nymaim | 98b43c36052580aff0d7bacae12ca45b01d5cf101629706120e86c9ef393c393

General

Target

file.exe
Size

216KB
MD5

2b5cab78ddef9a073f3e67d6c232a3c0
SHA1

05c883937fb2d3f590290c19e67650d7eb8f2fe9
SHA256

98b43c36052580aff0d7bacae12ca45b01d5cf101629706120e86c9ef393c393
SHA512

7ed1762f4dbf74a20f8a7fb68026da78297137ea4104f7998490d712b8ac15e8015a985faf7f64b50ca4d3ea6162496a7338268c23551b6fdd9b11c9a91141be
SSDEEP

3072:xOQCTI5akzl06dzMUjC42+XVhl6iZb8CtyF45Pub5X+k39ZJhWJxQHmSJYoMkc78:xM8tdqi4tCtXAXh9MQHBPcp

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

C2

208.67.104.97

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1168	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1188	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1808	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2036	1168	WerFault.exe	30

Kills process with taskkill 1 IoCs

evasion

pid	Process
548	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1928	file.exe
1928	file.exe
1928	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1168	Cleaner.exe
Token: SeDebugPrivilege	548	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1928 wrote to memory of 1808	1928	file.exe	28
PID 1928 wrote to memory of 1808	1928	file.exe	28
PID 1928 wrote to memory of 1808	1928	file.exe	28
PID 1928 wrote to memory of 1808	1928	file.exe	28
PID 1808 wrote to memory of 1168	1808	cmd.exe	30
PID 1808 wrote to memory of 1168	1808	cmd.exe	30
PID 1808 wrote to memory of 1168	1808	cmd.exe	30
PID 1808 wrote to memory of 1168	1808	cmd.exe	30
PID 1168 wrote to memory of 2036	1168	Cleaner.exe	32
PID 1168 wrote to memory of 2036	1168	Cleaner.exe	32
PID 1168 wrote to memory of 2036	1168	Cleaner.exe	32
PID 1928 wrote to memory of 1188	1928	file.exe	33
PID 1928 wrote to memory of 1188	1928	file.exe	33
PID 1928 wrote to memory of 1188	1928	file.exe	33
PID 1928 wrote to memory of 1188	1928	file.exe	33
PID 1188 wrote to memory of 548	1188	cmd.exe	35
PID 1188 wrote to memory of 548	1188	cmd.exe	35
PID 1188 wrote to memory of 548	1188	cmd.exe	35
PID 1188 wrote to memory of 548	1188	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1928
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\SIdCE9ZxakLQmTUHIUxUGKSUMAVJu\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1808
- - C:\Users\Admin\AppData\Local\Temp\SIdCE9ZxakLQmTUHIUxUGKSUMAVJu\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\SIdCE9ZxakLQmTUHIUxUGKSUMAVJu\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1168
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1168 -s 1160
      4⤵
      Program crash
      PID:2036
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1188
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:548

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

1

T1102

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\SIdCE9ZxakLQmTUHIUxUGKSUMAVJu\Bunifu_UI_v1.5.3.dll

Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\SIdCE9ZxakLQmTUHIUxUGKSUMAVJu\Cleaner.exe

Filesize
4.2MB

MD5
e89589df13ac2783f322449f63547468

SHA1
bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6

SHA256
663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f

SHA512
9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6

Download Submit
C:\Users\Admin\AppData\Local\Temp\SIdCE9ZxakLQmTUHIUxUGKSUMAVJu\Cleaner.exe

Filesize
4.2MB

MD5
e89589df13ac2783f322449f63547468

SHA1
bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6

SHA256
663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f

SHA512
9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6

Download Submit
\Users\Admin\AppData\Local\Temp\SIdCE9ZxakLQmTUHIUxUGKSUMAVJu\Cleaner.exe

Filesize
4.2MB

MD5
e89589df13ac2783f322449f63547468

SHA1
bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6

SHA256
663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f

SHA512
9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6

Download Submit
memory/1168-66-0x000007FEFC161000-0x000007FEFC163000-memory.dmp

Filesize
8KB

Download
memory/1168-68-0x00000000005E0000-0x0000000000622000-memory.dmp

Filesize
264KB

Download
memory/1168-63-0x0000000000230000-0x00000000003B2000-memory.dmp

Filesize
1.5MB

Download
memory/1928-64-0x000000000073B000-0x0000000000762000-memory.dmp

Filesize
156KB

Download
memory/1928-65-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1928-54-0x00000000762B1000-0x00000000762B3000-memory.dmp

Filesize
8KB

Download
memory/1928-57-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1928-70-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1928-56-0x0000000000230000-0x000000000026F000-memory.dmp

Filesize
252KB

Download
memory/1928-75-0x000000000073B000-0x0000000000762000-memory.dmp

Filesize
156KB

Download
memory/1928-76-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1928-55-0x000000000073B000-0x0000000000762000-memory.dmp

Filesize
156KB

Download

Analysis

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