nefilim | 3730e9cba4a93bc985ef7cd2368ccbf5eccd4724f514b38b20e320e5553dd08d

Analysis

max time kernel
1216s
max time network
1217s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
16-07-2024 08:54

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General

Target

2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe
Size

70KB
MD5

193e702195e8ed5c50cc482569559462
SHA1

47a5307b78fa2c60c20ce63c553aef4a6d5a3e1c
SHA256

2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e
SHA512

d5ae5a8bccfc08bc07834caaebaed7a6cde1911170eb8de99322bf15be3ad111b5042d6401dcb06e64a6a429eee19d964878089af205474b377b77627bb63a35
SSDEEP

768:lXStkFWTBhyugDC60CPJkEBx9w7mSDh3vkkjvshT3ED18nv04ZPqpb348Uq1krHO:liMWV3gDCk6EBwT/kJbvkbuq1krj0z

Score

10^/10

nefilim ransomware

Malware Config

Signatures

Nefilim
Ransomware first seen in early 2020 which shares code with the Nemty family. Rewritten in Golang in July 2020.
ransomware nefilim
Renames multiple (183) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Deletes itself 1 IoCs

Processes:

cmd.exe

pid	Process
2876	cmd.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

Processes:

timeout.exe

pid	Process
2724	timeout.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

AUDIODG.EXE

description	pid	Process
Token: 33	2968	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	2968	AUDIODG.EXE
Token: 33	2968	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	2968	AUDIODG.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

NOTEPAD.EXE

pid	Process
2380	NOTEPAD.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.execmd.exe

description	pid	Process	procid_target
PID 2524 wrote to memory of 2876	2524	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe	30
PID 2524 wrote to memory of 2876	2524	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe	30
PID 2524 wrote to memory of 2876	2524	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe	30
PID 2524 wrote to memory of 2876	2524	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe	30
PID 2876 wrote to memory of 2724	2876	cmd.exe	32
PID 2876 wrote to memory of 2724	2876	cmd.exe	32
PID 2876 wrote to memory of 2724	2876	cmd.exe	32
PID 2876 wrote to memory of 2724	2876	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe
"C:\Users\Admin\AppData\Local\Temp\2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2524
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 3 /nobreak && del "C:\Users\Admin\AppData\Local\Temp\2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe" /s /f /q
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2876
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 3 /nobreak
    3⤵
    - Delays execution with timeout.exe
    PID:2724

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:2848

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x560
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2968

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\NEFILIM-DECRYPT.txt
1⤵
- Suspicious use of FindShellTrayWindow
PID:2380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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:\NEFILIM-DECRYPT.txt

Filesize
846B

MD5
8e086743a1e0b99f0412429a3308d3bd

SHA1
f9b90350ff14d92de2039b4f25b8fcc683f6a497

SHA256
22fd17fe975e70e846054fd2f04df0ff16f2dd0d137f4bf715757d7725888802

SHA512
e6f37c64d9825b250979e9d1c89a2e71caeb4a34ff4ea9226a28f03aae4243277eaf54bb19bf475e8de56edff1553e158762252ad567a02889d0707b67e1237d

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