nymaim | 22f55b6fb8f67efba66e66cdb0ae32fd0e93c4e29e855c6794ebd2e854b49b5e

Analysis

max time kernel
56s
max time network
58s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
12/01/2023, 22:17

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General

Target
file.exe
Size 1.5MB
Sample230112-17cd1sfa2z
SHA256 22f55b6fb8f67efba66e66cdb0ae32fd0e93c4e29e855c6794ebd2e854b49b5e
MD5 c0fd07553cf811cca30558dfff08dc42
SHA1 1dc57a4ec51025cd0adf7f07ae87fd8f8ccb0d07
SHA512 133f9f6f9ec1d2d4ff47f46b6bf0da792faded0f247c91179b65ca8a119f9d6e8a781b9a8d2b5f2cfa3fc0df229b76caa90e629891f3a036e63488819b039cd9
SSDEEP 24576:220Sx+VsSXLxNF1/bC54AOtipMhb3x1mm52qjhSOpZIVwzOy6fvqpIgXC75ld1qP:2287XtP1TCaAQGPqjYfyOd1qapk
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
1668	file.tmp
1748	MitFiles138.exe
1756	DfCitYzsFl.exe

Loads dropped DLL 6 IoCs

pid	Process
1392	file.exe
1668	file.tmp
1668	file.tmp
1668	file.tmp
1668	file.tmp
1748	MitFiles138.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Mit Files\is-FEJKP.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-GIOE0.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-2S3OC.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-E13OM.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-E3C3I.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-KM736.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Mit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Mit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-0UHIP.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-S4DNH.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-3BCFJ.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-RPK32.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-E2DUI.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Mit Files\MitFiles138.exe	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-6G2NK.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-9MS9P.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-36MUI.tmp	file.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
1676	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1748	MitFiles138.exe
1748	MitFiles138.exe
1748	MitFiles138.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1676	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1392 wrote to memory of 1668	1392	file.exe	27
PID 1392 wrote to memory of 1668	1392	file.exe	27
PID 1392 wrote to memory of 1668	1392	file.exe	27
PID 1392 wrote to memory of 1668	1392	file.exe	27
PID 1392 wrote to memory of 1668	1392	file.exe	27
PID 1392 wrote to memory of 1668	1392	file.exe	27
PID 1392 wrote to memory of 1668	1392	file.exe	27
PID 1668 wrote to memory of 1748	1668	file.tmp	28
PID 1668 wrote to memory of 1748	1668	file.tmp	28
PID 1668 wrote to memory of 1748	1668	file.tmp	28
PID 1668 wrote to memory of 1748	1668	file.tmp	28
PID 1748 wrote to memory of 1756	1748	MitFiles138.exe	29
PID 1748 wrote to memory of 1756	1748	MitFiles138.exe	29
PID 1748 wrote to memory of 1756	1748	MitFiles138.exe	29
PID 1748 wrote to memory of 1756	1748	MitFiles138.exe	29
PID 1748 wrote to memory of 1208	1748	MitFiles138.exe	32
PID 1748 wrote to memory of 1208	1748	MitFiles138.exe	32
PID 1748 wrote to memory of 1208	1748	MitFiles138.exe	32
PID 1748 wrote to memory of 1208	1748	MitFiles138.exe	32
PID 1208 wrote to memory of 1676	1208	cmd.exe	34
PID 1208 wrote to memory of 1676	1208	cmd.exe	34
PID 1208 wrote to memory of 1676	1208	cmd.exe	34
PID 1208 wrote to memory of 1676	1208	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1392
- C:\Users\Admin\AppData\Local\Temp\is-5NRDT.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-5NRDT.tmp\file.tmp" /SL5="$60120,1352000,483328,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1668
- - C:\Program Files (x86)\Mit Files\MitFiles138.exe
    "C:\Program Files (x86)\Mit Files\MitFiles138.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1748
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\DfCitYzsFl.exe
      4⤵
      Executes dropped EXE
      PID:1756
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "MitFiles138.exe" /f & erase "C:\Program Files (x86)\Mit Files\MitFiles138.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1208
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "MitFiles138.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1676

