nymaim | 263cf6e3beb5a051135af6126b126b6c3c3d926a0fdaa2cf010476d221c271d4

Analysis

max time kernel
62s
max time network
66s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
29-12-2022 16:30

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General

Target

file.exe
Size

1.9MB
MD5

913e143128f73cb55e85882c86555ad7
SHA1

0774a64ba0e7caafd711584e0eab418c504d1aa2
SHA256

263cf6e3beb5a051135af6126b126b6c3c3d926a0fdaa2cf010476d221c271d4
SHA512

36ea094ded09cad926ea1b58b4eaeaac4634798b075b1769e9d9f67bf999217576d6839051994b134357eee675ebcda8cabdb68229ffae75a82d3e3b0ea8406c
SSDEEP

49152:Bih2AtJkqdle+Qf5GO+7iZMEW0EbElNBH4+Hth96r:BiVar5G1iCEWtYZH4+HtH2

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
1692	is-8418Q.tmp
1316	SplitFiles124.exe
1412	Bkoo87yKjN.exe

Loads dropped DLL 10 IoCs

pid	Process
1128	file.exe
1692	is-8418Q.tmp
1692	is-8418Q.tmp
1692	is-8418Q.tmp
1692	is-8418Q.tmp
1316	SplitFiles124.exe
1316	SplitFiles124.exe
1316	SplitFiles124.exe
1412	Bkoo87yKjN.exe
1412	Bkoo87yKjN.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)\Split Files\is-7OV20.tmp	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\language\is-NHP9K.tmp	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\language\is-GI1NJ.tmp	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\language\is-SFD3M.tmp	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\is-LO5UL.tmp	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\language\is-KJPT5.tmp	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\language\is-TJOJS.tmp	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\is-4B2KD.tmp	is-8418Q.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles124.exe	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\is-5QE3Q.tmp	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\language\is-CLGM0.tmp	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\language\is-JA460.tmp	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\language\is-IH6Q8.tmp	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\language\is-DSJVC.tmp	is-8418Q.tmp
File created	C:\Program Files (x86)\Split Files\is-BDLT5.tmp	is-8418Q.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-8418Q.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
1832	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1316	SplitFiles124.exe
1316	SplitFiles124.exe
1316	SplitFiles124.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1832	taskkill.exe
Token: SeRestorePrivilege	1692	is-8418Q.tmp
Token: SeBackupPrivilege	1692	is-8418Q.tmp

