nymaim | eda99b91f8ed44267fe0a803090362ce54284c9ffdab19907c5f0260a3bf4537

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
27/09/2022, 15:26

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General

Target
file.exe
Size 415KB
Sample220927-st7c8sehbl
SHA256 eda99b91f8ed44267fe0a803090362ce54284c9ffdab19907c5f0260a3bf4537
MD5 e7c6cd643a1f792a68dc54cd5c96f2ee
SHA1 b086cb3f6bf5dbfcadd0fdebc3a2426c2cc0305c
SHA512 baf11a8d30ffdda31abafc351c494cfb1b5de285316c3401eafd1bb13075fa6240c10da6e8e022a86f6525e18e1b8218748daef57b135cac941e5dcf0f0a785b
SSDEEP 6144:H141ZJA+m1wXXIaYs9t1/wQ2OsPt5zref0x7VsU+kwnigabwVfs:H14NFmIYa11NyVtV4kwiB
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
1436	Cleaner.exe

Loads dropped DLL 1 IoCs

pid	Process
268	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
1816	1436	WerFault.exe	32

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1912	file.exe
1912	file.exe
1912	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1912	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1436	Cleaner.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1912 wrote to memory of 268	1912	file.exe	30
PID 1912 wrote to memory of 268	1912	file.exe	30
PID 1912 wrote to memory of 268	1912	file.exe	30
PID 1912 wrote to memory of 268	1912	file.exe	30
PID 268 wrote to memory of 1436	268	cmd.exe	32
PID 268 wrote to memory of 1436	268	cmd.exe	32
PID 268 wrote to memory of 1436	268	cmd.exe	32
PID 268 wrote to memory of 1436	268	cmd.exe	32
PID 1436 wrote to memory of 1816	1436	Cleaner.exe	34
PID 1436 wrote to memory of 1816	1436	Cleaner.exe	34
PID 1436 wrote to memory of 1816	1436	Cleaner.exe	34

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1912
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\HGognuVKlQJvcYb1B\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:268
- - C:\Users\Admin\AppData\Local\Temp\HGognuVKlQJvcYb1B\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\HGognuVKlQJvcYb1B\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1436
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1436 -s 1076
      4⤵
      Program crash
      PID:1816

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\HGognuVKlQJvcYb1B\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\HGognuVKlQJvcYb1B\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

Submit Download

Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\HGognuVKlQJvcYb1B\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\HGognuVKlQJvcYb1B\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/1436-66-0x000007FEFC1F1000-0x000007FEFC1F3000-memory.dmp

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memory/1436-65-0x0000000000C70000-0x0000000000DF2000-memory.dmp

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memory/1436-68-0x0000000000570000-0x00000000005B2000-memory.dmp

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memory/1912-59-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/1912-58-0x00000000005FE000-0x0000000000624000-memory.dmp

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memory/1912-55-0x00000000005FE000-0x0000000000624000-memory.dmp

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memory/1912-56-0x0000000000220000-0x000000000025F000-memory.dmp

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memory/1912-54-0x00000000763F1000-0x00000000763F3000-memory.dmp

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memory/1912-57-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/1912-70-0x0000000010000000-0x000000001001B000-memory.dmp

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