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

MitFiles138.exe

Path C:\Program Files (x86)\Mit Files\MitFiles138.exe
Size 1.8MB
SHA256 2ec31d873f0f65489f6c0c21f1e6642088be3826d00178e9f9223013f2aa708e
MD5 59588fb2812a78c3d8b01a77b2e755d4
SHA1 6fa8727726c4cbf20168a9c2cb1e2cd12867fb6b
SHA512 ab686bb6215aa06cfa3da2f4d0a967066cebd5f46dec995dc64c2887d0eae1a4b91049cc2d43328f2105731b957b870fc55fab4d1f4f0c4cbd28d8cf0f268545
SSDEEP 24576:VdsggSz3yqyc64TijGQcwSmJJsX+SCb2ddayE:VdsggSbty/NGY0dYyE
MD5 SHA1 SHA512 SSDEEP

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MitFiles138.exe

Path C:\Program Files (x86)\Mit Files\MitFiles138.exe
Size 1.8MB
SHA256 2ec31d873f0f65489f6c0c21f1e6642088be3826d00178e9f9223013f2aa708e
MD5 59588fb2812a78c3d8b01a77b2e755d4
SHA1 6fa8727726c4cbf20168a9c2cb1e2cd12867fb6b
SHA512 ab686bb6215aa06cfa3da2f4d0a967066cebd5f46dec995dc64c2887d0eae1a4b91049cc2d43328f2105731b957b870fc55fab4d1f4f0c4cbd28d8cf0f268545
SSDEEP 24576:VdsggSz3yqyc64TijGQcwSmJJsX+SCb2ddayE:VdsggSbty/NGY0dYyE
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5NRDT.tmp\file.tmp
Size 695KB
SHA256 f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734
MD5 415533bb40980951c966665cff9e2fe7
SHA1 fce396c8fa01876dd008f22c8be9a9b706f4aaec
SHA512 3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae
SSDEEP 12288:zuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNQXExyc:zN/ac4cUrPN37qzHxA6odmL+tNE70tmZ
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5NRDT.tmp\file.tmp
Size 695KB
SHA256 f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734
MD5 415533bb40980951c966665cff9e2fe7
SHA1 fce396c8fa01876dd008f22c8be9a9b706f4aaec
SHA512 3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae
SSDEEP 12288:zuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNQXExyc:zN/ac4cUrPN37qzHxA6odmL+tNE70tmZ
MD5 SHA1 SHA512 SSDEEP

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DfCitYzsFl.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\DfCitYzsFl.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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MitFiles138.exe

Path \Program Files (x86)\Mit Files\MitFiles138.exe
Size 1.8MB
SHA256 2ec31d873f0f65489f6c0c21f1e6642088be3826d00178e9f9223013f2aa708e
MD5 59588fb2812a78c3d8b01a77b2e755d4
SHA1 6fa8727726c4cbf20168a9c2cb1e2cd12867fb6b
SHA512 ab686bb6215aa06cfa3da2f4d0a967066cebd5f46dec995dc64c2887d0eae1a4b91049cc2d43328f2105731b957b870fc55fab4d1f4f0c4cbd28d8cf0f268545
SSDEEP 24576:VdsggSz3yqyc64TijGQcwSmJJsX+SCb2ddayE:VdsggSbty/NGY0dYyE
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path \Users\Admin\AppData\Local\Temp\is-5NRDT.tmp\file.tmp
Size 695KB
SHA256 f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734
MD5 415533bb40980951c966665cff9e2fe7
SHA1 fce396c8fa01876dd008f22c8be9a9b706f4aaec
SHA512 3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae
SSDEEP 12288:zuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNQXExyc:zN/ac4cUrPN37qzHxA6odmL+tNE70tmZ
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-A2QN1.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-A2QN1.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-A2QN1.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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DfCitYzsFl.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\DfCitYzsFl.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/1392-68-0x0000000000400000-0x000000000047D000-memory.dmp

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memory/1392-55-0x0000000000400000-0x000000000047D000-memory.dmp

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memory/1392-85-0x0000000000400000-0x000000000047D000-memory.dmp

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memory/1392-54-0x0000000075601000-0x0000000075603000-memory.dmp

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memory/1668-69-0x0000000003630000-0x00000000045F2000-memory.dmp

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memory/1748-73-0x0000000000400000-0x00000000013C2000-memory.dmp

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memory/1748-77-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1748-81-0x0000000000400000-0x00000000013C2000-memory.dmp

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memory/1748-84-0x0000000000400000-0x00000000013C2000-memory.dmp

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memory/1748-71-0x0000000000400000-0x00000000013C2000-memory.dmp

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memory/1748-70-0x0000000000400000-0x00000000013C2000-memory.dmp

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