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1128 wrote to memory of 1692	1128	file.exe	27
PID 1128 wrote to memory of 1692	1128	file.exe	27
PID 1128 wrote to memory of 1692	1128	file.exe	27
PID 1128 wrote to memory of 1692	1128	file.exe	27
PID 1128 wrote to memory of 1692	1128	file.exe	27
PID 1128 wrote to memory of 1692	1128	file.exe	27
PID 1128 wrote to memory of 1692	1128	file.exe	27
PID 1692 wrote to memory of 1316	1692	is-8418Q.tmp	28
PID 1692 wrote to memory of 1316	1692	is-8418Q.tmp	28
PID 1692 wrote to memory of 1316	1692	is-8418Q.tmp	28
PID 1692 wrote to memory of 1316	1692	is-8418Q.tmp	28
PID 1692 wrote to memory of 1316	1692	is-8418Q.tmp	28
PID 1692 wrote to memory of 1316	1692	is-8418Q.tmp	28
PID 1692 wrote to memory of 1316	1692	is-8418Q.tmp	28
PID 1316 wrote to memory of 1412	1316	SplitFiles124.exe	29
PID 1316 wrote to memory of 1412	1316	SplitFiles124.exe	29
PID 1316 wrote to memory of 1412	1316	SplitFiles124.exe	29
PID 1316 wrote to memory of 1412	1316	SplitFiles124.exe	29
PID 1316 wrote to memory of 1412	1316	SplitFiles124.exe	29
PID 1316 wrote to memory of 1412	1316	SplitFiles124.exe	29
PID 1316 wrote to memory of 1412	1316	SplitFiles124.exe	29
PID 1316 wrote to memory of 1552	1316	SplitFiles124.exe	32
PID 1316 wrote to memory of 1552	1316	SplitFiles124.exe	32
PID 1316 wrote to memory of 1552	1316	SplitFiles124.exe	32
PID 1316 wrote to memory of 1552	1316	SplitFiles124.exe	32
PID 1316 wrote to memory of 1552	1316	SplitFiles124.exe	32
PID 1316 wrote to memory of 1552	1316	SplitFiles124.exe	32
PID 1316 wrote to memory of 1552	1316	SplitFiles124.exe	32
PID 1552 wrote to memory of 1832	1552	cmd.exe	34
PID 1552 wrote to memory of 1832	1552	cmd.exe	34
PID 1552 wrote to memory of 1832	1552	cmd.exe	34
PID 1552 wrote to memory of 1832	1552	cmd.exe	34
PID 1552 wrote to memory of 1832	1552	cmd.exe	34
PID 1552 wrote to memory of 1832	1552	cmd.exe	34
PID 1552 wrote to memory of 1832	1552	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:1128
- C:\Users\Admin\AppData\Local\Temp\is-BDQFI.tmp\is-8418Q.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-BDQFI.tmp\is-8418Q.tmp" /SL4 $70124 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1740255 166400
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1692
- - C:\Program Files (x86)\Split Files\SplitFiles124.exe
    "C:\Program Files (x86)\Split Files\SplitFiles124.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1316
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Bkoo87yKjN.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:1412
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles124.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles124.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1552
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles124.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1832

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)\Split Files\SplitFiles124.exe

Filesize
3.2MB

MD5
cd0b1262da58b6674d8b1557408e79cd

SHA1
ebd0360bfab85d79b80e6555b868cbbe3d53901a

SHA256
1ac2ecf7469437ae373dacf32fcd4f913c4b286caf26a8eead1ed8d433d43d03

SHA512
e8d35f23f2e2b0865cd338dbe6e3f3c43969139abaf5d64427c6d509e4f99bd4cdb835d79934209086228b6a849e3eaff199f599ec7cc538545dbce10ce75bc2

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles124.exe

Filesize
3.2MB

MD5
cd0b1262da58b6674d8b1557408e79cd

SHA1
ebd0360bfab85d79b80e6555b868cbbe3d53901a

SHA256
1ac2ecf7469437ae373dacf32fcd4f913c4b286caf26a8eead1ed8d433d43d03

SHA512
e8d35f23f2e2b0865cd338dbe6e3f3c43969139abaf5d64427c6d509e4f99bd4cdb835d79934209086228b6a849e3eaff199f599ec7cc538545dbce10ce75bc2

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-BDQFI.tmp\is-8418Q.tmp

Filesize
756KB

MD5
88c7387a76635a30298c1fea18eb963d

SHA1
8a01e609d9f076fd09ec9eec99b512c3571efdbc

SHA256
0cf25da416c0de0814b116f3b917412415e285622149b82d6ee701d94316427b

SHA512
e3d7736fa09f81ff239ce20b9c7cfacc171b63a215f5658c0de9f57dfbb4b9fb7dd96875ecacd7e652d06ff100fa4f7fca63ba2688d48b122bf03c8dbd08ad2b

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-BDQFI.tmp\is-8418Q.tmp

Filesize
756KB

MD5
88c7387a76635a30298c1fea18eb963d

SHA1
8a01e609d9f076fd09ec9eec99b512c3571efdbc

SHA256
0cf25da416c0de0814b116f3b917412415e285622149b82d6ee701d94316427b

SHA512
e3d7736fa09f81ff239ce20b9c7cfacc171b63a215f5658c0de9f57dfbb4b9fb7dd96875ecacd7e652d06ff100fa4f7fca63ba2688d48b122bf03c8dbd08ad2b

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Bkoo87yKjN.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Bkoo87yKjN.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\Split Files\SplitFiles124.exe

