38aafc5967a4908a1761bd282299f65792869bd2cdd0ae403c505de137178408

General

Target

38aafc5967a4908a1761bd282299f65792869bd2cdd0ae403c505de137178408.exe
Size

160KB
MD5

a31043b8a7037f53bb8d1f7f9d3f46f0
SHA1

4c230ea5cbe01edfa70fb729ecf59c0c47c80ef3
SHA256

38aafc5967a4908a1761bd282299f65792869bd2cdd0ae403c505de137178408
SHA512

76574846621f3144f6a90855aebacf74a7060238d6d10fab18036981d6622ba5c7572c977ecfe3c91c71262c71fce74b6d90f54f6ed158bb0a7abab568d79bb6
SSDEEP

3072:eqPL1/7w6ZAs+VBKRL7TURxZPQeQ6DHtsamoBz:rQVuTOZPQRIHrmoB

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/0x0007000000022e3d-134.dat	aspack_v212_v242
behavioral2/files/0x0007000000022e3d-135.dat	aspack_v212_v242
behavioral2/files/0x0006000000022e44-141.dat	aspack_v212_v242
behavioral2/files/0x0006000000022e44-140.dat	aspack_v212_v242

Executes dropped EXE 1 IoCs

pid	Process
4144	31910a54.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"	31910a54.exe

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0007000000022e3d-134.dat	upx
behavioral2/files/0x0007000000022e3d-135.dat	upx
behavioral2/memory/4144-137-0x0000000000F20000-0x0000000000F44000-memory.dmp	upx
behavioral2/memory/4144-136-0x0000000000F20000-0x0000000000F44000-memory.dmp	upx
behavioral2/memory/4144-138-0x0000000000F20000-0x0000000000F44000-memory.dmp	upx
behavioral2/files/0x0006000000022e44-141.dat	upx
behavioral2/memory/1844-145-0x00000000750C0000-0x00000000750E4000-memory.dmp	upx
behavioral2/memory/1844-143-0x00000000750C0000-0x00000000750E4000-memory.dmp	upx
behavioral2/memory/1844-142-0x00000000750C0000-0x00000000750E4000-memory.dmp	upx
behavioral2/files/0x0006000000022e44-140.dat	upx

Loads dropped DLL 1 IoCs

pid	Process
1844	Svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\48B6089C.tmp	31910a54.exe
File opened for modification	C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll	31910a54.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4144	31910a54.exe
4144	31910a54.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4112 wrote to memory of 4144	4112	38aafc5967a4908a1761bd282299f65792869bd2cdd0ae403c505de137178408.exe	78
PID 4112 wrote to memory of 4144	4112	38aafc5967a4908a1761bd282299f65792869bd2cdd0ae403c505de137178408.exe	78
PID 4112 wrote to memory of 4144	4112	38aafc5967a4908a1761bd282299f65792869bd2cdd0ae403c505de137178408.exe	78

C:\Users\Admin\AppData\Local\Temp\38aafc5967a4908a1761bd282299f65792869bd2cdd0ae403c505de137178408.exe
"C:\Users\Admin\AppData\Local\Temp\38aafc5967a4908a1761bd282299f65792869bd2cdd0ae403c505de137178408.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4112
- C:\31910a54.exe
  C:\31910a54.exe
  2⤵
  - Executes dropped EXE
  - Sets DLL path for service in the registry
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  PID:4144

C:\Windows\SysWOW64\Svchost.exe
C:\Windows\SysWOW64\Svchost.exe -k netsvcs -s FastUserSwitchingCompatibility
1⤵
- Loads dropped DLL
PID:1844

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:\31910a54.exe

Filesize
81KB

MD5
9df97113d4fb0462ca99208668d6102a

SHA1
2b769b8615735bea0592c73b16ebab7baeedca98

SHA256
9b0fa329aa52f505162bcaeb1bb3ca4ecb1543ec4a9640d7fe8f9fab7668d974

SHA512
c2b9b619f608ec561a81fc5532a47d876f3a4b092babe8d2524c7055ba922f3d85ca9932698b692850d767884e0cdebce39838b5fea9cb6177645c5bb6867a6a

Download Submit
C:\31910a54.exe

Filesize
81KB

MD5
9df97113d4fb0462ca99208668d6102a

SHA1
2b769b8615735bea0592c73b16ebab7baeedca98

SHA256
9b0fa329aa52f505162bcaeb1bb3ca4ecb1543ec4a9640d7fe8f9fab7668d974

SHA512
c2b9b619f608ec561a81fc5532a47d876f3a4b092babe8d2524c7055ba922f3d85ca9932698b692850d767884e0cdebce39838b5fea9cb6177645c5bb6867a6a

Download Submit
C:\Users\Infotmp.txt

Filesize
720B

MD5
11cb62e5c7ea78ee4fd1ed660614c3a3

SHA1
837b7a2b4e5d0edf3daa051e4522ddfc2add34f0

SHA256
48fe17fd03cd34dac9747c6893b448f793e02438ed260b0c9b6f196fc595b2e3

SHA512
b9cd746c526f553109517953e94da32118a51f1c6b96bc7947ad8e157e8c611e5212bfb08f6569fd54dfbe10c2eb0bb99d2036e906671b0f6df4dc363e4d3ca4

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

Filesize
81KB

MD5
85b9df4b276647aa1170e21b5ce580a5

SHA1
081d4d7f83660724cbe256401870d7a2310bda12

SHA256
3b282419c0747296c11ea4ba8b92b775378fdb553e60900b61c8902864e7efeb

SHA512
ab0d70323bc470f2620659fa9a790ff1bc21cbbca6a642880414bea303c53feaee8743526005d43ce136ce7812c4cd1f26a843bd9be822341f98d39dc37b20f5

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

Filesize
81KB

MD5
85b9df4b276647aa1170e21b5ce580a5

SHA1
081d4d7f83660724cbe256401870d7a2310bda12

SHA256
3b282419c0747296c11ea4ba8b92b775378fdb553e60900b61c8902864e7efeb

SHA512
ab0d70323bc470f2620659fa9a790ff1bc21cbbca6a642880414bea303c53feaee8743526005d43ce136ce7812c4cd1f26a843bd9be822341f98d39dc37b20f5

Download Submit
memory/1844-142-0x00000000750C0000-0x00000000750E4000-memory.dmp

Filesize
144KB

Download
memory/1844-143-0x00000000750C0000-0x00000000750E4000-memory.dmp

Filesize
144KB

Download
memory/1844-145-0x00000000750C0000-0x00000000750E4000-memory.dmp

Filesize
144KB

Download
memory/4112-146-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/4112-132-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/4144-139-0x0000000002C60000-0x0000000006C60000-memory.dmp

Filesize
64.0MB

Download
memory/4144-138-0x0000000000F20000-0x0000000000F44000-memory.dmp

Filesize
144KB

Download
memory/4144-136-0x0000000000F20000-0x0000000000F44000-memory.dmp

Filesize
144KB

Download
memory/4144-137-0x0000000000F20000-0x0000000000F44000-memory.dmp

Filesize
144KB

Download

Analysis

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