a346595fe9232e039e99763b5fab73cb11383d9d8ec5cbafd861e84fb376e30d

Analysis

max time kernel
139s
max time network
147s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
24/11/2022, 11:37

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General

Target

AMR Player/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
1776	hrlE15.tmp
1900	caycwq.exe

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral13/files/0x00140000000054ab-56.dat	upx
behavioral13/files/0x00140000000054ab-57.dat	upx
behavioral13/files/0x00140000000054ab-59.dat	upx
behavioral13/files/0x00140000000054ab-60.dat	upx
behavioral13/memory/1776-61-0x0000000000400000-0x000000000041D000-memory.dmp	upx
behavioral13/files/0x0008000000015622-62.dat	upx
behavioral13/memory/1776-63-0x0000000000400000-0x000000000041D000-memory.dmp	upx
behavioral13/memory/1900-64-0x0000000000400000-0x000000000041D000-memory.dmp	upx
behavioral13/files/0x0008000000015622-65.dat	upx
behavioral13/memory/1900-68-0x0000000000400000-0x000000000041D000-memory.dmp	upx

Loads dropped DLL 3 IoCs

pid	Process
1676	rundll32.exe
1676	rundll32.exe
1900	caycwq.exe

Enumerates connected drives 3 TTPs 22 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\L:	caycwq.exe
File opened (read-only)	\??\S:	caycwq.exe
File opened (read-only)	\??\V:	caycwq.exe
File opened (read-only)	\??\X:	caycwq.exe
File opened (read-only)	\??\H:	caycwq.exe
File opened (read-only)	\??\K:	caycwq.exe
File opened (read-only)	\??\M:	caycwq.exe
File opened (read-only)	\??\N:	caycwq.exe
File opened (read-only)	\??\P:	caycwq.exe
File opened (read-only)	\??\Q:	caycwq.exe
File opened (read-only)	\??\U:	caycwq.exe
File opened (read-only)	\??\E:	caycwq.exe
File opened (read-only)	\??\J:	caycwq.exe
File opened (read-only)	\??\R:	caycwq.exe
File opened (read-only)	\??\T:	caycwq.exe
File opened (read-only)	\??\Y:	caycwq.exe
File opened (read-only)	\??\F:	caycwq.exe
File opened (read-only)	\??\G:	caycwq.exe
File opened (read-only)	\??\I:	caycwq.exe
File opened (read-only)	\??\O:	caycwq.exe
File opened (read-only)	\??\W:	caycwq.exe
File opened (read-only)	\??\Z:	caycwq.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\caycwq.exe	hrlE15.tmp
File opened for modification	C:\Windows\SysWOW64\caycwq.exe	hrlE15.tmp
File created	C:\Windows\SysWOW64\gei33.dll	caycwq.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1092 wrote to memory of 1676	1092	rundll32.exe	27
PID 1092 wrote to memory of 1676	1092	rundll32.exe	27
PID 1092 wrote to memory of 1676	1092	rundll32.exe	27
PID 1092 wrote to memory of 1676	1092	rundll32.exe	27
PID 1092 wrote to memory of 1676	1092	rundll32.exe	27
PID 1092 wrote to memory of 1676	1092	rundll32.exe	27
PID 1092 wrote to memory of 1676	1092	rundll32.exe	27
PID 1676 wrote to memory of 1776	1676	rundll32.exe	28
PID 1676 wrote to memory of 1776	1676	rundll32.exe	28
PID 1676 wrote to memory of 1776	1676	rundll32.exe	28
PID 1676 wrote to memory of 1776	1676	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\AMR Player\lpk.dll",#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe "C:\Users\Admin\AppData\Local\Temp\AMR Player\lpk.dll",#1
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1676
- - C:\Users\Admin\AppData\Local\Temp\hrlE15.tmp
    C:\Users\Admin\AppData\Local\Temp\hrlE15.tmp
    3⤵
    - Executes dropped EXE
    - Drops file in System32 directory
    PID:1776

C:\Windows\SysWOW64\caycwq.exe
C:\Windows\SysWOW64\caycwq.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Enumerates connected drives
- Drops file in System32 directory
PID:1900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\hrlE15.tmp

