e9577c84126c3a23859e9ef52f3b656e0a78c4b6c385b62e696642c7692c6cf2

Analysis

max time kernel
164s
max time network
183s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
27-11-2022 10:56

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General

Target

calc/calc/lpk.dll
Size

46KB
MD5

77774d76e724ae9017bac8609947899c
SHA1

efd281c15cc901fee9c64f88fd0b74eb1fa82b57
SHA256

2017c37d13d1c5475cb1532f06a87ae60b1b5852a405a2b6c24d881efe7aba08
SHA512

68d88ff7c3e130f2ac25e73ba92398dd2b8a6dba26980395996ed6c8e7a4a404de30ce40f9819925afe55040c8f69e6461b7f8349d8de5f2ccdf19116407699f
SSDEEP

768:IUWUAohfjiT5ediDgEYe5eWomHEo2fKEFCLxu5qr7Ho73UEWkGpIfxMC:10qfWT5MbEYme9aLMBCVuEXID3x+C

Score

8^/10

upx

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2292	hrl6254.tmp
1860	wokakm.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000700000002315f-135.dat	upx
behavioral2/files/0x000700000002315f-136.dat	upx
behavioral2/files/0x0006000000023164-137.dat	upx
behavioral2/files/0x0006000000023164-138.dat	upx
behavioral2/memory/2292-139-0x0000000000400000-0x000000000041D000-memory.dmp	upx
behavioral2/memory/1860-140-0x0000000000400000-0x000000000041D000-memory.dmp	upx
behavioral2/memory/2292-141-0x0000000000400000-0x000000000041D000-memory.dmp	upx
behavioral2/memory/1860-143-0x0000000000400000-0x000000000041D000-memory.dmp	upx

Loads dropped DLL 1 IoCs

pid	Process
1860	wokakm.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\gei33.dll	wokakm.exe
File created	C:\Windows\SysWOW64\wokakm.exe	hrl6254.tmp
File opened for modification	C:\Windows\SysWOW64\wokakm.exe	hrl6254.tmp

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4276 wrote to memory of 5024	4276	rundll32.exe	82
PID 4276 wrote to memory of 5024	4276	rundll32.exe	82
PID 4276 wrote to memory of 5024	4276	rundll32.exe	82
PID 5024 wrote to memory of 2292	5024	rundll32.exe	85
PID 5024 wrote to memory of 2292	5024	rundll32.exe	85
PID 5024 wrote to memory of 2292	5024	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\calc\calc\lpk.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4276
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\calc\calc\lpk.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5024
- - C:\Users\Admin\AppData\Local\Temp\hrl6254.tmp
    C:\Users\Admin\AppData\Local\Temp\hrl6254.tmp
    3⤵
    - Executes dropped EXE
    - Drops file in System32 directory
    PID:2292

C:\Windows\SysWOW64\wokakm.exe
C:\Windows\SysWOW64\wokakm.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
PID:1860

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\hrl6254.tmp

Filesize
33KB

MD5
1c5ff68d8d5bacf2524969da10883415

SHA1
3e3bd98a285bced519a81bd418a7a506e417c36e

SHA256
686ce3c2b25244c8877d0e8db076055632039a55bba236843a5ef18e187feb0b

SHA512
b10e5ae908f7e473f1314432227faa5e46615609384ebd4b82ccd3b1d5bc91d6e53662470a257e9f9c3c40983a081d609a7acae430edb0b6bfbe4fa30a89245f

Download Submit
C:\Users\Admin\AppData\Local\Temp\hrl6254.tmp

Filesize
33KB

MD5
1c5ff68d8d5bacf2524969da10883415

SHA1
3e3bd98a285bced519a81bd418a7a506e417c36e

SHA256
686ce3c2b25244c8877d0e8db076055632039a55bba236843a5ef18e187feb0b

SHA512
b10e5ae908f7e473f1314432227faa5e46615609384ebd4b82ccd3b1d5bc91d6e53662470a257e9f9c3c40983a081d609a7acae430edb0b6bfbe4fa30a89245f

Download Submit
C:\Windows\SysWOW64\gei33.dll

Filesize
46KB

MD5
77774d76e724ae9017bac8609947899c

SHA1
efd281c15cc901fee9c64f88fd0b74eb1fa82b57

SHA256
2017c37d13d1c5475cb1532f06a87ae60b1b5852a405a2b6c24d881efe7aba08

SHA512
68d88ff7c3e130f2ac25e73ba92398dd2b8a6dba26980395996ed6c8e7a4a404de30ce40f9819925afe55040c8f69e6461b7f8349d8de5f2ccdf19116407699f

Download Submit
C:\Windows\SysWOW64\wokakm.exe

Filesize
33KB

MD5
1c5ff68d8d5bacf2524969da10883415

SHA1
3e3bd98a285bced519a81bd418a7a506e417c36e

SHA256
686ce3c2b25244c8877d0e8db076055632039a55bba236843a5ef18e187feb0b

SHA512
b10e5ae908f7e473f1314432227faa5e46615609384ebd4b82ccd3b1d5bc91d6e53662470a257e9f9c3c40983a081d609a7acae430edb0b6bfbe4fa30a89245f

Download Submit
C:\Windows\SysWOW64\wokakm.exe

Filesize
33KB

MD5
1c5ff68d8d5bacf2524969da10883415

SHA1
3e3bd98a285bced519a81bd418a7a506e417c36e

SHA256
686ce3c2b25244c8877d0e8db076055632039a55bba236843a5ef18e187feb0b

SHA512
b10e5ae908f7e473f1314432227faa5e46615609384ebd4b82ccd3b1d5bc91d6e53662470a257e9f9c3c40983a081d609a7acae430edb0b6bfbe4fa30a89245f

Download Submit
memory/1860-140-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/1860-143-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/2292-139-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/2292-141-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download