nymaim | d3ba77deb12b2efd2fdc93eb6dd789727f49f4a3fac3cbb74d22fa1142413de2

Analysis

max time kernel
116s
max time network
118s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
26/09/2022, 17:13

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General

Target
file.exe
Size 216KB
Sample220926-vreljsbdf2
SHA256 d3ba77deb12b2efd2fdc93eb6dd789727f49f4a3fac3cbb74d22fa1142413de2
MD5 28662d90901f77ef1f7563d06527dc37
SHA1 117347353515109e8dbe5e5cba0ffa46868be388
SHA512 fdea9b2f95f5b727f4b5f56e8680955b07335a4ddff0937221f2626c7540594896fd0022325769c7dae5f0b181af07b63bed52fb5c09cc26d478efed404b8adc
SSDEEP 3072:yH7OKAxTc5iirR3rsjIy5hwldTDooUjX/uxYYGhGhJNSVhtGNhc9Zht+5B:IFFAcybwlJUoUjX/UIhk+ht6c9Zh
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
1688	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
852	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1580	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
1928	1688	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
1000	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
456	file.exe
456	file.exe
456	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1688	Cleaner.exe
Token: SeDebugPrivilege	1000	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 456 wrote to memory of 1580	456	file.exe	30
PID 456 wrote to memory of 1580	456	file.exe	30
PID 456 wrote to memory of 1580	456	file.exe	30
PID 456 wrote to memory of 1580	456	file.exe	30
PID 1580 wrote to memory of 1688	1580	cmd.exe	32
PID 1580 wrote to memory of 1688	1580	cmd.exe	32
PID 1580 wrote to memory of 1688	1580	cmd.exe	32
PID 1580 wrote to memory of 1688	1580	cmd.exe	32
PID 1688 wrote to memory of 1928	1688	Cleaner.exe	34
PID 1688 wrote to memory of 1928	1688	Cleaner.exe	34
PID 1688 wrote to memory of 1928	1688	Cleaner.exe	34
PID 456 wrote to memory of 852	456	file.exe	35
PID 456 wrote to memory of 852	456	file.exe	35
PID 456 wrote to memory of 852	456	file.exe	35
PID 456 wrote to memory of 852	456	file.exe	35
PID 852 wrote to memory of 1000	852	cmd.exe	37
PID 852 wrote to memory of 1000	852	cmd.exe	37
PID 852 wrote to memory of 1000	852	cmd.exe	37
PID 852 wrote to memory of 1000	852	cmd.exe	37

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:456
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\x6hXBknGupSifoi6XVftzKC6x1aA\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1580
- - C:\Users\Admin\AppData\Local\Temp\x6hXBknGupSifoi6XVftzKC6x1aA\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\x6hXBknGupSifoi6XVftzKC6x1aA\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1688
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1688 -s 1152
      4⤵
      Program crash
      PID:1928
- 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:852
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1000

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\x6hXBknGupSifoi6XVftzKC6x1aA\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\x6hXBknGupSifoi6XVftzKC6x1aA\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\x6hXBknGupSifoi6XVftzKC6x1aA\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\x6hXBknGupSifoi6XVftzKC6x1aA\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/456-76-0x0000000000230000-0x0000000000330000-memory.dmp

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memory/456-58-0x0000000000400000-0x0000000000593000-memory.dmp

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memory/456-57-0x00000000003A0000-0x00000000003DF000-memory.dmp

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memory/456-77-0x0000000000400000-0x0000000000593000-memory.dmp

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memory/456-55-0x0000000074F01000-0x0000000074F03000-memory.dmp

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memory/456-56-0x0000000000230000-0x0000000000330000-memory.dmp

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memory/456-71-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/456-68-0x0000000000230000-0x0000000000330000-memory.dmp

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memory/456-69-0x0000000000400000-0x0000000000593000-memory.dmp

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memory/1688-65-0x000007FEFB8A1000-0x000007FEFB8A3000-memory.dmp

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memory/1688-67-0x0000000001EF0000-0x0000000001F32000-memory.dmp

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memory/1688-64-0x0000000000050000-0x00000000001D2000-memory.dmp

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