d23d19798b1868435fd6dfa7feda07637c844f4f4789b0ded9671c196cbfdd25

General

Target

d23d19798b1868435fd6dfa7feda07637c844f4f4789b0ded9671c196cbfdd25.exe
Size

176KB
MD5

6817c82b02ff1a2e19d80bcd0e3e927c
SHA1

07f4ac6b268ddd6972e95b18ed4a4fcccf17ae26
SHA256

d23d19798b1868435fd6dfa7feda07637c844f4f4789b0ded9671c196cbfdd25
SHA512

c6579e30e37472a400d727f88bdfd6867276ffbe89e08202235c45dd8741d19ba2ebd83b1cfebde74e68d990ff35312f1f5be638da9951cc0e4b599cc777b7f9
SSDEEP

3072:7xbUV/7421tvlPytmjw8YdNuuIN+ZL5mEvnESuifG+3vw+XOSYtVZoAN:8D4EtvlPytm05dPfnBuH+3o+9

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/0x0005000000022dc8-134.dat	aspack_v212_v242
behavioral2/files/0x0005000000022dc8-133.dat	aspack_v212_v242
behavioral2/files/0x0003000000022df7-141.dat	aspack_v212_v242
behavioral2/files/0x0003000000022df7-140.dat	aspack_v212_v242

Executes dropped EXE 1 IoCs

pid	Process
5040	762e2b52.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"	762e2b52.exe

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0005000000022dc8-134.dat	upx
behavioral2/files/0x0005000000022dc8-133.dat	upx
behavioral2/memory/5040-136-0x0000000000040000-0x0000000000066000-memory.dmp	upx
behavioral2/memory/5040-137-0x0000000000040000-0x0000000000066000-memory.dmp	upx
behavioral2/memory/5040-138-0x0000000000040000-0x0000000000066000-memory.dmp	upx
behavioral2/files/0x0003000000022df7-141.dat	upx
behavioral2/files/0x0003000000022df7-140.dat	upx
behavioral2/memory/4952-142-0x0000000074E00000-0x0000000074E26000-memory.dmp	upx
behavioral2/memory/4952-143-0x0000000074E00000-0x0000000074E26000-memory.dmp	upx
behavioral2/memory/4952-144-0x0000000074E00000-0x0000000074E26000-memory.dmp	upx
behavioral2/memory/5040-147-0x0000000000040000-0x0000000000066000-memory.dmp	upx
behavioral2/memory/4952-146-0x0000000074E00000-0x0000000074E26000-memory.dmp	upx

Loads dropped DLL 1 IoCs

pid	Process
4952	svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\41EF0C14.tmp	762e2b52.exe
File opened for modification	C:\Windows\SysWOW64\FastUserSwitchingCompatibility.dll	762e2b52.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5040	762e2b52.exe
5040	762e2b52.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3752	d23d19798b1868435fd6dfa7feda07637c844f4f4789b0ded9671c196cbfdd25.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3752 wrote to memory of 5040	3752	d23d19798b1868435fd6dfa7feda07637c844f4f4789b0ded9671c196cbfdd25.exe	83
PID 3752 wrote to memory of 5040	3752	d23d19798b1868435fd6dfa7feda07637c844f4f4789b0ded9671c196cbfdd25.exe	83
PID 3752 wrote to memory of 5040	3752	d23d19798b1868435fd6dfa7feda07637c844f4f4789b0ded9671c196cbfdd25.exe	83

C:\Users\Admin\AppData\Local\Temp\d23d19798b1868435fd6dfa7feda07637c844f4f4789b0ded9671c196cbfdd25.exe
"C:\Users\Admin\AppData\Local\Temp\d23d19798b1868435fd6dfa7feda07637c844f4f4789b0ded9671c196cbfdd25.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3752
- C:\762e2b52.exe
  C:\762e2b52.exe
  2⤵
  - Executes dropped EXE
  - Sets DLL path for service in the registry
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  PID:5040

