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
1960	77582098.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"	77582098.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00140000000054ab-55.dat	upx
behavioral1/files/0x00140000000054ab-57.dat	upx
behavioral1/files/0x00090000000122e9-58.dat	upx
behavioral1/memory/1960-61-0x0000000000950000-0x0000000000989000-memory.dmp	upx
behavioral1/memory/1960-63-0x0000000075620000-0x0000000075680000-memory.dmp	upx
behavioral1/files/0x00080000000122ea-69.dat	upx
behavioral1/files/0x00080000000122ea-70.dat	upx
behavioral1/memory/2036-73-0x0000000074E80000-0x0000000074EB9000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
1960	77582098.exe
2036	Svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\367E04D4.tmp	77582098.exe
File opened for modification	C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll	77582098.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1960	77582098.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1788 wrote to memory of 1960	1788	c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb.exe	28
PID 1788 wrote to memory of 1960	1788	c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb.exe	28
PID 1788 wrote to memory of 1960	1788	c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb.exe	28
PID 1788 wrote to memory of 1960	1788	c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb.exe	28

C:\Users\Admin\AppData\Local\Temp\c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb.exe
"C:\Users\Admin\AppData\Local\Temp\c1981ac613ecc24c82e57a3f7e5b38876bb7ca58fbd722bda45b07ab0b6a1ccb.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1788
- C:\77582098.exe
  C:\77582098.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:1960

C:\Windows\SysWOW64\Svchost.exe
C:\Windows\SysWOW64\Svchost.exe -k netsvcs
1⤵
- Loads dropped DLL
PID:2036

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:\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
a81f622ed525330083ec51dec1536887

SHA1
025bbda044f2a14c5b5067ad712389679a47a875

SHA256
18d6be300056d7958aeddbb190c45770eab2bd4f931c9dc402da143615fa40ea

SHA512
af43e838b27b7c2244ec579b20c3a83c378aa60ca97bc578f73521ebe99fa65aadb611f705ef9d527ba4c0941c6939e1c7aeaf5ff272d921b9db95cfe21b2f68

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

Filesize
210KB

MD5
94e093112668837f74b208324fa2ac4f

SHA1
a32ef9576d574578335d939cfa14f3eeaa1109a8

SHA256
cd65d11401930f799e3121e29c03ec5190c11d4532ff8854495aca14223b4a09

SHA512
8f92599afde729c92db71d83d48e93fcf417af916217829354ce050ca2c8bfade97e42b0a15eaa3705168bdeb7bd9274f2617c0cd9369e51dd0291a11bf06b7d

Download Submit
\Windows\SysWOW64\367E04D4.tmp

Filesize
210KB

MD5
94e093112668837f74b208324fa2ac4f

SHA1
a32ef9576d574578335d939cfa14f3eeaa1109a8

SHA256
cd65d11401930f799e3121e29c03ec5190c11d4532ff8854495aca14223b4a09

SHA512
8f92599afde729c92db71d83d48e93fcf417af916217829354ce050ca2c8bfade97e42b0a15eaa3705168bdeb7bd9274f2617c0cd9369e51dd0291a11bf06b7d

Download Submit
\Windows\SysWOW64\FastUserSwitchingCompatibility.dll

Filesize
210KB

MD5
94e093112668837f74b208324fa2ac4f

SHA1
a32ef9576d574578335d939cfa14f3eeaa1109a8

SHA256
cd65d11401930f799e3121e29c03ec5190c11d4532ff8854495aca14223b4a09

SHA512
8f92599afde729c92db71d83d48e93fcf417af916217829354ce050ca2c8bfade97e42b0a15eaa3705168bdeb7bd9274f2617c0cd9369e51dd0291a11bf06b7d

Download Submit
memory/1788-59-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1788-67-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1788-60-0x0000000000160000-0x0000000000199000-memory.dmp

Filesize
228KB

Download
memory/1788-68-0x0000000000160000-0x0000000000199000-memory.dmp

Filesize
228KB

Download
memory/1960-64-0x0000000074C10000-0x0000000074C49000-memory.dmp

Filesize
228KB

Download
memory/1960-65-0x0000000001D90000-0x0000000005D90000-memory.dmp

Filesize
64.0MB

Download
memory/1960-66-0x0000000075620000-0x0000000075680000-memory.dmp

Filesize
384KB

Download
memory/1960-61-0x0000000000950000-0x0000000000989000-memory.dmp

Filesize
228KB

Download
memory/1960-63-0x0000000075620000-0x0000000075680000-memory.dmp

Filesize
384KB

Download
memory/1960-62-0x0000000001D90000-0x0000000005D90000-memory.dmp

Filesize
64.0MB

Download
memory/1960-74-0x0000000075620000-0x0000000075680000-memory.dmp

Filesize
384KB

Download
memory/1960-56-0x0000000076321000-0x0000000076323000-memory.dmp

Filesize
8KB

Download
memory/2036-73-0x0000000074E80000-0x0000000074EB9000-memory.dmp

Filesize
228KB

Download

Analysis

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