nymaim | cbef68f0196d1dd5d4226824593481affa8deacb3aa8f513cc46ce6b7079eea8

Analysis

max time kernel
117s
max time network
120s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
26/09/2022, 13:06

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 241KB
Sample220926-qb2zpaaha9
SHA256 cbef68f0196d1dd5d4226824593481affa8deacb3aa8f513cc46ce6b7079eea8
MD5 6bb8f5332a13cd525149708a68a44c1f
SHA1 1378147587efd5db076f07f902b8650e24347985
SHA512 a0fc8cf704c21c90afb4f9e1575c4b9fdadc7ff0a4b2a2ad13b9570e3636b9f98db0af74b0d33ac5fe366176a80357ebb9d5b52e5e0334bfabc924630e330e2a
SSDEEP 3072:knjITF5p+WgGfnzlPs9EYFYdgd7LQmz2QiEsHSkxi5NvcNzFcVDLB25B:Ay+WpzA3uud4U2vEsHSkxYviFcV
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
992	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1380	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1492	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
2016	992	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
1252	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1672	file.exe
1672	file.exe
1672	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	992	Cleaner.exe
Token: SeDebugPrivilege	1252	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 1492	1672	file.exe	29
PID 1672 wrote to memory of 1492	1672	file.exe	29
PID 1672 wrote to memory of 1492	1672	file.exe	29
PID 1672 wrote to memory of 1492	1672	file.exe	29
PID 1492 wrote to memory of 992	1492	cmd.exe	31
PID 1492 wrote to memory of 992	1492	cmd.exe	31
PID 1492 wrote to memory of 992	1492	cmd.exe	31
PID 1492 wrote to memory of 992	1492	cmd.exe	31
PID 992 wrote to memory of 2016	992	Cleaner.exe	33
PID 992 wrote to memory of 2016	992	Cleaner.exe	33
PID 992 wrote to memory of 2016	992	Cleaner.exe	33
PID 1672 wrote to memory of 1380	1672	file.exe	34
PID 1672 wrote to memory of 1380	1672	file.exe	34
PID 1672 wrote to memory of 1380	1672	file.exe	34
PID 1672 wrote to memory of 1380	1672	file.exe	34
PID 1380 wrote to memory of 1252	1380	cmd.exe	36
PID 1380 wrote to memory of 1252	1380	cmd.exe	36
PID 1380 wrote to memory of 1252	1380	cmd.exe	36
PID 1380 wrote to memory of 1252	1380	cmd.exe	36

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:1672
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\9Y1KyZ9HaJ\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1492
- - C:\Users\Admin\AppData\Local\Temp\9Y1KyZ9HaJ\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\9Y1KyZ9HaJ\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:992
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 992 -s 1148
      4⤵
      Program crash
      PID:2016
- 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:1380
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1252

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

Loading Replay Monitor...

Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\9Y1KyZ9HaJ\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

Submit Download

Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\9Y1KyZ9HaJ\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\9Y1KyZ9HaJ\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 \Users\Admin\AppData\Local\Temp\9Y1KyZ9HaJ\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/992-64-0x000007FEFB7F1000-0x000007FEFB7F3000-memory.dmp

Download

memory/992-63-0x0000000000BF0000-0x0000000000D72000-memory.dmp

Download

memory/992-66-0x0000000000AB0000-0x0000000000AF2000-memory.dmp

Download

memory/1672-54-0x0000000075111000-0x0000000075113000-memory.dmp

Download

memory/1672-55-0x000000000030B000-0x0000000000332000-memory.dmp

Download

memory/1672-56-0x00000000001B0000-0x00000000001EF000-memory.dmp

Download

memory/1672-67-0x000000000030B000-0x0000000000332000-memory.dmp

Download

memory/1672-68-0x0000000000400000-0x0000000000599000-memory.dmp

Download

memory/1672-70-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/1672-75-0x000000000030B000-0x0000000000332000-memory.dmp

Download

memory/1672-77-0x0000000000400000-0x0000000000599000-memory.dmp

Download

memory/1672-57-0x0000000000400000-0x0000000000599000-memory.dmp

Download