nymaim | eede6d5ec55cb31d875c5f746f7f66304babf2195cbaa4aeb860b785385ca7b6

Analysis

max time kernel
147s
max time network
150s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
05/10/2022, 04:07

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General

Target
file.exe
Size 359KB
Sample221005-epmldadcd8
SHA256 eede6d5ec55cb31d875c5f746f7f66304babf2195cbaa4aeb860b785385ca7b6
MD5 f4518ef369fb1768bb2df4c0e4a43d4f
SHA1 b2e1221e65173d6bc149f0ada100b208fac29434
SHA512 b6fb52c1729a1990148ee5829baa7d81c1ec7fd9ef6002ea9f269cada1ab3ea9d5c2e14bad3132f3033a031f6485c4a9f1078a634c2a03c24aaec87bccaf8eb3
SSDEEP 6144:QwAmLinH6XYTVQr7febSJXPHBaF5QnEgdtva2uzbgwuuhHwVf:QwHWnaXYpQ/eU/w8rDunn
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
1668	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1076	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
944	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/0x000a000000012353-59.dat	autoit_exe
behavioral1/files/0x000a000000012353-61.dat	autoit_exe
behavioral1/files/0x000a000000012353-62.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
268	1668	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
1684	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1512	file.exe
1512	file.exe
1512	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1668	Cleaner.exe
Token: SeDebugPrivilege	1684	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1512 wrote to memory of 944	1512	file.exe	29
PID 1512 wrote to memory of 944	1512	file.exe	29
PID 1512 wrote to memory of 944	1512	file.exe	29
PID 1512 wrote to memory of 944	1512	file.exe	29
PID 944 wrote to memory of 1668	944	cmd.exe	31
PID 944 wrote to memory of 1668	944	cmd.exe	31
PID 944 wrote to memory of 1668	944	cmd.exe	31
PID 944 wrote to memory of 1668	944	cmd.exe	31
PID 1668 wrote to memory of 268	1668	Cleaner.exe	33
PID 1668 wrote to memory of 268	1668	Cleaner.exe	33
PID 1668 wrote to memory of 268	1668	Cleaner.exe	33
PID 1512 wrote to memory of 1076	1512	file.exe	34
PID 1512 wrote to memory of 1076	1512	file.exe	34
PID 1512 wrote to memory of 1076	1512	file.exe	34
PID 1512 wrote to memory of 1076	1512	file.exe	34
PID 1076 wrote to memory of 1684	1076	cmd.exe	36
PID 1076 wrote to memory of 1684	1076	cmd.exe	36
PID 1076 wrote to memory of 1684	1076	cmd.exe	36
PID 1076 wrote to memory of 1684	1076	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:1512
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\oYhxDPfndKEH\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:944
- - C:\Users\Admin\AppData\Local\Temp\oYhxDPfndKEH\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\oYhxDPfndKEH\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1668
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1668 -s 1156
      4⤵
      Program crash
      PID:268
- 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:1076
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1684

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\oYhxDPfndKEH\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\oYhxDPfndKEH\Cleaner.exe
Size 3.8MB
SHA256 c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568
MD5 04514bd4962f7d60679434e0ebe49184
SHA1 1493a5447eb8156a7d7aecff60ee8bfba2209526
SHA512 a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e
SSDEEP 49152:+/PD/DL/D9CuZrr2h60qPPB+lJJkF9IC966eB+lJJkF9IC966eB+lJJkF9IC966h:+3D///UUrP43m8C/3m8C/3m8C5
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\oYhxDPfndKEH\Cleaner.exe
Size 3.8MB
SHA256 c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568
MD5 04514bd4962f7d60679434e0ebe49184
SHA1 1493a5447eb8156a7d7aecff60ee8bfba2209526
SHA512 a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e
SSDEEP 49152:+/PD/DL/D9CuZrr2h60qPPB+lJJkF9IC966eB+lJJkF9IC966eB+lJJkF9IC966h:+3D///UUrP43m8C/3m8C/3m8C5
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\oYhxDPfndKEH\Cleaner.exe
Size 3.8MB
SHA256 c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568
MD5 04514bd4962f7d60679434e0ebe49184
SHA1 1493a5447eb8156a7d7aecff60ee8bfba2209526
SHA512 a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e
SSDEEP 49152:+/PD/DL/D9CuZrr2h60qPPB+lJJkF9IC966eB+lJJkF9IC966eB+lJJkF9IC966h:+3D///UUrP43m8C/3m8C/3m8C5
MD5 SHA1 SHA512 SSDEEP

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memory/1512-63-0x000000000063C000-0x0000000000662000-memory.dmp

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memory/1512-70-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1512-57-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1512-64-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1512-76-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1512-75-0x000000000063C000-0x0000000000662000-memory.dmp

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memory/1512-55-0x000000000063C000-0x0000000000662000-memory.dmp

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memory/1512-56-0x0000000000220000-0x000000000025F000-memory.dmp

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memory/1512-54-0x00000000756A1000-0x00000000756A3000-memory.dmp

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memory/1668-68-0x00000000005F0000-0x0000000000632000-memory.dmp

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memory/1668-66-0x000007FEFC181000-0x000007FEFC183000-memory.dmp

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memory/1668-65-0x0000000000020000-0x0000000000176000-memory.dmp

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