nymaim | 911d9e4d866dd40977be27cf581a457662b752d2121af307e6fce83cabc6b6f1

Analysis

max time kernel
145s
max time network
149s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
27/09/2022, 11:12

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General

Target
file.exe
Size 406KB
Sample220927-nat7caeeaj
SHA256 911d9e4d866dd40977be27cf581a457662b752d2121af307e6fce83cabc6b6f1
MD5 dd7b89d15b85c9e180691169abb013c9
SHA1 abc22ddffbf788f4fd932af0af0c8a9d6967a007
SHA512 5c33add21f65d2ad3ebc984850d046a4dc286019a5faeae17ca6d51f4c0871330fc9b5660ed2dcde327c3d9d69daf6ac1e577526479c67f05c209d8a2a5b4f00
SSDEEP 6144:g+5ZnPNUIoK0o14q9DOezc6ncyuIsvlwN90FQnigabwVf:g+nPNUItAEc9IsdhFQi
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

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
944	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1160	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
776	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
676	944	WerFault.exe	30

Kills process with taskkill 1 IoCs

evasion

pid	Process
572	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1452	file.exe
1452	file.exe
1452	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	944	Cleaner.exe
Token: SeDebugPrivilege	572	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 776	1452	file.exe	28
PID 1452 wrote to memory of 776	1452	file.exe	28
PID 1452 wrote to memory of 776	1452	file.exe	28
PID 1452 wrote to memory of 776	1452	file.exe	28
PID 776 wrote to memory of 944	776	cmd.exe	30
PID 776 wrote to memory of 944	776	cmd.exe	30
PID 776 wrote to memory of 944	776	cmd.exe	30
PID 776 wrote to memory of 944	776	cmd.exe	30
PID 944 wrote to memory of 676	944	Cleaner.exe	32
PID 944 wrote to memory of 676	944	Cleaner.exe	32
PID 944 wrote to memory of 676	944	Cleaner.exe	32
PID 1452 wrote to memory of 1160	1452	file.exe	33
PID 1452 wrote to memory of 1160	1452	file.exe	33
PID 1452 wrote to memory of 1160	1452	file.exe	33
PID 1452 wrote to memory of 1160	1452	file.exe	33
PID 1160 wrote to memory of 572	1160	cmd.exe	35
PID 1160 wrote to memory of 572	1160	cmd.exe	35
PID 1160 wrote to memory of 572	1160	cmd.exe	35
PID 1160 wrote to memory of 572	1160	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:1452
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\BAyY30FUDY2nW17ch8M5jKbjP\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:776
- - C:\Users\Admin\AppData\Local\Temp\BAyY30FUDY2nW17ch8M5jKbjP\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\BAyY30FUDY2nW17ch8M5jKbjP\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:944
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 944 -s 1156
      4⤵
      Program crash
      PID:676
- 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:1160
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:572

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\BAyY30FUDY2nW17ch8M5jKbjP\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\BAyY30FUDY2nW17ch8M5jKbjP\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\BAyY30FUDY2nW17ch8M5jKbjP\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\BAyY30FUDY2nW17ch8M5jKbjP\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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memory/944-66-0x000007FEFBC61000-0x000007FEFBC63000-memory.dmp

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memory/944-68-0x000000001A6B0000-0x000000001A6F2000-memory.dmp

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memory/944-65-0x0000000001020000-0x00000000011A2000-memory.dmp

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memory/1452-63-0x00000000002AE000-0x00000000002D4000-memory.dmp

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memory/1452-56-0x0000000000470000-0x00000000004AF000-memory.dmp

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memory/1452-64-0x0000000000400000-0x000000000046A000-memory.dmp

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memory/1452-54-0x0000000075041000-0x0000000075043000-memory.dmp

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memory/1452-70-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1452-57-0x0000000000400000-0x000000000046A000-memory.dmp

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memory/1452-75-0x00000000002AE000-0x00000000002D4000-memory.dmp

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memory/1452-76-0x0000000000400000-0x000000000046A000-memory.dmp

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memory/1452-55-0x00000000002AE000-0x00000000002D4000-memory.dmp

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