db71d83d48e93fcf417af916217829354ce050ca2c8bfade97e42b0a15eaa3705168bdeb7bd9274f2617c0cd9369e51dd0291a11bf06b7d

Download Submit
memory/1012-144-0x0000000074A60000-0x0000000074A99000-memory.dmp

Filesize
228KB

Download
memory/1012-141-0x0000000074A60000-0x0000000074A99000-memory.dmp

Filesize
228KB

Download
memory/1144-135-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1144-148-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/3696-147-0x00000000749F0000-0x0000000074A29000-memory.dmp

Filesize
228KB

Download
memory/4780-138-0x0000000002280000-0x0000000006280000-memory.dmp

Filesize
64.0MB

Download
memory/4780-145-0x0000000000550000-0x0000000000589000-memory.dmp

Filesize
228KB

Download
memory/4780-137-0x0000000002280000-0x0000000006280000-memory.dmp

Filesize
64.0MB

Download
memory/4780-136-0x0000000000550000-0x0000000000589000-memory.dmp

Filesize
228KB

Download

Analysis

Sharing