Filesize
33KB

MD5
1c5ff68d8d5bacf2524969da10883415

SHA1
3e3bd98a285bced519a81bd418a7a506e417c36e

SHA256
686ce3c2b25244c8877d0e8db076055632039a55bba236843a5ef18e187feb0b

SHA512
b10e5ae908f7e473f1314432227faa5e46615609384ebd4b82ccd3b1d5bc91d6e53662470a257e9f9c3c40983a081d609a7acae430edb0b6bfbe4fa30a89245f

Download Submit
C:\Users\Admin\AppData\Local\Temp\hrlE15.tmp

Filesize
33KB

MD5
1c5ff68d8d5bacf2524969da10883415

SHA1
3e3bd98a285bced519a81bd418a7a506e417c36e

SHA256
686ce3c2b25244c8877d0e8db076055632039a55bba236843a5ef18e187feb0b

SHA512
b10e5ae908f7e473f1314432227faa5e46615609384ebd4b82ccd3b1d5bc91d6e53662470a257e9f9c3c40983a081d609a7acae430edb0b6bfbe4fa30a89245f

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

Filesize
33KB

MD5
1c5ff68d8d5bacf2524969da10883415

SHA1
3e3bd98a285bced519a81bd418a7a506e417c36e

SHA256
686ce3c2b25244c8877d0e8db076055632039a55bba236843a5ef18e187feb0b

SHA512
b10e5ae908f7e473f1314432227faa5e46615609384ebd4b82ccd3b1d5bc91d6e53662470a257e9f9c3c40983a081d609a7acae430edb0b6bfbe4fa30a89245f

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

Filesize
33KB

MD5
1c5ff68d8d5bacf2524969da10883415

SHA1
3e3bd98a285bced519a81bd418a7a506e417c36e

SHA256
686ce3c2b25244c8877d0e8db076055632039a55bba236843a5ef18e187feb0b

SHA512
b10e5ae908f7e473f1314432227faa5e46615609384ebd4b82ccd3b1d5bc91d6e53662470a257e9f9c3c40983a081d609a7acae430edb0b6bfbe4fa30a89245f

Download Submit
\Users\Admin\AppData\Local\Temp\hrlE15.tmp

Filesize
33KB

MD5
1c5ff68d8d5bacf2524969da10883415

SHA1
3e3bd98a285bced519a81bd418a7a506e417c36e

SHA256
686ce3c2b25244c8877d0e8db076055632039a55bba236843a5ef18e187feb0b

SHA512
b10e5ae908f7e473f1314432227faa5e46615609384ebd4b82ccd3b1d5bc91d6e53662470a257e9f9c3c40983a081d609a7acae430edb0b6bfbe4fa30a89245f

Download Submit
\Users\Admin\AppData\Local\Temp\hrlE15.tmp

Filesize
33KB

MD5
1c5ff68d8d5bacf2524969da10883415

SHA1
3e3bd98a285bced519a81bd418a7a506e417c36e

SHA256
686ce3c2b25244c8877d0e8db076055632039a55bba236843a5ef18e187feb0b

SHA512
b10e5ae908f7e473f1314432227faa5e46615609384ebd4b82ccd3b1d5bc91d6e53662470a257e9f9c3c40983a081d609a7acae430edb0b6bfbe4fa30a89245f

Download Submit
\Windows\SysWOW64\gei33.dll

Filesize
46KB

MD5
77774d76e724ae9017bac8609947899c

SHA1
efd281c15cc901fee9c64f88fd0b74eb1fa82b57

SHA256
2017c37d13d1c5475cb1532f06a87ae60b1b5852a405a2b6c24d881efe7aba08

SHA512
68d88ff7c3e130f2ac25e73ba92398dd2b8a6dba26980395996ed6c8e7a4a404de30ce40f9819925afe55040c8f69e6461b7f8349d8de5f2ccdf19116407699f

Download Submit
memory/1676-55-0x0000000074C91000-0x0000000074C93000-memory.dmp

Filesize
8KB

Download
memory/1776-63-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/1776-61-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/1900-64-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/1900-68-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download