nymaim | 1a5f8037808326329b5f35222701f3b138cc743dbda0a73e0933805afd4c3923

Analysis

max time kernel
61s
max time network
63s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
18/12/2022, 14:16

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General

Target

file.exe
Size

2.4MB
MD5

3a1177cc5b782468ca99e210ff396bfb
SHA1

65ea51bb1155b63c0ea7abeddde3e8ece10c8ee6
SHA256

1a5f8037808326329b5f35222701f3b138cc743dbda0a73e0933805afd4c3923
SHA512

9a795cc44d699cad3152b5fd87f749333f5d05509eacda42fe7ce03302cdb33b15961505dbe6cebc088afcbcbb741e2f30412c116ac15a2f02e53aade256fee1
SSDEEP

49152:50PBpTzM4NkP0WH+0HDDLJntOItDrj/Rn0ZxY6mqPYTg7O/d3HF:50PBp8ykPP+0HDXR7tDn/R0bP3PlQl

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
276	is-AF69E.tmp
1768	ocFolders.exe
1744	shwoj.exe

Loads dropped DLL 10 IoCs

pid	Process
1784	file.exe
276	is-AF69E.tmp
276	is-AF69E.tmp
276	is-AF69E.tmp
276	is-AF69E.tmp
1768	ocFolders.exe
1768	ocFolders.exe
1768	ocFolders.exe
1744	shwoj.exe
1744	shwoj.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 9 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-AF69E.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\ocFolders.exe	is-AF69E.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-AF69E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TCV6T.tmp	is-AF69E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QFGLM.tmp	is-AF69E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0D5E5.tmp	is-AF69E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QVFSB.tmp	is-AF69E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1FN90.tmp	is-AF69E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LIT0D.tmp	is-AF69E.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
1792	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1768	ocFolders.exe
1768	ocFolders.exe
1768	ocFolders.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	276	is-AF69E.tmp
Token: SeBackupPrivilege	276	is-AF69E.tmp
Token: SeDebugPrivilege	1792	taskkill.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1784 wrote to memory of 276	1784	file.exe	28
PID 1784 wrote to memory of 276	1784	file.exe	28
PID 1784 wrote to memory of 276	1784	file.exe	28
PID 1784 wrote to memory of 276	1784	file.exe	28
PID 1784 wrote to memory of 276	1784	file.exe	28
PID 1784 wrote to memory of 276	1784	file.exe	28
PID 1784 wrote to memory of 276	1784	file.exe	28
PID 276 wrote to memory of 1768	276	is-AF69E.tmp	29
PID 276 wrote to memory of 1768	276	is-AF69E.tmp	29
PID 276 wrote to memory of 1768	276	is-AF69E.tmp	29
PID 276 wrote to memory of 1768	276	is-AF69E.tmp	29
PID 276 wrote to memory of 1768	276	is-AF69E.tmp	29
PID 276 wrote to memory of 1768	276	is-AF69E.tmp	29
PID 276 wrote to memory of 1768	276	is-AF69E.tmp	29
PID 1768 wrote to memory of 1744	1768	ocFolders.exe	30
PID 1768 wrote to memory of 1744	1768	ocFolders.exe	30
PID 1768 wrote to memory of 1744	1768	ocFolders.exe	30
PID 1768 wrote to memory of 1744	1768	ocFolders.exe	30
PID 1768 wrote to memory of 1744	1768	ocFolders.exe	30
PID 1768 wrote to memory of 1744	1768	ocFolders.exe	30
PID 1768 wrote to memory of 1744	1768	ocFolders.exe	30
PID 1768 wrote to memory of 1880	1768	ocFolders.exe	33
PID 1768 wrote to memory of 1880	1768	ocFolders.exe	33
PID 1768 wrote to memory of 1880	1768	ocFolders.exe	33
PID 1768 wrote to memory of 1880	1768	ocFolders.exe	33
PID 1768 wrote to memory of 1880	1768	ocFolders.exe	33
PID 1768 wrote to memory of 1880	1768	ocFolders.exe	33
PID 1768 wrote to memory of 1880	1768	ocFolders.exe	33
PID 1880 wrote to memory of 1792	1880	cmd.exe	35
PID 1880 wrote to memory of 1792	1880	cmd.exe	35
PID 1880 wrote to memory of 1792	1880	cmd.exe	35
PID 1880 wrote to memory of 1792	1880	cmd.exe	35
PID 1880 wrote to memory of 1792	1880	cmd.exe	35
PID 1880 wrote to memory of 1792	1880	cmd.exe	35
PID 1880 wrote to memory of 1792	1880	cmd.exe	35

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:1784
- C:\Users\Admin\AppData\Local\Temp\is-C4NQJ.tmp\is-AF69E.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-C4NQJ.tmp\is-AF69E.tmp" /SL4 $60158 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2196239 169984
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:276
- - C:\Program Files (x86)\PrintFolders\ocFolders.exe
    "C:\Program Files (x86)\PrintFolders\ocFolders.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1768
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\shwoj.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:1744
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ocFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\ocFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1880
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ocFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1792

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

C:\Program Files (x86)\PrintFolders\ocFolders.exe

Filesize
3.6MB

MD5
dfbff7637cf3c5c622e4f1ccdcca5c1d

SHA1
e2fc20250045206ecec94c5a8bc75bd341e87942

SHA256
c5b74d8d740367ebc2a474d053452476a27a22529e409c7c1988c9129546fcaa

SHA512
a81a1797c4b51bf610a5d07ab5212827d03bbe5a8be2f69c53d7b4ee35951ea6531ca25be36629ac4cafbc015ad4926815b5ba960d2ba45cbdec882c5dc2bed0

