nymaim | 43918d8c4473265ec9b69efd8070a14e6732bafb4e7dd39f26213217c26e9796

General

Target

file.exe
Size

1.5MB
MD5

3ec8cc709e2c6c399995935a26b1424c
SHA1

e326e1dc24819ff6b2833452b38598c943c62197
SHA256

43918d8c4473265ec9b69efd8070a14e6732bafb4e7dd39f26213217c26e9796
SHA512

b59a4414d9bebffad20d4c0ecd2b19ab42a8734333826c9d0447003e2536f41baefcce8537719264c5c10ee88a36ff29fc0db2e6a02a03bdd914ec87678569bc
SSDEEP

24576:Bizcbc+fYNbvGln0RPYdctjmb+3G2UQeIFB+4Bz1U9vetEckQjj/jCsvdfaY6z7O:qkffYNjen0RMc9mSCi+4ZtV/3/2svdfj

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

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
4512	is-U20Q5.tmp
4752	PrintFolders.exe
4284	s0eIsQVd0NT0.exe

Loads dropped DLL 1 IoCs

pid	Process
4512	is-U20Q5.tmp

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-U20Q5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-C9TBM.tmp	is-U20Q5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-EGNTM.tmp	is-U20Q5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QQTCR.tmp	is-U20Q5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8J42S.tmp	is-U20Q5.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-U20Q5.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-U20Q5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7H53E.tmp	is-U20Q5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4738U.tmp	is-U20Q5.tmp

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4752	PrintFolders.exe
4752	PrintFolders.exe
4752	PrintFolders.exe
4752	PrintFolders.exe
4752	PrintFolders.exe
4752	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4752	PrintFolders.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 620 wrote to memory of 4512	620	file.exe	80
PID 620 wrote to memory of 4512	620	file.exe	80
PID 620 wrote to memory of 4512	620	file.exe	80
PID 4512 wrote to memory of 4752	4512	is-U20Q5.tmp	81
PID 4512 wrote to memory of 4752	4512	is-U20Q5.tmp	81
PID 4512 wrote to memory of 4752	4512	is-U20Q5.tmp	81
PID 4752 wrote to memory of 4284	4752	PrintFolders.exe	84
PID 4752 wrote to memory of 4284	4752	PrintFolders.exe	84
PID 4752 wrote to memory of 4284	4752	PrintFolders.exe	84

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:620
- C:\Users\Admin\AppData\Local\Temp\is-GLQTL.tmp\is-U20Q5.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-GLQTL.tmp\is-U20Q5.tmp" /SL4 $90064 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1289975 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4512
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:4752
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\s0eIsQVd0NT0.exe
      4⤵
      Executes dropped EXE
      PID:4284

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
1.7MB

MD5
eb85e6a62b372f6c784e55d9d7ffafad

SHA1
92064fd395302ce3f40db1decabeb5d69173a732

SHA256
917dd8561fba8dbb2386d3c92589328bf1f96f7d93a7ae26019247cab7d1331d

SHA512
5ff353943e2c24260e2e98b48fdd2d958f53ccdebbf934322c1123ec417500c113e787548c8a84e85b7d746c75bc7a28cec8f4a1c447f1edcfa773fba693421e

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

Filesize
1.7MB

MD5
eb85e6a62b372f6c784e55d9d7ffafad

SHA1
92064fd395302ce3f40db1decabeb5d69173a732

SHA256
917dd8561fba8dbb2386d3c92589328bf1f96f7d93a7ae26019247cab7d1331d

SHA512
5ff353943e2c24260e2e98b48fdd2d958f53ccdebbf934322c1123ec417500c113e787548c8a84e85b7d746c75bc7a28cec8f4a1c447f1edcfa773fba693421e

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-87JBJ.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-GLQTL.tmp\is-U20Q5.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-GLQTL.tmp\is-U20Q5.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\s0eIsQVd0NT0.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\s0eIsQVd0NT0.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/620-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/620-138-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4752-142-0x0000000000400000-0x00000000013B6000-memory.dmp

Filesize
15.7MB

Download
memory/4752-145-0x0000000000400000-0x00000000013B6000-memory.dmp

Filesize
15.7MB

Download
memory/4752-144-0x0000000000400000-0x00000000013B6000-memory.dmp

Filesize
15.7MB

Download
memory/4752-143-0x0000000000400000-0x00000000013B6000-memory.dmp

Filesize
15.7MB

Download
memory/4752-149-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download

Analysis

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