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k netsvcs -s FastUserSwitchingCompatibility
1⤵
- Loads dropped DLL
PID:4952

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:\762e2b52.exe

Filesize
90KB

MD5
6b222c20acbdc5a0919ced7d62ae127e

SHA1
e5548137ef1150423b571fa0e7ceeb62c7190f56

SHA256
582dd6d194571b1399686acd934336238108d1e18e0756223d318d552539bf5a

SHA512
97cb5023f43c91ecc3577f270c54f486fb1246970f019a88eb7e2ee77d94b2e37a85a20b70989aca85ca7c18661346f5499e46d8a069f1ef2ad4b9d0233cb815

Download Submit
C:\762e2b52.exe

Filesize
90KB

MD5
6b222c20acbdc5a0919ced7d62ae127e

SHA1
e5548137ef1150423b571fa0e7ceeb62c7190f56

SHA256
582dd6d194571b1399686acd934336238108d1e18e0756223d318d552539bf5a

SHA512
97cb5023f43c91ecc3577f270c54f486fb1246970f019a88eb7e2ee77d94b2e37a85a20b70989aca85ca7c18661346f5499e46d8a069f1ef2ad4b9d0233cb815

Download Submit
C:\Users\Infotmp.txt

Filesize
720B

MD5
ce61bc60c94df10aa09593e2cb9ccd43

SHA1
ee957dc5df0dca836d2fd16283de707de03c8cdc

SHA256
455e02d7c49abce0b53bdbb013af6abcd4161ba8f86a57bafa8ddfbb8e28f7c3

SHA512
e9cb2e91632f463320bbafcf31dbedc7f9af5cd73a7c063379da9ab1bb4c310f33c5ef68d69a0939581097d8eb50070afb10a45f951ce42f2f7d01f7abada837

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

Filesize
90KB

MD5
d9c481df51944891331899940034a2fd

SHA1
1d86eeec53bc1a4a5e28b69e3faec885dd48fdfa

SHA256
e5d4623258e0c70c13ecc444f811c587e7b8191aaefef7773095d082be94737f

SHA512
3a3673a3e10d3c4aa74eb902ad3eebc9e20df739b6b5b3c58922e37271a5deff92f6a4c4c790e1e0ba2d3db3f2e920a3253fddf33250fede8aa46552ec3b427a

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

Filesize
90KB

MD5
d9c481df51944891331899940034a2fd

SHA1
1d86eeec53bc1a4a5e28b69e3faec885dd48fdfa

SHA256
e5d4623258e0c70c13ecc444f811c587e7b8191aaefef7773095d082be94737f

SHA512
3a3673a3e10d3c4aa74eb902ad3eebc9e20df739b6b5b3c58922e37271a5deff92f6a4c4c790e1e0ba2d3db3f2e920a3253fddf33250fede8aa46552ec3b427a

Download Submit
memory/3752-135-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/3752-148-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/4952-144-0x0000000074E00000-0x0000000074E26000-memory.dmp

Filesize
152KB

Download
memory/4952-142-0x0000000074E00000-0x0000000074E26000-memory.dmp

Filesize
152KB

Download
memory/4952-143-0x0000000074E00000-0x0000000074E26000-memory.dmp

Filesize
152KB

Download
memory/4952-146-0x0000000074E00000-0x0000000074E26000-memory.dmp

Filesize
152KB

Download
memory/5040-139-0x00000000022C0000-0x00000000062C0000-memory.dmp

Filesize
64.0MB

Download
memory/5040-138-0x0000000000040000-0x0000000000066000-memory.dmp

Filesize
152KB

Download
memory/5040-132-0x0000000000000000-mapping.dmp

Download
memory/5040-137-0x0000000000040000-0x0000000000066000-memory.dmp

Filesize
152KB

Download
memory/5040-147-0x0000000000040000-0x0000000000066000-memory.dmp

Filesize
152KB

Download
memory/5040-136-0x0000000000040000-0x0000000000066000-memory.dmp

Filesize
152KB

Download

Analysis

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