Download Submit
C:\Program Files (x86)\PrintFolders\ocFolders.exe

Filesize
3.6MB

MD5
dfbff7637cf3c5c622e4f1ccdcca5c1d

SHA1
e2fc20250045206ecec94c5a8bc75bd341e87942

SHA256
c5b74d8d740367ebc2a474d053452476a27a22529e409c7c1988c9129546fcaa

SHA512
a81a1797c4b51bf610a5d07ab5212827d03bbe5a8be2f69c53d7b4ee35951ea6531ca25be36629ac4cafbc015ad4926815b5ba960d2ba45cbdec882c5dc2bed0

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-C4NQJ.tmp\is-AF69E.tmp

Filesize
759KB

MD5
d35c838e416f6a317c90117cc834b92b

SHA1
289a030cc78131163a8d6bc3c5dd831ac0f962a1

SHA256
2d4703dac05e8e6d136a8173f84d2618b54b6e7ef44ae5557350614bbb5a9797

SHA512
9a50f934c199b4415911cae873cebd46f682526290b41a42a882a580fed67c99f5248abfbaa367f20b471564b4cf6d62f28ed2c945206267b37788f94377f167

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-C4NQJ.tmp\is-AF69E.tmp

Filesize
759KB

MD5
d35c838e416f6a317c90117cc834b92b

SHA1
289a030cc78131163a8d6bc3c5dd831ac0f962a1

SHA256
2d4703dac05e8e6d136a8173f84d2618b54b6e7ef44ae5557350614bbb5a9797

SHA512
9a50f934c199b4415911cae873cebd46f682526290b41a42a882a580fed67c99f5248abfbaa367f20b471564b4cf6d62f28ed2c945206267b37788f94377f167

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\shwoj.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\shwoj.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\PrintFolders\ocFolders.exe

Filesize
3.6MB

MD5
dfbff7637cf3c5c622e4f1ccdcca5c1d

SHA1
e2fc20250045206ecec94c5a8bc75bd341e87942

SHA256
c5b74d8d740367ebc2a474d053452476a27a22529e409c7c1988c9129546fcaa

SHA512
a81a1797c4b51bf610a5d07ab5212827d03bbe5a8be2f69c53d7b4ee35951ea6531ca25be36629ac4cafbc015ad4926815b5ba960d2ba45cbdec882c5dc2bed0

Download Submit
\Program Files (x86)\PrintFolders\ocFolders.exe

Filesize
3.6MB

MD5
dfbff7637cf3c5c622e4f1ccdcca5c1d

SHA1
e2fc20250045206ecec94c5a8bc75bd341e87942

SHA256
c5b74d8d740367ebc2a474d053452476a27a22529e409c7c1988c9129546fcaa

SHA512
a81a1797c4b51bf610a5d07ab5212827d03bbe5a8be2f69c53d7b4ee35951ea6531ca25be36629ac4cafbc015ad4926815b5ba960d2ba45cbdec882c5dc2bed0

Download Submit
\Program Files (x86)\PrintFolders\ocFolders.exe

Filesize
3.6MB

MD5
dfbff7637cf3c5c622e4f1ccdcca5c1d

SHA1
e2fc20250045206ecec94c5a8bc75bd341e87942

SHA256
c5b74d8d740367ebc2a474d053452476a27a22529e409c7c1988c9129546fcaa

SHA512
a81a1797c4b51bf610a5d07ab5212827d03bbe5a8be2f69c53d7b4ee35951ea6531ca25be36629ac4cafbc015ad4926815b5ba960d2ba45cbdec882c5dc2bed0

Download Submit
\Users\Admin\AppData\Local\Temp\is-7EGPF.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-7EGPF.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-7EGPF.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-C4NQJ.tmp\is-AF69E.tmp

Filesize
759KB

MD5
d35c838e416f6a317c90117cc834b92b

SHA1
289a030cc78131163a8d6bc3c5dd831ac0f962a1

SHA256
2d4703dac05e8e6d136a8173f84d2618b54b6e7ef44ae5557350614bbb5a9797

SHA512
9a50f934c199b4415911cae873cebd46f682526290b41a42a882a580fed67c99f5248abfbaa367f20b471564b4cf6d62f28ed2c945206267b37788f94377f167

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\shwoj.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\shwoj.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\shwoj.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/276-70-0x0000000002F20000-0x00000000040AD000-memory.dmp

Filesize
17.6MB

Download
memory/276-86-0x0000000002F20000-0x00000000040AD000-memory.dmp

Filesize
17.6MB

Download
memory/1768-92-0x0000000001C60000-0x0000000002DED000-memory.dmp

Filesize
17.6MB

Download
memory/1768-87-0x0000000000400000-0x000000000158D000-memory.dmp

Filesize
17.6MB

Download
memory/1768-97-0x0000000000400000-0x000000000158D000-memory.dmp

Filesize
17.6MB

Download
memory/1768-77-0x0000000000400000-0x000000000158D000-memory.dmp

Filesize
17.6MB

Download
memory/1768-76-0x0000000001C60000-0x0000000002DED000-memory.dmp

Filesize
17.6MB

Download
memory/1768-93-0x0000000000400000-0x000000000158D000-memory.dmp

Filesize
17.6MB

Download
memory/1768-71-0x0000000000400000-0x000000000158D000-memory.dmp

Filesize
17.6MB

Download
memory/1768-75-0x0000000001C60000-0x0000000002DED000-memory.dmp

Filesize
17.6MB

Download
memory/1768-78-0x0000000000400000-0x000000000158D000-memory.dmp

Filesize
17.6MB

Download
memory/1768-88-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1784-54-0x00000000753C1000-0x00000000753C3000-memory.dmp

Filesize
8KB

Download
memory/1784-55-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1784-68-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1784-98-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download