nymaim | e2da3fe6413e3179962df95e4b1053624d04d344a6fc2569802c399034cd7ab5

Analysis

max time kernel
116s
max time network
123s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
25/09/2022, 03:48

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General

Target
file.exe
Size 284KB
Sample220925-ecr1bsdba3
SHA256 e2da3fe6413e3179962df95e4b1053624d04d344a6fc2569802c399034cd7ab5
MD5 1d641364bd0f59de6b2d04e377c43e00
SHA1 a233c753f0e2029aeb51ad2c83caecf659a0dbe8
SHA512 048fec014c7a1b72d8b85b671ee5a1e4a0a4edf19779ff27691409bc83d8606c1439ab641eb4ad12643c7eaf64042a3e353d97e8e26a59b8bf061e2b95b52965
SSDEEP 3072:vLOGALx3IIfSN5HbPjhN2jUhZg5k9zMllW2BiC0xcnJWeVta28mVyRwBZU/PkkXx:kLxjf4bF0jUbgmZu9iC06Jbm28mVy
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
1172	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1928	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1892	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
832	1172	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
1656	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1968	file.exe
1968	file.exe
1968	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1172	Cleaner.exe
Token: SeDebugPrivilege	1656	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 1892	1968	file.exe	29
PID 1968 wrote to memory of 1892	1968	file.exe	29
PID 1968 wrote to memory of 1892	1968	file.exe	29
PID 1968 wrote to memory of 1892	1968	file.exe	29
PID 1892 wrote to memory of 1172	1892	cmd.exe	31
PID 1892 wrote to memory of 1172	1892	cmd.exe	31
PID 1892 wrote to memory of 1172	1892	cmd.exe	31
PID 1892 wrote to memory of 1172	1892	cmd.exe	31
PID 1172 wrote to memory of 832	1172	Cleaner.exe	33
PID 1172 wrote to memory of 832	1172	Cleaner.exe	33
PID 1172 wrote to memory of 832	1172	Cleaner.exe	33
PID 1968 wrote to memory of 1928	1968	file.exe	34
PID 1968 wrote to memory of 1928	1968	file.exe	34
PID 1968 wrote to memory of 1928	1968	file.exe	34
PID 1968 wrote to memory of 1928	1968	file.exe	34
PID 1928 wrote to memory of 1656	1928	cmd.exe	36
PID 1928 wrote to memory of 1656	1928	cmd.exe	36
PID 1928 wrote to memory of 1656	1928	cmd.exe	36
PID 1928 wrote to memory of 1656	1928	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:1968
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\7dgssgX9wLPMgTT\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1892
- - C:\Users\Admin\AppData\Local\Temp\7dgssgX9wLPMgTT\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\7dgssgX9wLPMgTT\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1172
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1172 -s 1148
      4⤵
      Program crash
      PID:832
- 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:1928
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1656

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\7dgssgX9wLPMgTT\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\7dgssgX9wLPMgTT\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\7dgssgX9wLPMgTT\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\7dgssgX9wLPMgTT\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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memory/1172-67-0x0000000000410000-0x0000000000452000-memory.dmp

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memory/1172-64-0x0000000000250000-0x00000000003D0000-memory.dmp

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memory/1172-65-0x000007FEFB931000-0x000007FEFB933000-memory.dmp

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memory/1968-56-0x0000000000230000-0x0000000000330000-memory.dmp

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memory/1968-68-0x0000000000230000-0x0000000000330000-memory.dmp

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memory/1968-69-0x0000000000400000-0x00000000005A1000-memory.dmp

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memory/1968-55-0x0000000075141000-0x0000000075143000-memory.dmp

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memory/1968-71-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1968-57-0x00000000003A0000-0x00000000003DF000-memory.dmp

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memory/1968-76-0x0000000000230000-0x0000000000330000-memory.dmp

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memory/1968-58-0x0000000000400000-0x00000000005A1000-memory.dmp

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memory/1968-78-0x0000000000400000-0x00000000005A1000-memory.dmp

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