Filesize
3.2MB

MD5
cd0b1262da58b6674d8b1557408e79cd

SHA1
ebd0360bfab85d79b80e6555b868cbbe3d53901a

SHA256
1ac2ecf7469437ae373dacf32fcd4f913c4b286caf26a8eead1ed8d433d43d03

SHA512
e8d35f23f2e2b0865cd338dbe6e3f3c43969139abaf5d64427c6d509e4f99bd4cdb835d79934209086228b6a849e3eaff199f599ec7cc538545dbce10ce75bc2

Download Submit
\Program Files (x86)\Split Files\SplitFiles124.exe

Filesize
3.2MB

MD5
cd0b1262da58b6674d8b1557408e79cd

SHA1
ebd0360bfab85d79b80e6555b868cbbe3d53901a

SHA256
1ac2ecf7469437ae373dacf32fcd4f913c4b286caf26a8eead1ed8d433d43d03

SHA512
e8d35f23f2e2b0865cd338dbe6e3f3c43969139abaf5d64427c6d509e4f99bd4cdb835d79934209086228b6a849e3eaff199f599ec7cc538545dbce10ce75bc2

Download Submit
\Program Files (x86)\Split Files\SplitFiles124.exe

Filesize
3.2MB

MD5
cd0b1262da58b6674d8b1557408e79cd

SHA1
ebd0360bfab85d79b80e6555b868cbbe3d53901a

SHA256
1ac2ecf7469437ae373dacf32fcd4f913c4b286caf26a8eead1ed8d433d43d03

SHA512
e8d35f23f2e2b0865cd338dbe6e3f3c43969139abaf5d64427c6d509e4f99bd4cdb835d79934209086228b6a849e3eaff199f599ec7cc538545dbce10ce75bc2

Download Submit
\Users\Admin\AppData\Local\Temp\is-3EM5K.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-3EM5K.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-3EM5K.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-BDQFI.tmp\is-8418Q.tmp

Filesize
756KB

MD5
88c7387a76635a30298c1fea18eb963d

SHA1
8a01e609d9f076fd09ec9eec99b512c3571efdbc

SHA256
0cf25da416c0de0814b116f3b917412415e285622149b82d6ee701d94316427b

SHA512
e3d7736fa09f81ff239ce20b9c7cfacc171b63a215f5658c0de9f57dfbb4b9fb7dd96875ecacd7e652d06ff100fa4f7fca63ba2688d48b122bf03c8dbd08ad2b

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Bkoo87yKjN.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Bkoo87yKjN.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Bkoo87yKjN.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1128-98-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1128-55-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1128-68-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1128-54-0x0000000076961000-0x0000000076963000-memory.dmp

Filesize
8KB

Download
memory/1316-78-0x0000000000400000-0x000000000152C000-memory.dmp

Filesize
17.2MB

Download
memory/1316-88-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1316-76-0x0000000001B90000-0x0000000002CBC000-memory.dmp

Filesize
17.2MB

Download
memory/1316-75-0x0000000001B90000-0x0000000002CBC000-memory.dmp

Filesize
17.2MB

Download
memory/1316-74-0x0000000000400000-0x000000000152C000-memory.dmp

Filesize
17.2MB

Download
memory/1316-97-0x0000000000400000-0x000000000152C000-memory.dmp

Filesize
17.2MB

Download
memory/1316-92-0x0000000000400000-0x000000000152C000-memory.dmp

Filesize
17.2MB

Download
memory/1316-77-0x0000000000400000-0x000000000152C000-memory.dmp

Filesize
17.2MB

Download
memory/1316-87-0x0000000000400000-0x000000000152C000-memory.dmp

Filesize
17.2MB

Download
memory/1692-86-0x0000000003A60000-0x0000000004B8C000-memory.dmp

Filesize
17.2MB

Download
memory/1692-73-0x0000000003A60000-0x0000000004B8C000-memory.dmp

Filesize
17.2MB

Download