nymaim | 3a978ceeb455e626596f38b479690abb82a464833f2e9f25ca14afca6f6f9b9a

Analysis

max time kernel
120s
max time network
122s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
28/09/2022, 07:03

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General

Target
file.exe
Size 415KB
Sample220928-hvb9dagdbm
SHA256 3a978ceeb455e626596f38b479690abb82a464833f2e9f25ca14afca6f6f9b9a
MD5 fe580254d84973123f5b5088daadacf7
SHA1 0ef9e0dc36d81220a59d5997310f698e7f03a36c
SHA512 751eb1e331999de672ebf5358d8cffd4a567d99dfb306352dd45067dd2c7170f04465e584c4866d79644ba25b2a40dcd242a90bba924313b363c1e66c6c7af5a
SSDEEP 6144:mjhZEoUxuc1t4Pa68NEbNswqaybVqS0CR0iIpnigabwVfs:mjhZjfc1aWEhsPV4iMiB
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
268	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
932	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
544	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
1500	268	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
1216	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

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

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	268	Cleaner.exe
Token: SeDebugPrivilege	1216	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1912 wrote to memory of 544	1912	file.exe	30
PID 1912 wrote to memory of 544	1912	file.exe	30
PID 1912 wrote to memory of 544	1912	file.exe	30
PID 1912 wrote to memory of 544	1912	file.exe	30
PID 544 wrote to memory of 268	544	cmd.exe	32
PID 544 wrote to memory of 268	544	cmd.exe	32
PID 544 wrote to memory of 268	544	cmd.exe	32
PID 544 wrote to memory of 268	544	cmd.exe	32
PID 268 wrote to memory of 1500	268	Cleaner.exe	34
PID 268 wrote to memory of 1500	268	Cleaner.exe	34
PID 268 wrote to memory of 1500	268	Cleaner.exe	34
PID 1912 wrote to memory of 932	1912	file.exe	35
PID 1912 wrote to memory of 932	1912	file.exe	35
PID 1912 wrote to memory of 932	1912	file.exe	35
PID 1912 wrote to memory of 932	1912	file.exe	35
PID 932 wrote to memory of 1216	932	cmd.exe	37
PID 932 wrote to memory of 1216	932	cmd.exe	37
PID 932 wrote to memory of 1216	932	cmd.exe	37
PID 932 wrote to memory of 1216	932	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:1912
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\s6p9x1Bsj1xQ\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:544
- - C:\Users\Admin\AppData\Local\Temp\s6p9x1Bsj1xQ\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\s6p9x1Bsj1xQ\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:268
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 268 -s 1156
      4⤵
      Program crash
      PID:1500
- 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:932
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1216

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\s6p9x1Bsj1xQ\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\s6p9x1Bsj1xQ\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\s6p9x1Bsj1xQ\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\s6p9x1Bsj1xQ\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/268-67-0x000000001B1A0000-0x000000001B1E2000-memory.dmp

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memory/268-65-0x000007FEFC1F1000-0x000007FEFC1F3000-memory.dmp

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memory/268-64-0x00000000012B0000-0x0000000001432000-memory.dmp

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memory/1912-57-0x0000000000260000-0x000000000029F000-memory.dmp

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memory/1912-55-0x00000000763F1000-0x00000000763F3000-memory.dmp

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memory/1912-68-0x0000000000628000-0x000000000064F000-memory.dmp

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memory/1912-69-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/1912-54-0x0000000000628000-0x000000000064F000-memory.dmp

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memory/1912-71-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1912-56-0x0000000000628000-0x000000000064F000-memory.dmp

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memory/1912-76-0x0000000000628000-0x000000000064F000-memory.dmp

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memory/1912-77-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/1912-58-0x0000000000400000-0x000000000046D000-memory.dmp

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