b859ad0a833644fee03759a9a86a6d0df812c6e4a17a280f08f62218e8bbc36e

Analysis

max time kernel
130s
max time network
145s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
19/10/2022, 21:52

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General

Target

b859ad0a833644fee03759a9a86a6d0df812c6e4a17a280f08f62218e8bbc36e.dll
Size

150KB
MD5

91f654683aa8aacc13cd63599be17780
SHA1

1126991ec4e48d80262cd5d0a4fac949bb4660cc
SHA256

b859ad0a833644fee03759a9a86a6d0df812c6e4a17a280f08f62218e8bbc36e
SHA512

7f539f1fc97ecf333d479871da65753ffc801fe071672e7e03f1e157fd77668346e8d34e1dff087d7b0dea1ace5a036ca7ceb4f6cbff5d5a44e8dc4191422108
SSDEEP

3072:IV/12LgfyFZxok9ZoZ9eDECvVmb6Nq7q:IV/12LgqFZxok9ZoZBYq

Score

8^/10

upx

Malware Config

Signatures

Blocklisted process makes network request 4 IoCs

flow	pid	Process
1	2036	rundll32.exe
2	2036	rundll32.exe
6	2036	rundll32.exe
7	2036	rundll32.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/848-56-0x000000000B000000-0x000000000B031000-memory.dmp	upx
behavioral1/memory/848-59-0x000000000B000000-0x000000000B031000-memory.dmp	upx
behavioral1/memory/2036-67-0x000000000B000000-0x000000000B031000-memory.dmp	upx
behavioral1/memory/848-68-0x000000000B000000-0x000000000B031000-memory.dmp	upx
behavioral1/memory/2036-69-0x000000000B000000-0x000000000B031000-memory.dmp	upx

Loads dropped DLL 1 IoCs

pid	Process
2036	rundll32.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\PROGRA~3\xrfx04rf.cpp	rundll32.exe
File created	C:\PROGRA~3\fr40xfrx.fee	rundll32.exe
File opened for modification	C:\PROGRA~3\fr40xfrx.fee	rundll32.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1264 wrote to memory of 848	1264	rundll32.exe	27
PID 1264 wrote to memory of 848	1264	rundll32.exe	27
PID 1264 wrote to memory of 848	1264	rundll32.exe	27
PID 1264 wrote to memory of 848	1264	rundll32.exe	27
PID 1264 wrote to memory of 848	1264	rundll32.exe	27
PID 1264 wrote to memory of 848	1264	rundll32.exe	27
PID 1264 wrote to memory of 848	1264	rundll32.exe	27
PID 848 wrote to memory of 2036	848	rundll32.exe	28
PID 848 wrote to memory of 2036	848	rundll32.exe	28
PID 848 wrote to memory of 2036	848	rundll32.exe	28
PID 848 wrote to memory of 2036	848	rundll32.exe	28
PID 848 wrote to memory of 2036	848	rundll32.exe	28
PID 848 wrote to memory of 2036	848	rundll32.exe	28
PID 848 wrote to memory of 2036	848	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b859ad0a833644fee03759a9a86a6d0df812c6e4a17a280f08f62218e8bbc36e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1264
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b859ad0a833644fee03759a9a86a6d0df812c6e4a17a280f08f62218e8bbc36e.dll,#1
  2⤵
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:848
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\system32\rundll32.exe C:\PROGRA~3\xrfx04rf.cpp,XXS1
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    - Drops file in Program Files directory
    PID:2036

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\PROGRA~3\xrfx04rf.cpp

Filesize
150KB

MD5
91f654683aa8aacc13cd63599be17780

SHA1
1126991ec4e48d80262cd5d0a4fac949bb4660cc

SHA256
b859ad0a833644fee03759a9a86a6d0df812c6e4a17a280f08f62218e8bbc36e

SHA512
7f539f1fc97ecf333d479871da65753ffc801fe071672e7e03f1e157fd77668346e8d34e1dff087d7b0dea1ace5a036ca7ceb4f6cbff5d5a44e8dc4191422108

Download Submit
\PROGRA~3\xrfx04rf.cpp

Filesize
150KB

MD5
91f654683aa8aacc13cd63599be17780

SHA1
1126991ec4e48d80262cd5d0a4fac949bb4660cc

SHA256
b859ad0a833644fee03759a9a86a6d0df812c6e4a17a280f08f62218e8bbc36e

SHA512
7f539f1fc97ecf333d479871da65753ffc801fe071672e7e03f1e157fd77668346e8d34e1dff087d7b0dea1ace5a036ca7ceb4f6cbff5d5a44e8dc4191422108

Download Submit
memory/848-55-0x0000000075601000-0x0000000075603000-memory.dmp

Filesize
8KB

Download
memory/848-56-0x000000000B000000-0x000000000B031000-memory.dmp

Filesize
196KB

Download
memory/848-59-0x000000000B000000-0x000000000B031000-memory.dmp

Filesize
196KB

Download
memory/848-68-0x000000000B000000-0x000000000B031000-memory.dmp

Filesize
196KB

Download
memory/2036-67-0x000000000B000000-0x000000000B031000-memory.dmp

Filesize
196KB

Download
memory/2036-69-0x000000000B000000-0x000000000B031000-memory.dmp

Filesize
196KB

Download