nymaim | 4098ed30f5e2a1d453182391fcef81703351574f6c286ac4308bf0be675de907

General

Target

file.exe
Size

353KB
MD5

b90bf592eb12ad336d85227381f6cd97
SHA1

3e89a8b2cd8a7c1168b698027570dbaf4324cd36
SHA256

4098ed30f5e2a1d453182391fcef81703351574f6c286ac4308bf0be675de907
SHA512

af580dbf51df295bb5078126c062cc6dc4e8027fccc7cbb7b61c5df17a5c15c1321d43be4136dd43f75a2ad7d256cd46b7893b4af9171875c4e999921b7a5772
SSDEEP

6144:B4J7ELi+hv99zL+bp1Cf0pgseVPlloeYbr/uzbgwuxc1wVf:2Cm+hv99XGw+gs8P4jHunnqc

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

C2

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
1444	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1900	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1404	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x000a0000000122d1-59.dat	autoit_exe
behavioral1/files/0x000a0000000122d1-61.dat	autoit_exe
behavioral1/files/0x000a0000000122d1-62.dat	autoit_exe

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
1108	1444	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
1472	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1280	file.exe
1280	file.exe
1280	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1444	Cleaner.exe
Token: SeDebugPrivilege	1472	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1280 wrote to memory of 1404	1280	file.exe	30
PID 1280 wrote to memory of 1404	1280	file.exe	30
PID 1280 wrote to memory of 1404	1280	file.exe	30
PID 1280 wrote to memory of 1404	1280	file.exe	30
PID 1404 wrote to memory of 1444	1404	cmd.exe	32
PID 1404 wrote to memory of 1444	1404	cmd.exe	32
PID 1404 wrote to memory of 1444	1404	cmd.exe	32
PID 1404 wrote to memory of 1444	1404	cmd.exe	32
PID 1444 wrote to memory of 1108	1444	Cleaner.exe	34
PID 1444 wrote to memory of 1108	1444	Cleaner.exe	34
PID 1444 wrote to memory of 1108	1444	Cleaner.exe	34
PID 1280 wrote to memory of 1900	1280	file.exe	35
PID 1280 wrote to memory of 1900	1280	file.exe	35
PID 1280 wrote to memory of 1900	1280	file.exe	35
PID 1280 wrote to memory of 1900	1280	file.exe	35
PID 1900 wrote to memory of 1472	1900	cmd.exe	37
PID 1900 wrote to memory of 1472	1900	cmd.exe	37
PID 1900 wrote to memory of 1472	1900	cmd.exe	37
PID 1900 wrote to memory of 1472	1900	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:1280
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\AKE1Kkm1aX\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1404
- - C:\Users\Admin\AppData\Local\Temp\AKE1Kkm1aX\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\AKE1Kkm1aX\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1444
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1444 -s 1144
      4⤵
      Program crash
      PID:1108
- 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:1900
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1472

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

1

T1102

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\AKE1Kkm1aX\Bunifu_UI_v1.5.3.dll

Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\AKE1Kkm1aX\Cleaner.exe

Filesize
3.8MB

MD5
04514bd4962f7d60679434e0ebe49184

SHA1
1493a5447eb8156a7d7aecff60ee8bfba2209526

SHA256
c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568

SHA512
a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e

Download Submit
C:\Users\Admin\AppData\Local\Temp\AKE1Kkm1aX\Cleaner.exe

Filesize
3.8MB

MD5
04514bd4962f7d60679434e0ebe49184

SHA1
1493a5447eb8156a7d7aecff60ee8bfba2209526

SHA256
c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568

SHA512
a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e

Download Submit
\Users\Admin\AppData\Local\Temp\AKE1Kkm1aX\Cleaner.exe

Filesize
3.8MB

MD5
04514bd4962f7d60679434e0ebe49184

SHA1
1493a5447eb8156a7d7aecff60ee8bfba2209526

SHA256
c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568

SHA512
a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e

Download Submit
memory/1280-54-0x0000000075811000-0x0000000075813000-memory.dmp

Filesize
8KB

Download
memory/1280-76-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1280-55-0x00000000005FC000-0x0000000000622000-memory.dmp

Filesize
152KB

Download
memory/1280-57-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1280-64-0x00000000005FC000-0x0000000000622000-memory.dmp

Filesize
152KB

Download
memory/1280-65-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1280-75-0x00000000005FC000-0x0000000000622000-memory.dmp

Filesize
152KB

Download
memory/1280-56-0x0000000000220000-0x000000000025F000-memory.dmp

Filesize
252KB

Download
memory/1280-70-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1444-63-0x0000000000D30000-0x0000000000E86000-memory.dmp

Filesize
1.3MB

Download
memory/1444-68-0x0000000000300000-0x0000000000342000-memory.dmp

Filesize
264KB

Download
memory/1444-66-0x000007FEFB931000-0x000007FEFB933000-memory.dmp

Filesize
8KB

Download

Analysis

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